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YARA · CAPE Sandbox (CAPEv2)

CAPE_Amatera

Amatera Payload

GenericCAPE Sandbox (CAPEv2)GNU General Public License v3.0Compiles with YARA-X
Author
kevoreilly
Date
2025-06-19
Score / Quality
75 / 70

What this rule detects

Amatera Payload

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
amatera.yarGNU General Public License v3.0
rule CAPE_Amatera : FILE
{
	meta:
		description = "Amatera Payload"
		author = "kevoreilly"
		id = "0d58a054-8636-58d8-99b9-26560aa6c187"
		date = "2025-06-19"
		modified = "2025-06-19"
		reference = "https://github.com/kevoreilly/CAPEv2"
		source_url = "https://github.com/kevoreilly/CAPEv2/blob/6b15e76f28cd83fd1187da6c9aaaad2174255356/data/yara/CAPE/Amatera.yar#L1-L14"
		license_url = "https://github.com/kevoreilly/CAPEv2/blob/6b15e76f28cd83fd1187da6c9aaaad2174255356/LICENSE"
		hash = "35eb93548a0c037d392f870c05e0e9fb1aeff3a5a505e1d4a087f7465ed1f6af"
		logic_hash = "1c02f04846568b85acbd4101b2e944dc824179f7cff1bceaec1c657939b610d5"
		score = 75
		quality = 70
		tags = "FILE"
		cape_type = "Amatera Payload"

	strings:
		$sysenter = {64 FF 15 C0 00 00 00 C3}
		$harness = {0F B7 55 EC 52 E8 [4] 83 C4 04 C7 45 F0 [4] 8B 45 ?? 50 [0-40] FF 55 F0 83 C4 ?? 8B E5 5D C3}
		$socket = {66 89 [2] 6A 00 6A ?? 8D [3] 68 (03|07) 20 01 00 8B 4D F8 E8 [4] 0F B6 (C0|C8) 85 (C0|C9) 75 04 32 C0 EB}

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

Strings (3 patterns)

IdentifierTypeValueModifiers
$sysenterhex{64 FF 15 C0 00 00 00 C3}
$harnesshex{0F B7 55 EC 52 E8 [4] 83 C4 04 C7 45 F0 [4] 8B 45 ?? 50 [0-40] FF 55 F0 83 C4 ?? 8B E5 5D C3}
$sockethex{66 89 [2] 6A 00 6A ?? 8D [3] 68 (03|07) 20 01 00 8B 4D F8 E8 [4] 0F B6 (C0|C8) 85 (C0|C9) 75 04 32 C0 EB}

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

Sample hashes

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

  • 35eb93548a0c037d392f870c05e0e9fb1aeff3a5a505e1d4a087f7465ed1f6af

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: 0d58a054-8636-58d8-99b9-26560aa6c187

Metadata

cape_typeAmatera Payload

Tags:FILE

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