{"id":43292,"date":"2021-10-08T00:00:00","date_gmt":"2021-10-08T00:00:00","guid":{"rendered":"https:\/\/www.trendmicro.com\/en_us\/research\/21\/j\/actors-target-huawei-cloud-using-upgraded-linux-malware-.html"},"modified":"2021-10-08T00:00:00","modified_gmt":"2021-10-08T00:00:00","slug":"actors-target-huawei-cloud-using-upgraded-linux-malware-sr-security-researcher-threat-researcher","status":"publish","type":"post","link":"https:\/\/www.threatshub.org\/blog\/actors-target-huawei-cloud-using-upgraded-linux-malware-sr-security-researcher-threat-researcher\/","title":{"rendered":"Actors Target Huawei Cloud Using Upgraded Linux Malware Sr. Security Researcher Threat Researcher"},"content":{"rendered":"<p><img decoding=\"async\" src=\"https:\/\/www.trendmicro.com\/content\/dam\/trendmicro\/global\/en\/research\/21\/j\/actors-target-huawei-cloud-using-upgraded-linux-malware\/Actors%20Target%20Huawei%20Cloud%20Using%20Upgraded%20Linux%20Malware_641.png\"><!-- Begin mPulse library --><!-- END mPulse library --> <head> <meta charset=\"UTF-8\"> <meta name=\"viewport\" content=\"width=device-width\"> <meta name=\"description\"> <meta name=\"robots\" content=\"index,follow\"> <meta name=\"keywords\" content=\"cloud,malware,research,articles, news, reports\"> <meta http-equiv=\"X-UA-Compatible\" content=\"IE=edge,chrome=1\"> <meta name=\"template\" content=\"article1withouthero\"> <meta property=\"article:published_time\" content=\"2021-10-08\"> <meta property=\"article:tag\" content=\"cloud\"> <meta property=\"article:section\" content=\"research\"> <link rel=\"icon\" type=\"image\/ico\" href=\"\/content\/dam\/trendmicro\/favicon.ico\"> <link rel=\"canonical\" href=\"https:\/\/www.trendmicro.com\/en_us\/research\/21\/j\/actors-target-huawei-cloud-using-upgraded-linux-malware-.html\"> <title>Actors Target Huawei Cloud Using Upgraded Linux Malware <\/title> <link href=\"https:\/\/fonts.googleapis.com\/css?family=Open+Sans:300,300i,400,400i,600\" rel=\"stylesheet\">\n<link 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content=\"@TrendMicro\"><br \/>\n<meta name=\"twitter:title\" content=\"Actors Target Huawei Cloud Using Upgraded Linux Malware \"><br \/>\n<meta name=\"twitter:image\" content=\"https:\/\/www.trendmicro.com\/content\/dam\/trendmicro\/global\/en\/research\/21\/j\/actors-target-huawei-cloud-using-upgraded-linux-malware\/Actors%20Target%20Huawei%20Cloud%20Using%20Upgraded%20Linux%20Malware_641.png\"> <\/head> <body class=\"articlepage page basicpage context-business\" id=\"readabilityBody\" readability=\"50.783333333333\"> <!-- Page Scroll: Back to Top --> <a id=\"page-scroll\" title=\"VerticalPageScroll\" href=\"javascript:jumpScroll($(this).scrollTop());\"> <span class=\"icon-chevron-up\"><\/span> <\/a> <!-- \/* Data Layer *\/ --> <\/p>\n<div class=\"root responsivegrid\">\n<div class=\"aem-Grid aem-Grid--12 aem-Grid--default--12 \">\n<div class=\"articleBodyNoHero aem-GridColumn aem-GridColumn--default--12\">\n<div class=\"research-layout article container\" role=\"contentinfo\">\n<article class=\"research-layout--wrapper row\" data-article-pageid=\"1006857377\">\n<div class=\"col-xs-12 col-md-12 one-column\">\n<div class=\"col-xs-12 col-md-12\" readability=\"8.7476635514019\">\n<div class=\"article-details\" role=\"heading\" readability=\"36.934579439252\"> <span class=\"article-details__bar\" role=\"img\"><\/span> <\/p>\n<p class=\"article-details__display-tag\">Cloud<\/p>\n<p class=\"article-details__description\"> In this article, we discuss a new Linux malware trend in which malicious actors deploy code that removes applications and services present mainly in Huawei Cloud. <\/p>\n<p class=\"article-details__author-by\">By: Alfredo Oliveira, David Fiser <time class=\"article-details__date\">October 08, 2021<\/time> <span>Read time:&nbsp;<\/span><span class=\"eta\"><\/span> (<span class=\"words\"><\/span> words) <\/p>\n<\/p><\/div>\n<\/p><\/div>\n<\/p><\/div>\n<hr class=\"research-layout-divider\"> <main class=\"main--content col-xs-12 col-md-8 col-md-push-2\"> <\/p>\n<div class=\"richText\" readability=\"33.518848167539\">\n<div readability=\"16.529842931937\">\n<p>We have recently noticed another Linux threat evolution&nbsp;that targets relatively new cloud service providers (CSPs)&nbsp;with cryptocurrency-mining malware and&nbsp;cryptojacking&nbsp;attacks.