Skip to content

YARA · Malpedia signator rules

MALPEDIA_Win_Unidentified_074_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-074-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Unidentified_074_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "06f7aa01-f191-54de-a676-efe22bef6230"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.unidentified_074"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.unidentified_074_auto.yar#L1-L122"
		license_url = "N/A"
		logic_hash = "b4388f366ca52c7df9d794bf9eb2d136a972045d8a1c1c2ab56f0a2e6a455390"
		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 = { 8acf 8a55ea 8ac3 c0e904 }
		$sequence_1 = { 33c0 c785a4dfffff07000000 50 68???????? 8d8d90dfffff c785a0dfffff00000000 }
		$sequence_2 = { 0f84ce190000 83ec08 0fae5c2404 8b442404 25807f0000 3d801f0000 750f }
		$sequence_3 = { c7853cffffff73657400 c745e8706f7274 c745ec73657400 56 50 53 e8???????? }
		$sequence_4 = { 894dfc 8b7e10 c745f001000000 8b4310 40 }
		$sequence_5 = { 5e 5d c20800 85ff 7511 897e10 83f808 }
		$sequence_6 = { 6a00 6a00 ff15???????? 8b35???????? 0f1f440000 6a0a }
		$sequence_7 = { c7853cffffff73657400 c745e8706f7274 c745ec73657400 56 }
		$sequence_8 = { 8d85c0dfffff 50 56 ffd7 85c0 75c9 8b85bcdfffff }
		$sequence_9 = { 0f84d2000000 ff750c ffb5f0f7ffff 6a00 6a00 }

	condition:
		7 of them and filesize < 335872
}

Strings (10 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ 8acf 8a55ea 8ac3 c0e904 }
$sequence_1hex{ 33c0 c785a4dfffff07000000 50 68???????? 8d8d90dfffff c785a0dfffff00000000 }
$sequence_2hex{ 0f84ce190000 83ec08 0fae5c2404 8b442404 25807f0000 3d801f0000 750f }
$sequence_3hex{ c7853cffffff73657400 c745e8706f7274 c745ec73657400 56 50 53 e8???????? }
$sequence_4hex{ 894dfc 8b7e10 c745f001000000 8b4310 40 }
$sequence_5hex{ 5e 5d c20800 85ff 7511 897e10 83f808 }
$sequence_6hex{ 6a00 6a00 ff15???????? 8b35???????? 0f1f440000 6a0a }
$sequence_7hex{ c7853cffffff73657400 c745e8706f7274 c745ec73657400 56 }
$sequence_8hex{ 8d85c0dfffff 50 56 ffd7 85c0 75c9 8b85bcdfffff }
$sequence_9hex{ 0f84d2000000 ff750c ffb5f0f7ffff 6a00 6a00 }

Condition

7 of them and filesize < 335872

In plain words (Heuristic)

  • The file must be smaller than 335872 (a cheap guard that skips large files).
  • At least 7 patterns in the rule must match.

Test this rule in your browser

Drop a file to scan it with this rule using YARA-X compiled to WebAssembly. Nothing is uploaded.

Drop a file here or click to chooseScanned locally with YARA-X. Files up to 200 MB.

Open in editor

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: 06f7aa01-f191-54de-a676-efe22bef6230

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