YARA · ditekSHen detection
DITEKSHEN_MALWARE_Win_Cobianrat
Detects CobianRAT, a fork of Njrat
- Author
- ditekSHen
- Date
- 2020-11-06
- Modified
- 2024-11-01
- Score / Quality
- 75 / 75
What this rule detects
Detects CobianRAT, a fork of Njrat
Associated malware family: Cobianrat.
Targets: Windows PE.
It defines 7 patterns (7 text, 0 hex, 0 regex).
Summary generated from the rule's metadata and condition.
Rule source
malware-win-cobianrat.yarBSD 2-Clause License
rule DITEKSHEN_MALWARE_Win_Cobianrat : FILE
{
meta:
= "Detects CobianRAT, a fork of Njrat"
= "ditekSHen"
= "5a9b6f04-fc52-52a9-b72f-d24dd093e886"
= "2020-11-06"
= "2024-11-01"
= "https://github.com/ditekshen/detection"
= "https://github.com/ditekshen/detection/blob/e76c93dcdedff04076380ffc60ea54e45b313635/yara/malware.yar#L5626-L5640"
= "https://github.com/ditekshen/detection/blob/e76c93dcdedff04076380ffc60ea54e45b313635/LICENSE.txt"
= "5c8f55e5328b61c3591c876797b4521f8e98af7a6c53bab918f10d5c3c2b5013"
= 75
= 75
= "FILE"
strings:
$s1 = "1.0.40.7" fullword wide
$s2 = "DownloadData" fullword wide
$s3 = "Executed As" fullword wide
$s4 = "\\Plugins" fullword wide
$s5 = "LOGIN" fullword wide
$s6 = "software\\microsoft\\windows\\currentversion\\run" wide
$s7 = "Hidden" fullword wide
condition:
uint16( 0 ) == 0x5a4d and 5 of them
}
Strings (7 patterns)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $s1 | text | "1.0.40.7" | fullword wide |
| $s2 | text | "DownloadData" | fullword wide |
| $s3 | text | "Executed As" | fullword wide |
| $s4 | text | "\\Plugins" | fullword wide |
| $s5 | text | "LOGIN" | fullword wide |
| $s6 | text | "software\\microsoft\\windows\\currentversion\\run" | wide |
| $s7 | text | "Hidden" | fullword wide |
Condition
uint16( 0 ) == 0x5a4d and 5 of themIn plain words (Heuristic)
- The file must start with “MZ” — a Windows executable (PE).
- At least 5 patterns in the rule must match.
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References
Licence & attribution
Author: ditekSHen
Source repository: ditekSHen detection @ e76c93dcde
Licence: BSD 2-Clause License (repository licence)
Copyright notice: Copyright 2021 by ditekSHen (https://github.com/ditekshen/detection).
Mirrored via YARA Forge 20260927, which prefixes rule names with the source and adds normalised meta fields.
Rule id: 5a9b6f04-fc52-52a9-b72f-d24dd093e886
Tags:FILE
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