{"id":10072,"date":"2017-10-25T12:17:09","date_gmt":"2017-10-25T20:17:09","guid":{"rendered":"http:\/\/www.palada.net\/index.php\/2017\/10\/25\/news-3845\/"},"modified":"2017-10-25T12:17:09","modified_gmt":"2017-10-25T20:17:09","slug":"news-3845","status":"publish","type":"post","link":"http:\/\/www.palada.net\/index.php\/2017\/10\/25\/news-3845\/","title":{"rendered":"Another Ransomware Outbreak! This time it\u2019s Bad Rabbit"},"content":{"rendered":"

Credit to Author: Quick Heal Security Labs| Date: Wed, 25 Oct 2017 08:46:53 +0000<\/strong><\/p>\n

The recent Bad Rabbit ransomware outbreak is currently making headlines. This post outlines the analysis of the ransomware by Quick Heal Security Labs. According to our telemetry, we have not seen any Bad Rabbit ransomware infection on our customer\u2019s machines so far. Propagation technique Bad Rabbit is distributed via a drive-by-download attack from the below URL hxxp:\/\/1dnscontrol[.]com\/flash_install.php The payload is pretending to be a bogus Adobe Flash Player update named as \u201cinstall_flash_player.exe\u201d. The ransomware escalates itself to the administrative privilege using UAC prompt. Further, it drops \u2018C:Windowsinfpub.dat\u2019 which is actually a DLL file executed through \u2018rundll32.exe\u2019 as seen in the execution flow below. Execution flow Fig 1. Execution flow Dropped artifacts\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Bad Rabbit ransomware drops multiple artifacts which are named after the dragons in the popular TV series called Game of Thrones. C:Windowsinfpub.dat C:WindowsSystem32Tasksdrogon C:WindowsSystem32Tasksrhaegal C:Windowscscc.dat C:Windowsdispci.exe Below is the screenshot of the code from the ransomware to use \u2018rundll32.exe\u2019 to execute \u2018infpub.dat\u2019. Fig 2. Infpub.dat creation code snippet The \u2018infpub.dat\u2019 drops a malicious executable \u2018dispci.exe\u2019 at \u2018C:Windows\u2019 which is responsible for Disk Encryption. The \u2018infpub.dat\u2019 creates two tasks with names \u2018drogon\u2019 which is used to force restart the system and \u2018rhaegal\u2019 which is used to start a program at startup. Fig 3. Drogon task properties   Fig 4: Rhaegal task properties Infpub.dat is also responsible for file encryption using a shared public RSA-2048 key of the attacker for the list of file extensions as seen below. Fig 5. RSA Key and file extensions The dropped file \u2018dispci.exe\u2019 uses version information from a genuine DiskCryptor utility which is responsible for MBR infection which stops the boot-up process of the affected system until the ransom is paid as shown in the image below. Fig 6. Ransom note How it spreads in the network The \u2018infpub.dat\u2019 tries to brute-forces login credentials using hard-coded credentials and also uses Mimikatz module to extract NTLM credentials from the system memory. These credentials are used to access other network workstations and server on the same network via SMB and WebDAV. Fig 7. SMB share enumeration Fig 8: SMB login \u2013 Brute force Similarities between Bad Rabbit ransomware and NotPetya ransomware Drops DLL files in Windows folder with \u2018.dat\u2019 extension and executes it using \u2018rundll32.exe\u2019 with ordinal 1 (#1). Use of \u2018MimiKatz\u2019 module for extraction of NTLM credentials Uses schedule task to restart system using \u2018shutdown.exe\u2019 Displays a similar ransom note after MBR infection Uses WMI and SMB for spreading across network Although both the ransomware share quite a lot of similarities, Bad Rabbit is not a wiper. Indicators of compromise SHA256 Filename 630325cac09ac3fab908f903e3b00d0dadd5fdaa0875ed8496fcbb97a558d0da install_flash_player.exe 8ebc97e05c8e1073bda2efb6f4d00ad7e789260afa2c276f0c72740b838a0a93 dispci.exe 579fd8a0385482fb4c789561a30b09f25671e86422f40ef5cca2036b28f99648 infpub.dat Malicious URLs http:\/\/1dnscontrol[.]com http:\/\/1dnscontrol[.]com\/flash_install.php Quick Heal Detection How to stay safe Never download software from pop-up ads or websites that don’t belong to the software vendor (in this case \u2013 Adobe). Never click on links or download attachments that arrive in emails from unwanted, unknown or unexpected sources. Apply all recommended security updates for Operating System and programs like Adobe, JAVA, Web browsers, etc. Take regular backups of your important data in secure online and offline locations. Use a layered security software and keep it updated.   Subject Matter Experts Anita Ladkat, Shantanu Vichare, Prashil Moon, Shriram Munde, Prakash Galande | Quick Heal Security Labs   The post Another Ransomware Outbreak! This time it\u2019s Bad Rabbit appeared first on Quick Heal Technologies Security Blog | Latest computer security news, tips, and advice.
http:\/\/blogs.quickheal.com\/feed\/<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

Credit to Author: Quick Heal Security Labs| Date: Wed, 25 Oct 2017 08:46:53 +0000<\/strong><\/p>\n

The recent Bad Rabbit ransomware outbreak is currently making headlines. This post outlines the analysis of the ransomware by Quick Heal Security Labs. According to our telemetry, we have not seen any Bad Rabbit ransomware infection on our customer\u2019s machines so far. Propagation technique Bad Rabbit is distributed via a…<\/p>\n

The post Another Ransomware Outbreak! This time it\u2019s Bad Rabbit<\/a> appeared first on Quick Heal Technologies Security Blog | Latest computer security news, tips, and advice<\/a>.<\/p>\n","protected":false},"author":4,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"colormag_page_container_layout":"default_layout","colormag_page_sidebar_layout":"default_layout","footnotes":""},"categories":[10459,10378],"tags":[16097,16098,3765],"class_list":["post-10072","post","type-post","status-publish","format-standard","hentry","category-quickheal","category-security","tag-adobe-installer","tag-bad-rabbit-ransomware","tag-ransomware"],"_links":{"self":[{"href":"http:\/\/www.palada.net\/index.php\/wp-json\/wp\/v2\/posts\/10072","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/www.palada.net\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.palada.net\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.palada.net\/index.php\/wp-json\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"http:\/\/www.palada.net\/index.php\/wp-json\/wp\/v2\/comments?post=10072"}],"version-history":[{"count":0,"href":"http:\/\/www.palada.net\/index.php\/wp-json\/wp\/v2\/posts\/10072\/revisions"}],"wp:attachment":[{"href":"http:\/\/www.palada.net\/index.php\/wp-json\/wp\/v2\/media?parent=10072"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.palada.net\/index.php\/wp-json\/wp\/v2\/categories?post=10072"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.palada.net\/index.php\/wp-json\/wp\/v2\/tags?post=10072"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}