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MALPEDIA_Win_Rook_Auto

autogenerated rule brought to you by yara-signator

MalwareRookMalpedia 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: Rook.

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

Summary generated from the rule's metadata and condition.

Rule source

win-rook-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Rook_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "7e9a00fa-9e37-5ee8-b49d-e7d22fd8a3c0"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.rook"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.rook_auto.yar#L1-L123"
		license_url = "N/A"
		logic_hash = "4f6e306547a8e1ee48d3e89d6bd542536f9fe68149b73057a1b43a088743f030"
		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 = { eb07 488d1d1a030200 4883a4249800000000 4084f6 }
		$sequence_1 = { 33d2 33c9 448d4207 ff15???????? 488d4c2440 ff15???????? 8b442460 }
		$sequence_2 = { 488bd3 4533c0 498bcc ff15???????? }
		$sequence_3 = { 488d0dbebb0400 4c89642420 e8???????? 498bcd ff15???????? 448bc0 8905???????? }
		$sequence_4 = { 488987a8000000 488d05749c0200 c7879800000001000000 48c787a000000004000000 48894760 488d055c990200 }
		$sequence_5 = { 4883eb01 7582 4183c9ff 41b801000000 498bd4 8bcf ff15???????? }
		$sequence_6 = { 48897c2420 ff15???????? 4863d8 488bcb e8???????? 498bce }
		$sequence_7 = { c5f1eb0d???????? 4c8d0d169f0000 c5f35cca c4c173590cc1 4c8d0de58e0000 }
		$sequence_8 = { 7407 e8???????? eb09 488b4918 e8???????? ffc3 }
		$sequence_9 = { 488d54246c 488bcd ff15???????? f644244010 0f851f020000 488d153bab0400 488d4c246c }

	condition:
		7 of them and filesize < 843776
}

Strings (10 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ eb07 488d1d1a030200 4883a4249800000000 4084f6 }
$sequence_1hex{ 33d2 33c9 448d4207 ff15???????? 488d4c2440 ff15???????? 8b442460 }
$sequence_2hex{ 488bd3 4533c0 498bcc ff15???????? }
$sequence_3hex{ 488d0dbebb0400 4c89642420 e8???????? 498bcd ff15???????? 448bc0 8905???????? }
$sequence_4hex{ 488987a8000000 488d05749c0200 c7879800000001000000 48c787a000000004000000 48894760 488d055c990200 }
$sequence_5hex{ 4883eb01 7582 4183c9ff 41b801000000 498bd4 8bcf ff15???????? }
$sequence_6hex{ 48897c2420 ff15???????? 4863d8 488bcb e8???????? 498bce }
$sequence_7hex{ c5f1eb0d???????? 4c8d0d169f0000 c5f35cca c4c173590cc1 4c8d0de58e0000 }
$sequence_8hex{ 7407 e8???????? eb09 488b4918 e8???????? ffc3 }
$sequence_9hex{ 488d54246c 488bcd ff15???????? f644244010 0f851f020000 488d153bab0400 488d4c246c }

Condition

7 of them and filesize < 843776

In plain words (Heuristic)

  • The file must be smaller than 843776 (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: 7e9a00fa-9e37-5ee8-b49d-e7d22fd8a3c0

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