&nbsp;In this article,&nbsp;we&nbsp;discuss a new Linux malware trend in which&nbsp;malicious&nbsp;actors deploy code that removes&nbsp;applications&nbsp;and&nbsp;services present mainly in&nbsp;Huawei&nbsp;Cloud.&nbsp;Specifically, the malicious code&nbsp;disables&nbsp;the&nbsp;<a href=\"https:\/\/support.huaweicloud.com\/intl\/en-us\/hss_faq\/hss_01_0245.html\">hostguard service<\/a>,&nbsp;a Huawei Cloud Linux agent process that \u201cdetects security issues, protects the system, and monitors the agent.\u201d&nbsp;The malicious code also includes&nbsp;<a href=\"https:\/\/github.com\/huaweicloud\/cloudresetpwdagent\">cloudResetPwdUpdateAgent<\/a>,&nbsp;an open-source&nbsp;plugin agent&nbsp;that allows Huawei Cloud users&nbsp;to reset a password to&nbsp;Elastic Cloud Service (ECS)&nbsp;instance,&nbsp;which is&nbsp;<a href=\"https:\/\/support.huaweicloud.com\/intl\/en-us\/usermanual-ecs\/en-us_topic_0068095385.html\">installed by default on public images<\/a>. As threat actors have these two services present in their shell scripts, we can assume that&nbsp;they are specifically targeting&nbsp;vulnerable&nbsp;ECS&nbsp;instances inside Huawei&nbsp;Cloud.&nbsp;&nbsp;<\/p>\n<\/p><\/div>\n<\/p><\/div>\n<div class=\"image\">\n<figure class=\"image-figure\"> <img decoding=\"async\" src=\"https:\/\/www.trendmicro.com\/content\/dam\/trendmicro\/global\/en\/research\/21\/j\/actors-target-huawei-cloud-using-upgraded-linux-malware\/Actors%20Target%20Huawei%20Cloud%20Using%20Upgraded%20Linux%20Malware_Fig1.jpg\" alt=\"Malicious code that disables hostguard and resets the password to ECS instance using the includes cloudResetPwdUpdateAgent plugin agent\"><figcaption>Figure 1. Malicious code that disables hostguard and resets the password to ECS instance using the includes cloudResetPwdUpdateAgent plugin agent<\/figcaption><\/figure>\n<\/p><\/div>\n<div>\n<div class=\"richText\" readability=\"38.398550724638\">\n<div readability=\"21.942028985507\">\n<p><span class=\"body-subhead-title\">Campaign&nbsp;evolution<\/span><\/p>\n<p>While&nbsp;researching&nbsp;this campaign,&nbsp;we&nbsp;stumbled&nbsp;upon older&nbsp;samples&nbsp;involved in a campaign&nbsp;that&nbsp;was&nbsp;previously discussed in a&nbsp;2020&nbsp;Tencent&nbsp;<a href=\"https:\/\/s.tencent.com\/research\/report\/1177.html\">blog<\/a>.&nbsp;The&nbsp;samples from that campaign&nbsp;were&nbsp;targeting&nbsp;container environments.&nbsp;There&nbsp;were two specific routines&nbsp;supporting this&nbsp;finding:&nbsp;the first one&nbsp;was&nbsp;that&nbsp;one of the payloads of this attack&nbsp;dropped&nbsp;a network scanner to&nbsp;map other hosts with ports commonly used&nbsp;as container APIs.&nbsp;The second&nbsp;was&nbsp;a function that created&nbsp;firewall rules to&nbsp;ensure&nbsp;that&nbsp;those container API&nbsp;ports are going to open.&nbsp;On&nbsp;the&nbsp;newer&nbsp;samples&nbsp;we\u2019ve found,&nbsp;the firewall&nbsp;rule creation&nbsp;is&nbsp;still&nbsp;present&nbsp;as a code&nbsp;that\u2019s&nbsp;left&nbsp;behind.&nbsp;However, it\u2019s been&nbsp;commented&nbsp;on,&nbsp;so&nbsp;no rule is created.&nbsp;We\u2019ve observed that the&nbsp;newer&nbsp;samples are&nbsp;only&nbsp;targeting&nbsp;cloud environments.&nbsp;<\/p>\n<p>Another interesting capability that we haven\u2019t seen before&nbsp;is&nbsp;that&nbsp;in this campaign, malicious&nbsp;actors&nbsp;have been&nbsp;searching&nbsp;for&nbsp;specific&nbsp;public keys&nbsp;that would allow&nbsp;them to&nbsp;kill off&nbsp;their&nbsp;competition&nbsp;from&nbsp;the infected system&nbsp;and&nbsp;update their own keys.&nbsp;More than any other samples&nbsp;and&nbsp;campaigns&nbsp;we\u2019ve seen so far,&nbsp;this&nbsp;campaign&nbsp;performs&nbsp;a&nbsp;comprehensive&nbsp;sanitization of the&nbsp;operation system.