YARA · Mandiant red team tool countermeasures

FIREEYE_RT_APT_Loader_Win64_PGF_1

base dlls: /lib/payload/techniques/unmanaged_exports/

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/unmanaged_exports/

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-win64-pgf-1.yarBSD 2-Clause License

rule FIREEYE_RT_APT_Loader_Win64_PGF_1 : FILE
{
	meta:
		description = "base dlls: /lib/payload/techniques/unmanaged_exports/"
		author = "FireEye"
		id = "1f2280c0-0fdd-5930-947a-931274bccd6f"
		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_Win64_PGF_1.yar#L4-L19"
		license_url = "https://github.com/mandiant/red_team_tool_countermeasures//blob/3561b71724dbfa3e2bb78106aaa2d7f8b892c43b/LICENSE.txt"
		hash = "2b686a8b83f8e1d8b455976ae70dab6e"
		logic_hash = "2e84d614c34b0b7f93fa70fa3312f22e3ff23f2abd33b2e19c00dd6cba7dcfdc"
		score = 75
		quality = 75
		tags = "FILE"
		rev = 1

	strings:
		$sb1 = { B9 14 00 00 00 FF 15 [4-32] 0F B6 ?? 04 [0-32] F3 A4 [0-64] 0F B6 [2-3] 0F B6 [2-3] 33 [0-32] 88 [1-9] EB }
		$sb2 = { 41 B8 00 30 00 00 [0-32] FF 15 [8-64] 83 ?? 01 [4-80] 0F B6 [1-64] 33 [1-32] 88 [1-64] FF ( D? | 5? ) }
		$sb3 = { 48 89 4C 24 08 [4-64] 48 63 48 3C [0-32] 48 03 C1 [0-64] 0F B7 48 14 [0-64] 48 8D 44 08 18 [8-64] 0F B7 40 06 [2-32] 48 6B C0 28 }

	condition:
		( uint16( 0 ) == 0x5A4D ) and ( uint32( uint32( 0x3C ) ) == 0x00004550 ) and ( uint16( uint32( 0x3C ) + 0x18 ) == 0x020B ) and all of them
}

Strings (3 patterns)

Identifier	Type	Value
$sb1	hex	{ B9 14 00 00 00 FF 15 [4-32] 0F B6 ?? 04 [0-32] F3 A4 [0-64] 0F B6 [2-3] 0F B6 [2-3] 33 [0-32] 88 [1-9] EB }
$sb2	hex	{ 41 B8 00 30 00 00 [0-32] FF 15 [8-64] 83 ?? 01 [4-80] 0F B6 [1-64] 33 [1-32] 88 [1-64] FF ( D? \| 5? ) }
$sb3	hex	{ 48 89 4C 24 08 [4-64] 48 63 48 3C [0-32] 48 03 C1 [0-64] 0F B7 48 14 [0-64] 48 8D 44 08 18 [8-64] 0F B7 40 06 [2-32] 48 6B C0 28 }

Condition

( uint16( 0 ) == 0x5A4D ) and ( uint32( uint32( 0x3C ) ) == 0x00004550 ) and ( uint16( uint32( 0x3C ) + 0x18 ) == 0x020B ) 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

https://github.com/mandiant/red_team_tool_countermeasures/

Sample hashes

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

2b686a8b83f8e1d8b455976ae70dab6e

Licence & attribution

Author: FireEye

Source repository: Mandiant red team tool countermeasures @ 3561b71724

Licence: BSD 2-Clause License (repository licence)

Original rule

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

Rule id: 1f2280c0-0fdd-5930-947a-931274bccd6f

Metadata

rev	1

Tags:FILE

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