{"id":34083,"date":"2020-03-28T15:12:42","date_gmt":"2020-03-28T15:12:42","guid":{"rendered":"https:\/\/packetstormsecurity.com\/news\/view\/31069\/Mysterious-Hacker-Group-Eavesdrops-On-Corporate-Email-And-FTP-Traffic.html"},"modified":"2020-03-28T15:12:42","modified_gmt":"2020-03-28T15:12:42","slug":"mysterious-hacker-group-eavesdrops-on-corporate-email-and-ftp-traffic","status":"publish","type":"post","link":"https:\/\/www.threatshub.org\/blog\/mysterious-hacker-group-eavesdrops-on-corporate-email-and-ftp-traffic\/","title":{"rendered":"Mysterious Hacker Group Eavesdrops On Corporate Email And FTP Traffic"},"content":{"rendered":"<p><span class=\"img aspect-set\"><img decoding=\"async\" src=\"https:\/\/zdnet1.cbsistatic.com\/hub\/i\/2020\/03\/27\/3fcf40f1-ae0a-4ac5-8e3d-77830ff8f660\/draytek-vigor.png\" class alt=\"DrayTek Vigor\"><\/span><span class=\"credit\">Image: DrayTek, ZDNet<\/span> <\/p>\n<p>Since at least early December 2019, a mysterious hacker group has been taking over DrayTek enterprise routers to eavesdrop on FTP and email traffic inside corporate networks, Chinese security firm Qihoo 360 said today.<\/p>\n<p>In a <a href=\"https:\/\/blog.netlab.360.com\/two-zero-days-are-targeting-draytek-broadband-cpe-devices-en\/\" target=\"_blank\" rel=\"noopener noreferrer nofollow\" data-component=\"externalLink\">report<\/a> published on the blog of its network security division Netlab, Qihoo said its researchers detected two different threat actors, each exploiting a different zero-day vulnerability in DrayTek Vigor &#8212; load-balancing routers and VPN gateways typically deployed on enterprise networks.<\/p>\n<h3>Attack Group A &#8212; stealing FTP and email traffic<\/h3>\n<p>Of the two hacker groups, the first &#8212; identified only as &#8220;Attack Group A&#8221; &#8212; appears to be, by far, the more sophisticated of the two.<\/p>\n<p>According to Qihoo, the group popped up on their radar on December 4, last year, when they detected a pretty complex attack on DrayTek devices.<\/p>\n<p>Qihoo says Attack Group A abused a vulnerability in the RSA-encrypted login mechanism of DrayTek devices to hide malicious code inside the router&#8217;s username login field.<\/p>\n<p>When a DrayTek router received and then decrypted the boobytrapped RSA-encrypted login data, it ran the malicious code and granted the hackers control over the router.<\/p>\n<p>But here&#8217;s where things got weird. Instead of abusing the device to launch DDoS attacks or re-route traffic as part of a proxy network, the hackers turned into a spy-box.<\/p>\n<section class=\"sharethrough-top\" data-component=\"medusaContentRecommendation\" data-medusa-content-recommendation-options=\"{&quot;promo&quot;:&quot;promo_zd_recommendation_sharethrough_top_in_article_desktop&quot;,&quot;spot&quot;:&quot;dfp-in-article&quot;}\">\n<\/section>\n<p>Researchers say the hackers deployed a script that recorded traffic coming over port 21 (FTP &#8211; file transfer), port 25 (SMTP &#8211; email), port 110 (POP3 &#8211; email), and port 143 (IMAP &#8211; email).<\/p>\n<p>Then, on every Monday, Wednesday, and Friday at 0:00, the script would upload all the recorded traffic to a remote server.<\/p>\n<p>Qihoo researchers didn&#8217;t speculate why hackers were collecting FTP and email traffic. But speaking to ZDNet over the phone, a security researcher pointed out that this looked like a classic reconnaissance operation.<\/p>\n<p>&#8220;All four protocols are cleartext. It&#8217;s obvious they&#8217;re logging traffic to collect login credentials for FTP and email accounts,&#8221; the researcher told ZDNet. &#8220;Those creds are flying unencrypted over the network. They&#8217;re easy pickings.&#8221;<\/p>\n<p><em>***The researcher didn&#8217;t want his name shared for this article as he was not authorized to speak to the press without his employer&#8217;s PR department approval.<\/em><\/p>\n<p>Furthermore, ZDNet also understands from another industry source that the group&#8217;s hacking campaign has not gone unnoticed and has been kept under observation by other cyber-security firms. However, Attack Group A doesn&#8217;t share any server infrastructure or malware samples with any other known hacking group &#8212; so this, for now, appears to be a new group.