&nbsp;It looks&nbsp;for both signs&nbsp;of previous infections and for security tools that could stop its malicious&nbsp;routines. Not only that,&nbsp;but it also uses simple but effective commands to clean up&nbsp;after it&nbsp;performs its&nbsp;infection routine.<\/p>\n<\/p><\/div>\n<\/p><\/div>\n<div class=\"image\">\n<figure class=\"image-figure\"> <img decoding=\"async\" src=\"https:\/\/www.trendmicro.com\/content\/dam\/trendmicro\/global\/en\/research\/21\/j\/actors-target-huawei-cloud-using-upgraded-linux-malware\/Actors%20Target%20Huawei%20Cloud%20Using%20Upgraded%20Linux%20Malware_Fig2.png\" alt=\"Code showing SSH keys sanitization \"><figcaption>Figure 2. Code showing SSH keys sanitization <\/figcaption><\/figure>\n<\/p><\/div>\n<div class=\"richText\" readability=\"38\">\n<div readability=\"21\">\n<p>Most of the sourced samples follow the same routine of declaring several functions in no specific order.&nbsp;At the end of the file calling the functions,&nbsp;it follows a specific order: It performs initial connectivity checking,&nbsp;ensuring that outgoing connections are allowed,&nbsp;and&nbsp;checking if&nbsp;DNS servers are public (8.8.8.8 and 1.1.1.1). Such a routine is commonly done to make sure that when malicious URLs are requested, they will not be detected and that the domain translation denied by a Domain Name System (DNS) Security is implemented.&nbsp;<\/p>\n<p>Following the first connectivity check, the next set of functions are then called to prepare the system. It first removes any traces of infections made by competitors to avoid sharing computational resources. This kind of behavior was previously seen and documented, but this specific campaign goes beyond when it pertains to maintaining access in the infected system.<\/p>\n<\/p><\/div>\n<\/p><\/div>\n<div class=\"image\">\n<figure class=\"image-figure\"> <img decoding=\"async\" src=\"https:\/\/www.trendmicro.com\/content\/dam\/trendmicro\/global\/en\/research\/21\/j\/actors-target-huawei-cloud-using-upgraded-linux-malware\/Actors%20Target%20Huawei%20Cloud%20Using%20Upgraded%20Linux%20Malware_Fig3.png\" alt=\"The specific order of function that the campaign\u2019s routine follows in order to avoid detection \"><figcaption>Figure 3. The specific order of function that the campaign\u2019s routine follows in order to avoid detection <\/figcaption><\/figure>\n<\/p><\/div>\n<div class=\"richText\" readability=\"33\">\n<div readability=\"11\">\n<p>Upon&nbsp;further&nbsp;analysis of&nbsp;this campaign, we came across an&nbsp;interesting&nbsp;observation:&nbsp;the threat actors know&nbsp;their competitors&nbsp;well.&nbsp;They are aware of&nbsp;the users&nbsp;that&nbsp;their competitors&nbsp;use to maintain access.&nbsp;This is why&nbsp;they make sure to check&nbsp;and remove&nbsp;their competitors\u2019&nbsp;users&nbsp;first&nbsp;before creating their own users.&nbsp;&nbsp;<\/p>\n<\/p><\/div>\n<\/p><\/div>\n<div class=\"image\">\n<figure class=\"image-figure\"> <img decoding=\"async\" src=\"https:\/\/www.trendmicro.com\/content\/dam\/trendmicro\/global\/en\/research\/21\/j\/actors-target-huawei-cloud-using-upgraded-linux-malware\/Actors%20Target%20Huawei%20Cloud%20Using%20Upgraded%20Linux%20Malware_Fig4.png\" alt=\"Malicious actors check for and remove their competitors\u2019 users in the system \"><figcaption>Figure 4. Malicious actors check for and remove their competitors\u2019 users in the system <\/figcaption><\/figure>\n<\/p><\/div>\n<div class=\"richText\" readability=\"36.5\">\n<div readability=\"18\">\n<p>After&nbsp;removing&nbsp;unnecessary&nbsp;users&nbsp;from the system,&nbsp;the next step is creating&nbsp;several&nbsp;users of their own.&nbsp;This is&nbsp;another&nbsp;behavior&nbsp;that we&nbsp;have&nbsp;partially&nbsp;seen&nbsp;in&nbsp;other samples&nbsp;targeting cloud environments. The difference&nbsp;of this&nbsp;campaign, however, is that it&nbsp;creates&nbsp;a&nbsp;greater&nbsp;number of users&nbsp;using&nbsp;more&nbsp;generic, inconspicuous&nbsp;names&nbsp;such as&nbsp;\u201csystem\u201d&nbsp;and&nbsp;\u201clogger.