YARA · Malpedia signator rules
MALPEDIA_Win_Nailao_Locker_Auto
autogenerated rule brought to you by yara-signator
MalwareNailao LockerMalpedia 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: Nailao Locker.
It defines 10 patterns (0 text, 10 hex, 0 regex).
Summary generated from the rule's metadata and condition.
Rule source
win-nailao-locker-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Nailao_Locker_Auto : FILE
{
meta:
= "autogenerated rule brought to you by yara-signator"
= "Felix Bilstein - yara-signator at cocacoding dot com"
= "f4c7e8c8-8aa6-5e33-a918-59530a460f83"
= "2026-05-04"
= "2026-05-18"
= "https://malpedia.caad.fkie.fraunhofer.de/details/win.nailao_locker"
= "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.nailao_locker_auto.yar#L1-L124"
= "N/A"
= "f78b85817e2074b7551f2d50266d0de829d714ef0f0e69cc60951820f6d3314c"
= 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 = { 488b45d8 488908 488d0d99560100 488b45d8 8990a8030000 }
$sequence_1 = { 8a4118 4188440830 4881ff01010000 7ce8 488d05043d0100 482bd8 4a8d0c0a }
$sequence_2 = { 4b8b84eb100e0200 420fb64cf83e 460fbea41910d90100 41ffc4 418bc4 2bc2 8945af }
$sequence_3 = { 488d4c2460 ff15???????? 48894340 4885c0 7508 ff15???????? eb08 }
$sequence_4 = { e8???????? 4889442450 488d9570010000 0f57c0 }
$sequence_5 = { 4889442450 488d0d00760100 0f57c0 488905???????? }
$sequence_6 = { e8???????? 33d2 488d7b0c 0fb7c2 4c8d0d2a3c0100 48895304 4c8bc3 }
$sequence_7 = { 443935???????? eb0d 6683fb03 7509 443935???????? 755b }
$sequence_8 = { ff15???????? 3d04010000 7c0a b8ce000000 e9???????? 48899c2400030000 }
$sequence_9 = { 33d2 488d7b0c 0fb7c2 4c8d0d2a3c0100 48895304 4c8bc3 48899320020000 }
condition:
7 of them and filesize < 512000
}
Strings (10 patterns)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $sequence_0 | hex | { 488b45d8 488908 488d0d99560100 488b45d8 8990a8030000 } | |
| $sequence_1 | hex | { 8a4118 4188440830 4881ff01010000 7ce8 488d05043d0100 482bd8 4a8d0c0a } | |
| $sequence_2 | hex | { 4b8b84eb100e0200 420fb64cf83e 460fbea41910d90100 41ffc4 418bc4 2bc2 8945af } | |
| $sequence_3 | hex | { 488d4c2460 ff15???????? 48894340 4885c0 7508 ff15???????? eb08 } | |
| $sequence_4 | hex | { e8???????? 4889442450 488d9570010000 0f57c0 } | |
| $sequence_5 | hex | { 4889442450 488d0d00760100 0f57c0 488905???????? } | |
| $sequence_6 | hex | { e8???????? 33d2 488d7b0c 0fb7c2 4c8d0d2a3c0100 48895304 4c8bc3 } | |
| $sequence_7 | hex | { 443935???????? eb0d 6683fb03 7509 443935???????? 755b } | |
| $sequence_8 | hex | { ff15???????? 3d04010000 7c0a b8ce000000 e9???????? 48899c2400030000 } | |
| $sequence_9 | hex | { 33d2 488d7b0c 0fb7c2 4c8d0d2a3c0100 48895304 4c8bc3 48899320020000 } |
Condition
7 of them and filesize < 512000In plain words (Heuristic)
- The file must be smaller than 512000 (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: f4c7e8c8-8aa6-5e33-a918-59530a460f83
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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