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MALPEDIA_Win_Kugelblitz_Auto

autogenerated rule brought to you by yara-signator

MalwareKugelblitzMalpedia 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: Kugelblitz.

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

Summary generated from the rule's metadata and condition.

Rule source

win-kugelblitz-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Kugelblitz_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "f64354f5-4a94-5810-a35f-987cafd4bd97"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.kugelblitz"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.kugelblitz_auto.yar#L1-L113"
		license_url = "N/A"
		logic_hash = "59471ccdfb15903a9f2fa3b118377bbd14277cdcb24b0f2e5b2bde09d5d88951"
		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 = { 488d4b01 483bc8 0f87d8000000 4803c9 7513 }
		$sequence_1 = { e8???????? 8bc7 488b8d80000000 4833cc e8???????? 488bbc24b8010000 }
		$sequence_2 = { 66897c2456 4d85c0 7442 48c7c2ffffffff 660f1f440000 }
		$sequence_3 = { 4889b424a8010000 41b810010000 488d4c2470 e8???????? }
		$sequence_4 = { 83e801 0f85af000000 488d45d0 488b5de8 483945c8 488d45d8 }
		$sequence_5 = { 4883611000 488d05980f0000 48894108 488d057d0f0000 }
		$sequence_6 = { 48896c2440 4c8d4c2440 4c8d442438 488d542430 }
		$sequence_7 = { c705????????01000000 b808000000 486bc000 488d0d8d3f0000 }
		$sequence_8 = { 48ff25???????? 488d8a30000000 e9???????? 4055 4883ec20 488bea }
		$sequence_9 = { 488d158c150000 ff15???????? bf01000000 e9???????? 4c8bc6 }

	condition:
		7 of them and filesize < 82944
}

Strings (10 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ 488d4b01 483bc8 0f87d8000000 4803c9 7513 }
$sequence_1hex{ e8???????? 8bc7 488b8d80000000 4833cc e8???????? 488bbc24b8010000 }
$sequence_2hex{ 66897c2456 4d85c0 7442 48c7c2ffffffff 660f1f440000 }
$sequence_3hex{ 4889b424a8010000 41b810010000 488d4c2470 e8???????? }
$sequence_4hex{ 83e801 0f85af000000 488d45d0 488b5de8 483945c8 488d45d8 }
$sequence_5hex{ 4883611000 488d05980f0000 48894108 488d057d0f0000 }
$sequence_6hex{ 48896c2440 4c8d4c2440 4c8d442438 488d542430 }
$sequence_7hex{ c705????????01000000 b808000000 486bc000 488d0d8d3f0000 }
$sequence_8hex{ 48ff25???????? 488d8a30000000 e9???????? 4055 4883ec20 488bea }
$sequence_9hex{ 488d158c150000 ff15???????? bf01000000 e9???????? 4c8bc6 }

Condition

7 of them and filesize < 82944

In plain words (Heuristic)

  • The file must be smaller than 82944 (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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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: f64354f5-4a94-5810-a35f-987cafd4bd97

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