MAL_RANSOM_LockBit_Indicators_Feb24_RID3362

YARA detection rule by Florian Roth · CC-BY-NC https://creativecommons.org/licenses/by-nc/4.0/

Detects Lockbit ransomware samples mentioned in a HuntressLabs report on the exploitation of ScreenConnect vulnerability CVE-2024-1708 and CVE-2024-1709

import "pe"
rule MAL_RANSOM_LockBit_Indicators_Feb24_RID3362 : CRIME CVE_2024_1708 CVE_2024_1709 DEMO EXE LockBit MAL RANSOM {
   meta:
      description = "Detects Lockbit ransomware samples mentioned in a HuntressLabs report on the exploitation of ScreenConnect vulnerability CVE-2024-1708 and CVE-2024-1709"
      author = "Florian Roth"
      reference = "https://www.huntress.com/blog/slashandgrab-screen-connect-post-exploitation-in-the-wild-cve-2024-1709-cve-2024-1708"
      date = "2024-02-23 14:45:31"
      score = 75
      customer = "demo"
      license = "CC-BY-NC https://creativecommons.org/licenses/by-nc/4.0/"
      hash1 = "a50d9954c0a50e5804065a8165b18571048160200249766bfa2f75d03c8cb6d0"
      tags = "CRIME, CVE_2024_1708, CVE_2024_1709, DEMO, EXE, LockBit, MAL, RANSOM"
      required_modules = "pe"
      minimum_yara = "3.5.0"
      
   strings:
      $op1 = { 76 c1 95 8b 18 00 93 56 bf 2b 88 71 4c 34 af b1 a5 e9 77 46 c3 13 } 
      $op2 = { e0 02 10 f7 ac 75 0e 18 1b c2 c1 98 ac 46 } 
      $op3 = { 8b c6 ab 53 ff 15 e4 57 42 00 ff 45 fc eb 92 ff 75 f8 ff 15 f4 57 42 00 } 
   condition: 
      uint16 ( 0 ) == 0x5a4d and filesize < 500KB and ( pe.imphash ( ) == "914685b69f2ac2ff61b6b0f1883a054d" or 2 of them ) or all of them
}

[[ currentRule.title && currentRule.title.length > 60 ? currentRule.title.slice(0, 60) + '…' : currentRule.title ]]

942dcc4f-715e-4c86-bd0f-b8d724566544

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Executable code, not a declarative rule

This submission is arbitrary [[ currentRule.format ? currentRule.format.toUpperCase() : '' ]] code, not a declarative detection rule — review it as you would any script before running it, and note that it cannot be safely aggregated or auto-executed alongside YARA/Sigma/Suricata/CRS rules.

Rejected pattern present

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