\u201d Using usernames such as these can fool&nbsp;an&nbsp;inexperienced Linux&nbsp;analyst&nbsp;into thinking&nbsp;that these&nbsp;are&nbsp;legitimate&nbsp;users.&nbsp;<\/p>\n<p>Another&nbsp;unique&nbsp;behavior is that&nbsp;during the creation&nbsp;of the user, the script&nbsp;adds&nbsp;them&nbsp;to&nbsp;the&nbsp;sudoers&nbsp;list&nbsp;to give them&nbsp;administrative powers over the infected system.<\/p>\n<\/p><\/div>\n<\/p><\/div>\n<div class=\"image\">\n<figure class=\"image-figure\"> <img decoding=\"async\" src=\"https:\/\/www.trendmicro.com\/content\/dam\/trendmicro\/global\/en\/research\/21\/j\/actors-target-huawei-cloud-using-upgraded-linux-malware\/Actors%20Target%20Huawei%20Cloud%20Using%20Upgraded%20Linux%20Malware_Fig5.png\" alt=\"The malicious actors create generic users to avoid detection and add them to the sudoers list \"><figcaption>Figure 5. The malicious actors create generic users to avoid detection and add them to the sudoers list <\/figcaption><\/figure>\n<\/p><\/div>\n<div class=\"richText\" readability=\"33\">\n<div readability=\"11\">\n<p>The hacking team also adds&nbsp;their own&nbsp;ssh-rsa&nbsp;key to&nbsp;enable them to&nbsp;repeatedly&nbsp;log&nbsp;in&nbsp;to&nbsp;the infected system.&nbsp;After conducting&nbsp;system modifications,&nbsp;they add special permissions to&nbsp;prohibit&nbsp;further modifications&nbsp;from being applied to&nbsp;those files. This ensures that&nbsp;the&nbsp;malicious&nbsp;users that&nbsp;they&nbsp;created cannot be removed or modified.&nbsp;&nbsp;<\/p>\n<\/p><\/div>\n<\/p><\/div>\n<div class=\"image\">\n<figure class=\"image-figure\"> <img decoding=\"async\" src=\"https:\/\/www.trendmicro.com\/content\/dam\/trendmicro\/global\/en\/research\/21\/j\/actors-target-huawei-cloud-using-upgraded-linux-malware\/Actors%20Target%20Huawei%20Cloud%20Using%20Upgraded%20Linux%20Malware_Fig6.png\" alt=\"The malicious actors add their own ssh-rsa key to enable them to repeatedly log in on the infected system \"><figcaption>Figure 6. The malicious actors add their own ssh-rsa key to enable them to repeatedly log in on the infected system <\/figcaption><\/figure>\n<\/p><\/div>\n<div class=\"richText\" readability=\"32\">\n<div readability=\"9\">\n<p>Another&nbsp;interesting&nbsp;aspect of this campaign&nbsp;is&nbsp;that it installs&nbsp;The Onion Router&nbsp;(Tor)&nbsp;proxy&nbsp;service. This will be&nbsp;used&nbsp;later&nbsp;by the payloads&nbsp;to&nbsp;anonymize&nbsp;the malicious connections made by the&nbsp;malware.&nbsp;&nbsp;<\/p>\n<\/p><\/div>\n<\/p><\/div>\n<div class=\"image\">\n<figure class=\"image-figure\"> <img decoding=\"async\" src=\"https:\/\/www.trendmicro.com\/content\/dam\/trendmicro\/global\/en\/research\/21\/j\/actors-target-huawei-cloud-using-upgraded-linux-malware\/Actors%20Target%20Huawei%20Cloud%20Using%20Upgraded%20Linux%20Malware_Fig7.png\" alt=\"The campaign installs and uses the Tor proxy service to anonymize malicious connections \"> <\/figure>\n<\/p><\/div>\n<div class=\"image\">\n<figure class=\"image-figure\"> <img decoding=\"async\" src=\"https:\/\/www.trendmicro.com\/content\/dam\/trendmicro\/global\/en\/research\/21\/j\/actors-target-huawei-cloud-using-upgraded-linux-malware\/Actors%20Target%20Huawei%20Cloud%20Using%20Upgraded%20Linux%20Malware_Fig7b.png\" alt=\"The campaign installs and uses the Tor proxy service to anonymize malicious connections \"><figcaption>Figure 7. The campaign installs and uses the Tor proxy service to anonymize malicious connections <\/figcaption><\/figure>\n<\/p><\/div>\n<div class=\"richText\" readability=\"32.5\">\n<div readability=\"10\">\n<p><span class=\"body-subhead-title\">Campaign payloads and&nbsp;upgraded&nbsp;functionalities<\/span><\/p>\n<p>The script deploys two&nbsp;executable and linkable format (ELF)&nbsp;binaries&nbsp;\u2014&nbsp;linux64_shell&nbsp;and&nbsp;xlinux.