Skip to content
NewA calmer, faster ZeroHour

Microsoft Exchange vulnerabilities exploited once again for ransomware, this time with Babuk

Cisco Talos ()12 min read3 · 1 read
Analyze this story with Vani AIImpact, who is affected and what defenders should do, in a new chat

Vulnerabilities mentioned

All
CVEVulnerabilityCVSSEPSSSignalsPublished
CVE-2021-36942
Unauthenticated LSA Spoofing (PetitPotam NTLM Relay) in Microsoft Windows
7.566%KEVRansomwarePoC
KEV

Indicators of compromise

auto-extracted · verify before use · export allAll
TypeIndicatorContext
domainctemplar.comEt4AKCre9MeiqtiR51Lvg2X8dXv1tP7nxLaEHKKQ Email IDs mitnickd@ctemplar[.]com zar8b@tuta[.]io Hashes Stage - 1 Downloader 47033d071e1c7
domainfbi.fund. The download server is hosted using the malicious domains fbi[.]fund and xxxs[.]info. The initial packed loader module contain
domainpastebin.plxxp://185[.]219[.]52[.]229:8080/vefEPjwOdNF9qNw.hta hxxps://pastebin[.]pl/view/raw/a57be2ca Mutex DoYouWantToHaveSexWithCuongDong W
domaintuta.io2X8dXv1tP7nxLaEHKKQ Email IDs mitnickd@ctemplar[.]com zar8b@tuta[.]io Hashes Stage - 1 Downloader 47033d071e1c79cc03f8b4081f5f6
domainxxxs.infoserver is hosted using the malicious domains fbi[.]fund and xxxs[.]info. The initial packed loader module contains encrypted .NET
ipv4168.119.93.163ns fbi[.]fund xxxs[.]info IP addresses 185[.]219[.]52[.]229 168[.]119[.]93[.]163 54[.]221[.]65[.]242 URLs hxxp://fbi.fund/tortillas/to
ipv4185.219.52.229According to Shodan, the download server at the IP address 185[.]219[.]52[.]229 is located in Moscow, Russia and runs OpenSSH and Pyt
ipv454.221.65.242info IP addresses 185[.]219[.]52[.]229 168[.]119[.]93[.]163 54[.]221[.]65[.]242 URLs hxxp://fbi.fund/tortillas/tortilla.exe hxxp://fb
sha121d354a27519dd62b328416bab01767da94786cbwhich we cannot verify. The thumbprint of the signature is:21D354A27519DD62B328416BAB01767DA94786CB. The same certificate is used by the actor to sign samples
sha25607fb7b42fe8d4a2125df459efd86de0f27b91b59d82b85b530c1e7c552c9e2351126e80ef078e29e10379722b49 Samples from previous campaigns 07fb7b42fe8d4a2125df459efd86de0f27b91b59d82b85b530c1e7c552c9e235 Most notable MITRE ATT&CK framework tactics and techniques
sha25608d799cc27063bc7969ae935ca171b518d0b41b1feaa9775bae06bd319291b41t Stage -2 Swrort variant containing the ransomware payload 08d799cc27063bc7969ae935ca171b518d0b41b1feaa9775bae06bd319291b41 5f35dbf807c844c790b9cffc9f83eca05d32f58b737ba638c9567b8d221
sha2560994c1fc7f66f88eead2091f31a2137f69d08c3cf9ee0f4a15a842f54253c9d94c85e241efbbe326051999b9a8e1d8eeb9a3322da5cb9a93c31c65bbb49 0994c1fc7f66f88eead2091f31a2137f69d08c3cf9ee0f4a15a842f54253c9d9 Payload bd26b65807026a70909d38c48f2a9e0f8730b1126e80ef078e2
sha2561d28c4c85e241efbbe326051999b9a8e1d8eeb9a3322da5cb9a93c31c65bbb49bf807c844c790b9cffc9f83eca05d32f58b737ba638c9567b8d22119f96 1d28c4c85e241efbbe326051999b9a8e1d8eeb9a3322da5cb9a93c31c65bbb49 0994c1fc7f66f88eead2091f31a2137f69d08c3cf9ee0f4a15a842f5425
sha25647033d071e1c79cc03f8b4081f5f6d470d45e32a90b06ee96bfe6c3df2f47d40@ctemplar[.]com zar8b@tuta[.]io Hashes Stage - 1 Downloader 47033d071e1c79cc03f8b4081f5f6d470d45e32a90b06ee96bfe6c3df2f47d40 - DLL downloader 56b7e6dd46e38a30ead82790947a425661ad893f54
