YARA · Malpedia signator rules
MALPEDIA_Win_Nabucur_Auto
autogenerated rule brought to you by yara-signator
MalwareNabucurMalpedia 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: Nabucur.
It defines 16 patterns (0 text, 16 hex, 0 regex).
Summary generated from the rule's metadata and condition.
Rule source
win-nabucur-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Nabucur_Auto : FILE
{
meta:
= "autogenerated rule brought to you by yara-signator"
= "Felix Bilstein - yara-signator at cocacoding dot com"
= "30149a16-f5f4-5678-9c69-fb692298335c"
= "2026-05-04"
= "2026-05-18"
= "https://malpedia.caad.fkie.fraunhofer.de/details/win.nabucur"
= "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.nabucur_auto.yar#L1-L159"
= "N/A"
= "2b7c3d756500fa20c23843b84a9086b4c85fb7c4fe41352a8b5ff7a1dfee359e"
= 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 = { 48 894500 85c0 7fee }
$sequence_1 = { 49 23cf 894c241c 3bc3 }
$sequence_2 = { 33ff 33f6 4a c744244001000000 89542434 8b6c2438 }
$sequence_3 = { 49 23cb 894d08 5d }
$sequence_4 = { 009eaa030000 0fb686aa030000 57 83f80a 0f876d010000 }
$sequence_5 = { 49 03d3 40 85c9 }
$sequence_6 = { 49 23ce 894f18 8bf0 85c0 0f8521040000 }
$sequence_7 = { 49 3b442430 891e 8944241c }
$sequence_8 = { bb95c9c7fe e8???????? 81f2cf3a3100 81f3db2737fd }
$sequence_9 = { e9???????? 837d0c00 750c ffb5a4fdffff 8f05???????? }
$sequence_10 = { baaf746bf8 81f2d2b424fb e8???????? 81f2e5b3d7f7 bbee904bf8 }
$sequence_11 = { 8706 85c0 75f5 61 c3 60 }
$sequence_12 = { 2d4c67d056 0e 67389db266 d07d0b 80ab140ee42859 }
$sequence_13 = { bbb76d15f9 e8???????? bb1ddfc5f7 81f2560b5efd ba3be69bfc }
$sequence_14 = { bafa2649fd 83f901 7db6 ba8fb4a3fb ebb8 83e904 }
$sequence_15 = { a1???????? a6 48 207b98 }
condition:
7 of them and filesize < 1949696
}
Strings (16 patterns)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $sequence_0 | hex | { 48 894500 85c0 7fee } | |
| $sequence_1 | hex | { 49 23cf 894c241c 3bc3 } | |
| $sequence_2 | hex | { 33ff 33f6 4a c744244001000000 89542434 8b6c2438 } | |
| $sequence_3 | hex | { 49 23cb 894d08 5d } | |
| $sequence_4 | hex | { 009eaa030000 0fb686aa030000 57 83f80a 0f876d010000 } | |
| $sequence_5 | hex | { 49 03d3 40 85c9 } | |
| $sequence_6 | hex | { 49 23ce 894f18 8bf0 85c0 0f8521040000 } | |
| $sequence_7 | hex | { 49 3b442430 891e 8944241c } | |
| $sequence_8 | hex | { bb95c9c7fe e8???????? 81f2cf3a3100 81f3db2737fd } | |
| $sequence_9 | hex | { e9???????? 837d0c00 750c ffb5a4fdffff 8f05???????? } | |
| $sequence_10 | hex | { baaf746bf8 81f2d2b424fb e8???????? 81f2e5b3d7f7 bbee904bf8 } | |
| $sequence_11 | hex | { 8706 85c0 75f5 61 c3 60 } | |
| $sequence_12 | hex | { 2d4c67d056 0e 67389db266 d07d0b 80ab140ee42859 } | |
| $sequence_13 | hex | { bbb76d15f9 e8???????? bb1ddfc5f7 81f2560b5efd ba3be69bfc } | |
| $sequence_14 | hex | { bafa2649fd 83f901 7db6 ba8fb4a3fb ebb8 83e904 } | |
| $sequence_15 | hex | { a1???????? a6 48 207b98 } |
Condition
7 of them and filesize < 1949696In plain words (Heuristic)
- The file must be smaller than 1949696 (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: 30149a16-f5f4-5678-9c69-fb692298335c
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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