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MALPEDIA_Win_Archer_Rat_Auto

autogenerated rule brought to you by yara-signator

MalwareArcher 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: Archer Rat.

It defines 10 patterns (0 text, 10 hex, 0 regex).

Summary generated from the rule's metadata and condition.

Rule source

win-archer-rat-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Archer_Rat_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "9837935a-6948-55bc-923a-16560db69193"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.archer_rat"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.archer_rat_auto.yar#L1-L134"
		license_url = "N/A"
		logic_hash = "ae7af025c04aff01e3d2f0dd3c48a68d6dd407caa219f0bf97beb5b3d7883a05"
		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 = { ff5028 e8???????? 41c6460800 84db 0f8433040000 e8???????? 41b701 }
		$sequence_1 = { e9???????? 488bbc2420020000 488b9c2428020000 488d8c2420060000 e8???????? 4885db 7408 }
		$sequence_2 = { 7344 4989c7 4989d4 418a2c1e 48ffc3 4c8d0d26780c00 4c89f1 }
		$sequence_3 = { e9???????? 56 4883ec20 0fb68118050000 4883f805 0f87e8000000 4889ce }
		$sequence_4 = { ff5018 4883661000 4883c420 5e c3 56 57 }
		$sequence_5 = { f3a4 488d942438040000 488dbc24a0030000 448a4a08 488db42470010000 4889f1 4989f8 }
		$sequence_6 = { e8???????? 418a07 3c02 756b 4c8d7c2458 4c89f9 4889da }
		$sequence_7 = { f30f7f84242c0b0000 660f7f8424200b0000 6a20 5a b900040000 e8???????? 4889842400030000 }
		$sequence_8 = { 4c8d0533720600 4c89442420 4989c0 eb22 498b08 498b5008 4c8d054b720600 }
		$sequence_9 = { ebec 4883c428 5f 5e c3 80792002 0f85d5280200 }

	condition:
		7 of them and filesize < 2612224
}

Strings (10 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ ff5028 e8???????? 41c6460800 84db 0f8433040000 e8???????? 41b701 }
$sequence_1hex{ e9???????? 488bbc2420020000 488b9c2428020000 488d8c2420060000 e8???????? 4885db 7408 }
$sequence_2hex{ 7344 4989c7 4989d4 418a2c1e 48ffc3 4c8d0d26780c00 4c89f1 }
$sequence_3hex{ e9???????? 56 4883ec20 0fb68118050000 4883f805 0f87e8000000 4889ce }
$sequence_4hex{ ff5018 4883661000 4883c420 5e c3 56 57 }
$sequence_5hex{ f3a4 488d942438040000 488dbc24a0030000 448a4a08 488db42470010000 4889f1 4989f8 }
$sequence_6hex{ e8???????? 418a07 3c02 756b 4c8d7c2458 4c89f9 4889da }
$sequence_7hex{ f30f7f84242c0b0000 660f7f8424200b0000 6a20 5a b900040000 e8???????? 4889842400030000 }
$sequence_8hex{ 4c8d0533720600 4c89442420 4989c0 eb22 498b08 498b5008 4c8d054b720600 }
$sequence_9hex{ ebec 4883c428 5f 5e c3 80792002 0f85d5280200 }

Condition

7 of them and filesize < 2612224

In plain words (Heuristic)

  • The file must be smaller than 2612224 (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: 9837935a-6948-55bc-923a-16560db69193

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