Created
July 14, 2022 17:20
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rule SiennaBlue | |
{ | |
meta: | |
author = "Microsoft Threat Intelligence Center (MSTIC)" | |
description = "Detects Golang package, function, and source file names observed in DEV-0530 Ransomware SiennaBlue samples" | |
hash1 = "f8fc2445a9814ca8cf48a979bff7f182d6538f4d1ff438cf259268e8b4b76f86" | |
hash2 = "541825cb652606c2ea12fd25a842a8b3456d025841c3a7f563655ef77bb67219" | |
strings: | |
$holylocker_s1 = "C:/Users/user/Downloads/development/src/HolyLocker/Main/HolyLock/locker.go" | |
$holylocker_s2 = "HolyLocker/Main.EncryptionExtension" | |
$holylocker_s3 = "HolyLocker/Main.ContactEmail" | |
$holylocker_s4 = "HolyLocker/communication.(*Client).GetPubkeyFromServer" | |
$holylocker_s5 = "HolyLocker/communication.(*Client).AddNewKeyPairToIntranet" | |
$holyrs_s1 = "C:/Users/user/Downloads/development/src/HolyGhostProject/MainFunc/HolyRS/HolyRS.go" | |
$holyrs_s2 = "HolyGhostProject/MainFunc.ContactEmail" | |
$holyrs_s3 = "HolyGhostProject/MainFunc.EncryptionExtension" | |
$holyrs_s4 = "HolyGhostProject/Network.(*Client).GetPubkeyFromServer" | |
$holyrs_s5 = "HolyGhostProject/Network.(*Client).AddNewKeyPairToIntranet" | |
$s1 = "Our site : <b><a href=%s>H0lyGh0stWebsite" | |
$s2 = ".h0lyenc" | |
$go_prefix = "Go build ID:" | |
condition: | |
uint16(0) == 0x5A4D and uint32(uint32(0x3C)) == 0x00004550 and | |
filesize < 7MB and filesize > 1MB and | |
$go_prefix and all of ($s*) and (all of ($holylocker_*) or all of ($holyrs_*)) | |
} | |
rule SiennaPurple | |
{ | |
meta: | |
author = "Microsoft Threat Intelligence Center (MSTIC)" | |
description = "Detects PDB path, C2, and ransom note in DEV-0530 Ransomware SiennaPurple samples" | |
hash = "99fc54786a72f32fd44c7391c2171ca31e72ca52725c68e2dde94d04c286fccd" | |
strings: | |
$s1 = "ForOP\\attack(utils)\\attack tools\\Backdoor\\powershell\\btlc_C\\Release\\btlc_C.pdb" | |
$s2 = "matmq3z3hiovia3voe2tix2x54sghc3tszj74xgdy4tqtypoycszqzqd.onion" | |
$s3 = "H0lyGh0st@mail2tor.com" | |
$s4 = "We are <HolyGhost>. All your important files are stored and encrypted." | |
$s5 = "aic^ef^bi^abc0" | |
$s6 = "---------------------------3819074751749789153841466081" | |
condition: | |
uint16(0) == 0x5A4D and uint32(uint32(0x3C)) == 0x00004550 and | |
filesize < 7MB and filesize > 1MB and | |
all of ($s*) | |
} |
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