YARA · Mandiant red team tool countermeasures

FIREEYE_RT_APT_Keylogger_Win64_REDFLARE_1

No description has been set in the source file - FireEye-RT

APT / threat actorMandiant red team tool countermeasuresBSD 2-Clause LicenseCompiles with YARA-X

Author: FireEye
Date: 2020-12-01
Modified: 2020-12-09
Score / Quality: 75 / 75

What this rule detects

No description has been set in the source file - FireEye-RT

Targets: Windows PE.

It defines 2 patterns (0 text, 2 hex, 0 regex).

Summary generated from the rule's metadata and condition.

Rule source

Download .yar

apt-keylogger-win64-redflare-1.yarBSD 2-Clause License

rule FIREEYE_RT_APT_Keylogger_Win64_REDFLARE_1 : FILE
{
	meta:
		description = "No description has been set in the source file - FireEye-RT"
		author = "FireEye"
		id = "3c980f5a-c775-5c25-ba28-91a93a1b9a85"
		date = "2020-12-01"
		date = "2020-12-01"
		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/REDFLARE/production/yara/APT_Keylogger_Win64_REDFLARE_1.yar#L4-L17"
		license_url = "https://github.com/mandiant/red_team_tool_countermeasures//blob/3561b71724dbfa3e2bb78106aaa2d7f8b892c43b/LICENSE.txt"
		hash = "fbefb4074f1672a3c29c1a47595ea261"
		logic_hash = "26fe577ba637c484d9a8ccc2173b5892a76328a90a39a2bebbae6bd2a6329485"
		score = 75
		quality = 75
		tags = "FILE"
		rev = 1

	strings:
		$create_window = { 41 B9 00 00 CF 00 [4-40] 33 C9 [2-10] 00 00 00 80 [2-10] 00 00 00 80 [2-10] 00 00 00 80 [2-10] 00 00 00 80 FF 15 }
		$keys_check = { B9 14 00 00 00 FF 15 [4-8] B9 10 00 00 00 FF 15 [4] BE 00 80 FF FF 66 85 C6 75 ?? B9 A0 00 00 00 FF 15 [4] 66 85 C6 75 ?? B9 A1 00 00 00 FF 15 [4] 66 85 C6 74 }

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

Strings (2 patterns)

Identifier	Type	Value	Modifiers
$create_window	hex	{ 41 B9 00 00 CF 00 [4-40] 33 C9 [2-10] 00 00 00 80 [2-10] 00 00 00 80 [2-10] 00 00 00 80 [2-10] 00 00 00 80 FF 15 }
$keys_check	hex	{ B9 14 00 00 00 FF 15 [4-8] B9 10 00 00 00 FF 15 [4] BE 00 80 FF FF 66 85 C6 75 ?? B9 A0 00 00 00 FF 15 [4] 66 85 C6 75 ?? B9 A1 00 00 00 FF 15 [4] 66 85 C6 74 …

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).

fbefb4074f1672a3c29c1a47595ea261

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: 3c980f5a-c775-5c25-ba28-91a93a1b9a85

Metadata

rev	1

Tags:FILE

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