YARA · Malpedia signator rules
MALPEDIA_Win_Lowball_Auto
autogenerated rule brought to you by yara-signator
MalwareLowballMalpedia 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: Lowball.
It defines 10 patterns (0 text, 10 hex, 0 regex).
Summary generated from the rule's metadata and condition.
Rule source
win-lowball-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Lowball_Auto : FILE
{
meta:
= "autogenerated rule brought to you by yara-signator"
= "Felix Bilstein - yara-signator at cocacoding dot com"
= "97a18ac2-485c-507c-8ccf-e6257898d15d"
= "2026-05-04"
= "2026-05-18"
= "https://malpedia.caad.fkie.fraunhofer.de/details/win.lowball"
= "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.lowball_auto.yar#L1-L118"
= "N/A"
= "f0cfaf3c86d2a26a3fc0cf781b4702870c4026afd625423d383fbc1a5ca3d73e"
= 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 = { 8bfa 8d94244c0d0000 c1e902 f3a5 8bc8 }
$sequence_1 = { 81ec14020000 a0???????? 55 56 57 88442420 b97f000000 }
$sequence_2 = { 0f848c000000 8b942420020000 55 6a00 }
$sequence_3 = { f3ab aa 83c9ff bf???????? }
$sequence_4 = { 57 ff15???????? 8be8 85ed 7459 }
$sequence_5 = { 85f6 7e13 8a4c2410 53 8a1c10 32d9 881c10 }
$sequence_6 = { 85f6 89742410 0f84bf000000 8b8c241c020000 }
$sequence_7 = { ff15???????? 83c408 be???????? 8bc5 8a10 8a1e }
$sequence_8 = { 8b942428060000 55 6a00 6800058084 6a00 6a00 68???????? }
$sequence_9 = { f7d1 49 8be9 8b842434020000 68???????? }
condition:
7 of them and filesize < 40960
}
Strings (10 patterns)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $sequence_0 | hex | { 8bfa 8d94244c0d0000 c1e902 f3a5 8bc8 } | |
| $sequence_1 | hex | { 81ec14020000 a0???????? 55 56 57 88442420 b97f000000 } | |
| $sequence_2 | hex | { 0f848c000000 8b942420020000 55 6a00 } | |
| $sequence_3 | hex | { f3ab aa 83c9ff bf???????? } | |
| $sequence_4 | hex | { 57 ff15???????? 8be8 85ed 7459 } | |
| $sequence_5 | hex | { 85f6 7e13 8a4c2410 53 8a1c10 32d9 881c10 } | |
| $sequence_6 | hex | { 85f6 89742410 0f84bf000000 8b8c241c020000 } | |
| $sequence_7 | hex | { ff15???????? 83c408 be???????? 8bc5 8a10 8a1e } | |
| $sequence_8 | hex | { 8b942428060000 55 6a00 6800058084 6a00 6a00 68???????? } | |
| $sequence_9 | hex | { f7d1 49 8be9 8b842434020000 68???????? } |
Condition
7 of them and filesize < 40960In plain words (Heuristic)
- The file must be smaller than 40960 (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: 97a18ac2-485c-507c-8ccf-e6257898d15d
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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