YARA · Malpedia signator rules
MALPEDIA_Win_Karius_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 / 73
What this rule detects
autogenerated rule brought to you by yara-signator
Associated malware family: Karius.
It defines 26 patterns (0 text, 26 hex, 0 regex).
Summary generated from the rule's metadata and condition.
Rule source
win-karius-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Karius_Auto : FILE
{
meta:
= "autogenerated rule brought to you by yara-signator"
= "Felix Bilstein - yara-signator at cocacoding dot com"
= "3cb1d9ad-d5c4-549f-a1ce-94ef7a14a515"
= "2026-05-04"
= "2026-05-18"
= "https://malpedia.caad.fkie.fraunhofer.de/details/win.karius"
= "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.karius_auto.yar#L1-L245"
= "N/A"
= "42a51763e275d73b90477c335b593ab917c6a5ba4d2c7362206c1d4f1e01c051"
= 75
= 73
= "FILE"
= "1"
= "yara-signator v0.6.0"
= "callsandjumps;datarefs;binvalue"
= "20260422"
= "a182e35da64e6d71cb55f125c4d4225196523f14"
= "20260504"
= "CC BY-SA 4.0"
= "TLP:WHITE"
strings:
$sequence_0 = { 488b05???????? 4885c0 7512 ff15???????? }
$sequence_1 = { 0f8477000000 8bb424b0000000 418b10 8bcd 4903d6 }
$sequence_2 = { 418b5b18 85db 0f849d000000 41837b1400 0f8492000000 458b4320 }
$sequence_3 = { 0f8492000000 458b4320 458b5324 33ed }
$sequence_4 = { 41b830000000 488bcf ff15???????? 4885c0 }
$sequence_5 = { 33ed 4d03c6 4d03d6 448bcd 85db 0f8477000000 8bb424b0000000 }
$sequence_6 = { 0f84b3000000 458b9f88000000 4d03de 418b5b18 85db 0f849d000000 }
$sequence_7 = { c3 85c0 7505 e8???????? b801000000 }
$sequence_8 = { 8bd7 498bce ffd3 4183bf8c00000000 0f84b3000000 458b9f88000000 4d03de }
$sequence_9 = { ff15???????? 488bf8 4885c0 7505 8d4701 }
$sequence_10 = { 7407 3c20 7703 46 75f3 803e5d }
$sequence_11 = { 3a06 7522 42 46 }
$sequence_12 = { 448bc0 33d2 488bce ff15???????? 4c8bf0 4885c0 }
$sequence_13 = { 4d8bcf 33d2 41b800001000 488bce ff15???????? 488bd8 }
$sequence_14 = { 488bc8 ff15???????? 4c8be8 498bce }
$sequence_15 = { 488d4b10 488d542450 41b804000000 c6430f68 }
$sequence_16 = { 42 46 83fa05 7cf2 33c0 }
$sequence_17 = { 56 57 e8???????? 8bc8 83c40c 85c9 0f8485000000 }
$sequence_18 = { 8d7b01 448bfb 448be3 4885c9 }
$sequence_19 = { 7405 f60001 7502 33c0 }
$sequence_20 = { f7d8 8945fc 8955f4 85db 7407 3bd3 }
$sequence_21 = { 42 ff45f8 894d08 e9???????? 8b45f8 5f }
$sequence_22 = { 4d8bcc 4d8bc7 488bd0 488bce ff15???????? 85c0 }
$sequence_23 = { 0f93c0 eb06 803900 0f94c0 }
$sequence_24 = { 4c8be8 498bce ff15???????? 4d85ed }
$sequence_25 = { e9???????? 8b4510 5e 8908 }
condition:
7 of them and filesize < 434176
}
Strings (26 patterns)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $sequence_0 | hex | { 488b05???????? 4885c0 7512 ff15???????? } | |
| $sequence_1 | hex | { 0f8477000000 8bb424b0000000 418b10 8bcd 4903d6 } | |
| $sequence_2 | hex | { 418b5b18 85db 0f849d000000 41837b1400 0f8492000000 458b4320 } | |
| $sequence_3 | hex | { 0f8492000000 458b4320 458b5324 33ed } | |
| $sequence_4 | hex | { 41b830000000 488bcf ff15???????? 4885c0 } | |
| $sequence_5 | hex | { 33ed 4d03c6 4d03d6 448bcd 85db 0f8477000000 8bb424b0000000 } | |
| $sequence_6 | hex | { 0f84b3000000 458b9f88000000 4d03de 418b5b18 85db 0f849d000000 } | |
| $sequence_7 | hex | { c3 85c0 7505 e8???????? b801000000 } | |
| $sequence_8 | hex | { 8bd7 498bce ffd3 4183bf8c00000000 0f84b3000000 458b9f88000000 4d03de } | |
| $sequence_9 | hex | { ff15???????? 488bf8 4885c0 7505 8d4701 } | |
| $sequence_10 | hex | { 7407 3c20 7703 46 75f3 803e5d } | |
| $sequence_11 | hex | { 3a06 7522 42 46 } | |
| $sequence_12 | hex | { 448bc0 33d2 488bce ff15???????? 4c8bf0 4885c0 } | |
| $sequence_13 | hex | { 4d8bcf 33d2 41b800001000 488bce ff15???????? 488bd8 } | |
| $sequence_14 | hex | { 488bc8 ff15???????? 4c8be8 498bce } | |
| $sequence_15 | hex | { 488d4b10 488d542450 41b804000000 c6430f68 } | |
| $sequence_16 | hex | { 42 46 83fa05 7cf2 33c0 } | |
| $sequence_17 | hex | { 56 57 e8???????? 8bc8 83c40c 85c9 0f8485000000 } | |
| $sequence_18 | hex | { 8d7b01 448bfb 448be3 4885c9 } | |
| $sequence_19 | hex | { 7405 f60001 7502 33c0 } | |
| $sequence_20 | hex | { f7d8 8945fc 8955f4 85db 7407 3bd3 } | |
| $sequence_21 | hex | { 42 ff45f8 894d08 e9???????? 8b45f8 5f } | |
| $sequence_22 | hex | { 4d8bcc 4d8bc7 488bd0 488bce ff15???????? 85c0 } | |
| $sequence_23 | hex | { 0f93c0 eb06 803900 0f94c0 } | |
| $sequence_24 | hex | { 4c8be8 498bce ff15???????? 4d85ed } | |
| $sequence_25 | hex | { e9???????? 8b4510 5e 8908 } |
Condition
7 of them and filesize < 434176In plain words (Heuristic)
- The file must be smaller than 434176 (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: 3cb1d9ad-d5c4-549f-a1ce-94ef7a14a515
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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