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MALPEDIA_Win_Rokku_Auto

autogenerated rule brought to you by yara-signator

MalwareRokkuMalpedia 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: Rokku.

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

Summary generated from the rule's metadata and condition.

Rule source

win-rokku-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Rokku_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "a5feb178-c735-508e-a0f8-0bfcbe692e7b"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.rokku"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.rokku_auto.yar#L1-L128"
		license_url = "N/A"
		logic_hash = "e2bf74104beac743ec38bdbe73eb38f6365a43d5359a716e4280a8e578384cb8"
		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 = { 8bcf 0facc808 33d2 c1e618 0bd0 c1e908 }
		$sequence_1 = { 53 bfe9fd0000 8bf2 57 }
		$sequence_2 = { 0f85e3feffff 8b7c2424 8d442430 33d2 52 52 }
		$sequence_3 = { f76c2438 03e8 8b442474 13da f76c2448 03e8 13da }
		$sequence_4 = { 8b44240c 56 8b721c 57 8b4824 f7de }
		$sequence_5 = { 7509 83433801 7503 ff433c 5f 5e 5d }
		$sequence_6 = { 0facf919 8bea ba42db0100 c1ff19 897c2430 8bf8 8b442410 }
		$sequence_7 = { f76c2438 898c24c0000000 8bf8 8bea 8b44246c f76c2460 03f8 }
		$sequence_8 = { 8b442468 894d18 8b4c2418 0fa4c119 8b4c244c c1e019 2bf8 }
		$sequence_9 = { 397218 744c 8b5a30 8be9 0fbe7d00 45 0fb70b }

	condition:
		7 of them and filesize < 548864
}

Strings (10 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ 8bcf 0facc808 33d2 c1e618 0bd0 c1e908 }
$sequence_1hex{ 53 bfe9fd0000 8bf2 57 }
$sequence_2hex{ 0f85e3feffff 8b7c2424 8d442430 33d2 52 52 }
$sequence_3hex{ f76c2438 03e8 8b442474 13da f76c2448 03e8 13da }
$sequence_4hex{ 8b44240c 56 8b721c 57 8b4824 f7de }
$sequence_5hex{ 7509 83433801 7503 ff433c 5f 5e 5d }
$sequence_6hex{ 0facf919 8bea ba42db0100 c1ff19 897c2430 8bf8 8b442410 }
$sequence_7hex{ f76c2438 898c24c0000000 8bf8 8bea 8b44246c f76c2460 03f8 }
$sequence_8hex{ 8b442468 894d18 8b4c2418 0fa4c119 8b4c244c c1e019 2bf8 }
$sequence_9hex{ 397218 744c 8b5a30 8be9 0fbe7d00 45 0fb70b }

Condition

7 of them and filesize < 548864

In plain words (Heuristic)

  • The file must be smaller than 548864 (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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Drop a file here or click to chooseScanned locally with YARA-X. Files up to 200 MB.

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: a5feb178-c735-508e-a0f8-0bfcbe692e7b

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