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MALPEDIA_Win_Kapeka_Auto

autogenerated rule brought to you by yara-signator

MalwareKapekaMalpedia 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: Kapeka.

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

Summary generated from the rule's metadata and condition.

Rule source

win-kapeka-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Kapeka_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "9683a497-daa1-5a3d-af3c-333183ec614a"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.kapeka"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.kapeka_auto.yar#L1-L128"
		license_url = "N/A"
		logic_hash = "27a466079b0dd09d81ca32f591f191fcd05f3e9c6d49a2bd744df9f52ff21a67"
		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 = { 668901 498b4740 498d4f40 ff5010 488d0d5b780000 e8???????? }
		$sequence_1 = { 4923f7 440fb6ca 458bc4 488bd6 488bcf e8???????? e9???????? }
		$sequence_2 = { 884c0424 8b442420 ffc0 89442420 837c242004 0f859a010000 }
		$sequence_3 = { 4885ff 7409 488bcf ff15???????? 48c70300000000 488b5c2430 4883c420 }
		$sequence_4 = { 488d1549be0000 488bcd e8???????? 8b5650 488bcd e8???????? 488d0d3fbe0000 }
		$sequence_5 = { 488d0de4520100 c745c720002f00 c745cb63002000 66895dcf e8???????? }
		$sequence_6 = { 410fb6c0 33b48d70ee0100 33b48570f20100 41337608 410fb6c1 418bc8 }
		$sequence_7 = { ba01000000 488bcb ff10 4c397c2450 740b 488b4c2468 }
		$sequence_8 = { e8???????? 488d4dd7 488bf8 e8???????? 4885c0 740a 488bc8 }
		$sequence_9 = { 4133b48470e60100 410fb6c3 4133b48470f20100 418bc0 41337610 c1e808 0fb6c8 }

	condition:
		7 of them and filesize < 377856
}

Strings (10 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ 668901 498b4740 498d4f40 ff5010 488d0d5b780000 e8???????? }
$sequence_1hex{ 4923f7 440fb6ca 458bc4 488bd6 488bcf e8???????? e9???????? }
$sequence_2hex{ 884c0424 8b442420 ffc0 89442420 837c242004 0f859a010000 }
$sequence_3hex{ 4885ff 7409 488bcf ff15???????? 48c70300000000 488b5c2430 4883c420 }
$sequence_4hex{ 488d1549be0000 488bcd e8???????? 8b5650 488bcd e8???????? 488d0d3fbe0000 }
$sequence_5hex{ 488d0de4520100 c745c720002f00 c745cb63002000 66895dcf e8???????? }
$sequence_6hex{ 410fb6c0 33b48d70ee0100 33b48570f20100 41337608 410fb6c1 418bc8 }
$sequence_7hex{ ba01000000 488bcb ff10 4c397c2450 740b 488b4c2468 }
$sequence_8hex{ e8???????? 488d4dd7 488bf8 e8???????? 4885c0 740a 488bc8 }
$sequence_9hex{ 4133b48470e60100 410fb6c3 4133b48470f20100 418bc0 41337610 c1e808 0fb6c8 }

Condition

7 of them and filesize < 377856

In plain words (Heuristic)

  • The file must be smaller than 377856 (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: 9683a497-daa1-5a3d-af3c-333183ec614a

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