YARA · Malpedia signator rules
MALPEDIA_Win_Sombrat_Auto
autogenerated rule brought to you by yara-signator
MalwareSombratMalpedia 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: Sombrat.
It defines 16 patterns (0 text, 16 hex, 0 regex).
Summary generated from the rule's metadata and condition.
Rule source
win-sombrat-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Sombrat_Auto : FILE
{
meta:
= "autogenerated rule brought to you by yara-signator"
= "Felix Bilstein - yara-signator at cocacoding dot com"
= "af13e03f-a95f-5ae9-ab66-143e3efb1589"
= "2026-05-04"
= "2026-05-18"
= "https://malpedia.caad.fkie.fraunhofer.de/details/win.sombrat"
= "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.sombrat_auto.yar#L1-L151"
= "N/A"
= "0df08af9c206a75a3da27570d60f8220a1618e070b3671a9b63afb191a74b380"
= 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 = { 014114 8b7508 837df800 8b5df4 0f84c3feffff }
$sequence_1 = { 834e4cff 66894650 8bc3 895620 }
$sequence_2 = { 01041e 8b4508 42 8d7308 }
$sequence_3 = { 0145e4 8b55f8 83c40c 294644 }
$sequence_4 = { 014620 f6460c04 8945e0 742d 85c0 7429 8b4de4 }
$sequence_5 = { 0000 e8???????? c70424???????? 8d5f0c 68???????? }
$sequence_6 = { 014620 ff36 114e24 8b442434 }
$sequence_7 = { 0144244a 894e0c ffb72c010000 ff15???????? }
$sequence_8 = { 016b08 33c0 e9???????? 33ff }
$sequence_9 = { 01448c20 48ffc1 493bc9 7cf1 }
$sequence_10 = { 016b08 488d05dc980500 41b9e7160000 4889442420 }
$sequence_11 = { 015f08 33c0 e9???????? 488b4760 }
$sequence_12 = { 0145f1 4533c9 4533c0 488b16 }
$sequence_13 = { 015f08 488bcf e8???????? 8bf0 }
$sequence_14 = { 015f08 33c0 488b4c2470 4833cc }
$sequence_15 = { 015f08 83bfd800000016 0f856c020000 488b87c8000000 }
condition:
7 of them and filesize < 1466368
}
Strings (16 patterns)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $sequence_0 | hex | { 014114 8b7508 837df800 8b5df4 0f84c3feffff } | |
| $sequence_1 | hex | { 834e4cff 66894650 8bc3 895620 } | |
| $sequence_2 | hex | { 01041e 8b4508 42 8d7308 } | |
| $sequence_3 | hex | { 0145e4 8b55f8 83c40c 294644 } | |
| $sequence_4 | hex | { 014620 f6460c04 8945e0 742d 85c0 7429 8b4de4 } | |
| $sequence_5 | hex | { 0000 e8???????? c70424???????? 8d5f0c 68???????? } | |
| $sequence_6 | hex | { 014620 ff36 114e24 8b442434 } | |
| $sequence_7 | hex | { 0144244a 894e0c ffb72c010000 ff15???????? } | |
| $sequence_8 | hex | { 016b08 33c0 e9???????? 33ff } | |
| $sequence_9 | hex | { 01448c20 48ffc1 493bc9 7cf1 } | |
| $sequence_10 | hex | { 016b08 488d05dc980500 41b9e7160000 4889442420 } | |
| $sequence_11 | hex | { 015f08 33c0 e9???????? 488b4760 } | |
| $sequence_12 | hex | { 0145f1 4533c9 4533c0 488b16 } | |
| $sequence_13 | hex | { 015f08 488bcf e8???????? 8bf0 } | |
| $sequence_14 | hex | { 015f08 33c0 488b4c2470 4833cc } | |
| $sequence_15 | hex | { 015f08 83bfd800000016 0f856c020000 488b87c8000000 } |
Condition
7 of them and filesize < 1466368In plain words (Heuristic)
- The file must be smaller than 1466368 (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: af13e03f-a95f-5ae9-ab66-143e3efb1589
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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