<\/p>\n<h3>Attack Group B &#8212; creating backdoor accounts<br \/><\/h3>\n<p>But DrayTek devices have also been abused by a second group, which Qihoo codenamed &#8220;Attack Group B.&#8221;<\/p>\n<p>This group used a different zero-day, but the hackers didn&#8217;t discover it themselves. Instead, the zero-day was first described in <a href=\"https:\/\/www.skullarmy.net\/2020\/01\/draytek-unauthenticated-rce-in-draytek.html\" target=\"_blank\" rel=\"noopener noreferrer nofollow\" data-component=\"externalLink\">a January 26 post on the Skull Army blog<\/a>, and the hackers began exploiting it two days later.<\/p>\n<p>Per Qihoo, the hackers used this second zero-day to execute code on vulnerable DrayTek devices by exploiting a bug in the &#8220;rtick&#8221; process to create backdoor accounts on the hacked routers. What they did with those accounts remains unknown.<\/p>\n<h3>Patches released in February<\/h3>\n<p>Qihoo said its researchers notified DrayTek about both zero-days once they detected attacks; however, their first alert was sent through an incorrect channel and was never seen by DrayTek&#8217;s staff.<\/p>\n<p>The vendor did eventually learned of the two zero-days after Group B&#8217;s attacks in January and <a href=\"https:\/\/www.draytek.com\/about\/security-advisory\/vigor3900-\/-vigor2960-\/-vigor300b-router-web-management-page-vulnerability-(cve-2020-8515)\/\" target=\"_blank\" rel=\"noopener noreferrer nofollow\" data-component=\"externalLink\">released firmware patches<\/a> on February 10. DrayTek even went out of its way to release a firmware patch for a now-discontinued router model.<\/p>\n<p>According to Qihoo, attacks have been observed against <a href=\"https:\/\/www.draytek.com\/products\/vigor2960\/\" target=\"_blank\" rel=\"noopener noreferrer nofollow\" data-component=\"externalLink\">DrayTek Vigor 2960<\/a>, <a href=\"https:\/\/www.draytek.com\/products\/vigor3900\/\" target=\"_blank\" rel=\"noopener noreferrer nofollow\" data-component=\"externalLink\">3900<\/a>, and <a href=\"https:\/\/www.draytek.com\/products\/vigor300B\/\" target=\"_blank\" rel=\"noopener noreferrer nofollow\" data-component=\"externalLink\">300B<\/a>.<\/p>\n<p>Using the BinaryEdge search engine, ZDNet was able to find more than 978,000 DrayTek Vigor devices on the internet, although, Qihoo says that <a href=\"https:\/\/twitter.com\/360Netlab\/status\/1209763610525757443\" target=\"_blank\" rel=\"noopener noreferrer\" data-component=\"externalLink\">only around 100,000<\/a> of these are running a firmware version that&#8217;s vulnerable to attacks.<\/p>\n<p><span class=\"img aspect-set\"><img decoding=\"async\" src=\"https:\/\/www.zdnet.com\/article\/a-mysterious-hacker-group-is-eavesdropping-on-corporate-ftp-and-email-traffic\/\" class=\"lazy\" alt=\"draytek-vigor-be.png\" data-original=\" https:\/\/zdnet4.cbsistatic.com\/hub\/i\/2020\/03\/28\/bcaa9fcb-6456-4c28-9f4e-5a5f57138603\/draytek-vigor-be.png\"><\/span><noscript><\/p>\n<p><span class=\"img aspect-set\"><img decoding=\"async\" src=\"https:\/\/zdnet4.cbsistatic.com\/hub\/i\/2020\/03\/28\/bcaa9fcb-6456-4c28-9f4e-5a5f57138603\/draytek-vigor-be.png\" class alt=\"draytek-vigor-be.png\"><\/span><\/p>\n<p><\/noscript> READ MORE <a href=\"https:\/\/packetstormsecurity.com\/news\/view\/31069\/Mysterious-Hacker-Group-Eavesdrops-On-Corporate-Email-And-FTP-Traffic.html\">HERE<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>READ MORE HERE&#8230;<\/p>\n","protected":false},"author":2,"featured_media":34084,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"colormag_page_layout":"default_layout","footnotes":""},"categories":[277],"tags":[8538],"class_list":["post-34083","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-cybersecurity-blogs","tag-headlinehackerprivacyemaildata-lossspyware"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.6 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Mysterious Hacker Group Eavesdrops On Corporate Email And FTP Traffic 2026 | ThreatsHub Cybersecurity News<\/title>\n<meta name=\"description\" content=\"ThreatsHub Cybersecurity News | ThreatsHub.org | Cloud Security &amp; Cyber Threats Analysis Hub. 100% Free OSINT Threat Intelligent and Cybersecurity News.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, 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