YARA · Malpedia signator rules
MALPEDIA_Win_Nim_Blackout_Auto
autogenerated rule brought to you by yara-signator
MalwareNim BlackoutMalpedia 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: Nim Blackout.
It defines 10 patterns (0 text, 10 hex, 0 regex).
Summary generated from the rule's metadata and condition.
Rule source
win-nim-blackout-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Nim_Blackout_Auto : FILE
{
meta:
= "autogenerated rule brought to you by yara-signator"
= "Felix Bilstein - yara-signator at cocacoding dot com"
= "048267f7-62fb-507b-b119-68debffc7bf9"
= "2026-05-04"
= "2026-05-18"
= "https://malpedia.caad.fkie.fraunhofer.de/details/win.nim_blackout"
= "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.nim_blackout_auto.yar#L1-L130"
= "N/A"
= "06823db7fdc0487e1c01e7b7292944b80bcc51abb9b98ed51feb95984ce49f66"
= 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 = { 4889e5 4881ecf0000000 48894d10 48895518 488d0589840200 48898538ffffff 488d0536820200 }
$sequence_1 = { 782e 488b85a0000000 488b4040 4885c0 }
$sequence_2 = { 488d14c500000000 488b4518 4801d0 488b00 4885c0 742d 48c745d07d000000 }
$sequence_3 = { 488d45c8 488910 4889c8 83e001 84c0 7405 e8???????? }
$sequence_4 = { eb05 b800000000 4801d0 4889c1 e8???????? 48898588000000 488b9580000000 }
$sequence_5 = { e8???????? 488b45b0 488945f8 48c745d025010000 488d0592090100 488945d8 }
$sequence_6 = { 4821c2 488b4510 488910 48c745c0a8000000 488d0591790200 488945c8 488b4510 }
$sequence_7 = { 488b45f0 488945f8 e9???????? 90 48c745c0bb000000 488d0559820100 488945c8 }
$sequence_8 = { 0f8e9e040000 c64424302e 488d442431 c60030 488d5801 458b54240c bd02000000 }
$sequence_9 = { 488945d8 c645f600 48837d1800 7409 488b4518 488b00 eb05 }
condition:
7 of them and filesize < 1068032
}
Strings (10 patterns)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $sequence_0 | hex | { 4889e5 4881ecf0000000 48894d10 48895518 488d0589840200 48898538ffffff 488d0536820200 } | |
| $sequence_1 | hex | { 782e 488b85a0000000 488b4040 4885c0 } | |
| $sequence_2 | hex | { 488d14c500000000 488b4518 4801d0 488b00 4885c0 742d 48c745d07d000000 } | |
| $sequence_3 | hex | { 488d45c8 488910 4889c8 83e001 84c0 7405 e8???????? } | |
| $sequence_4 | hex | { eb05 b800000000 4801d0 4889c1 e8???????? 48898588000000 488b9580000000 } | |
| $sequence_5 | hex | { e8???????? 488b45b0 488945f8 48c745d025010000 488d0592090100 488945d8 } | |
| $sequence_6 | hex | { 4821c2 488b4510 488910 48c745c0a8000000 488d0591790200 488945c8 488b4510 } | |
| $sequence_7 | hex | { 488b45f0 488945f8 e9???????? 90 48c745c0bb000000 488d0559820100 488945c8 } | |
| $sequence_8 | hex | { 0f8e9e040000 c64424302e 488d442431 c60030 488d5801 458b54240c bd02000000 } | |
| $sequence_9 | hex | { 488945d8 c645f600 48837d1800 7409 488b4518 488b00 eb05 } |
Condition
7 of them and filesize < 1068032In plain words (Heuristic)
- The file must be smaller than 1068032 (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: 048267f7-62fb-507b-b119-68debffc7bf9
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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