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MALPEDIA_Win_Theme_Forest_Rat_Auto

autogenerated rule brought to you by yara-signator

MalwareTheme Forest RatMalpedia signator rulesCreative Commons Attribution-ShareAlike 4.0Compiles with YARA-X
Author
Felix Bilstein - yara-signator at cocacoding dot com
Date
2026-05-04
Modified
2026-05-18
Score / Quality
75 / 75

What this rule detects

autogenerated rule brought to you by yara-signator

Associated malware family: Theme Forest Rat.

It defines 10 patterns (0 text, 10 hex, 0 regex).

Summary generated from the rule's metadata and condition.

Rule source

win-theme-forest-rat-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Theme_Forest_Rat_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "2dfda398-f2e0-5044-aa0d-96a802a77678"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.theme_forest_rat"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.theme_forest_rat_auto.yar#L1-L131"
		license_url = "N/A"
		logic_hash = "1f9b18271343c20c0a3cb56f23f6a9c9adf0d77b95c33d44db6f3d949d45d1a5"
		score = 75
		quality = 75
		tags = "FILE"
		version = "1"
		tool = "yara-signator v0.6.0"
		signator_config = "callsandjumps;datarefs;binvalue"
		malpedia_rule_date = "20260422"
		malpedia_hash = "a182e35da64e6d71cb55f125c4d4225196523f14"
		malpedia_version = "20260504"
		malpedia_license = "CC BY-SA 4.0"
		malpedia_sharing = "TLP:WHITE"

	strings:
		$sequence_0 = { 488bcb ff15???????? 83a56006000000 4c8d8568060000 48c7c702000080 c7855806000064000000 }
		$sequence_1 = { 7575 488d442440 c7860824000001000000 488bd6 488d4c2440 482bd0 0fb701 }
		$sequence_2 = { 488b4c2460 488d442468 4889442428 41b901000000 4533c0 c744242001000000 ba00000002 }
		$sequence_3 = { 56 57 4156 4883ec40 8b6934 488bfa 8b5130 }
		$sequence_4 = { 488958e0 488958d8 8958d0 488958c8 4183c9ff 4c8bc1 33d2 }
		$sequence_5 = { e8???????? 85c0 0f85be030000 4885f6 488d2d51170300 480f45ee }
		$sequence_6 = { 490f43d4 4883c118 e8???????? 4d3bf4 ba08000000 661bc0 66f7d0 }
		$sequence_7 = { 8918 c7400416100010 c7400801000000 89bd24a80000 488d8d1ca80000 e8???????? 488bcd }
		$sequence_8 = { 4883ec28 4c8b01 498bc0 48f7d0 483bc2 720f }
		$sequence_9 = { 03d0 8bc5 8d0c92 03c9 498d5710 2bc1 4863c8 }

	condition:
		7 of them and filesize < 651264
}

Strings (10 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ 488bcb ff15???????? 83a56006000000 4c8d8568060000 48c7c702000080 c7855806000064000000 }
$sequence_1hex{ 7575 488d442440 c7860824000001000000 488bd6 488d4c2440 482bd0 0fb701 }
$sequence_2hex{ 488b4c2460 488d442468 4889442428 41b901000000 4533c0 c744242001000000 ba00000002 }
$sequence_3hex{ 56 57 4156 4883ec40 8b6934 488bfa 8b5130 }
$sequence_4hex{ 488958e0 488958d8 8958d0 488958c8 4183c9ff 4c8bc1 33d2 }
$sequence_5hex{ e8???????? 85c0 0f85be030000 4885f6 488d2d51170300 480f45ee }
$sequence_6hex{ 490f43d4 4883c118 e8???????? 4d3bf4 ba08000000 661bc0 66f7d0 }
$sequence_7hex{ 8918 c7400416100010 c7400801000000 89bd24a80000 488d8d1ca80000 e8???????? 488bcd }
$sequence_8hex{ 4883ec28 4c8b01 498bc0 48f7d0 483bc2 720f }
$sequence_9hex{ 03d0 8bc5 8d0c92 03c9 498d5710 2bc1 4863c8 }

Condition

7 of them and filesize < 651264

In plain words (Heuristic)

  • The file must be smaller than 651264 (a cheap guard that skips large files).
  • At least 7 patterns in the rule must match.

Test this rule in your browser

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References

Licence & attribution

Author: Felix Bilstein - yara-signator at cocacoding dot com

Source repository: Malpedia signator rules @ c901f97b7d

Licence: Creative Commons Attribution-ShareAlike 4.0 (repository licence)

Original rule

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

Rule id: 2dfda398-f2e0-5044-aa0d-96a802a77678

Metadata

version1
toolyara-signator v0.6.0
signator_configcallsandjumps;datarefs;binvalue
malpedia_rule_date20260422
malpedia_hasha182e35da64e6d71cb55f125c4d4225196523f14
malpedia_version20260504
malpedia_licenseCC BY-SA 4.0
malpedia_sharingTLP:WHITE

Tags:FILE