<\/p>\n<\/p><\/div>\n<\/p><\/div>\n<div class=\"image\">\n<figure class=\"image-figure\"> <img decoding=\"async\" src=\"https:\/\/www.trendmicro.com\/content\/dam\/trendmicro\/global\/en\/research\/21\/j\/actors-target-huawei-cloud-using-upgraded-linux-malware\/Actors%20Target%20Huawei%20Cloud%20Using%20Upgraded%20Linux%20Malware_Fig8.png\" alt=\"A diagram that shows the malicious script deploying two ELF binaries, linux64_shell and xlinux \"><figcaption>Figure 8. A diagram that shows the malicious script deploying two ELF binaries, linux64_shell and xlinux <\/figcaption><\/figure>\n<\/p><\/div>\n<div class=\"richText\" readability=\"33\">\n<div readability=\"11\">\n<p><b>linux64_shell<\/b><\/p>\n<p>The binary itself is packed and obfuscated,&nbsp;the&nbsp;Ultimate Packer for Executables&nbsp;(UPX)&nbsp;packer&nbsp;has been used, but then the binary was tampered with in order to make&nbsp;the analysis harder and&nbsp;fooling&nbsp;some of the automated toolsets.<\/p>\n<\/p><\/div>\n<\/p><\/div>\n<div class=\"image\">\n<figure class=\"image-figure\"> <img decoding=\"async\" src=\"https:\/\/www.trendmicro.com\/content\/dam\/trendmicro\/global\/en\/research\/21\/j\/actors-target-huawei-cloud-using-upgraded-linux-malware\/Actors%20Target%20Huawei%20Cloud%20Using%20Upgraded%20Linux%20Malware_Fig9.png\" alt=\"UPX header present in the binary \"><figcaption>Figure 9. UPX header present in the binary <\/figcaption><\/figure>\n<\/p><\/div>\n<div class=\"richText\" readability=\"32\">\n<div readability=\"9\">\n<p>Upon&nbsp;closer look,&nbsp;we can see that another binary&nbsp;with extra data&nbsp;was appended&nbsp;to the&nbsp;file.&nbsp;&nbsp;<\/p>\n<\/p><\/div>\n<\/p><\/div>\n<div class=\"image\">\n<figure class=\"image-figure\"> <img decoding=\"async\" src=\"https:\/\/www.trendmicro.com\/content\/dam\/trendmicro\/global\/en\/research\/21\/j\/actors-target-huawei-cloud-using-upgraded-linux-malware\/Actors%20Target%20Huawei%20Cloud%20Using%20Upgraded%20Linux%20Malware_Fig10.png\" alt=\"Another binary appended to the file \"><figcaption>Figure 10. Another binary appended to the file <\/figcaption><\/figure>\n<\/p><\/div>\n<div class=\"richText\" readability=\"33.50622406639\">\n<div readability=\"12.811203319502\">\n<p>The appended binary is&nbsp;a&nbsp;compiled&nbsp;<a href=\"https:\/\/github.com\/gloxec\/CrossC2\/blob\/cs4.1\/protocol_demo\/c2profile.c\">CrossC2<\/a>&nbsp;communication&nbsp;library&nbsp;included&nbsp;to be able to interact directly with&nbsp;CobaltStrike\u2019s&nbsp;module using the following functions:<\/p>\n<ul>\n<li>&nbsp;<\/li>\n<li><span class=\"rte-red-bullet\">cc2_rebind_http_get_recv<\/span><\/li>\n<li>&nbsp;<\/li>\n<li><span class=\"rte-red-bullet\">cc2_rebind_http_post_send<\/span><\/li>\n<li>&nbsp;<\/li>\n<li><span class=\"rte-red-bullet\">cc2_rebind_post_protocol<\/span><\/li>\n<li>&nbsp;<\/li>\n<li><span class=\"rte-red-bullet\">cc2_rebind_http_get<\/span>_send<\/li>\n<\/ul>\n<p>After&nbsp;it is&nbsp;successfully&nbsp;unpacked, the&nbsp;executable&nbsp;continues&nbsp;with&nbsp;its&nbsp;control flow, which&nbsp;is designed&nbsp;to&nbsp;not be&nbsp;easily&nbsp;understood&nbsp;by an analyst&nbsp;and&nbsp;is&nbsp;full of conditional jumps.&nbsp;<\/p>\n<\/p><\/div>\n<\/p><\/div>\n<div class=\"image\">\n<figure class=\"image-figure\"> <img decoding=\"async\" src=\"https:\/\/www.trendmicro.com\/content\/dam\/trendmicro\/global\/en\/research\/21\/j\/actors-target-huawei-cloud-using-upgraded-linux-malware\/Actors%20Target%20Huawei%20Cloud%20Using%20Upgraded%20Linux%20Malware_Fig11.png\" alt=\"Obfuscated control flow full of (conditional) jumps \"><figcaption>Figure 11. Obfuscated control flow full of (conditional) jumps <\/figcaption><\/figure>\n<\/p><\/div>\n<div class=\"richText\" readability=\"35.189407540395\">\n<div readability=\"17.35368043088\">\n<p>At this point,&nbsp;the malware&nbsp;tries to connect to the C&amp;C&nbsp;with&nbsp;an&nbsp;IP address&nbsp;of&nbsp;45[.]76[.]220[.]46 on port 40443.&nbsp;&nbsp;This&nbsp;provides&nbsp;shell access to&nbsp;the attackers.