YARA · Malpedia signator rules
MALPEDIA_Win_Brambul_Auto
autogenerated rule brought to you by yara-signator
MalwareBrambulMalpedia 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: Brambul.
It defines 16 patterns (0 text, 16 hex, 0 regex).
Summary generated from the rule's metadata and condition.
Rule source
win-brambul-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Brambul_Auto : FILE
{
meta:
= "autogenerated rule brought to you by yara-signator"
= "Felix Bilstein - yara-signator at cocacoding dot com"
= "b876c689-d83b-5dec-b921-bfe452e3308e"
= "2026-05-04"
= "2026-05-18"
= "https://malpedia.caad.fkie.fraunhofer.de/details/win.brambul"
= "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.brambul_auto.yar#L1-L166"
= "N/A"
= "10ed389e06d32ea2cb75b4e9c1e8e63ca5a2399f331b65c0200a902b07d067b2"
= 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 = { 730d 8d8d887fffff 2bc1 48 }
$sequence_1 = { 83c40c 83f8ff 0f840d020000 a0???????? 3c34 7404 }
$sequence_2 = { 68???????? 55 e8???????? 83c40c 83f8ff 0f8488010000 6800040000 }
$sequence_3 = { 8bd7 33d1 035054 8d9c13f87ca21f 8bd3 c1ea10 }
$sequence_4 = { 894d08 85c9 0fb64a01 0f8429010000 d3ee }
$sequence_5 = { 8bb4247c010000 b980000000 8d5624 c6460873 8bfa f3ab }
$sequence_6 = { 8dbc37604bbbf6 8bf7 c1ee10 c1e710 0bf7 }
$sequence_7 = { 33c9 8a4e01 8bf9 8d5703 }
$sequence_8 = { 8d942474010000 57 52 8bf0 ff15???????? }
$sequence_9 = { 56 57 ff15???????? 8b7c2420 8b5c241c }
$sequence_10 = { 8d95887fffff 8dbd887fffff 3bd0 730d }
$sequence_11 = { 2bdf 2bcb 395df8 7612 295df8 8a11 }
$sequence_12 = { 66898dc0f5ffff 8d8dc4fdffff 8955dc 8945e0 51 8d9598e3ffff 68???????? }
$sequence_13 = { 8d85887fffff 2bd0 8955fc 837dfc00 }
$sequence_14 = { 8d542464 c744246400020000 52 f3a5 e8???????? }
$sequence_15 = { 8b442424 8b4c2428 8d9d28030000 6804010000 53 }
condition:
7 of them and filesize < 188416
}
Strings (16 patterns)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $sequence_0 | hex | { 730d 8d8d887fffff 2bc1 48 } | |
| $sequence_1 | hex | { 83c40c 83f8ff 0f840d020000 a0???????? 3c34 7404 } | |
| $sequence_2 | hex | { 68???????? 55 e8???????? 83c40c 83f8ff 0f8488010000 6800040000 } | |
| $sequence_3 | hex | { 8bd7 33d1 035054 8d9c13f87ca21f 8bd3 c1ea10 } | |
| $sequence_4 | hex | { 894d08 85c9 0fb64a01 0f8429010000 d3ee } | |
| $sequence_5 | hex | { 8bb4247c010000 b980000000 8d5624 c6460873 8bfa f3ab } | |
| $sequence_6 | hex | { 8dbc37604bbbf6 8bf7 c1ee10 c1e710 0bf7 } | |
| $sequence_7 | hex | { 33c9 8a4e01 8bf9 8d5703 } | |
| $sequence_8 | hex | { 8d942474010000 57 52 8bf0 ff15???????? } | |
| $sequence_9 | hex | { 56 57 ff15???????? 8b7c2420 8b5c241c } | |
| $sequence_10 | hex | { 8d95887fffff 8dbd887fffff 3bd0 730d } | |
| $sequence_11 | hex | { 2bdf 2bcb 395df8 7612 295df8 8a11 } | |
| $sequence_12 | hex | { 66898dc0f5ffff 8d8dc4fdffff 8955dc 8945e0 51 8d9598e3ffff 68???????? } | |
| $sequence_13 | hex | { 8d85887fffff 2bd0 8955fc 837dfc00 } | |
| $sequence_14 | hex | { 8d542464 c744246400020000 52 f3a5 e8???????? } | |
| $sequence_15 | hex | { 8b442424 8b4c2428 8d9d28030000 6804010000 53 } |
Condition
7 of them and filesize < 188416In plain words (Heuristic)
- The file must be smaller than 188416 (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: b876c689-d83b-5dec-b921-bfe452e3308e
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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