YARA · Malpedia signator rules
MALPEDIA_Win_Kiwistealer_Auto
autogenerated rule brought to you by yara-signator
MalwareKiwistealerMalpedia 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: Kiwistealer.
It defines 10 patterns (0 text, 10 hex, 0 regex).
Summary generated from the rule's metadata and condition.
Rule source
win-kiwistealer-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Kiwistealer_Auto : FILE
{
meta:
= "autogenerated rule brought to you by yara-signator"
= "Felix Bilstein - yara-signator at cocacoding dot com"
= "03031c87-ec9e-548f-8440-76f03c3e7c2a"
= "2026-05-04"
= "2026-05-18"
= "https://malpedia.caad.fkie.fraunhofer.de/details/win.kiwistealer"
= "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.kiwistealer_auto.yar#L1-L133"
= "N/A"
= "f883b5c67ed6c65669f99076aeae0c368f0044861db0cb06fafc1de5c8e39db3"
= 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 = { e8???????? 4885c0 751f 488b442460 48634804 488d442460 4803c8 }
$sequence_1 = { 744b 4c8bcb 48837b1808 7203 4c8b0b 488b5310 488b4618 }
$sequence_2 = { 663bd5 7509 410fb7c7 e9???????? 488b4140 488b38 488b4158 }
$sequence_3 = { 488d15ec550100 488d8c2498030000 e8???????? 90 4c8d842498030000 488d942460080000 488d8c2430060000 }
$sequence_4 = { c3 488d0541da0100 41c70074000000 49894008 498bc0 41c6400401 c3 }
$sequence_5 = { 4883f81f 7607 ff15???????? cc e8???????? 660f6f05???????? f30f7f842420020000 }
$sequence_6 = { 660f1f440000 488b4120 48898390000000 4885c0 7507 4889ab98000000 }
$sequence_7 = { 488bcf 4b8d1c3e 488d53c0 e8???????? 488d53e0 488d4f20 e8???????? }
$sequence_8 = { 48f7fb 4869c800ca9a3b 498bc0 4899 48f7fb 4869c200ca9a3b 4899 }
$sequence_9 = { 4803c8 b20a ff15???????? 440fb6c0 488d9424d8060000 488d8c24e0070000 e8???????? }
condition:
7 of them and filesize < 403456
}
Strings (10 patterns)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $sequence_0 | hex | { e8???????? 4885c0 751f 488b442460 48634804 488d442460 4803c8 } | |
| $sequence_1 | hex | { 744b 4c8bcb 48837b1808 7203 4c8b0b 488b5310 488b4618 } | |
| $sequence_2 | hex | { 663bd5 7509 410fb7c7 e9???????? 488b4140 488b38 488b4158 } | |
| $sequence_3 | hex | { 488d15ec550100 488d8c2498030000 e8???????? 90 4c8d842498030000 488d942460080000 488d8c2430060000 } | |
| $sequence_4 | hex | { c3 488d0541da0100 41c70074000000 49894008 498bc0 41c6400401 c3 } | |
| $sequence_5 | hex | { 4883f81f 7607 ff15???????? cc e8???????? 660f6f05???????? f30f7f842420020000 } | |
| $sequence_6 | hex | { 660f1f440000 488b4120 48898390000000 4885c0 7507 4889ab98000000 } | |
| $sequence_7 | hex | { 488bcf 4b8d1c3e 488d53c0 e8???????? 488d53e0 488d4f20 e8???????? } | |
| $sequence_8 | hex | { 48f7fb 4869c800ca9a3b 498bc0 4899 48f7fb 4869c200ca9a3b 4899 } | |
| $sequence_9 | hex | { 4803c8 b20a ff15???????? 440fb6c0 488d9424d8060000 488d8c24e0070000 e8???????? } |
Condition
7 of them and filesize < 403456In plain words (Heuristic)
- The file must be smaller than 403456 (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.
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: 03031c87-ec9e-548f-8440-76f03c3e7c2a
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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