Skip to content

YARA · Malpedia signator rules

MALPEDIA_Win_Unidentified_077_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-077-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Unidentified_077_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "3b8ce629-be81-5718-b343-4456bf84f34b"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.unidentified_077"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.unidentified_077_auto.yar#L1-L113"
		license_url = "N/A"
		logic_hash = "92845c8e7f25ff0c6256c08ed3227d9541fa707c62bf6ffcfe21d1a372a280ec"
		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 = { e8???????? 85c0 740c 488d0dc9060000 }
		$sequence_1 = { 48ffc1 3a440eff 7513 4883f907 75ed }
		$sequence_2 = { 44896c2444 418d45ff 0fb68c8252400100 0fb6b48253400100 8bd9 8bf8 }
		$sequence_3 = { 4c8bea 4c8be1 4883fa40 7312 }
		$sequence_4 = { 48894638 488d059cfcffff 48894640 488d05a1fcffff }
		$sequence_5 = { 4c8bea f04f0fb1bcf1a0bf0100 4c8b05???????? 4883cfff 418bc8 }
		$sequence_6 = { 4c8bf0 4885c0 751b ff15???????? 488bce 418907 }
		$sequence_7 = { 48895c2458 ff15???????? 488bf8 4885c0 }
		$sequence_8 = { 7407 483bdf 747a eb73 4d8bbcf700310100 33d2 498bcf }
		$sequence_9 = { 0f84be000000 8b7500 33c0 f04d0fb1bcf180bf0100 }

	condition:
		7 of them and filesize < 270336
}

Strings (10 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ e8???????? 85c0 740c 488d0dc9060000 }
$sequence_1hex{ 48ffc1 3a440eff 7513 4883f907 75ed }
$sequence_2hex{ 44896c2444 418d45ff 0fb68c8252400100 0fb6b48253400100 8bd9 8bf8 }
$sequence_3hex{ 4c8bea 4c8be1 4883fa40 7312 }
$sequence_4hex{ 48894638 488d059cfcffff 48894640 488d05a1fcffff }
$sequence_5hex{ 4c8bea f04f0fb1bcf1a0bf0100 4c8b05???????? 4883cfff 418bc8 }
$sequence_6hex{ 4c8bf0 4885c0 751b ff15???????? 488bce 418907 }
$sequence_7hex{ 48895c2458 ff15???????? 488bf8 4885c0 }
$sequence_8hex{ 7407 483bdf 747a eb73 4d8bbcf700310100 33d2 498bcf }
$sequence_9hex{ 0f84be000000 8b7500 33c0 f04d0fb1bcf180bf0100 }

Condition

7 of them and filesize < 270336

In plain words (Heuristic)

  • The file must be smaller than 270336 (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: 3b8ce629-be81-5718-b343-4456bf84f34b

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