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SEKOIA_Hacktool_Socat_Strings

Detects socat

Hack toolSEKOIA.IO CommunityDetection Rule License 1.1Compiles with YARA-X
Author
Sekoia.io
Date
2023-12-08
Modified
2024-12-19
Score / Quality
75 / 80

What this rule detects

Detects socat

Targets: Windows PE, Linux ELF.

It defines 3 patterns (3 text, 0 hex, 0 regex).

Summary generated from the rule's metadata and condition.

Rule source

Download .yar
hacktool-socat-strings.yarDetection Rule License 1.1
rule SEKOIA_Hacktool_Socat_Strings : FILE
{
	meta:
		description = "Detects socat"
		author = "Sekoia.io"
		id = "7c7e4085-39b2-445e-a9ff-52f21936e714"
		date = "2023-12-08"
		modified = "2024-12-19"
		reference = "https://github.com/SEKOIA-IO/Community"
		source_url = "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/yara_rules/hacktool_socat_strings.yar#L1-L18"
		license_url = "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/LICENSE.md"
		logic_hash = "8f0c907fa2de4141c55073ea5b4a8174f50c716fc7a60d3e838115859a938084"
		score = 75
		quality = 80
		tags = "FILE"
		version = "1.0"
		classification = "TLP:CLEAR"

	strings:
		$ = "[options] <bi-address> <bi-address>"
		$ = "version %s on %s"
		$ = "socat_signal():"

	condition:
		( uint32be( 0 ) == 0x7f454c46 or uint16be( 0 ) == 0x4d5a ) and filesize < 5MB and all of them
}

Strings (3 patterns)

IdentifierTypeValueModifiers
$text"[options] <bi-address> <bi-address>"
$text"version %s on %s"
$text"socat_signal():"

Condition

( uint32be( 0 ) == 0x7f454c46 or uint16be( 0 ) == 0x4d5a ) and filesize < 5MB and all of them

In plain words (Heuristic)

  • The file must start with “MZ” — a Windows executable (PE).
  • The file must start with the ELF header — a Linux/Unix executable.
  • The file must be smaller than 5MB (a cheap guard that skips large files).
  • All patterns in the rule must match.

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References

Licence & attribution

Author: Sekoia.io

Source repository: SEKOIA.IO Community @ a438a5901a

Licence: Detection Rule License 1.1 (repository licence)

Original rule

Mirrored via YARA Forge 20260927, which prefixes rule names with the source and adds normalised meta fields.

Rule id: 7c7e4085-39b2-445e-a9ff-52f21936e714

Metadata

version1.0
classificationTLP:CLEAR

Tags:FILE

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