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YARA · CAPE Sandbox (CAPEv2)

CAPE_Themida

Themida Packer

Suspicious / huntingCAPE Sandbox (CAPEv2)GNU General Public License v3.0Compiles with YARA-X
Author
kevoreilly
Date
2024-09-11
Score / Quality
75 / 70

What this rule detects

Themida Packer

Targets: Windows PE.

It defines 1 patterns (0 text, 1 hex, 0 regex).

Summary generated from the rule's metadata and condition.

Rule source

Download .yar
themida.yarGNU General Public License v3.0
rule CAPE_Themida : FILE
{
	meta:
		description = "Themida Packer"
		author = "kevoreilly"
		id = "cd5c8b08-4864-57f7-b218-1bcb6892bea8"
		date = "2024-09-11"
		modified = "2024-09-11"
		reference = "https://github.com/kevoreilly/CAPEv2"
		source_url = "https://github.com/kevoreilly/CAPEv2/blob/6b15e76f28cd83fd1187da6c9aaaad2174255356/data/yara/binaries/Themida.yar#L1-L11"
		license_url = "https://github.com/kevoreilly/CAPEv2/blob/6b15e76f28cd83fd1187da6c9aaaad2174255356/LICENSE"
		logic_hash = "c4f1e01a3fe3cb66062ce03253bfe9edc09dc6f1a77db99b281106e8ceff9257"
		score = 75
		quality = 70
		tags = "FILE"
		packed = "6337ff4cf413f56cc6c9a8e67f24b8d7f94f620eae06ac9f0b113b5ba82ea176"

	strings:
		$code = {FC 31 C9 49 89 CA 31 C0 31 DB AC 30 C8 88 E9 88 D5 88 F2 B6 08 66 D1 EB 66 D1 D8 73 09}

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

Strings (1 patterns)

IdentifierTypeValueModifiers
$codehex{FC 31 C9 49 89 CA 31 C0 31 DB AC 30 C8 88 E9 88 D5 88 F2 B6 08 66 D1 EB 66 D1 D8 73 09}

Condition

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

In plain words (Heuristic)

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

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References

Licence & attribution

Author: kevoreilly

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: cd5c8b08-4864-57f7-b218-1bcb6892bea8

Metadata

packed6337ff4cf413f56cc6c9a8e67f24b8d7f94f620eae06ac9f0b113b5ba82ea176

Tags:FILE

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