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MALPEDIA_Win_Crypt0L0Cker_Auto

autogenerated rule brought to you by yara-signator

MalwareCrypt0L0CkerMalpedia 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: Crypt0L0Cker.

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

Summary generated from the rule's metadata and condition.

Rule source

win-crypt0l0cker-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Crypt0L0Cker_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "337d44b2-46d4-5e7e-a734-714781e16443"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.crypt0l0cker"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.crypt0l0cker_auto.yar#L1-L128"
		license_url = "N/A"
		logic_hash = "40b3f8f2093afa8cd8dce91e0fb7ec88299be59a2ac261908fb18d2d6bc2373b"
		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 = { 7447 8802 42 8b048d0028a900 4e 807d1301 6a02 }
		$sequence_1 = { 3bc1 7717 50 8b45f4 ff75f8 03c6 50 }
		$sequence_2 = { e8???????? 83c404 85c0 0f8576010000 68???????? ba57a597ab 8bce }
		$sequence_3 = { 49 898d2cfdffff 85c0 0f84cc040000 8b8530fdffff ffb524fdffff 40 }
		$sequence_4 = { 8bc8 894dec 85c9 0f8433010000 8b45f8 3bf8 7f61 }
		$sequence_5 = { 833e00 75f6 6a24 e8???????? 83c404 8906 85c0 }
		$sequence_6 = { 52 8b55fc a5 50 }
		$sequence_7 = { c1e210 c1e810 03fa 03c8 897de8 }
		$sequence_8 = { 50 8d542420 e8???????? 83c408 85c0 0f84ce000000 }
		$sequence_9 = { 57 e8???????? 83c40c 56 8b75f8 57 8d4610 }

	condition:
		7 of them and filesize < 917504
}

Strings (10 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ 7447 8802 42 8b048d0028a900 4e 807d1301 6a02 }
$sequence_1hex{ 3bc1 7717 50 8b45f4 ff75f8 03c6 50 }
$sequence_2hex{ e8???????? 83c404 85c0 0f8576010000 68???????? ba57a597ab 8bce }
$sequence_3hex{ 49 898d2cfdffff 85c0 0f84cc040000 8b8530fdffff ffb524fdffff 40 }
$sequence_4hex{ 8bc8 894dec 85c9 0f8433010000 8b45f8 3bf8 7f61 }
$sequence_5hex{ 833e00 75f6 6a24 e8???????? 83c404 8906 85c0 }
$sequence_6hex{ 52 8b55fc a5 50 }
$sequence_7hex{ c1e210 c1e810 03fa 03c8 897de8 }
$sequence_8hex{ 50 8d542420 e8???????? 83c408 85c0 0f84ce000000 }
$sequence_9hex{ 57 e8???????? 83c40c 56 8b75f8 57 8d4610 }

Condition

7 of them and filesize < 917504

In plain words (Heuristic)

  • The file must be smaller than 917504 (a cheap guard that skips large files).
  • At least 7 patterns in the rule must match.

Test this rule in your browser

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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: 337d44b2-46d4-5e7e-a734-714781e16443

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