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MALPEDIA_Win_Kivars_Auto

autogenerated rule brought to you by yara-signator

MalwareKivarsMalpedia 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: Kivars.

It defines 16 patterns (0 text, 16 hex, 0 regex).

Summary generated from the rule's metadata and condition.

Rule source

win-kivars-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Kivars_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "e3629ab6-6c44-5699-b846-61a8ef3e4e0a"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.kivars"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.kivars_auto.yar#L1-L168"
		license_url = "N/A"
		logic_hash = "39fdab25349f39ee4ae2444df4528b7d0d4bb9e7503fd39f5d68889aebe8ec6d"
		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 = { 48c744242000000000 41b918000000 4c8d442430 33d2 488b4c2448 ff15???????? }
		$sequence_1 = { 41b802000000 488d942470040000 488b8c2478080000 e8???????? 89842480080000 }
		$sequence_2 = { 488b8c2410030000 ff15???????? 488d1510390000 488b8c2410030000 }
		$sequence_3 = { 668944243c 0fb744243c 488b4c2448 0fb74906 }
		$sequence_4 = { 51 6a01 68???????? 68???????? 6801000080 e8???????? 83c414 }
		$sequence_5 = { 8984241c010000 0f843b010000 56 57 89442414 }
		$sequence_6 = { c644247069 c6442471b1 c644247217 c644247363 c6442474bd }
		$sequence_7 = { 52 e8???????? 8b442420 8b4c2428 57 56 50 }
		$sequence_8 = { 8905???????? b001 e9???????? 488d8c2498020000 e8???????? 48c784245802000000000000 }
		$sequence_9 = { 8d55dc 52 681f000200 50 57 56 }
		$sequence_10 = { 8d8c2420030000 51 50 ff15???????? 85c0 }
		$sequence_11 = { ff15???????? 8d9424a4020000 52 ff15???????? 80bc04a30200005c }
		$sequence_12 = { ff15???????? 85c0 89442410 0f848d000000 8b8c2418020000 }
		$sequence_13 = { 837c242400 0f8caa040000 8b842440010000 ffc8 8bc0 }
		$sequence_14 = { c684248000000025 c684248100000026 c684248200000027 c684248300000028 c684248400000029 c68424850000002a }
		$sequence_15 = { ff15???????? 89842490050000 ff15???????? 8b8c2490050000 0fafc8 }

	condition:
		7 of them and filesize < 196608
}

Strings (16 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ 48c744242000000000 41b918000000 4c8d442430 33d2 488b4c2448 ff15???????? }
$sequence_1hex{ 41b802000000 488d942470040000 488b8c2478080000 e8???????? 89842480080000 }
$sequence_2hex{ 488b8c2410030000 ff15???????? 488d1510390000 488b8c2410030000 }
$sequence_3hex{ 668944243c 0fb744243c 488b4c2448 0fb74906 }
$sequence_4hex{ 51 6a01 68???????? 68???????? 6801000080 e8???????? 83c414 }
$sequence_5hex{ 8984241c010000 0f843b010000 56 57 89442414 }
$sequence_6hex{ c644247069 c6442471b1 c644247217 c644247363 c6442474bd }
$sequence_7hex{ 52 e8???????? 8b442420 8b4c2428 57 56 50 }
$sequence_8hex{ 8905???????? b001 e9???????? 488d8c2498020000 e8???????? 48c784245802000000000000 }
$sequence_9hex{ 8d55dc 52 681f000200 50 57 56 }
$sequence_10hex{ 8d8c2420030000 51 50 ff15???????? 85c0 }
$sequence_11hex{ ff15???????? 8d9424a4020000 52 ff15???????? 80bc04a30200005c }
$sequence_12hex{ ff15???????? 85c0 89442410 0f848d000000 8b8c2418020000 }
$sequence_13hex{ 837c242400 0f8caa040000 8b842440010000 ffc8 8bc0 }
$sequence_14hex{ c684248000000025 c684248100000026 c684248200000027 c684248300000028 c684248400000029 c68424850000002a }
$sequence_15hex{ ff15???????? 89842490050000 ff15???????? 8b8c2490050000 0fafc8 }

Condition

7 of them and filesize < 196608

In plain words (Heuristic)

  • The file must be smaller than 196608 (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.

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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: e3629ab6-6c44-5699-b846-61a8ef3e4e0a

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