MAL_Trojan_DLL_Nov23

rule MAL_Trojan_DLL_Nov23 {
   meta:
      author = "X__Junior"
      description = "Detects a trojan DLL that installs other components - was seen being used by LockBit 3.0 affiliates exploiting CVE-2023-4966"
      reference = "https://www.cisa.gov/news-events/cybersecurity-advisories/aa23-325a"
      date = "2023-11-23"
      hash1 = "e557e1440e394537cca71ed3d61372106c3c70eb6ef9f07521768f23a0974068"
      score = 80
      id = "1dd87d0a-2b8b-5386-8fdd-40d184c731a4"
   strings:
      $op1 = { C7 84 24 ?? ?? ?? ?? 52 70 63 53 C7 84 24 ?? ?? ?? ?? 74 72 69 6E C7 84 24 ?? ?? ?? ?? 67 42 69 6E C7 84 24 ?? ?? ?? ?? 64 69 6E 67 C7 84 24 ?? ?? ?? ?? 43 6F 6D 70 C7 84 24 ?? ?? ?? ?? 6F 73 65 41 C7 84 24 ?? ?? ?? ?? 00 40 01 01 }
      $op2 = { C7 84 24 ?? ?? ?? ?? 6C 73 61 73 C7 84 24 ?? ?? ?? ?? 73 70 69 72 66 C7 84 24 ?? ?? 00 00 70 63 }
      $op3 = { C7 84 24 ?? ?? ?? ?? 4E 64 72 43 C7 84 24 ?? ?? ?? ?? 6C 69 65 6E C7 84 24 ?? ?? ?? ?? 74 43 61 6C C7 84 24 ?? ?? ?? ?? 6C 33 00 8D }
   condition:
      uint16(0) == 0x5a4d and all of them
}