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YARA · Mandiant red team tool countermeasures

FIREEYE_RT_APT_Backdoor_Win_GORAT_5

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
2020-12-02
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 8 patterns (8 text, 0 hex, 0 regex).

Summary generated from the rule's metadata and condition.

Rule source

Download .yar
apt-backdoor-win-gorat-5.yarBSD 2-Clause License
rule FIREEYE_RT_APT_Backdoor_Win_GORAT_5 : FILE
{
	meta:
		description = "No description has been set in the source file - FireEye-RT"
		author = "FireEye"
		id = "73102bd2-7b94-5c7b-b9a4-cfc9cf5e3212"
		date = "2020-12-02"
		date = "2020-12-02"
		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 (Gorat)/production/yara/APT_Backdoor_Win_GORAT_5.yar#L4-L23"
		license_url = "https://github.com/mandiant/red_team_tool_countermeasures//blob/3561b71724dbfa3e2bb78106aaa2d7f8b892c43b/LICENSE.txt"
		hash = "cdf58a48757010d9891c62940c439adb, a107850eb20a4bb3cc59dbd6861eaf0f"
		logic_hash = "67f85fb3bedfd18a1226c92318f387be3c7ff9566ca2d554c49cf62389482552"
		score = 75
		quality = 75
		tags = "FILE"
		rev = 1

	strings:
		$1 = "comms.BeaconData" fullword
		$2 = "comms.CommandResponse" fullword
		$3 = "rat.BaseChannel" fullword
		$4 = "rat.Config" fullword
		$5 = "rat.Core" fullword
		$6 = "platforms.AgentPlatform" fullword
		$7 = "GetHostID" fullword
		$8 = "/rat/cmd/gorat_shared/dllmain.go" fullword

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

Strings (8 patterns)

IdentifierTypeValueModifiers
$1text"comms.BeaconData"fullword
$2text"comms.CommandResponse"fullword
$3text"rat.BaseChannel"fullword
$4text"rat.Config"fullword
$5text"rat.Core"fullword
$6text"platforms.AgentPlatform"fullword
$7text"GetHostID"fullword
$8text"/rat/cmd/gorat_shared/dllmain.go"fullword

Condition

( uint16( 0 ) == 0x5A4D ) and ( uint32( uint32( 0x3C ) ) == 0x00004550 ) 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

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: 73102bd2-7b94-5c7b-b9a4-cfc9cf5e3212

Metadata

rev1

Tags:FILE

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