YARA · Malpedia signator rules
MALPEDIA_Win_Gcman_Auto
autogenerated rule brought to you by yara-signator
- 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: Gcman.
It defines 10 patterns (0 text, 10 hex, 0 regex).
Summary generated from the rule's metadata and condition.
Rule source
win-gcman-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Gcman_Auto : FILE
{
meta:
= "autogenerated rule brought to you by yara-signator"
= "Felix Bilstein - yara-signator at cocacoding dot com"
= "8224ea9b-cee2-5e48-9bd4-a2a5010f2b30"
= "2026-05-04"
= "2026-05-18"
= "https://malpedia.caad.fkie.fraunhofer.de/details/win.gcman"
= "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.gcman_auto.yar#L1-L121"
= "N/A"
= "4cf582ce3815e6490fdc2c444f74be071ece657cca140e110f40f7d491c65c14"
= 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 = { c745fc00000000 8b4508 803800 0f8487000000 }
$sequence_1 = { ff00 837dec01 7443 837dec01 7f0b 837dec00 }
$sequence_2 = { 8b04d5e4504000 ffd0 8945fc c745f401000000 eb07 }
$sequence_3 = { 8d45f4 ff00 ebe7 8b45f4 803800 }
$sequence_4 = { e9???????? 837d0c00 0f8e94000000 8b4dfc }
$sequence_5 = { 09de 31c6 0375c0 01f1 81e9ecbcfe5c }
$sequence_6 = { 7513 8d85d8ebffff 890424 e8???????? a3???????? 8b8590eaffff 89442408 }
$sequence_7 = { 8902 8b5508 83c20c 8b4508 83c00c 8b00 01d8 }
$sequence_8 = { 0385f4efffff 89442404 8b85e0efffff 890424 e8???????? 83ec14 8b85ecefffff }
$sequence_9 = { 40 890424 e8???????? 8945fc 8b45fc 89442408 8b450c }
condition:
7 of them and filesize < 81920
}
Strings (10 patterns)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $sequence_0 | hex | { c745fc00000000 8b4508 803800 0f8487000000 } | |
| $sequence_1 | hex | { ff00 837dec01 7443 837dec01 7f0b 837dec00 } | |
| $sequence_2 | hex | { 8b04d5e4504000 ffd0 8945fc c745f401000000 eb07 } | |
| $sequence_3 | hex | { 8d45f4 ff00 ebe7 8b45f4 803800 } | |
| $sequence_4 | hex | { e9???????? 837d0c00 0f8e94000000 8b4dfc } | |
| $sequence_5 | hex | { 09de 31c6 0375c0 01f1 81e9ecbcfe5c } | |
| $sequence_6 | hex | { 7513 8d85d8ebffff 890424 e8???????? a3???????? 8b8590eaffff 89442408 } | |
| $sequence_7 | hex | { 8902 8b5508 83c20c 8b4508 83c00c 8b00 01d8 } | |
| $sequence_8 | hex | { 0385f4efffff 89442404 8b85e0efffff 890424 e8???????? 83ec14 8b85ecefffff } | |
| $sequence_9 | hex | { 40 890424 e8???????? 8945fc 8b45fc 89442408 8b450c } |
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.
Test this rule in your browser
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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: 8224ea9b-cee2-5e48-9bd4-a2a5010f2b30
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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