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MALPEDIA_Win_Arik_Keylogger_Auto

autogenerated rule brought to you by yara-signator

MalwareArik KeyloggerMalpedia 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: Arik Keylogger.

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

Summary generated from the rule's metadata and condition.

Rule source

win-arik-keylogger-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Arik_Keylogger_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "b0311ca3-627a-5968-b029-012ac51a5f7c"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.arik_keylogger"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.arik_keylogger_auto.yar#L1-L134"
		license_url = "N/A"
		logic_hash = "592a4c082fb68dfba79c1bf1a643e4af63cabe72de760074843b8d1125833f72"
		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 = { b8???????? e8???????? 83f801 0f85cb000000 8d45b8 e8???????? c745b800000000 }
		$sequence_1 = { 8d45c4 b100 ba30000000 e8???????? 803d????????00 7410 c745c42c000000 }
		$sequence_2 = { db7dc0 8d55c0 8955ec c745e803000000 dd4508 db7db0 8d55b0 }
		$sequence_3 = { 8975b4 897db8 8945fc 8b4508 e8???????? c745bc00000000 8d4ddc }
		$sequence_4 = { 8b835c010000 39f0 0f8486000000 85f6 7430 89f2 b8???????? }
		$sequence_5 = { ff92e8000000 89d8 ba0a000000 e8???????? eb17 8b8354010000 83f80a }
		$sequence_6 = { ff45b8 e9???????? 8b4510 8b00 8b5580 8b0490 40 }
		$sequence_7 = { ff75f8 6898010000 ff75ec e8???????? 83f8ff 7406 c645f001 }
		$sequence_8 = { 7426 48 743e 48 7461 e9???????? 8b4df0 }
		$sequence_9 = { ff5178 8b55d4 a1???????? 8b0d???????? 8b09 ff91c8000000 89c7 }

	condition:
		7 of them and filesize < 4947968
}

Strings (10 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ b8???????? e8???????? 83f801 0f85cb000000 8d45b8 e8???????? c745b800000000 }
$sequence_1hex{ 8d45c4 b100 ba30000000 e8???????? 803d????????00 7410 c745c42c000000 }
$sequence_2hex{ db7dc0 8d55c0 8955ec c745e803000000 dd4508 db7db0 8d55b0 }
$sequence_3hex{ 8975b4 897db8 8945fc 8b4508 e8???????? c745bc00000000 8d4ddc }
$sequence_4hex{ 8b835c010000 39f0 0f8486000000 85f6 7430 89f2 b8???????? }
$sequence_5hex{ ff92e8000000 89d8 ba0a000000 e8???????? eb17 8b8354010000 83f80a }
$sequence_6hex{ ff45b8 e9???????? 8b4510 8b00 8b5580 8b0490 40 }
$sequence_7hex{ ff75f8 6898010000 ff75ec e8???????? 83f8ff 7406 c645f001 }
$sequence_8hex{ 7426 48 743e 48 7461 e9???????? 8b4df0 }
$sequence_9hex{ ff5178 8b55d4 a1???????? 8b0d???????? 8b09 ff91c8000000 89c7 }

Condition

7 of them and filesize < 4947968

In plain words (Heuristic)

  • The file must be smaller than 4947968 (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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Open in editor

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: b0311ca3-627a-5968-b029-012ac51a5f7c

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