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YARA · CAPE Sandbox (CAPEv2)

CAPE_Carbanak

Carnbanak Payload

MalwareCarbanakCAPE Sandbox (CAPEv2)GNU General Public License v3.0Compiles with YARA-X
Author
enzok
Date
2023-11-30
Modified
2024-03-18
Score / Quality
75 / 70

What this rule detects

Carnbanak Payload

Associated malware family: Carbanak.

Targets: Windows PE.

It defines 3 patterns (0 text, 3 hex, 0 regex).

Summary generated from the rule's metadata and condition.

Rule source

Download .yar
carbanak.yarGNU General Public License v3.0
rule CAPE_Carbanak : FILE
{
	meta:
		description = "Carnbanak Payload"
		author = "enzok"
		id = "e6d395d5-65ba-5efb-bcbc-c6d56a96f0c1"
		date = "2023-11-30"
		modified = "2024-03-18"
		reference = "https://github.com/kevoreilly/CAPEv2"
		source_url = "https://github.com/kevoreilly/CAPEv2/blob/6b15e76f28cd83fd1187da6c9aaaad2174255356/data/yara/CAPE/Carbanak.yar#L1-L14"
		license_url = "https://github.com/kevoreilly/CAPEv2/blob/6b15e76f28cd83fd1187da6c9aaaad2174255356/LICENSE"
		hash = "c9c1b06cb9c9bd6fc4451f5e2847a1f9524bb2870d7bb6f0ee09b9dd4e3e4c84"
		logic_hash = "8ed5ab07f1635dc7cdf296e86a71a0a99d0b2faef8fc460f43d426b24b8c8367"
		score = 75
		quality = 70
		tags = "FILE"
		cape_type = "Carbanak Payload"

	strings:
		$sboxinit = {0F BE 02 4? 8D 05 [-] 4? 8D 4D ?? E8 [3] 00 33 F6 4? 8D 5D ?? 4? 63 F8 8B 45 ?? B? B1 E3 14 06}
		$decode_string = {0F BE 03 FF C9 83 F8 20 7D ?? B? 1F [3] 4? 8D 4A E2 EB ?? 3D 80 [3] 7D ?? B? 7F [3] 4? 8D 4A A1 EB ?? B? FF [3] 4? 8D 4A 81}
		$constants = {0F B7 05 [3] 00 0F B7 1D [3] 00 83 25 [3] 00 00 89 05 [3] 00 0F B7 05 [3] 00 89 1D [3] 00 89 05 [3] 00 33 C0 4? 8D 4D}

	condition:
		uint16( 0 ) == 0x5A4D and 2 of them
}

Strings (3 patterns)

IdentifierTypeValueModifiers
$sboxinithex{0F BE 02 4? 8D 05 [-] 4? 8D 4D ?? E8 [3] 00 33 F6 4? 8D 5D ?? 4? 63 F8 8B 45 ?? B? B1 E3 14 06}
$decode_stringhex{0F BE 03 FF C9 83 F8 20 7D ?? B? 1F [3] 4? 8D 4A E2 EB ?? 3D 80 [3] 7D ?? B? 7F [3] 4? 8D 4A A1 EB ?? B? FF [3] 4? 8D 4A 81}
$constantshex{0F B7 05 [3] 00 0F B7 1D [3] 00 83 25 [3] 00 00 89 05 [3] 00 0F B7 05 [3] 00 89 1D [3] 00 89 05 [3] 00 33 C0 4? 8D 4D}

Condition

uint16( 0 ) == 0x5A4D and 2 of them

In plain words (Heuristic)

  • The file must start with “MZ” — a Windows executable (PE).
  • At least 2 patterns in the rule must match.

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References

Sample hashes

Hashes of samples the author lists in the rule's meta (look them up in your threat-intelligence platform).

  • c9c1b06cb9c9bd6fc4451f5e2847a1f9524bb2870d7bb6f0ee09b9dd4e3e4c84

Licence & attribution

Author: enzok

Source repository: CAPE Sandbox (CAPEv2) @ 6b15e76f28

Licence: GNU General Public License v3.0 (repository licence)

Copyright notice: Cuckoo Sandbox is copyrighted by the Cuckoo Foundation.

Original rule

Mirrored via YARA Forge 20260927, which prefixes rule names with the source and adds normalised meta fields.

Rule id: e6d395d5-65ba-5efb-bcbc-c6d56a96f0c1

Metadata

cape_typeCarbanak Payload

Tags:FILE

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