YARA · Malpedia signator rules
MALPEDIA_Win_Silon_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: Silon.
It defines 10 patterns (0 text, 10 hex, 0 regex).
Summary generated from the rule's metadata and condition.
Rule source
win-silon-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Silon_Auto : FILE
{
meta:
= "autogenerated rule brought to you by yara-signator"
= "Felix Bilstein - yara-signator at cocacoding dot com"
= "247924ed-f798-5dea-a405-e1d412986e79"
= "2026-05-04"
= "2026-05-18"
= "https://malpedia.caad.fkie.fraunhofer.de/details/win.silon"
= "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.silon_auto.yar#L1-L132"
= "N/A"
= "d3b6d3dedd8b6971c59e42395527e482df202c59ba94cd017e9c039a3ec7d6e8"
= 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 = { e8???????? 83c404 e8???????? c745fc02000000 8b55fc 83c232 8855f4 }
$sequence_1 = { 8b65e8 a1???????? 50 e8???????? 83c404 c745b400000000 c745fcffffffff }
$sequence_2 = { 0f84a1000000 8b4d98 51 e8???????? 83c404 8b5508 8bb258080000 }
$sequence_3 = { 755e 8b450c 50 e8???????? 83c404 8bf0 8b4d10 }
$sequence_4 = { 6a03 6a02 e8???????? 83c40c 8985c4efffff 83bdc4efffffff 7508 }
$sequence_5 = { 8b55d4 52 68???????? 8d85b4feffff 50 e8???????? 83c40c }
$sequence_6 = { e8???????? 83c404 83c001 8945f0 8b4df0 51 6a00 }
$sequence_7 = { 837dc404 0f8de9010000 6a03 6a00 8d4de0 51 }
$sequence_8 = { 83c420 8985c8f7ffff 83bdc8f7ffffff 0f84b9000000 6a00 6a00 }
$sequence_9 = { c7440a0c01000000 6a04 8b4508 50 8b4dc8 6bc924 8b15???????? }
condition:
7 of them and filesize < 122880
}
Strings (10 patterns)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $sequence_0 | hex | { e8???????? 83c404 e8???????? c745fc02000000 8b55fc 83c232 8855f4 } | |
| $sequence_1 | hex | { 8b65e8 a1???????? 50 e8???????? 83c404 c745b400000000 c745fcffffffff } | |
| $sequence_2 | hex | { 0f84a1000000 8b4d98 51 e8???????? 83c404 8b5508 8bb258080000 } | |
| $sequence_3 | hex | { 755e 8b450c 50 e8???????? 83c404 8bf0 8b4d10 } | |
| $sequence_4 | hex | { 6a03 6a02 e8???????? 83c40c 8985c4efffff 83bdc4efffffff 7508 } | |
| $sequence_5 | hex | { 8b55d4 52 68???????? 8d85b4feffff 50 e8???????? 83c40c } | |
| $sequence_6 | hex | { e8???????? 83c404 83c001 8945f0 8b4df0 51 6a00 } | |
| $sequence_7 | hex | { 837dc404 0f8de9010000 6a03 6a00 8d4de0 51 } | |
| $sequence_8 | hex | { 83c420 8985c8f7ffff 83bdc8f7ffffff 0f84b9000000 6a00 6a00 } | |
| $sequence_9 | hex | { c7440a0c01000000 6a04 8b4508 50 8b4dc8 6bc924 8b15???????? } |
Condition
7 of them and filesize < 122880In plain words (Heuristic)
- The file must be smaller than 122880 (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: 247924ed-f798-5dea-a405-e1d412986e79
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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