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MALPEDIA_Win_Unidentified_037_Auto

autogenerated rule brought to you by yara-signator

MalwareMalpedia 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

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

Summary generated from the rule's metadata and condition.

Rule source

win-unidentified-037-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Unidentified_037_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "f66674ea-c7b1-5d61-8f3a-4fbeef4b48f6"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.unidentified_037"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.unidentified_037_auto.yar#L1-L128"
		license_url = "N/A"
		logic_hash = "2d6fe9b1eae41be1b1b92374394bcc259a42d5631bf3a2af6adcc5352dcfd8bb"
		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 = { 8b45f4 8b7c2420 2bc2 8b5104 03c2 894108 }
		$sequence_1 = { 8d54ad00 8bc3 c1e205 03d5 895c2424 c1e202 2bc2 }
		$sequence_2 = { 0f849c020000 8d442410 57 8b3d???????? 50 66c7060000 ffd7 }
		$sequence_3 = { 8b7108 8b6c2428 8bd6 2bd3 c1fa04 2bfa 7415 }
		$sequence_4 = { 68???????? eb22 8a8424ac000000 a880 7407 68???????? eb10 }
		$sequence_5 = { 895e58 895e5c 895e60 8b4648 3bc3 741d 8d48ff }
		$sequence_6 = { 6a00 ff15???????? 50 ff15???????? 83c408 33ff e8???????? }
		$sequence_7 = { 50 8b442428 51 8b4c243c }
		$sequence_8 = { 83c008 50 8d85a0ebffff 50 e8???????? }
		$sequence_9 = { 84d2 7414 3ad3 7410 55 51 8d4c2418 }

	condition:
		7 of them and filesize < 167936
}

Strings (10 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ 8b45f4 8b7c2420 2bc2 8b5104 03c2 894108 }
$sequence_1hex{ 8d54ad00 8bc3 c1e205 03d5 895c2424 c1e202 2bc2 }
$sequence_2hex{ 0f849c020000 8d442410 57 8b3d???????? 50 66c7060000 ffd7 }
$sequence_3hex{ 8b7108 8b6c2428 8bd6 2bd3 c1fa04 2bfa 7415 }
$sequence_4hex{ 68???????? eb22 8a8424ac000000 a880 7407 68???????? eb10 }
$sequence_5hex{ 895e58 895e5c 895e60 8b4648 3bc3 741d 8d48ff }
$sequence_6hex{ 6a00 ff15???????? 50 ff15???????? 83c408 33ff e8???????? }
$sequence_7hex{ 50 8b442428 51 8b4c243c }
$sequence_8hex{ 83c008 50 8d85a0ebffff 50 e8???????? }
$sequence_9hex{ 84d2 7414 3ad3 7410 55 51 8d4c2418 }

Condition

7 of them and filesize < 167936

In plain words (Heuristic)

  • The file must be smaller than 167936 (a cheap guard that skips large files).
  • At least 7 patterns in the rule must match.

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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: f66674ea-c7b1-5d61-8f3a-4fbeef4b48f6

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