<\/p>\n<p><b>xlinux<\/b><\/p>\n<p>The second binary is&nbsp;a Go-compiled binary&nbsp;implementing several modules from&nbsp;the&nbsp;<a href=\"https:\/\/github.com\/opensec-cn\/kunpeng\">kunpeng&nbsp;&nbsp;framework<\/a>.&nbsp;It&nbsp;acts as a&nbsp;vulnerability&nbsp;scanner,&nbsp;exploits&nbsp;weaknesses,&nbsp;and&nbsp;deploys&nbsp;the initial&nbsp;malicious&nbsp;script.<\/p>\n<p>1. The binary notifies&nbsp;malicious&nbsp;actors&nbsp;about&nbsp;the&nbsp;infected machine&nbsp;by sending&nbsp;an&nbsp;HTTP POST request to following URL&nbsp;103[.]209[.]103[.]16:26800\/api\/postip<\/p>\n<\/p><\/div>\n<\/p><\/div>\n<div class=\"image\">\n<figure class=\"image-figure\"> <img decoding=\"async\" src=\"https:\/\/www.trendmicro.com\/content\/dam\/trendmicro\/global\/en\/research\/21\/j\/actors-target-huawei-cloud-using-upgraded-linux-malware\/Actors%20Target%20Huawei%20Cloud%20Using%20Upgraded%20Linux%20Malware_Fig12a.png\" alt=\"The binary notifies malicious actors about the infected machine by sending an HTTP POST request to following URL 103[.]209[.]103[.]16:26800\/api\/postip \"> <\/figure>\n<\/p><\/div>\n<div class=\"richText\" readability=\"31\">\n<div readability=\"7\">\n<p>2. It&nbsp;copies itself&nbsp;into&nbsp;\/tmp\/iptablesupdate&nbsp;and&nbsp;drops&nbsp;a&nbsp;persistence script<\/p>\n<\/p><\/div>\n<\/p><\/div>\n<div class=\"image\">\n<figure class=\"image-figure\"> <img decoding=\"async\" src=\"https:\/\/www.trendmicro.com\/content\/dam\/trendmicro\/global\/en\/research\/21\/j\/actors-target-huawei-cloud-using-upgraded-linux-malware\/Actors%20Target%20Huawei%20Cloud%20Using%20Upgraded%20Linux%20Malware_Fig12b.png\" alt=\"Dropped script makes the Go binary persistent \"><figcaption>Figure 12. Dropped script makes the Go binary persistent <\/figcaption><\/figure>\n<\/p><\/div>\n<div class=\"richText\" readability=\"32\">\n<div readability=\"9\">\n<p>3. The binary begins with&nbsp;a&nbsp;\u201csecurity\u201d scan.&nbsp;Once&nbsp;a&nbsp;weakness is found,&nbsp;it&nbsp;exploits it and deploys&nbsp;its&nbsp;payload<\/p>\n<\/p><\/div>\n<\/p><\/div>\n<div class=\"image\">\n<figure class=\"image-figure\"> <img decoding=\"async\" src=\"https:\/\/www.trendmicro.com\/content\/dam\/trendmicro\/global\/en\/research\/21\/j\/actors-target-huawei-cloud-using-upgraded-linux-malware\/Actors%20Target%20Huawei%20Cloud%20Using%20Upgraded%20Linux%20Malware_Fig13.png\" alt=\"An example of an integrated exploit \"><figcaption>Figure 13. An example of an integrated exploit <\/figcaption><\/figure>\n<\/p><\/div>\n<div class=\"richText\" readability=\"47.68387553041\">\n<div readability=\"42.915487977369\">\n<p>An infected system is scanned for the following&nbsp;vulnerabilities and security&nbsp;weaknesses:<\/p>\n<ul>\n<li>&nbsp;<\/li>\n<li><span class=\"rte-red-bullet\">SSH weak passwords<\/span><\/li>\n<li>&nbsp;<\/li>\n<li><span class=\"rte-red-bullet\">Vulnerability in the Oracle WebLogic Server product of Oracle Fusion Middleware&nbsp;(CVE-2020-14882)<\/span><\/li>\n<li>&nbsp;<\/li>\n<li><span class=\"rte-red-bullet\">Redis unauthorized access&nbsp;or&nbsp;weak passwords<\/span><\/li>\n<li>&nbsp;<\/li>\n<li><span class=\"rte-red-bullet\">PostgreSQL&nbsp;unauthorized access or&nbsp;weak password<\/span><\/li>\n<li>&nbsp;<\/li>\n<li><span class=\"rte-red-bullet\">SQLServer&nbsp;weak password<\/span><\/li>\n<li>&nbsp;<\/li>\n<li><span class=\"rte-red-bullet\">MongoDB unauthorized access&nbsp;or&nbsp;weak password<\/span><\/li>\n<li>&nbsp;<\/li>\n<li><span class=\"rte-red-bullet\">File transfer protoco<\/span>l (FTP)&nbsp;weak password&nbsp;<\/li>\n<\/ul>\n<p><span class=\"body-subhead-title\">Conclusion<\/span><\/p>\n<p>Cryptocurrency miners are one of the&nbsp;<a href=\"https:\/\/www.trendmicro.com\/vinfo\/us\/security\/news\/cybercrime-and-digital-threats\/linux-threat-report-2021-1h-linux-threats-in-the-cloud-and-security-recommendations\">most deployed payloads in the Linux threat landscape<\/a>. In recent years, we have observed malicious actors such as&nbsp;<a href=\"https:\/\/www.trendmicro.com\/vinfo\/us\/security\/news\/cybercrime-and-digital-threats\/teamtnt-activities-probed\">TeamTNT<\/a>&nbsp;and&nbsp;<a href=\"https:\/\/www.trendmicro.com\/en_gb\/research\/20\/k\/analysis-of-kinsing-malwares-use-of-rootkit.html\">Kinsing<\/a>&nbsp;launch&nbsp;<a href=\"https:\/\/www.trendmicro.com\/vinfo\/ph\/security\/news\/cybercrime-and-digital-threats\/cryptojacking-gaining-traction-as-starbucks-and-streaming-users-targeted\">cryptojacking<\/a>&nbsp;campaigns and cryptocurrency mining malware that competes for the computing powers of infected resources.