YARA · Mandiant red team tool countermeasures

FIREEYE_RT_APT_Downloader_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: 2020-11-27
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 (1 text, 1 hex, 0 regex).

Summary generated from the rule's metadata and condition.

Rule source

Download .yar

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

rule FIREEYE_RT_APT_Downloader_Win64_REDFLARE_1 : FILE
{
	meta:
		description = "No description has been set in the source file - FireEye-RT"
		author = "FireEye"
		id = "15a5e22b-84b0-5b36-8772-1d496ac447b2"
		date = "2020-11-27"
		date = "2020-11-27"
		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_Downloader_Win64_REDFLARE_1.yar#L4-L17"
		license_url = "https://github.com/mandiant/red_team_tool_countermeasures//blob/3561b71724dbfa3e2bb78106aaa2d7f8b892c43b/LICENSE.txt"
		hash = "9529c4c9773392893a8a0ab8ce8f8ce1"
		logic_hash = "1b9bece6083403615841c752eac48fd20095e918d6e175563dd122be2885d875"
		score = 75
		quality = 75
		tags = "FILE"
		rev = 2

	strings:
		$const = "Cookie: SID1=%s" fullword
		$http_req = { 00 00 08 80 81 3D [4] BB 01 00 00 75 [1-10] 00 00 80 00 [1-4] 00 10 00 00 [1-4] 00 20 00 00 89 [6-20] 00 00 00 00 [6-20] 00 00 00 00 [2-10] 00 00 00 00 45 33 C9 [4-20] 48 8D 15 [4] 48 8B 0D [4] FF 15 [4-50] B9 14 00 00 00 E8 }

	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
$const	text	"Cookie: SID1=%s"	fullword
$http_req	hex	{ 00 00 08 80 81 3D [4] BB 01 00 00 75 [1-10] 00 00 80 00 [1-4] 00 10 00 00 [1-4] 00 20 00 00 89 [6-20] 00 00 00 00 [6-20] 00 00 00 00 [2-10] 00 00 00 00 45 33 …

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).

9529c4c9773392893a8a0ab8ce8f8ce1

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: 15a5e22b-84b0-5b36-8772-1d496ac447b2

Metadata

rev	2

Tags:FILE

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