YARA · SEKOIA.IO Community
SEKOIA_Loader_Win_Jinxloader_Strings
Finds JinxLoader samples based on the specific strings
- Author
- Sekoia.io
- Date
- 2023-12-04
- Modified
- 2024-12-19
- Score / Quality
- 75 / 80
What this rule detects
Finds JinxLoader samples based on the specific strings
Associated malware family: Jinxloader.
Targets: Windows PE.
It defines 4 patterns (4 text, 0 hex, 0 regex).
Summary generated from the rule's metadata and condition.
Rule source
loader-win-jinxloader-strings.yarDetection Rule License 1.1
rule SEKOIA_Loader_Win_Jinxloader_Strings : FILE
{
meta:
= "Finds JinxLoader samples based on the specific strings"
= "Sekoia.io"
= "fd2f7e8c-f4a8-4452-bbc6-e03790f8ed89"
= "2023-12-04"
= "2024-12-19"
= "https://github.com/SEKOIA-IO/Community"
= "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/yara_rules/loader_win_jinxloader_strings.yar#L1-L20"
= "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/LICENSE.md"
= "816cb6019cba1aa2e229ab476fcdf378348981920cbe17d3dfb875f8b2dcbf81"
= 75
= 80
= "FILE"
= "1.0"
= "TLP:CLEAR"
strings:
$str01 = "JinxV2" ascii
$str02 = "main.main.func1" ascii
$str03 = "go.shape.struct" ascii
$str04 = ".glob..func" ascii
condition:
uint16( 0 ) == 0x5A4D and all of them and #str04 > 100 and filesize > 8MB
}
Strings (4 patterns)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $str01 | text | "JinxV2" | ascii |
| $str02 | text | "main.main.func1" | ascii |
| $str03 | text | "go.shape.struct" | ascii |
| $str04 | text | ".glob..func" | ascii |
Condition
uint16( 0 ) == 0x5A4D and all of them and #str04 > 100 and filesize > 8MBIn plain words (Heuristic)
- The file must start with “MZ” — a Windows executable (PE).
- The file must be larger than 8MB.
- All patterns in the rule must match.
- Pattern $str04 must occur > 100 times.
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.
References
Licence & attribution
Author: Sekoia.io
Source repository: SEKOIA.IO Community @ a438a5901a
Licence: Detection Rule License 1.1 (repository licence)
Mirrored via YARA Forge 20260927, which prefixes rule names with the source and adds normalised meta fields.
Rule id: fd2f7e8c-f4a8-4452-bbc6-e03790f8ed89
Metadata
| version | 1.0 |
|---|---|
| classification | TLP:CLEAR |
Tags:FILE
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