YARA · Malpedia signator rules
MALPEDIA_Win_Kivars_Auto
autogenerated rule brought to you by yara-signator
- 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: Kivars.
It defines 16 patterns (0 text, 16 hex, 0 regex).
Summary generated from the rule's metadata and condition.
Rule source
win-kivars-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Kivars_Auto : FILE
{
meta:
= "autogenerated rule brought to you by yara-signator"
= "Felix Bilstein - yara-signator at cocacoding dot com"
= "e3629ab6-6c44-5699-b846-61a8ef3e4e0a"
= "2026-05-04"
= "2026-05-18"
= "https://malpedia.caad.fkie.fraunhofer.de/details/win.kivars"
= "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.kivars_auto.yar#L1-L168"
= "N/A"
= "39fdab25349f39ee4ae2444df4528b7d0d4bb9e7503fd39f5d68889aebe8ec6d"
= 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 = { 48c744242000000000 41b918000000 4c8d442430 33d2 488b4c2448 ff15???????? }
$sequence_1 = { 41b802000000 488d942470040000 488b8c2478080000 e8???????? 89842480080000 }
$sequence_2 = { 488b8c2410030000 ff15???????? 488d1510390000 488b8c2410030000 }
$sequence_3 = { 668944243c 0fb744243c 488b4c2448 0fb74906 }
$sequence_4 = { 51 6a01 68???????? 68???????? 6801000080 e8???????? 83c414 }
$sequence_5 = { 8984241c010000 0f843b010000 56 57 89442414 }
$sequence_6 = { c644247069 c6442471b1 c644247217 c644247363 c6442474bd }
$sequence_7 = { 52 e8???????? 8b442420 8b4c2428 57 56 50 }
$sequence_8 = { 8905???????? b001 e9???????? 488d8c2498020000 e8???????? 48c784245802000000000000 }
$sequence_9 = { 8d55dc 52 681f000200 50 57 56 }
$sequence_10 = { 8d8c2420030000 51 50 ff15???????? 85c0 }
$sequence_11 = { ff15???????? 8d9424a4020000 52 ff15???????? 80bc04a30200005c }
$sequence_12 = { ff15???????? 85c0 89442410 0f848d000000 8b8c2418020000 }
$sequence_13 = { 837c242400 0f8caa040000 8b842440010000 ffc8 8bc0 }
$sequence_14 = { c684248000000025 c684248100000026 c684248200000027 c684248300000028 c684248400000029 c68424850000002a }
$sequence_15 = { ff15???????? 89842490050000 ff15???????? 8b8c2490050000 0fafc8 }
condition:
7 of them and filesize < 196608
}
Strings (16 patterns)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $sequence_0 | hex | { 48c744242000000000 41b918000000 4c8d442430 33d2 488b4c2448 ff15???????? } | |
| $sequence_1 | hex | { 41b802000000 488d942470040000 488b8c2478080000 e8???????? 89842480080000 } | |
| $sequence_2 | hex | { 488b8c2410030000 ff15???????? 488d1510390000 488b8c2410030000 } | |
| $sequence_3 | hex | { 668944243c 0fb744243c 488b4c2448 0fb74906 } | |
| $sequence_4 | hex | { 51 6a01 68???????? 68???????? 6801000080 e8???????? 83c414 } | |
| $sequence_5 | hex | { 8984241c010000 0f843b010000 56 57 89442414 } | |
| $sequence_6 | hex | { c644247069 c6442471b1 c644247217 c644247363 c6442474bd } | |
| $sequence_7 | hex | { 52 e8???????? 8b442420 8b4c2428 57 56 50 } | |
| $sequence_8 | hex | { 8905???????? b001 e9???????? 488d8c2498020000 e8???????? 48c784245802000000000000 } | |
| $sequence_9 | hex | { 8d55dc 52 681f000200 50 57 56 } | |
| $sequence_10 | hex | { 8d8c2420030000 51 50 ff15???????? 85c0 } | |
| $sequence_11 | hex | { ff15???????? 8d9424a4020000 52 ff15???????? 80bc04a30200005c } | |
| $sequence_12 | hex | { ff15???????? 85c0 89442410 0f848d000000 8b8c2418020000 } | |
| $sequence_13 | hex | { 837c242400 0f8caa040000 8b842440010000 ffc8 8bc0 } | |
| $sequence_14 | hex | { c684248000000025 c684248100000026 c684248200000027 c684248300000028 c684248400000029 c68424850000002a } | |
| $sequence_15 | hex | { ff15???????? 89842490050000 ff15???????? 8b8c2490050000 0fafc8 } |
Condition
7 of them and filesize < 196608In plain words (Heuristic)
- The file must be smaller than 196608 (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: e3629ab6-6c44-5699-b846-61a8ef3e4e0a
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
Related rules
- MalwareMalpedia signator rules· Felix Bilstein - yara-signator at cocacoding dot com· 2026-05-04
- MalwareMalpedia signator rules· Felix Bilstein - yara-signator at cocacoding dot com· 2026-05-04
- MalwareMalpedia signator rules· Felix Bilstein - yara-signator at cocacoding dot com· 2026-05-04
- MalwareMalpedia signator rules· Felix Bilstein - yara-signator at cocacoding dot com· 2026-05-04
- MalwareMalpedia signator rules· Felix Bilstein - yara-signator at cocacoding dot com· 2026-05-04
- MalwareMalpedia signator rules· Felix Bilstein - yara-signator at cocacoding dot com· 2026-05-04
- MalwareMalpedia signator rules· Felix Bilstein - yara-signator at cocacoding dot com· 2026-05-04
- MalwareMalpedia signator rules· Felix Bilstein - yara-signator at cocacoding dot com· 2026-05-04