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MALPEDIA_Win_Ruckguv_Auto

autogenerated rule brought to you by yara-signator

MalwareRuckguvMalpedia 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: Ruckguv.

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

Summary generated from the rule's metadata and condition.

Rule source

win-ruckguv-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Ruckguv_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "a3926da9-97d4-5c70-97f8-77af66641269"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.ruckguv"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.ruckguv_auto.yar#L1-L126"
		license_url = "N/A"
		logic_hash = "bd33d6f723961a50547735b694a0e61de28f94951db04f9854c4c4eb5b1ef5c3"
		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 = { 53 56 fe4513 0fb64d13 8d3401 8a16 0055ff }
		$sequence_1 = { 50 e8???????? 59 50 e8???????? 68???????? 50 }
		$sequence_2 = { 8b4834 3bf1 7504 b001 eb7c 8b80a0000000 }
		$sequence_3 = { 6a01 e8???????? 83c428 8d8da0feffff 51 }
		$sequence_4 = { 05f8000000 813f50450000 894508 0f851c010000 8b5f50 68fe6a7a69 }
		$sequence_5 = { 0fb645fe 03c1 8a18 fe45ff 881e 8810 660fb645ff }
		$sequence_6 = { 8d859cfdffff 50 68???????? e8???????? 6814f1f808 6a01 897558 }
		$sequence_7 = { 59 eb1e 8d45d0 ebeb 8d45b4 }
		$sequence_8 = { 8b37 85f6 7503 8b7710 03f3 }
		$sequence_9 = { 53 33d2 56 57 8855ff 8855fe 889100010000 }

	condition:
		7 of them and filesize < 41024
}

Strings (10 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ 53 56 fe4513 0fb64d13 8d3401 8a16 0055ff }
$sequence_1hex{ 50 e8???????? 59 50 e8???????? 68???????? 50 }
$sequence_2hex{ 8b4834 3bf1 7504 b001 eb7c 8b80a0000000 }
$sequence_3hex{ 6a01 e8???????? 83c428 8d8da0feffff 51 }
$sequence_4hex{ 05f8000000 813f50450000 894508 0f851c010000 8b5f50 68fe6a7a69 }
$sequence_5hex{ 0fb645fe 03c1 8a18 fe45ff 881e 8810 660fb645ff }
$sequence_6hex{ 8d859cfdffff 50 68???????? e8???????? 6814f1f808 6a01 897558 }
$sequence_7hex{ 59 eb1e 8d45d0 ebeb 8d45b4 }
$sequence_8hex{ 8b37 85f6 7503 8b7710 03f3 }
$sequence_9hex{ 53 33d2 56 57 8855ff 8855fe 889100010000 }

Condition

7 of them and filesize < 41024

In plain words (Heuristic)

  • The file must be smaller than 41024 (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: a3926da9-97d4-5c70-97f8-77af66641269

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