YARA · Malpedia signator rules
MALPEDIA_Win_Ksl0T_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: Ksl0T.
It defines 16 patterns (0 text, 16 hex, 0 regex).
Summary generated from the rule's metadata and condition.
Rule source
win-ksl0t-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Ksl0T_Auto : FILE
{
meta:
= "autogenerated rule brought to you by yara-signator"
= "Felix Bilstein - yara-signator at cocacoding dot com"
= "2870abe6-5db4-5e5a-a968-46d1ac11caff"
= "2026-05-04"
= "2026-05-18"
= "https://malpedia.caad.fkie.fraunhofer.de/details/win.ksl0t"
= "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.ksl0t_auto.yar#L1-L173"
= "N/A"
= "e36653d3134f0d8f3891988f3daa92e765abf5eacde9d9ce4affe6397f1c8183"
= 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 = { 52 53 894648 ffd7 89464c 8d842468020000 50 }
$sequence_1 = { 85c0 7531 4c8d056c3d0000 488d0da6a70000 bafb020000 e8???????? 85c0 }
$sequence_2 = { ffd7 89465c 8d442438 50 53 }
$sequence_3 = { 888424d3020000 c68424d402000026 c68424d502000026 c68424d60200001c c68424d702000031 }
$sequence_4 = { 4881c22c010000 41b804000000 488d0d05e40000 ff15???????? e9???????? 488d1533c10000 }
$sequence_5 = { 488d8c2400030000 e8???????? ba18000000 488d8c24a0000000 e8???????? ba0d000000 488d8c2480030000 }
$sequence_6 = { 4883c202 488d8c24b0020000 ff15???????? 488b8c2400090000 ff15???????? }
$sequence_7 = { 8138a3000000 744c 488b442450 8138a2000000 743f 4881bc242816000000010000 }
$sequence_8 = { c684248900000039 c684248a00000039 888c248b000000 c644244438 c644244526 }
$sequence_9 = { c684246d01000027 889c246e010000 c684246f01000020 c684247001000034 c684247101000039 }
$sequence_10 = { 03c0 50 8d85000c0000 50 68???????? }
$sequence_11 = { 53 ff15???????? 85c0 0f85b6000000 6a1c 68???????? 57 }
$sequence_12 = { 68???????? e8???????? 83c40c 8b9510150000 }
$sequence_13 = { c684249500000036 c68424960000003a c684249700000031 c684249800000030 c684249900000010 }
$sequence_14 = { 488dbc2492040000 33c0 b9fe030000 f3aa 33c0 }
$sequence_15 = { 4c89442418 4889542410 48894c2408 4881ec08040000 488b05???????? 4833c4 48898424f0030000 }
condition:
7 of them and filesize < 196608
}
Strings (16 patterns)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $sequence_0 | hex | { 52 53 894648 ffd7 89464c 8d842468020000 50 } | |
| $sequence_1 | hex | { 85c0 7531 4c8d056c3d0000 488d0da6a70000 bafb020000 e8???????? 85c0 } | |
| $sequence_2 | hex | { ffd7 89465c 8d442438 50 53 } | |
| $sequence_3 | hex | { 888424d3020000 c68424d402000026 c68424d502000026 c68424d60200001c c68424d702000031 } | |
| $sequence_4 | hex | { 4881c22c010000 41b804000000 488d0d05e40000 ff15???????? e9???????? 488d1533c10000 } | |
| $sequence_5 | hex | { 488d8c2400030000 e8???????? ba18000000 488d8c24a0000000 e8???????? ba0d000000 488d8c2480030000 } | |
| $sequence_6 | hex | { 4883c202 488d8c24b0020000 ff15???????? 488b8c2400090000 ff15???????? } | |
| $sequence_7 | hex | { 8138a3000000 744c 488b442450 8138a2000000 743f 4881bc242816000000010000 } | |
| $sequence_8 | hex | { c684248900000039 c684248a00000039 888c248b000000 c644244438 c644244526 } | |
| $sequence_9 | hex | { c684246d01000027 889c246e010000 c684246f01000020 c684247001000034 c684247101000039 } | |
| $sequence_10 | hex | { 03c0 50 8d85000c0000 50 68???????? } | |
| $sequence_11 | hex | { 53 ff15???????? 85c0 0f85b6000000 6a1c 68???????? 57 } | |
| $sequence_12 | hex | { 68???????? e8???????? 83c40c 8b9510150000 } | |
| $sequence_13 | hex | { c684249500000036 c68424960000003a c684249700000031 c684249800000030 c684249900000010 } | |
| $sequence_14 | hex | { 488dbc2492040000 33c0 b9fe030000 f3aa 33c0 } | |
| $sequence_15 | hex | { 4c89442418 4889542410 48894c2408 4881ec08040000 488b05???????? 4833c4 48898424f0030000 } |
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
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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: 2870abe6-5db4-5e5a-a968-46d1ac11caff
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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