YARA · Malpedia signator rules
MALPEDIA_Win_Keyboy_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: Keyboy.
It defines 22 patterns (0 text, 22 hex, 0 regex).
Summary generated from the rule's metadata and condition.
Rule source
win-keyboy-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Keyboy_Auto : FILE
{
meta:
= "autogenerated rule brought to you by yara-signator"
= "Felix Bilstein - yara-signator at cocacoding dot com"
= "5e160c48-e34a-5517-92e8-230d3035758a"
= "2026-05-04"
= "2026-05-18"
= "https://malpedia.caad.fkie.fraunhofer.de/details/win.keyboy"
= "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.keyboy_auto.yar#L1-L209"
= "N/A"
= "c15a0dcb88ac9b4f1072ba3c5286b611b6bc324bd869ec34304793a506654e59"
= 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 = { 6a00 8945f2 8d45f8 50 6a0e 8d45e8 }
$sequence_1 = { 51 ff75d8 6a00 ff75c0 }
$sequence_2 = { c705????????3abf261f c705????????890e9944 c705????????dbd99823 c705????????d468bcb5 c705????????2086e659 }
$sequence_3 = { 5d c3 3b0d???????? f27502 f2c3 f2e953030000 55 }
$sequence_4 = { c705????????d468bcb5 c705????????2086e659 c705????????eec45abf c705????????bbee2bd1 }
$sequence_5 = { c705????????0caa6c89 c705????????a856701f c705????????597e743c c705????????0a9769e0 c705????????c4b85363 c705????????3abf261f }
$sequence_6 = { c745ec5c417070 c745f06c655c55 8bf2 c745f470646174 66c745f86500 }
$sequence_7 = { 8a043e 0fbe4c8de0 3401 0fbec0 0fafc8 }
$sequence_8 = { 24a0 3ca0 7518 b800080000 }
$sequence_9 = { 6683f806 7404 32c9 eb02 }
$sequence_10 = { 56 6a00 ff33 ff15???????? 8945f8 85c0 }
$sequence_11 = { 7207 b901000000 eb0f 3cfe 7509 }
$sequence_12 = { e8???????? 85c0 755e 83ff20 }
$sequence_13 = { 880c3e 46 3bf2 7cd6 5f 5e }
$sequence_14 = { ffd0 e9???????? bbfeffffff eb05 }
$sequence_15 = { c745e06c333200 50 ff15???????? 8bf8 }
$sequence_16 = { f7d9 85db 0f44c2 23c8 }
$sequence_17 = { 8d46d6 99 83e23f 03c2 }
$sequence_18 = { c7852cfdffff07000100 50 ff7304 ff15???????? 85c0 }
$sequence_19 = { 7e2a 8bce 81e107000080 7905 49 }
$sequence_20 = { 2408 f6d8 1ac0 24dd 88474e }
$sequence_21 = { 53 56 57 68cc020000 8d852cfdffff 8bf2 6a00 }
condition:
7 of them and filesize < 2170880
}
Strings (22 patterns)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $sequence_0 | hex | { 6a00 8945f2 8d45f8 50 6a0e 8d45e8 } | |
| $sequence_1 | hex | { 51 ff75d8 6a00 ff75c0 } | |
| $sequence_2 | hex | { c705????????3abf261f c705????????890e9944 c705????????dbd99823 c705????????d468bcb5 c705????????2086e659 } | |
| $sequence_3 | hex | { 5d c3 3b0d???????? f27502 f2c3 f2e953030000 55 } | |
| $sequence_4 | hex | { c705????????d468bcb5 c705????????2086e659 c705????????eec45abf c705????????bbee2bd1 } | |
| $sequence_5 | hex | { c705????????0caa6c89 c705????????a856701f c705????????597e743c c705????????0a9769e0 c705????????c4b85363 c705????????3abf261f } | |
| $sequence_6 | hex | { c745ec5c417070 c745f06c655c55 8bf2 c745f470646174 66c745f86500 } | |
| $sequence_7 | hex | { 8a043e 0fbe4c8de0 3401 0fbec0 0fafc8 } | |
| $sequence_8 | hex | { 24a0 3ca0 7518 b800080000 } | |
| $sequence_9 | hex | { 6683f806 7404 32c9 eb02 } | |
| $sequence_10 | hex | { 56 6a00 ff33 ff15???????? 8945f8 85c0 } | |
| $sequence_11 | hex | { 7207 b901000000 eb0f 3cfe 7509 } | |
| $sequence_12 | hex | { e8???????? 85c0 755e 83ff20 } | |
| $sequence_13 | hex | { 880c3e 46 3bf2 7cd6 5f 5e } | |
| $sequence_14 | hex | { ffd0 e9???????? bbfeffffff eb05 } | |
| $sequence_15 | hex | { c745e06c333200 50 ff15???????? 8bf8 } | |
| $sequence_16 | hex | { f7d9 85db 0f44c2 23c8 } | |
| $sequence_17 | hex | { 8d46d6 99 83e23f 03c2 } | |
| $sequence_18 | hex | { c7852cfdffff07000100 50 ff7304 ff15???????? 85c0 } | |
| $sequence_19 | hex | { 7e2a 8bce 81e107000080 7905 49 } | |
| $sequence_20 | hex | { 2408 f6d8 1ac0 24dd 88474e } | |
| $sequence_21 | hex | { 53 56 57 68cc020000 8d852cfdffff 8bf2 6a00 } |
Condition
7 of them and filesize < 2170880In plain words (Heuristic)
- The file must be smaller than 2170880 (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: 5e160c48-e34a-5517-92e8-230d3035758a
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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