YARA · Malpedia signator rules
MALPEDIA_Win_Graphsteel_Auto
autogenerated rule brought to you by yara-signator
MalwareGraphsteelMalpedia 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: Graphsteel.
It defines 10 patterns (0 text, 10 hex, 0 regex).
Summary generated from the rule's metadata and condition.
Rule source
win-graphsteel-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Graphsteel_Auto : FILE
{
meta:
= "autogenerated rule brought to you by yara-signator"
= "Felix Bilstein - yara-signator at cocacoding dot com"
= "002d4f69-04f1-5e03-80bc-b5ac9cab1bdb"
= "2026-05-04"
= "2026-05-18"
= "https://malpedia.caad.fkie.fraunhofer.de/details/win.graphsteel"
= "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.graphsteel_auto.yar#L1-L134"
= "N/A"
= "0d13092c745c3a7a45f6cae4ad1356a333a840eb25ef3d3836be36a3d9bc8246"
= 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 = { c7400c00000000 48c7401000000000 c7007e000000 4489542420 448b442450 4589f9 4889f9 }
$sequence_1 = { 4c898c24b8010000 4889bc24c0010000 4c8b9424b8010000 4d85d2 7422 450fb65a17 4589dc }
$sequence_2 = { e8???????? b801000000 89e9 d3e0 410985cc000000 83fd01 741a }
$sequence_3 = { f7466000ffff00 753b 8b96d4000000 c6466101 85d2 7e0a c7866001000001000000 }
$sequence_4 = { bb16000000 e8???????? 4889842498020000 48899c2498010000 4889d9 4889c3 488d056e743e00 }
$sequence_5 = { ff5030 85c0 752a 48638bbc000000 488b442428 4801c8 4883e801 }
$sequence_6 = { ffd0 488b6c2448 4883c450 c3 31c0 488d1df2193a00 b926000000 }
$sequence_7 = { 8b54244c 4c8b742430 4189c4 498916 4889d0 4180fc04 0f84dc000000 }
$sequence_8 = { c3 488d05c9d85e00 bb0a000000 0f1f440000 e8???????? 488b4c2428 890d???????? }
$sequence_9 = { eb0c 488d3df63c8600 e8???????? 488b0d???????? 48898c2498030000 488d05f3085500 e8???????? }
condition:
7 of them and filesize < 19812352
}
Strings (10 patterns)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $sequence_0 | hex | { c7400c00000000 48c7401000000000 c7007e000000 4489542420 448b442450 4589f9 4889f9 } | |
| $sequence_1 | hex | { 4c898c24b8010000 4889bc24c0010000 4c8b9424b8010000 4d85d2 7422 450fb65a17 4589dc } | |
| $sequence_2 | hex | { e8???????? b801000000 89e9 d3e0 410985cc000000 83fd01 741a } | |
| $sequence_3 | hex | { f7466000ffff00 753b 8b96d4000000 c6466101 85d2 7e0a c7866001000001000000 } | |
| $sequence_4 | hex | { bb16000000 e8???????? 4889842498020000 48899c2498010000 4889d9 4889c3 488d056e743e00 } | |
| $sequence_5 | hex | { ff5030 85c0 752a 48638bbc000000 488b442428 4801c8 4883e801 } | |
| $sequence_6 | hex | { ffd0 488b6c2448 4883c450 c3 31c0 488d1df2193a00 b926000000 } | |
| $sequence_7 | hex | { 8b54244c 4c8b742430 4189c4 498916 4889d0 4180fc04 0f84dc000000 } | |
| $sequence_8 | hex | { c3 488d05c9d85e00 bb0a000000 0f1f440000 e8???????? 488b4c2428 890d???????? } | |
| $sequence_9 | hex | { eb0c 488d3df63c8600 e8???????? 488b0d???????? 48898c2498030000 488d05f3085500 e8???????? } |
Condition
7 of them and filesize < 19812352In plain words (Heuristic)
- The file must be smaller than 19812352 (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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Drop a file here or click to chooseScanned locally with YARA-X. Files up to 200 MB.
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: 002d4f69-04f1-5e03-80bc-b5ac9cab1bdb
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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