YARA · Malpedia signator rules
MALPEDIA_Win_Crypmic_Auto
autogenerated rule brought to you by yara-signator
MalwareCrypmicMalpedia 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: Crypmic.
It defines 10 patterns (0 text, 10 hex, 0 regex).
Summary generated from the rule's metadata and condition.
Rule source
win-crypmic-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Crypmic_Auto : FILE
{
meta:
= "autogenerated rule brought to you by yara-signator"
= "Felix Bilstein - yara-signator at cocacoding dot com"
= "2fb5a5d4-5639-5151-9ecd-a14d51c7dc38"
= "2026-05-04"
= "2026-05-18"
= "https://malpedia.caad.fkie.fraunhofer.de/details/win.crypmic"
= "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.crypmic_auto.yar#L1-L118"
= "N/A"
= "e3f372b74e5b162e0a142ad1aca38c8e8cd788c7dafdd2731e03882c89febb3e"
= 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 = { 6810040000 6a08 ff7104 8bfa }
$sequence_1 = { ff7104 8bfa 894dec c745e800000000 ffd0 0fb717 }
$sequence_2 = { 8bec 83ec0c 8b413c 53 8b440878 }
$sequence_3 = { 8b413c 33db 8b440878 03c1 8945fc 395818 }
$sequence_4 = { ffd0 85f6 7410 8b55f8 33c0 8bcf 66894302 }
$sequence_5 = { 8b470c 6a00 ff7704 ffd0 }
$sequence_6 = { d3e0 8d048528000000 50 8b4608 6a08 ff7604 ffd0 }
$sequence_7 = { 8b4de4 894f04 8b4de8 894f08 668b4df0 66894f0c }
$sequence_8 = { 72f0 8b45f0 5f 5e 5b }
$sequence_9 = { ffd0 c70700000000 5f 5e }
condition:
7 of them and filesize < 81920
}
Strings (10 patterns)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $sequence_0 | hex | { 6810040000 6a08 ff7104 8bfa } | |
| $sequence_1 | hex | { ff7104 8bfa 894dec c745e800000000 ffd0 0fb717 } | |
| $sequence_2 | hex | { 8bec 83ec0c 8b413c 53 8b440878 } | |
| $sequence_3 | hex | { 8b413c 33db 8b440878 03c1 8945fc 395818 } | |
| $sequence_4 | hex | { ffd0 85f6 7410 8b55f8 33c0 8bcf 66894302 } | |
| $sequence_5 | hex | { 8b470c 6a00 ff7704 ffd0 } | |
| $sequence_6 | hex | { d3e0 8d048528000000 50 8b4608 6a08 ff7604 ffd0 } | |
| $sequence_7 | hex | { 8b4de4 894f04 8b4de8 894f08 668b4df0 66894f0c } | |
| $sequence_8 | hex | { 72f0 8b45f0 5f 5e 5b } | |
| $sequence_9 | hex | { ffd0 c70700000000 5f 5e } |
Condition
7 of them and filesize < 81920In plain words (Heuristic)
- The file must be smaller than 81920 (a cheap guard that skips large files).
- At least 7 patterns in the rule must match.
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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: 2fb5a5d4-5639-5151-9ecd-a14d51c7dc38
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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