YARA · Malpedia signator rules
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:
= "autogenerated rule brought to you by yara-signator"
= "Felix Bilstein - yara-signator at cocacoding dot com"
= "d2b2a073-5815-5a1f-88d5-a9feead1108f"
= "2026-05-04"
= "2026-05-18"
= "https://malpedia.caad.fkie.fraunhofer.de/details/win.kdcsponge"
= "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.kdcsponge_auto.yar#L1-L131"
= "N/A"
= "d05489522f7f815e9a7a1406ca3b374411d8cb4e8f7daf4ac0bc6f9e3d44a2ba"
= 75
= 75
= "FILE"
= "1"
= "yara-signator v0.6.0"
= "callsandjumps;datarefs;binvalue"
= "20260422"
= "a182e35da64e6d71cb55f125c4d4225196523f14"
= "20260504"
= "CC BY-SA 4.0"
= "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)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $sequence_0 | hex | { 89442430 0f84b2000000 488d4c2420 e8???????? 85c0 746c 488b858c030000 } | |
| $sequence_1 | hex | { 440fb693ad040000 4584d2 750c c783ca04000004000000 eb25 4180fa01 } | |
| $sequence_2 | hex | { 89816c030000 4883c420 5b c3 48897c2430 8bb93c040000 c7813c04000010000000 } | |
| $sequence_3 | hex | { 488903 488b0b e8???????? 4898 488907 b801000000 eb4e } | |
| $sequence_4 | hex | { e8???????? 4881c478040000 5f 5e 5d 5b c3 } | |
| $sequence_5 | hex | { 498d4202 493bc0 738e 4863824c040000 4c8d052403feff 498bc9 4883c428 } | |
| $sequence_6 | hex | { 48c781e401000000000200 48c7811402000001000000 48c7811c02000020000000 83f840 751e } | |
| $sequence_7 | hex | { ba00001400 0f44ca 83c102 80bbb2040000c4 894b60 7513 80bba404000001 } | |
| $sequence_8 | hex | { 740e 80bbae0400000f 750e 80f901 7518 80bbbc0400000f 740a } | |
| $sequence_9 | hex | { 0f94c1 83c167 898b40040000 3c01 ba40000000 b920000000 0f44ca } |
Condition
7 of them and filesize < 720896In 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
Drop a file to scan it with this rule using YARA-X compiled to WebAssembly. Nothing is uploaded.
Drop a file here or click to chooseScanned locally with YARA-X. Files up to 200 MB.
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)
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
| 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 |
Tags:FILE
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