YARA · Malpedia signator rules
MALPEDIA_Win_Atomsilo_Auto
autogenerated rule brought to you by yara-signator
MalwareAtomsiloMalpedia 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: Atomsilo.
It defines 10 patterns (0 text, 10 hex, 0 regex).
Summary generated from the rule's metadata and condition.
Rule source
win-atomsilo-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Atomsilo_Auto : FILE
{
meta:
= "autogenerated rule brought to you by yara-signator"
= "Felix Bilstein - yara-signator at cocacoding dot com"
= "d56ff9dc-c6da-5ce3-9866-a0f92a265c16"
= "2026-05-04"
= "2026-05-18"
= "https://malpedia.caad.fkie.fraunhofer.de/details/win.atomsilo"
= "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.atomsilo_auto.yar#L1-L132"
= "N/A"
= "eedf190699e5a77790aa9c1a48c90800f4843755894a15aa3c5dc95df93d79e0"
= 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???????? 90 84db 0f84e3000000 ba01000000 488d4de0 }
$sequence_1 = { 33ed 896808 40382d???????? 750c e8???????? c605????????01 488d05824c0600 }
$sequence_2 = { 4889442458 33c9 894c2460 48c70001000000 48894808 c744243004000000 488b4e18 }
$sequence_3 = { 498bc3 49f7e9 4c8bfa 49c1ff05 498bc7 48c1e83f 4c03f8 }
$sequence_4 = { 90 488bd0 488d4e60 e8???????? 90 488b4d60 48394d58 }
$sequence_5 = { 8844245a 8b442450 0407 83f04f 8844245b 8b442450 }
$sequence_6 = { 7235 488b8990000000 48ffc2 4881fa00100000 721c 4883c227 488b79f8 }
$sequence_7 = { e8???????? 90 4584ff 7454 488bce e8???????? 8bf8 }
$sequence_8 = { ba01000000 e9???????? 837dd801 0f84c8000000 833d????????01 0f8485010000 488b45c8 }
$sequence_9 = { 4c2b5c2438 498d7d01 4c8b9424d0000000 488d3cfe 4c8b642430 4c2beb 4c2bde }
condition:
7 of them and filesize < 1785856
}
Strings (10 patterns)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $sequence_0 | hex | { e8???????? 90 84db 0f84e3000000 ba01000000 488d4de0 } | |
| $sequence_1 | hex | { 33ed 896808 40382d???????? 750c e8???????? c605????????01 488d05824c0600 } | |
| $sequence_2 | hex | { 4889442458 33c9 894c2460 48c70001000000 48894808 c744243004000000 488b4e18 } | |
| $sequence_3 | hex | { 498bc3 49f7e9 4c8bfa 49c1ff05 498bc7 48c1e83f 4c03f8 } | |
| $sequence_4 | hex | { 90 488bd0 488d4e60 e8???????? 90 488b4d60 48394d58 } | |
| $sequence_5 | hex | { 8844245a 8b442450 0407 83f04f 8844245b 8b442450 } | |
| $sequence_6 | hex | { 7235 488b8990000000 48ffc2 4881fa00100000 721c 4883c227 488b79f8 } | |
| $sequence_7 | hex | { e8???????? 90 4584ff 7454 488bce e8???????? 8bf8 } | |
| $sequence_8 | hex | { ba01000000 e9???????? 837dd801 0f84c8000000 833d????????01 0f8485010000 488b45c8 } | |
| $sequence_9 | hex | { 4c2b5c2438 498d7d01 4c8b9424d0000000 488d3cfe 4c8b642430 4c2beb 4c2bde } |
Condition
7 of them and filesize < 1785856In plain words (Heuristic)
- The file must be smaller than 1785856 (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: d56ff9dc-c6da-5ce3-9866-a0f92a265c16
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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