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MALPEDIA_Win_Kk_Rat_Auto

autogenerated rule brought to you by yara-signator

MalwareKk 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: Kk Rat.

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

Summary generated from the rule's metadata and condition.

Rule source

win-kk-rat-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Kk_Rat_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "79291885-85fb-5a77-8dbf-2c220d758ab5"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.kk_rat"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.kk_rat_auto.yar#L1-L131"
		license_url = "N/A"
		logic_hash = "c23e0931edfbb07c0f52ba542598531acaac2db7d50ece50da5c69134a8a5ceb"
		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 = { 0f84030d0000 0fb602 ff4dfc 8bce d3e0 42 83c608 }
		$sequence_1 = { b8???????? e9???????? 8d8de0fdffff e9???????? 8b542408 8d420c 8b8adcfdffff }
		$sequence_2 = { 33d2 8bc1 5f f7f7 8bc1 83e01f 85d2 }
		$sequence_3 = { 83fb20 750a bf???????? e9???????? 83fb09 750a bf???????? }
		$sequence_4 = { 58 8985c0fdffff 8985bcfdffff 8d85c8fdffff 50 8d45cc }
		$sequence_5 = { 8b10 8bc8 ff5208 8845fc 56 8b7508 57 }
		$sequence_6 = { c7459475654100 8d4588 50 8d45d4 50 }
		$sequence_7 = { 6a08 e8???????? c74628a0e51210 8b4620 a900800000 7408 0d00400000 }
		$sequence_8 = { 39be200e0000 7431 57 c745ece8d31310 e8???????? 8bd8 895df0 }
		$sequence_9 = { 7d08 8bc3 c1f810 8807 47 837dfc02 7d08 }

	condition:
		7 of them and filesize < 3516416
}

Strings (10 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ 0f84030d0000 0fb602 ff4dfc 8bce d3e0 42 83c608 }
$sequence_1hex{ b8???????? e9???????? 8d8de0fdffff e9???????? 8b542408 8d420c 8b8adcfdffff }
$sequence_2hex{ 33d2 8bc1 5f f7f7 8bc1 83e01f 85d2 }
$sequence_3hex{ 83fb20 750a bf???????? e9???????? 83fb09 750a bf???????? }
$sequence_4hex{ 58 8985c0fdffff 8985bcfdffff 8d85c8fdffff 50 8d45cc }
$sequence_5hex{ 8b10 8bc8 ff5208 8845fc 56 8b7508 57 }
$sequence_6hex{ c7459475654100 8d4588 50 8d45d4 50 }
$sequence_7hex{ 6a08 e8???????? c74628a0e51210 8b4620 a900800000 7408 0d00400000 }
$sequence_8hex{ 39be200e0000 7431 57 c745ece8d31310 e8???????? 8bd8 895df0 }
$sequence_9hex{ 7d08 8bc3 c1f810 8807 47 837dfc02 7d08 }

Condition

7 of them and filesize < 3516416

In plain words (Heuristic)

  • The file must be smaller than 3516416 (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: 79291885-85fb-5a77-8dbf-2c220d758ab5

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