Skip to content

YARA · Malpedia signator rules

MALPEDIA_Win_Vanhelsing_Auto

autogenerated rule brought to you by yara-signator

MalwareVanhelsingMalpedia 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: Vanhelsing.

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

Summary generated from the rule's metadata and condition.

Rule source

win-vanhelsing-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Vanhelsing_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "4d1a343a-0c6b-5c37-9695-c6037c02d0e0"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.vanhelsing"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.vanhelsing_auto.yar#L1-L133"
		license_url = "N/A"
		logic_hash = "ccbfeac61004bf4c8294fe46b3e9097ef1cf43d2830ff6b8aa99cc9635698e18"
		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 = { 8b458c 038508ffffff 1395c0feffff 03856cffffff 898524ffffff 139530ffffff 33850cffffff }
		$sequence_1 = { 898d1cffffff 03ca 89b568ffffff 13b508ffffff 33d9 33c6 898d64ffffff }
		$sequence_2 = { 8b45ac 0f1006 0f57c8 8b4db0 0f289580feffff 0f289d70feffff 0f1108 }
		$sequence_3 = { 898d08ffffff 138568ffffff 33d9 33d0 899d68ffffff c1a568ffffff10 0facd310 }
		$sequence_4 = { 898df4feffff 33c6 8b8d6cffffff 8bf0 33ca c1e610 0facc810 }
		$sequence_5 = { 0bf9 8b8d44ffffff 03c2 898564ffffff 13cf 89950cffffff 33c6 }
		$sequence_6 = { 8bc4 0f1045d0 83ec10 0f1100 8bc4 0f108560ffffff 0f1100 }
		$sequence_7 = { 3bc8 740c 8b0cb514bd4800 46 85c9 75f0 }
		$sequence_8 = { 55 8bec 8b450c ff7510 ff348544bc4800 ff7508 e8???????? }
		$sequence_9 = { 83c220 03c2 83c40c 83c620 3bc7 8b459c 76db }

	condition:
		7 of them and filesize < 2981888
}

Strings (10 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ 8b458c 038508ffffff 1395c0feffff 03856cffffff 898524ffffff 139530ffffff 33850cffffff }
$sequence_1hex{ 898d1cffffff 03ca 89b568ffffff 13b508ffffff 33d9 33c6 898d64ffffff }
$sequence_2hex{ 8b45ac 0f1006 0f57c8 8b4db0 0f289580feffff 0f289d70feffff 0f1108 }
$sequence_3hex{ 898d08ffffff 138568ffffff 33d9 33d0 899d68ffffff c1a568ffffff10 0facd310 }
$sequence_4hex{ 898df4feffff 33c6 8b8d6cffffff 8bf0 33ca c1e610 0facc810 }
$sequence_5hex{ 0bf9 8b8d44ffffff 03c2 898564ffffff 13cf 89950cffffff 33c6 }
$sequence_6hex{ 8bc4 0f1045d0 83ec10 0f1100 8bc4 0f108560ffffff 0f1100 }
$sequence_7hex{ 3bc8 740c 8b0cb514bd4800 46 85c9 75f0 }
$sequence_8hex{ 55 8bec 8b450c ff7510 ff348544bc4800 ff7508 e8???????? }
$sequence_9hex{ 83c220 03c2 83c40c 83c620 3bc7 8b459c 76db }

Condition

7 of them and filesize < 2981888

In plain words (Heuristic)

  • The file must be smaller than 2981888 (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: 4d1a343a-0c6b-5c37-9695-c6037c02d0e0

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