YARA · Malpedia signator rules
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:
= "autogenerated rule brought to you by yara-signator"
= "Felix Bilstein - yara-signator at cocacoding dot com"
= "337d44b2-46d4-5e7e-a734-714781e16443"
= "2026-05-04"
= "2026-05-18"
= "https://malpedia.caad.fkie.fraunhofer.de/details/win.crypt0l0cker"
= "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.crypt0l0cker_auto.yar#L1-L128"
= "N/A"
= "40b3f8f2093afa8cd8dce91e0fb7ec88299be59a2ac261908fb18d2d6bc2373b"
= 75
= 75
= "FILE"
= "1"
= "yara-signator v0.6.0"
= "callsandjumps;datarefs;binvalue"
= "20260422"
= "a182e35da64e6d71cb55f125c4d4225196523f14"
= "20260504"
= "CC BY-SA 4.0"
= "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)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $sequence_0 | hex | { 7447 8802 42 8b048d0028a900 4e 807d1301 6a02 } | |
| $sequence_1 | hex | { 3bc1 7717 50 8b45f4 ff75f8 03c6 50 } | |
| $sequence_2 | hex | { e8???????? 83c404 85c0 0f8576010000 68???????? ba57a597ab 8bce } | |
| $sequence_3 | hex | { 49 898d2cfdffff 85c0 0f84cc040000 8b8530fdffff ffb524fdffff 40 } | |
| $sequence_4 | hex | { 8bc8 894dec 85c9 0f8433010000 8b45f8 3bf8 7f61 } | |
| $sequence_5 | hex | { 833e00 75f6 6a24 e8???????? 83c404 8906 85c0 } | |
| $sequence_6 | hex | { 52 8b55fc a5 50 } | |
| $sequence_7 | hex | { c1e210 c1e810 03fa 03c8 897de8 } | |
| $sequence_8 | hex | { 50 8d542420 e8???????? 83c408 85c0 0f84ce000000 } | |
| $sequence_9 | hex | { 57 e8???????? 83c40c 56 8b75f8 57 8d4610 } |
Condition
7 of them and filesize < 917504In 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.
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)
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
| 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 |
Tags:FILE
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