Skip to content
yararules.org
Menu

YARA · Mandiant red team tool countermeasures

FIREEYE_RT_APT_Loader_Win32_PGF_2

base dlls: /lib/payload/techniques/dllmain/

APT / threat actorMandiant red team tool countermeasuresBSD 2-Clause LicenseCompiles with YARA-X
Author
FireEye
Date
2020-11-25
Modified
2020-12-09
Score / Quality
75 / 75

What this rule detects

base dlls: /lib/payload/techniques/dllmain/

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
apt-loader-win32-pgf-2.yarBSD 2-Clause License
rule FIREEYE_RT_APT_Loader_Win32_PGF_2 : FILE
{
	meta:
		description = "base dlls: /lib/payload/techniques/dllmain/"
		author = "FireEye"
		id = "e11a626b-ce91-5f6c-a514-9a8a02a29cbd"
		date = "2020-11-25"
		date = "2020-11-25"
		modified = "2020-12-09"
		reference = "https://github.com/mandiant/red_team_tool_countermeasures/"
		source_url = "https://github.com/mandiant/red_team_tool_countermeasures//blob/3561b71724dbfa3e2bb78106aaa2d7f8b892c43b/rules/PGF/production/yara/APT_Loader_Win32_PGF_2.yar#L4-L19"
		license_url = "https://github.com/mandiant/red_team_tool_countermeasures//blob/3561b71724dbfa3e2bb78106aaa2d7f8b892c43b/LICENSE.txt"
		hash = "04eb45f8546e052fe348fda2425b058c"
		logic_hash = "d69f3f31c4964fe933295563e08bdbb36abadd6611541b9ffa55b6829ced1d21"
		score = 75
		quality = 75
		tags = "FILE"
		rev = 1

	strings:
		$sb1 = { 6A ?? FF 15 [4-16] 8A ?? 04 [0-16] 8B ?? 1C [0-64] 0F 10 ?? 66 0F EF C8 0F 11 [0-32] 30 [2] 8D [2] 4? 83 [2] 7? }
		$sb2 = { 8B ?? 08 [0-16] 6A 40 68 00 30 00 00 5? 6A 00 [0-32] FF 15 [4-32] 5? [0-16] E8 [4-64] C1 ?? 04 [0-32] 8A [2] 3? [2] 4? 3? ?? 24 ?? 7? }
		$sb3 = { 8B ?? 3C [0-16] 03 [1-64] 0F B? ?? 14 [0-32] 83 ?? 18 [0-32] 66 3? ?? 06 [4-32] 68 [4] 5? FF 15 [4-16] 85 C0 [2-32] 83 ?? 28 0F B? ?? 06 }

	condition:
		( uint16( 0 ) == 0x5A4D ) and ( uint32( uint32( 0x3C ) ) == 0x00004550 ) and ( uint16( uint32( 0x3C ) + 0x18 ) == 0x010B ) and all of them
}

Strings (3 patterns)

IdentifierTypeValueModifiers
$sb1hex{ 6A ?? FF 15 [4-16] 8A ?? 04 [0-16] 8B ?? 1C [0-64] 0F 10 ?? 66 0F EF C8 0F 11 [0-32] 30 [2] 8D [2] 4? 83 [2] 7? }
$sb2hex{ 8B ?? 08 [0-16] 6A 40 68 00 30 00 00 5? 6A 00 [0-32] FF 15 [4-32] 5? [0-16] E8 [4-64] C1 ?? 04 [0-32] 8A [2] 3? [2] 4? 3? ?? 24 ?? 7? }
$sb3hex{ 8B ?? 3C [0-16] 03 [1-64] 0F B? ?? 14 [0-32] 83 ?? 18 [0-32] 66 3? ?? 06 [4-32] 68 [4] 5? FF 15 [4-16] 85 C0 [2-32] 83 ?? 28 0F B? ?? 06 }

Condition

( uint16( 0 ) == 0x5A4D ) and ( uint32( uint32( 0x3C ) ) == 0x00004550 ) and ( uint16( uint32( 0x3C ) + 0x18 ) == 0x010B ) 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.

Test this rule in your browser

Drop a file to scan it with this rule using YARA-X compiled to WebAssembly. Nothing is uploaded.

Drop a file here or click to chooseScanned locally with YARA-X. Files up to 200 MB.

Open in editor

References

Sample hashes

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

  • 04eb45f8546e052fe348fda2425b058c

Licence & attribution

Author: FireEye

Source repository: Mandiant red team tool countermeasures @ 3561b71724

Licence: BSD 2-Clause License (repository licence)

Copyright notice: Copyright (c) 2023, MANDIANT

Original rule

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

Rule id: e11a626b-ce91-5f6c-a514-9a8a02a29cbd

Metadata

rev1

Tags:FILE

Related rules