&nbsp;<\/p>\n<p>In 2020 and 2021 we have seen how these cybercriminal groups consistently targeted cloud environments and added cloud-centric features to their campaigns, including&nbsp;<a href=\"https:\/\/www.trendmicro.com\/en_us\/research\/21\/e\/teamtnt-extended-credential-harvester-targets-cloud-services-other-software.html\">credential harvesting<\/a>&nbsp;and the removal of cloud security services related to&nbsp;<a href=\"https:\/\/www.trendmicro.com\/en_ph\/research\/20\/k\/analysis-of-kinsing-malwares-use-of-rootkit.html\">Alibaba Cloud and Tencent Cloud<\/a>.&nbsp;&nbsp;<\/p>\n<p>Cloud&nbsp;service&nbsp;misconfigurations&nbsp;can allow&nbsp;cryptocurrency mining and&nbsp;cryptojacking&nbsp;attacks to&nbsp;happen.&nbsp;Most of the&nbsp;attacks&nbsp;that&nbsp;we\u2019ve monitored&nbsp;occurred&nbsp;because the services running on the cloud&nbsp;had&nbsp;an&nbsp;API&nbsp;or&nbsp;an&nbsp;SSH&nbsp;with weak&nbsp;credentials&nbsp;or&nbsp;had&nbsp;very&nbsp;permissive&nbsp;configurations,&nbsp;which&nbsp;attackers&nbsp;can abuse to enable them to infiltrate a system without needing to exploit&nbsp;any vulnerabilities. Misconfigurations&nbsp;are&nbsp;a&nbsp;common&nbsp;point of entry&nbsp;in&nbsp;such&nbsp;scenarios,&nbsp;and&nbsp;cloud users should give the same thought and attention to misconfigurations as they do&nbsp;to&nbsp;vulnerabilities and malware.&nbsp;<\/p>\n<p>Our team published several&nbsp;blogs and a&nbsp;research&nbsp;paper&nbsp;that shows&nbsp;how&nbsp;malicious&nbsp;actors&nbsp;targeted&nbsp;a specific cloud provider. In this blog,&nbsp;we have seen evidence of cybercriminals targeting&nbsp;other&nbsp;relatively newer&nbsp;CSPs&nbsp;like Huawei Cloud.&nbsp;Since&nbsp;attackers are&nbsp;also migrating to the cloud,&nbsp;the&nbsp;availability&nbsp;and scalability of resources&nbsp;are becoming even more precious&nbsp;since&nbsp;most of their&nbsp;attacks&nbsp;routinely&nbsp;deploy&nbsp;cryptojacking&nbsp;malware&nbsp;among other&nbsp;malicious routines.<\/p>\n<p>We have reached out to Huawei&nbsp;Media Team&nbsp;through their email address listed on their Contact Us page&nbsp;with our findings prior to the publication of this blog,&nbsp;and we are currently awaiting their&nbsp;acknowledgment or reply.&nbsp;<\/p>\n<p><span class=\"body-subhead-title\">Cloud security recommendations&nbsp;<\/span><\/p>\n<p>Malicious actors and hacking groups continue to upgrade their malware\u2019s capabilities to make the most of their attacks.&nbsp;To&nbsp;keep cloud environments secure,&nbsp;organizations must not rely solely on malware scanning and vulnerability checking tools.&nbsp;Checking&nbsp;and studying&nbsp;the responsibility model of&nbsp;their&nbsp;CSPs&nbsp;can&nbsp;help&nbsp;them&nbsp;define the best policies&nbsp;to put into place&nbsp;when publishing&nbsp;their cloud&nbsp;services.&nbsp;<\/p>\n<\/p><\/div>\n<\/p><\/div>\n<div class=\"richText\" readability=\"31\">\n<div readability=\"7\">\n<p><span class=\"body-subhead-title\">MITRE ATT&amp;CK Tactics and Techniques<\/span>&nbsp;<\/p>\n<\/p><\/div>\n<\/p><\/div>\n<div class=\"image\">\n<figure class=\"image-figure\"> <img decoding=\"async\" src=\"https:\/\/www.trendmicro.com\/content\/dam\/trendmicro\/global\/en\/research\/21\/j\/actors-target-huawei-cloud-using-upgraded-linux-malware\/MITRE.png\" alt=\"MITRE ATT&amp;CK Tactics and Techniques \"> <\/figure>\n<\/p><\/div>\n<div class=\"richText\">\n<div class=\"responsive-table-wrap\">\n<p><span class=\"body-subhead-title\">Indicators of compromise<\/span><\/p>\n<table border=\"1\">\n<tbody