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MALPEDIA_Win_Karius_Auto

autogenerated rule brought to you by yara-signator

MalwareKariusMalpedia 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 / 73

What this rule detects

autogenerated rule brought to you by yara-signator

Associated malware family: Karius.

It defines 26 patterns (0 text, 26 hex, 0 regex).

Summary generated from the rule's metadata and condition.

Rule source

win-karius-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Karius_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "3cb1d9ad-d5c4-549f-a1ce-94ef7a14a515"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.karius"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.karius_auto.yar#L1-L245"
		license_url = "N/A"
		logic_hash = "42a51763e275d73b90477c335b593ab917c6a5ba4d2c7362206c1d4f1e01c051"
		score = 75
		quality = 73
		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 = { 488b05???????? 4885c0 7512 ff15???????? }
		$sequence_1 = { 0f8477000000 8bb424b0000000 418b10 8bcd 4903d6 }
		$sequence_2 = { 418b5b18 85db 0f849d000000 41837b1400 0f8492000000 458b4320 }
		$sequence_3 = { 0f8492000000 458b4320 458b5324 33ed }
		$sequence_4 = { 41b830000000 488bcf ff15???????? 4885c0 }
		$sequence_5 = { 33ed 4d03c6 4d03d6 448bcd 85db 0f8477000000 8bb424b0000000 }
		$sequence_6 = { 0f84b3000000 458b9f88000000 4d03de 418b5b18 85db 0f849d000000 }
		$sequence_7 = { c3 85c0 7505 e8???????? b801000000 }
		$sequence_8 = { 8bd7 498bce ffd3 4183bf8c00000000 0f84b3000000 458b9f88000000 4d03de }
		$sequence_9 = { ff15???????? 488bf8 4885c0 7505 8d4701 }
		$sequence_10 = { 7407 3c20 7703 46 75f3 803e5d }
		$sequence_11 = { 3a06 7522 42 46 }
		$sequence_12 = { 448bc0 33d2 488bce ff15???????? 4c8bf0 4885c0 }
		$sequence_13 = { 4d8bcf 33d2 41b800001000 488bce ff15???????? 488bd8 }
		$sequence_14 = { 488bc8 ff15???????? 4c8be8 498bce }
		$sequence_15 = { 488d4b10 488d542450 41b804000000 c6430f68 }
		$sequence_16 = { 42 46 83fa05 7cf2 33c0 }
		$sequence_17 = { 56 57 e8???????? 8bc8 83c40c 85c9 0f8485000000 }
		$sequence_18 = { 8d7b01 448bfb 448be3 4885c9 }
		$sequence_19 = { 7405 f60001 7502 33c0 }
		$sequence_20 = { f7d8 8945fc 8955f4 85db 7407 3bd3 }
		$sequence_21 = { 42 ff45f8 894d08 e9???????? 8b45f8 5f }
		$sequence_22 = { 4d8bcc 4d8bc7 488bd0 488bce ff15???????? 85c0 }
		$sequence_23 = { 0f93c0 eb06 803900 0f94c0 }
		$sequence_24 = { 4c8be8 498bce ff15???????? 4d85ed }
		$sequence_25 = { e9???????? 8b4510 5e 8908 }

	condition:
		7 of them and filesize < 434176
}

Strings (26 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ 488b05???????? 4885c0 7512 ff15???????? }
$sequence_1hex{ 0f8477000000 8bb424b0000000 418b10 8bcd 4903d6 }
$sequence_2hex{ 418b5b18 85db 0f849d000000 41837b1400 0f8492000000 458b4320 }
$sequence_3hex{ 0f8492000000 458b4320 458b5324 33ed }
$sequence_4hex{ 41b830000000 488bcf ff15???????? 4885c0 }
$sequence_5hex{ 33ed 4d03c6 4d03d6 448bcd 85db 0f8477000000 8bb424b0000000 }
$sequence_6hex{ 0f84b3000000 458b9f88000000 4d03de 418b5b18 85db 0f849d000000 }
$sequence_7hex{ c3 85c0 7505 e8???????? b801000000 }
$sequence_8hex{ 8bd7 498bce ffd3 4183bf8c00000000 0f84b3000000 458b9f88000000 4d03de }
$sequence_9hex{ ff15???????? 488bf8 4885c0 7505 8d4701 }
$sequence_10hex{ 7407 3c20 7703 46 75f3 803e5d }
$sequence_11hex{ 3a06 7522 42 46 }
$sequence_12hex{ 448bc0 33d2 488bce ff15???????? 4c8bf0 4885c0 }
$sequence_13hex{ 4d8bcf 33d2 41b800001000 488bce ff15???????? 488bd8 }
$sequence_14hex{ 488bc8 ff15???????? 4c8be8 498bce }
$sequence_15hex{ 488d4b10 488d542450 41b804000000 c6430f68 }
$sequence_16hex{ 42 46 83fa05 7cf2 33c0 }
$sequence_17hex{ 56 57 e8???????? 8bc8 83c40c 85c9 0f8485000000 }
$sequence_18hex{ 8d7b01 448bfb 448be3 4885c9 }
$sequence_19hex{ 7405 f60001 7502 33c0 }
$sequence_20hex{ f7d8 8945fc 8955f4 85db 7407 3bd3 }
$sequence_21hex{ 42 ff45f8 894d08 e9???????? 8b45f8 5f }
$sequence_22hex{ 4d8bcc 4d8bc7 488bd0 488bce ff15???????? 85c0 }
$sequence_23hex{ 0f93c0 eb06 803900 0f94c0 }
$sequence_24hex{ 4c8be8 498bce ff15???????? 4d85ed }
$sequence_25hex{ e9???????? 8b4510 5e 8908 }

Condition

7 of them and filesize < 434176

In plain words (Heuristic)

  • The file must be smaller than 434176 (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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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: 3cb1d9ad-d5c4-549f-a1ce-94ef7a14a515

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