YARA · Malpedia signator rules
MALPEDIA_Win_Starcruft_Auto
autogenerated rule brought to you by yara-signator
MalwareStarcruftMalpedia 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: Starcruft.
It defines 10 patterns (0 text, 10 hex, 0 regex).
Summary generated from the rule's metadata and condition.
Rule source
win-starcruft-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Starcruft_Auto : FILE
{
meta:
= "autogenerated rule brought to you by yara-signator"
= "Felix Bilstein - yara-signator at cocacoding dot com"
= "dc096f6e-ea1d-5470-8866-51bf722773fb"
= "2026-05-04"
= "2026-05-18"
= "https://malpedia.caad.fkie.fraunhofer.de/details/win.starcruft"
= "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.starcruft_auto.yar#L1-L127"
= "N/A"
= "b72b8384869c2c954f191bce498484c3530f8a31a3f0457ad539656016382ef9"
= 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 = { 66890c4500e82e00 40 ebe8 33c0 8945e4 3d01010000 }
$sequence_1 = { 837df000 740d 8b4df0 e8???????? 8945e4 eb07 c745e400000000 }
$sequence_2 = { e8???????? 83c410 8b4d28 c70103800000 0fb65534 }
$sequence_3 = { 51 8d55f8 52 8d45f4 50 8b0d???????? 51 }
$sequence_4 = { e8???????? 83c40c 6804010000 8d85ecfdffff 50 8d8df0feffff }
$sequence_5 = { 50 e8???????? 83c408 eb6a 6804010000 8b0d???????? 51 }
$sequence_6 = { c68567fbffffe9 c68568fbffff0d c68569fbffff0c c6856afbffff53 c6856bfbffffeb c6856cfbffff14 c6856dfbffff9c }
$sequence_7 = { 89853cfeffff 83bd3cfeffff00 7407 32c0 e9???????? 8b5508 }
$sequence_8 = { 8d8dc8f4ffff 51 8b95ccfcffff 52 ff15???????? 6a00 8d856cf2ffff }
$sequence_9 = { 83ec0c c745f801000000 68c8000000 e8???????? 83c404 }
condition:
7 of them and filesize < 294912
}
Strings (10 patterns)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $sequence_0 | hex | { 66890c4500e82e00 40 ebe8 33c0 8945e4 3d01010000 } | |
| $sequence_1 | hex | { 837df000 740d 8b4df0 e8???????? 8945e4 eb07 c745e400000000 } | |
| $sequence_2 | hex | { e8???????? 83c410 8b4d28 c70103800000 0fb65534 } | |
| $sequence_3 | hex | { 51 8d55f8 52 8d45f4 50 8b0d???????? 51 } | |
| $sequence_4 | hex | { e8???????? 83c40c 6804010000 8d85ecfdffff 50 8d8df0feffff } | |
| $sequence_5 | hex | { 50 e8???????? 83c408 eb6a 6804010000 8b0d???????? 51 } | |
| $sequence_6 | hex | { c68567fbffffe9 c68568fbffff0d c68569fbffff0c c6856afbffff53 c6856bfbffffeb c6856cfbffff14 c6856dfbffff9c } | |
| $sequence_7 | hex | { 89853cfeffff 83bd3cfeffff00 7407 32c0 e9???????? 8b5508 } | |
| $sequence_8 | hex | { 8d8dc8f4ffff 51 8b95ccfcffff 52 ff15???????? 6a00 8d856cf2ffff } | |
| $sequence_9 | hex | { 83ec0c c745f801000000 68c8000000 e8???????? 83c404 } |
Condition
7 of them and filesize < 294912In plain words (Heuristic)
- The file must be smaller than 294912 (a cheap guard that skips large files).
- At least 7 patterns in the rule must match.
Test this rule in your browser
Drop a file to scan it with this rule using YARA-X compiled to WebAssembly. Nothing is uploaded.
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: dc096f6e-ea1d-5470-8866-51bf722773fb
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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