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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:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "8d9eb3c4-eb44-59c0-a510-1aa8f6d16eb2"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.astarion_rat"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.astarion_rat_auto.yar#L1-L129"
		license_url = "N/A"
		logic_hash = "b688494e5660adbde71574cd27307fc450493b8cd768be8ac6dc24b5a472c85d"
		score = 75
		quality = 75
		tags = "FILE"
		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"

	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)

IdentifierTypeValueModifiers
$sequence_0hex{ e8???????? 488b4f48 e8???????? 488bcf e8???????? 4c8b642448 488b6c2458 }
$sequence_1hex{ 85c0 7506 8885f0010000 8b4c2478 488d542450 ff15???????? 85c0 }
$sequence_2hex{ 0f2805???????? 0f298de0000000 0f280d???????? 66898518010000 0fb605???????? 0f298520010000 0f2805???????? }
$sequence_3hex{ 488945f8 48b843004d0044000000 48894550 488d4558 c745a068000000 66897de0 c745dc01010000 }
$sequence_4hex{ 4c8d053b880100 488d153c880100 e8???????? 4885c0 740f 488bcb 4883c420 }
$sequence_5hex{ e8???????? 488bce e9???????? ff15???????? 488b442460 4533c9 }
$sequence_6hex{ e8???????? eb1c 4533c9 488bd7 4533c0 }
$sequence_7hex{ ff15???????? 85c0 0f8862010000 ba02000000 4489642428 8bca }
$sequence_8hex{ eb08 468bbc0d28010000 488bce ff15???????? 418bcf ff15???????? }
$sequence_9hex{ 488b4e48 e8???????? 488b4e50 e8???????? 488b4e58 e8???????? 488b4e60 }

Condition

7 of them and filesize < 462848

In 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.

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References

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)

Original rule

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

version1
toolyara-signator v0.6.0
signator_configcallsandjumps;datarefs;binvalue
malpedia_rule_date20260422
malpedia_hasha182e35da64e6d71cb55f125c4d4225196523f14
malpedia_version20260504
malpedia_licenseCC BY-SA 4.0
malpedia_sharingTLP:WHITE

Tags:FILE