YARA · Malpedia signator rules
MALPEDIA_Win_Bachosens_Auto
autogenerated rule brought to you by yara-signator
MalwareBachosensMalpedia 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: Bachosens.
It defines 10 patterns (0 text, 10 hex, 0 regex).
Summary generated from the rule's metadata and condition.
Rule source
win-bachosens-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Bachosens_Auto : FILE
{
meta:
= "autogenerated rule brought to you by yara-signator"
= "Felix Bilstein - yara-signator at cocacoding dot com"
= "c3ae17b5-5204-5f65-af31-702850596b5b"
= "2026-05-04"
= "2026-05-18"
= "https://malpedia.caad.fkie.fraunhofer.de/details/win.bachosens"
= "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.bachosens_auto.yar#L1-L122"
= "N/A"
= "4bd1a35420cf40962f926575072382f9bc014a7da3c2700bbf3154843f1f8630"
= 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 = { 4d8b5310 49895b18 498973d8 49897bd0 4d896bc8 448be8 }
$sequence_1 = { 8d419f 3c19 7703 80c1e0 3ad1 7515 }
$sequence_2 = { 33c9 84db 740f 488bc7 90 }
$sequence_3 = { 4b8d0401 493bc2 7cd3 488935???????? 4c8b542458 }
$sequence_4 = { c3 48891c24 4d63d0 4585c0 7e3d 4c2bda bbe0ff0000 }
$sequence_5 = { 66443908 75f4 443bc1 740a b801000000 4883c408 }
$sequence_6 = { 8b442420 ffc0 89442420 4863442420 b944000000 }
$sequence_7 = { 660f1f840000000000 410fb707 418b3e 6603c1 4803f9 0fb7c0 }
$sequence_8 = { 488d4001 803800 75f5 33d2 385500 740e }
$sequence_9 = { 0fb61f 4803f1 84db 740e 488bc7 ffc2 }
condition:
7 of them and filesize < 643072
}
Strings (10 patterns)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $sequence_0 | hex | { 4d8b5310 49895b18 498973d8 49897bd0 4d896bc8 448be8 } | |
| $sequence_1 | hex | { 8d419f 3c19 7703 80c1e0 3ad1 7515 } | |
| $sequence_2 | hex | { 33c9 84db 740f 488bc7 90 } | |
| $sequence_3 | hex | { 4b8d0401 493bc2 7cd3 488935???????? 4c8b542458 } | |
| $sequence_4 | hex | { c3 48891c24 4d63d0 4585c0 7e3d 4c2bda bbe0ff0000 } | |
| $sequence_5 | hex | { 66443908 75f4 443bc1 740a b801000000 4883c408 } | |
| $sequence_6 | hex | { 8b442420 ffc0 89442420 4863442420 b944000000 } | |
| $sequence_7 | hex | { 660f1f840000000000 410fb707 418b3e 6603c1 4803f9 0fb7c0 } | |
| $sequence_8 | hex | { 488d4001 803800 75f5 33d2 385500 740e } | |
| $sequence_9 | hex | { 0fb61f 4803f1 84db 740e 488bc7 ffc2 } |
Condition
7 of them and filesize < 643072In plain words (Heuristic)
- The file must be smaller than 643072 (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: c3ae17b5-5204-5f65-af31-702850596b5b
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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