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MALPEDIA_Win_Kdcsponge_Auto

autogenerated rule brought to you by yara-signator

MalwareKdcspongeMalpedia 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: Kdcsponge.

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

Summary generated from the rule's metadata and condition.

Rule source

win-kdcsponge-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Kdcsponge_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "d2b2a073-5815-5a1f-88d5-a9feead1108f"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.kdcsponge"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.kdcsponge_auto.yar#L1-L131"
		license_url = "N/A"
		logic_hash = "d05489522f7f815e9a7a1406ca3b374411d8cb4e8f7daf4ac0bc6f9e3d44a2ba"
		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 = { 89442430 0f84b2000000 488d4c2420 e8???????? 85c0 746c 488b858c030000 }
		$sequence_1 = { 440fb693ad040000 4584d2 750c c783ca04000004000000 eb25 4180fa01 }
		$sequence_2 = { 89816c030000 4883c420 5b c3 48897c2430 8bb93c040000 c7813c04000010000000 }
		$sequence_3 = { 488903 488b0b e8???????? 4898 488907 b801000000 eb4e }
		$sequence_4 = { e8???????? 4881c478040000 5f 5e 5d 5b c3 }
		$sequence_5 = { 498d4202 493bc0 738e 4863824c040000 4c8d052403feff 498bc9 4883c428 }
		$sequence_6 = { 48c781e401000000000200 48c7811402000001000000 48c7811c02000020000000 83f840 751e }
		$sequence_7 = { ba00001400 0f44ca 83c102 80bbb2040000c4 894b60 7513 80bba404000001 }
		$sequence_8 = { 740e 80bbae0400000f 750e 80f901 7518 80bbbc0400000f 740a }
		$sequence_9 = { 0f94c1 83c167 898b40040000 3c01 ba40000000 b920000000 0f44ca }

	condition:
		7 of them and filesize < 720896
}

Strings (10 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ 89442430 0f84b2000000 488d4c2420 e8???????? 85c0 746c 488b858c030000 }
$sequence_1hex{ 440fb693ad040000 4584d2 750c c783ca04000004000000 eb25 4180fa01 }
$sequence_2hex{ 89816c030000 4883c420 5b c3 48897c2430 8bb93c040000 c7813c04000010000000 }
$sequence_3hex{ 488903 488b0b e8???????? 4898 488907 b801000000 eb4e }
$sequence_4hex{ e8???????? 4881c478040000 5f 5e 5d 5b c3 }
$sequence_5hex{ 498d4202 493bc0 738e 4863824c040000 4c8d052403feff 498bc9 4883c428 }
$sequence_6hex{ 48c781e401000000000200 48c7811402000001000000 48c7811c02000020000000 83f840 751e }
$sequence_7hex{ ba00001400 0f44ca 83c102 80bbb2040000c4 894b60 7513 80bba404000001 }
$sequence_8hex{ 740e 80bbae0400000f 750e 80f901 7518 80bbbc0400000f 740a }
$sequence_9hex{ 0f94c1 83c167 898b40040000 3c01 ba40000000 b920000000 0f44ca }

Condition

7 of them and filesize < 720896

In plain words (Heuristic)

  • The file must be smaller than 720896 (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: d2b2a073-5815-5a1f-88d5-a9feead1108f

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