YARA · Malpedia signator rules
MALPEDIA_Win_Ncctrojan_Auto
autogenerated rule brought to you by yara-signator
MalwareNcctrojanMalpedia 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: Ncctrojan.
It defines 17 patterns (0 text, 17 hex, 0 regex).
Summary generated from the rule's metadata and condition.
Rule source
win-ncctrojan-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Ncctrojan_Auto : FILE
{
meta:
= "autogenerated rule brought to you by yara-signator"
= "Felix Bilstein - yara-signator at cocacoding dot com"
= "397c1c48-b2d6-5322-ab7d-4abc0e59c73a"
= "2026-05-04"
= "2026-05-18"
= "https://malpedia.caad.fkie.fraunhofer.de/details/win.ncctrojan"
= "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.ncctrojan_auto.yar#L1-L174"
= "N/A"
= "f4906b9455afc57b70a3cddd8bdf9cc62def116e0c480e8106b08790424df03c"
= 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 = { e9???????? 83f801 750a 68???????? e9???????? }
$sequence_1 = { 7536 8b85e8feffff 85c0 750a }
$sequence_2 = { ff15???????? 8945f0 8d45ec 6a10 }
$sequence_3 = { 6a00 50 e8???????? 83c420 56 6a00 }
$sequence_4 = { 6800400000 50 e8???????? 83c40c 837c240c00 }
$sequence_5 = { eb0c 68???????? eb05 68???????? 8d44247c 6800400000 50 }
$sequence_6 = { 745c 8b3d???????? 8d75ac 8b15???????? }
$sequence_7 = { 6a00 ff15???????? 8d85e8fdffff 50 8d85e8adffff 6800400000 }
$sequence_8 = { 0f8552ffffff eb57 6800400000 8d85d496ffff 6a00 50 }
$sequence_9 = { 50 e8???????? 8b4d08 e8???????? e9???????? 8b4d08 e8???????? }
$sequence_10 = { 6a00 50 e8???????? 0fb745b8 50 0fb745b6 }
$sequence_11 = { 8b542408 8d420c 8b8a2cf8ffff 33c8 e8???????? 8b4afc }
$sequence_12 = { 8b542408 8d420c 8b8a0cfefeff 33c8 }
$sequence_13 = { 85d2 7e10 8ac1 02c9 2480 }
$sequence_14 = { 85db 0f84b8000000 6a14 59 }
$sequence_15 = { 0fb745ac 50 8d45bc 68???????? }
$sequence_16 = { 6a00 50 e8???????? 56 8d856cfeffff 68???????? }
condition:
7 of them and filesize < 1160192
}
Strings (17 patterns)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $sequence_0 | hex | { e9???????? 83f801 750a 68???????? e9???????? } | |
| $sequence_1 | hex | { 7536 8b85e8feffff 85c0 750a } | |
| $sequence_2 | hex | { ff15???????? 8945f0 8d45ec 6a10 } | |
| $sequence_3 | hex | { 6a00 50 e8???????? 83c420 56 6a00 } | |
| $sequence_4 | hex | { 6800400000 50 e8???????? 83c40c 837c240c00 } | |
| $sequence_5 | hex | { eb0c 68???????? eb05 68???????? 8d44247c 6800400000 50 } | |
| $sequence_6 | hex | { 745c 8b3d???????? 8d75ac 8b15???????? } | |
| $sequence_7 | hex | { 6a00 ff15???????? 8d85e8fdffff 50 8d85e8adffff 6800400000 } | |
| $sequence_8 | hex | { 0f8552ffffff eb57 6800400000 8d85d496ffff 6a00 50 } | |
| $sequence_9 | hex | { 50 e8???????? 8b4d08 e8???????? e9???????? 8b4d08 e8???????? } | |
| $sequence_10 | hex | { 6a00 50 e8???????? 0fb745b8 50 0fb745b6 } | |
| $sequence_11 | hex | { 8b542408 8d420c 8b8a2cf8ffff 33c8 e8???????? 8b4afc } | |
| $sequence_12 | hex | { 8b542408 8d420c 8b8a0cfefeff 33c8 } | |
| $sequence_13 | hex | { 85d2 7e10 8ac1 02c9 2480 } | |
| $sequence_14 | hex | { 85db 0f84b8000000 6a14 59 } | |
| $sequence_15 | hex | { 0fb745ac 50 8d45bc 68???????? } | |
| $sequence_16 | hex | { 6a00 50 e8???????? 56 8d856cfeffff 68???????? } |
Condition
7 of them and filesize < 1160192In plain words (Heuristic)
- The file must be smaller than 1160192 (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: 397c1c48-b2d6-5322-ab7d-4abc0e59c73a
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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