YARA · Malpedia signator rules
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:
= "autogenerated rule brought to you by yara-signator"
= "Felix Bilstein - yara-signator at cocacoding dot com"
= "f64354f5-4a94-5810-a35f-987cafd4bd97"
= "2026-05-04"
= "2026-05-18"
= "https://malpedia.caad.fkie.fraunhofer.de/details/win.kugelblitz"
= "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.kugelblitz_auto.yar#L1-L113"
= "N/A"
= "59471ccdfb15903a9f2fa3b118377bbd14277cdcb24b0f2e5b2bde09d5d88951"
= 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 = { 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)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $sequence_0 | hex | { 488d4b01 483bc8 0f87d8000000 4803c9 7513 } | |
| $sequence_1 | hex | { e8???????? 8bc7 488b8d80000000 4833cc e8???????? 488bbc24b8010000 } | |
| $sequence_2 | hex | { 66897c2456 4d85c0 7442 48c7c2ffffffff 660f1f440000 } | |
| $sequence_3 | hex | { 4889b424a8010000 41b810010000 488d4c2470 e8???????? } | |
| $sequence_4 | hex | { 83e801 0f85af000000 488d45d0 488b5de8 483945c8 488d45d8 } | |
| $sequence_5 | hex | { 4883611000 488d05980f0000 48894108 488d057d0f0000 } | |
| $sequence_6 | hex | { 48896c2440 4c8d4c2440 4c8d442438 488d542430 } | |
| $sequence_7 | hex | { c705????????01000000 b808000000 486bc000 488d0d8d3f0000 } | |
| $sequence_8 | hex | { 48ff25???????? 488d8a30000000 e9???????? 4055 4883ec20 488bea } | |
| $sequence_9 | hex | { 488d158c150000 ff15???????? bf01000000 e9???????? 4c8bc6 } |
Condition
7 of them and filesize < 82944In 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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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: f64354f5-4a94-5810-a35f-987cafd4bd97
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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