sha25656b7e6dd46e38a30ead82790947a425661ad893f54060381c9b76616c27d3b9f081f5f6d470d45e32a90b06ee96bfe6c3df2f47d40 - DLL downloader 56b7e6dd46e38a30ead82790947a425661ad893f54060381c9b76616c27d3b9f - DLL downloader 752d66990097c8be7760d8d6011b1e91daa1d55189
sha2565f35dbf807c844c790b9cffc9f83eca05d32f58b737ba638c9567b8d22119f969cc27063bc7969ae935ca171b518d0b41b1feaa9775bae06bd319291b41 5f35dbf807c844c790b9cffc9f83eca05d32f58b737ba638c9567b8d22119f96 1d28c4c85e241efbbe326051999b9a8e1d8eeb9a3322da5cb9a93c31c65
sha256752d66990097c8be7760d8d6011b1e91daa1d5518951d86f9fdf3d126d54872a90947a425661ad893f54060381c9b76616c27d3b9f - DLL downloader 752d66990097c8be7760d8d6011b1e91daa1d5518951d86f9fdf3d126d54872a - EfsPotato variant Stage -2 Swrort variant containing the
sha256bd26b65807026a70909d38c48f2a9e0f8730b1126e80ef078e29e10379722b4988eead2091f31a2137f69d08c3cf9ee0f4a15a842f54253c9d9 Payload bd26b65807026a70909d38c48f2a9e0f8730b1126e80ef078e29e10379722b49 Samples from previous campaigns 07fb7b42fe8d4a2125df459efd8
urlhttp://185.219.52.229:8080/vefEPjwOdNF9qNw.htatortillas/tore.exe hxxp://185[.]219[.]52[.]229/tortilla.exe hxxp://185[.]219[.]52[.]229:8080/vefEPjwOdNF9qNw.hta hxxps://pastebin[.]pl/view/raw/a57be2ca Mutex DoYouWa
urlhttp://185.219.52.229/tortilla.exetortilla.exe hxxp://185[.]219[.]52[.]229/tortillas/tore.exe hxxp://185[.]219[.]52[.]229/tortilla.exe hxxp://185[.]219[.]52[.]229:8080/vefEPjwOdNF9qNw.hta
urlhttp://185.219.52.229/tortillas/tore.exetore.exe hxxp://185[.]219[.]52[.]229/tortillas/tortilla.exe hxxp://185[.]219[.]52[.]229/tortillas/tore.exe hxxp://185[.]219[.]52[.]229/tortilla.exe hxxp://185[.
urlhttp://185.219.52.229/tortillas/tortilla.exe://fbi[.]fund/dark.exe hxxp://fbi[.]fund/tortillas/tore.exe hxxp://185[.]219[.]52[.]229/tortillas/tortilla.exe hxxp://185[.]219[.]52[.]229/tortillas/tore.exe hxxp:/
urlhttp://fbi.fund/dark.exePowerShell command to download the next stage's loader from hxxp://fbi[.]fund/dark.exe, which is the main packed module containing the final pay
urlhttp://fbi.fund/tortillas/nvokes a web request to connect to the malicious repository hxxp://fbi[.]fund/tortillas/ using the Invoke-WebRequest commandlet and certutil.exe t
urlhttp://fbi.fund/tortillas/tore.exe/fbi.fund/tortillas/tortilla.exe hxxp://fbi[.]fund/dark.exe hxxp://fbi[.]fund/tortillas/tore.exe hxxp://185[.]219[.]52[.]229/tortillas/tortilla.exe hxxp:/
urlhttp://fbi.fund/tortillas/tortilla.exe19[.]52[.]229 168[.]119[.]93[.]163 54[.]221[.]65[.]242 URLs hxxp://fbi.fund/tortillas/tortilla.exe hxxp://fbi[.]fund/dark.exe hxxp://fbi[.]fund/tortillas/tore
urlhttps://pastebin.pl/view/raw/a57be2cala.exe hxxp://185[.]219[.]52[.]229:8080/vefEPjwOdNF9qNw.hta hxxps://pastebin[.]pl/view/raw/a57be2ca Mutex DoYouWantToHaveSexWithCuongDong Wallet 46zdZVRjm9XJ

From the original article

12 min read at blog.talosintelligence.com

By Chetan Raghuprasad and Vanja Svajcer , with contributions from Caitlin Huey . Cisco Talos recently discovered a malicious campaign deploying variants of the Babuk ransomware predominantly affecting users in the U. S.

Cisco Talos

blog.talosintelligence.com

Read the full article at Cisco Talos

A short excerpt; the article and its images belong to the publisher. Summary, key facts and assessment above are AI-written from the article and can be wrong.