readability=\"11\">\n<tr>\n<td width=\"100\">SHA-256<\/td>\n<td>File&nbsp;<\/td>\n<td>Detection Names<\/td>\n<\/tr>\n<tr readability=\"4\">\n<td>3e38c51510f95643b04a9ba0f884a445f09372721073601abcbf8f12f663bf90&nbsp;<\/td>\n<td>fczyo<\/td>\n<td>Coinminer.Linux.XANTHE.B&nbsp;<\/td>\n<\/tr>\n<tr readability=\"2\">\n<td>6a5a0bcb60944597d61d5311a4590f1850c2ba7fc44bbcde4a81b2dd1effe57c<\/td>\n<td>fczyo&nbsp;<\/td>\n<td>Coinminer.Linux.XANTHE.A<\/td>\n<\/tr>\n<tr readability=\"2\">\n<td>71f578d122252c7fa67ca343cd29d65ac42d6f7c45bf91f146a1cd04b0446c23&nbsp;<\/td>\n<td>fczyo<\/td>\n<td>Coinminer.Linux.XANTHE.B<\/td>\n<\/tr>\n<tr readability=\"2\">\n<td>9849c66d8b6c444904259cda7f3e34ac2c60b00a945d3d5b911b5e290eb2888d&nbsp;<\/td>\n<td>fczyo<\/td>\n<td>Coinminer.Linux.XANTHE.B<\/td>\n<\/tr>\n<tr readability=\"4\">\n<td>d092b4cbf655d02ad8eae1a66db98e67cf95fa9e0b7c327c4bca33815696bf68&nbsp;<\/td>\n<td>ff.sh<\/td>\n<td>Trojan.SH.CVE20205902.B&nbsp;<\/td>\n<\/tr>\n<tr readability=\"4\">\n<td>e8503d6697c61c2c51ca90742b0634ce93710d6fdfb0965e35977e6cab4d039b<\/td>\n<td>xlinux&nbsp;<\/td>\n<td>Coinminer.Linux.PROCEAN.A<\/td>\n<\/tr>\n<tr readability=\"2\">\n<td>f36d3996245dba06af770d1faf3bc0615e1124fa179ecf2429162abd9df8bbf8&nbsp;<\/td>\n<td>Linux64-shell<\/td>\n<td>Trojan.Linux.COBEACON.A<\/td>\n<\/tr>\n<tr readability=\"2\">\n<td>fc614fb4bda24ae8ca2c44e812d12c0fab6dd7a097472a35dd12ded053ab8474<\/td>\n<td>ff.sh&nbsp;<\/td>\n<td>Trojan.SH.CVE20205902.B<\/td>\n<\/tr>\n<\/tbody>\n<\/table><\/div>\n<\/p><\/div>\n<div class=\"richText\" readability=\"32.5\">\n<div readability=\"10\">\n<p><b>Keys&nbsp;<\/b><\/p>\n<p>AAAAB3NzaC1yc2EAAAADAQABAAABAQDLVZNrAJ1uzR7d2bm1iUQPAgjuBlyLQQNaEHVmACWtGwwiOKMPiFBfBjuNJIyZFnGkkFgJP5fi8v1eqliaBgqERUDDtW\/RZDDIz8DovDrA4\/MGlxpCHLeViN+F62W\/jgeufiQ7NiPTlPB3Fuh7E7QXXpXqQ6EmVlV0iWdzqRvSiDIB3cIL6E2CrK47pY6Rp6rY2YKYzUhiZRqAMHViMR+2MARL2jERfF3CsG6ZXo\/7UVVx+tqoKQDHPmz21mrulOF6RW5hh04dE2q1+\/w6xmX8AxUSGmPdpwQa8GuV7NHHZmYO26ndTVi2ES472tJdkXVHmLX8B9Un42JLNVXwPU\/H linux@linux.com&#8221; &gt;&gt;\/opt\/autoupdater\/.ssh\/authorized_keys<\/p>\n<p><b>C&amp;C Servers<\/b><\/p>\n<ul>\n<li>&nbsp;<\/li>\n<li><span class=\"rte-red-bullet\">103[.]209[.]103[.]16<\/span><\/li>\n<li>&nbsp;<\/li>\n<li><span class=\"rte-red-bullet\">45[.]76[.]220[.<\/span>]46<\/li>\n<\/ul><\/div>\n<\/p><\/div>\n<\/p><\/div>\n<section class=\"tag--list\">\n<p>Tags<\/p>\n<\/section>\n<p> <\/main> <\/article>\n<\/div>\n<\/div><\/div>\n<\/div>\n<p> <!-- \/* Core functionality javascripts, absolute URL to leverage Akamai CDN *\/ --> <!--For Modal-start--> <\/p>\n<p> <span>sXpIBdPeKzI9PC2p0SWMpUSM2NSxWzPyXTMLlbXmYa0R20xk<\/span> <\/p>\n<p> <!--For Modal-end--> <!-- Go to www.addthis.com\/dashboard to customize your tools --> <\/body> Read More <a href=\"https:\/\/www.trendmicro.com\/en_us\/research\/21\/j\/actors-target-huawei-cloud-using-upgraded-linux-malware-.html\">HERE<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>In this article, we discuss a new Linux malware trend in which malicious actors deploy code that removes applications and services present mainly in Huawei Cloud. Read More HERE&#8230;<\/p>\n","protected":false},"author":2,"featured_media":43293,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"colormag_page_layout":"default_layout","footnotes":""},"categories":[61],"tags":[9510,9520,9513,9509],"class_list":["post-43292","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-trendmicro","tag-trend-micro-research-articles-news-reports","tag-trend-micro-research-cloud","tag-trend-micro-research-malware","tag-trend-micro-research-research"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.9 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Actors Target Huawei Cloud Using Upgraded Linux Malware Sr. Security Researcher Threat Researcher 2026 | ThreatsHub Cybersecurity News<\/title>\n<meta name=\"description\" content=\"ThreatsHub Cybersecurity News | ThreatsHub.org | Cloud Security &amp; Cyber Threats Analysis Hub. 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