YARA · Malpedia signator rules
MALPEDIA_Win_Bleachgap_Auto
autogenerated rule brought to you by yara-signator
MalwareBleachgapMalpedia 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: Bleachgap.
It defines 10 patterns (0 text, 10 hex, 0 regex).
Summary generated from the rule's metadata and condition.
Rule source
win-bleachgap-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Bleachgap_Auto : FILE
{
meta:
= "autogenerated rule brought to you by yara-signator"
= "Felix Bilstein - yara-signator at cocacoding dot com"
= "0b7104e7-d882-5b97-bb84-47dba5454a43"
= "2026-05-04"
= "2026-05-18"
= "https://malpedia.caad.fkie.fraunhofer.de/details/win.bleachgap"
= "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.bleachgap_auto.yar#L1-L134"
= "N/A"
= "69e5613692d72f85c8f8f372fde97f28793e3e61fc475bd026973cd7cf7dca02"
= 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 = { 33f6 894d08 85ff 7426 0f1f8000000000 8b01 8b5010 }
$sequence_1 = { 83f810 7231 8b954cfeffff 8d4801 8bc2 81f900100000 7214 }
$sequence_2 = { 894b28 f30f7e462c 660fd6432c 8b4e34 5f 5e 894b34 }
$sequence_3 = { 83c404 85c0 78c6 74c1 56 895c2418 c7461401000000 }
$sequence_4 = { 8b4c2448 83c40c 49 83f903 0f878f000000 ff248d28235000 53 }
$sequence_5 = { 33c8 330c9508065f00 8b5734 33d9 33d6 33d5 33d3 }
$sequence_6 = { 85c0 745e 8b477c 6878020000 68???????? 89b014020000 8b477c }
$sequence_7 = { c1e804 6a02 0fb680d8675c00 8844241c 0fb681d8675c00 8844241d 8d44241c }
$sequence_8 = { 85c0 7508 8986f84b6100 eb21 50 e8???????? 50 }
$sequence_9 = { 85f6 0f8488020000 8b461c 56 6a00 c746602e000000 896e5c }
condition:
7 of them and filesize < 4538368
}
Strings (10 patterns)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $sequence_0 | hex | { 33f6 894d08 85ff 7426 0f1f8000000000 8b01 8b5010 } | |
| $sequence_1 | hex | { 83f810 7231 8b954cfeffff 8d4801 8bc2 81f900100000 7214 } | |
| $sequence_2 | hex | { 894b28 f30f7e462c 660fd6432c 8b4e34 5f 5e 894b34 } | |
| $sequence_3 | hex | { 83c404 85c0 78c6 74c1 56 895c2418 c7461401000000 } | |
| $sequence_4 | hex | { 8b4c2448 83c40c 49 83f903 0f878f000000 ff248d28235000 53 } | |
| $sequence_5 | hex | { 33c8 330c9508065f00 8b5734 33d9 33d6 33d5 33d3 } | |
| $sequence_6 | hex | { 85c0 745e 8b477c 6878020000 68???????? 89b014020000 8b477c } | |
| $sequence_7 | hex | { c1e804 6a02 0fb680d8675c00 8844241c 0fb681d8675c00 8844241d 8d44241c } | |
| $sequence_8 | hex | { 85c0 7508 8986f84b6100 eb21 50 e8???????? 50 } | |
| $sequence_9 | hex | { 85f6 0f8488020000 8b461c 56 6a00 c746602e000000 896e5c } |
Condition
7 of them and filesize < 4538368In plain words (Heuristic)
- The file must be smaller than 4538368 (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: 0b7104e7-d882-5b97-bb84-47dba5454a43
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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