YARA · SEKOIA.IO Community
SEKOIA_Tool_Generic_Python_Reverse_Shell_Strings
Detects reverse shell
- Author
- Sekoia.io
- Date
- 2024-04-16
- Modified
- 2024-12-19
- Score / Quality
- 75 / 80
What this rule detects
Detects reverse shell
It defines 2 patterns (2 text, 0 hex, 0 regex).
Summary generated from the rule's metadata and condition.
Rule source
tool-generic-python-reverse-shell-strings.yarDetection Rule License 1.1
rule SEKOIA_Tool_Generic_Python_Reverse_Shell_Strings : FILE
{
meta:
= "Detects reverse shell"
= "Sekoia.io"
= "5b926d15-4f21-428c-a9fa-ee085a98d42b"
= "2024-04-16"
= "2024-12-19"
= "https://github.com/SEKOIA-IO/Community"
= "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/yara_rules/tool_generic_python_reverse_shell_strings.yar#L1-L16"
= "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/LICENSE.md"
= "bb4fcef595f4be035815f536786987ac1343727f16c0560a1cb593e854ba8f17"
= 75
= 80
= "FILE"
= "1.0"
= "TLP:CLEAR"
strings:
$ = "import sys,socket,os,pty;"
$ = "[os.dup2(s.fileno(),fd) for fd in (0,1,2)]"
condition:
all of them and filesize < 1000
}
Strings (2 patterns)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $ | text | "import sys,socket,os,pty;" | |
| $ | text | "[os.dup2(s.fileno(),fd) for fd in (0,1,2)]" |
Condition
all of them and filesize < 1000In plain words (Heuristic)
- The file must be smaller than 1000 (a cheap guard that skips large files).
- All patterns in the rule must match.
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: 5b926d15-4f21-428c-a9fa-ee085a98d42b
Metadata
| version | 1.0 |
|---|---|
| classification | TLP:CLEAR |
Tags:FILE
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