YARA · Malpedia signator rules
MALPEDIA_Win_Astarion_Rat_Auto
autogenerated rule brought to you by yara-signator
MalwareAstarion RatMalpedia 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: Astarion Rat.
It defines 10 patterns (0 text, 10 hex, 0 regex).
Summary generated from the rule's metadata and condition.
Rule source
win-astarion-rat-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Astarion_Rat_Auto : FILE
{
meta:
= "autogenerated rule brought to you by yara-signator"
= "Felix Bilstein - yara-signator at cocacoding dot com"
= "8d9eb3c4-eb44-59c0-a510-1aa8f6d16eb2"
= "2026-05-04"
= "2026-05-18"
= "https://malpedia.caad.fkie.fraunhofer.de/details/win.astarion_rat"
= "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.astarion_rat_auto.yar#L1-L129"
= "N/A"
= "b688494e5660adbde71574cd27307fc450493b8cd768be8ac6dc24b5a472c85d"
= 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???????? 488b4f48 e8???????? 488bcf e8???????? 4c8b642448 488b6c2458 }
$sequence_1 = { 85c0 7506 8885f0010000 8b4c2478 488d542450 ff15???????? 85c0 }
$sequence_2 = { 0f2805???????? 0f298de0000000 0f280d???????? 66898518010000 0fb605???????? 0f298520010000 0f2805???????? }
$sequence_3 = { 488945f8 48b843004d0044000000 48894550 488d4558 c745a068000000 66897de0 c745dc01010000 }
$sequence_4 = { 4c8d053b880100 488d153c880100 e8???????? 4885c0 740f 488bcb 4883c420 }
$sequence_5 = { e8???????? 488bce e9???????? ff15???????? 488b442460 4533c9 }
$sequence_6 = { e8???????? eb1c 4533c9 488bd7 4533c0 }
$sequence_7 = { ff15???????? 85c0 0f8862010000 ba02000000 4489642428 8bca }
$sequence_8 = { eb08 468bbc0d28010000 488bce ff15???????? 418bcf ff15???????? }
$sequence_9 = { 488b4e48 e8???????? 488b4e50 e8???????? 488b4e58 e8???????? 488b4e60 }
condition:
7 of them and filesize < 462848
}
Strings (10 patterns)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $sequence_0 | hex | { e8???????? 488b4f48 e8???????? 488bcf e8???????? 4c8b642448 488b6c2458 } | |
| $sequence_1 | hex | { 85c0 7506 8885f0010000 8b4c2478 488d542450 ff15???????? 85c0 } | |
| $sequence_2 | hex | { 0f2805???????? 0f298de0000000 0f280d???????? 66898518010000 0fb605???????? 0f298520010000 0f2805???????? } | |
| $sequence_3 | hex | { 488945f8 48b843004d0044000000 48894550 488d4558 c745a068000000 66897de0 c745dc01010000 } | |
| $sequence_4 | hex | { 4c8d053b880100 488d153c880100 e8???????? 4885c0 740f 488bcb 4883c420 } | |
| $sequence_5 | hex | { e8???????? 488bce e9???????? ff15???????? 488b442460 4533c9 } | |
| $sequence_6 | hex | { e8???????? eb1c 4533c9 488bd7 4533c0 } | |
| $sequence_7 | hex | { ff15???????? 85c0 0f8862010000 ba02000000 4489642428 8bca } | |
| $sequence_8 | hex | { eb08 468bbc0d28010000 488bce ff15???????? 418bcf ff15???????? } | |
| $sequence_9 | hex | { 488b4e48 e8???????? 488b4e50 e8???????? 488b4e58 e8???????? 488b4e60 } |
Condition
7 of them and filesize < 462848In plain words (Heuristic)
- The file must be smaller than 462848 (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: 8d9eb3c4-eb44-59c0-a510-1aa8f6d16eb2
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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