Skip to content

YARA · Malpedia signator rules

MALPEDIA_Win_Whiteblackcrypt_Auto

autogenerated rule brought to you by yara-signator

MalwareWhiteblackcryptMalpedia 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: Whiteblackcrypt.

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

Summary generated from the rule's metadata and condition.

Rule source

win-whiteblackcrypt-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Whiteblackcrypt_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "fc05c9b5-93d3-547a-b483-4cf070671b07"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.whiteblackcrypt"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.whiteblackcrypt_auto.yar#L1-L119"
		license_url = "N/A"
		logic_hash = "553d6e8fdc611531b3afb86539039720ae5eaac9626613ba9a8069195b84c748"
		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 = { 0f1086b0000000 4889f2 4889e9 0f29442420 e8???????? }
		$sequence_1 = { 8a4301 0fb64c243a 8844243b 8a4302 8844243c }
		$sequence_2 = { 83f8ff 89c5 749a 8b442420 488d7324 41b804010000 }
		$sequence_3 = { e8???????? 99 f7fd 88141e 48ffc3 ebec 4889f0 }
		$sequence_4 = { 4889c7 4989d9 41b800000002 ba01000000 4889f9 }
		$sequence_5 = { e8???????? 31c0 8a9407b0000000 301406 48ffc0 }
		$sequence_6 = { 0f8498000000 80fa2f 75e3 4883c001 }
		$sequence_7 = { 458a4803 458a7801 4489f7 4489d1 4431cf }
		$sequence_8 = { 0f94c2 89d0 4883c458 c3 53 4883ec20 ba2e000000 }
		$sequence_9 = { 0f29442420 e8???????? b80f000000 8a9406b0000000 80faff 7513 }

	condition:
		7 of them and filesize < 99328
}

Strings (10 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ 0f1086b0000000 4889f2 4889e9 0f29442420 e8???????? }
$sequence_1hex{ 8a4301 0fb64c243a 8844243b 8a4302 8844243c }
$sequence_2hex{ 83f8ff 89c5 749a 8b442420 488d7324 41b804010000 }
$sequence_3hex{ e8???????? 99 f7fd 88141e 48ffc3 ebec 4889f0 }
$sequence_4hex{ 4889c7 4989d9 41b800000002 ba01000000 4889f9 }
$sequence_5hex{ e8???????? 31c0 8a9407b0000000 301406 48ffc0 }
$sequence_6hex{ 0f8498000000 80fa2f 75e3 4883c001 }
$sequence_7hex{ 458a4803 458a7801 4489f7 4489d1 4431cf }
$sequence_8hex{ 0f94c2 89d0 4883c458 c3 53 4883ec20 ba2e000000 }
$sequence_9hex{ 0f29442420 e8???????? b80f000000 8a9406b0000000 80faff 7513 }

Condition

7 of them and filesize < 99328

In plain words (Heuristic)

  • The file must be smaller than 99328 (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: fc05c9b5-93d3-547a-b483-4cf070671b07

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