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SEKOIA_Hacktool_Iox_Tunneling

Detects IOX tunneling tool

Hack toolSEKOIA.IO CommunityDetection Rule License 1.1Compiles with YARA-X
Author
Sekoia.io
Date
2022-10-13
Modified
2024-12-19
Score / Quality
75 / 80

What this rule detects

Detects IOX tunneling tool

Targets: Windows PE, Linux ELF.

It defines 6 patterns (6 text, 0 hex, 0 regex).

Summary generated from the rule's metadata and condition.

Rule source

Download .yar
hacktool-iox-tunneling.yarDetection Rule License 1.1
rule SEKOIA_Hacktool_Iox_Tunneling : FILE
{
	meta:
		description = "Detects IOX tunneling tool"
		author = "Sekoia.io"
		id = "45b31d67-95e9-405d-88ea-3f2006ef160a"
		date = "2022-10-13"
		modified = "2024-12-19"
		reference = "https://github.com/SEKOIA-IO/Community"
		source_url = "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/yara_rules/hacktool_iox_tunneling.yar#L1-L22"
		license_url = "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/LICENSE.md"
		logic_hash = "e15df032864799e282ee89402d22b82e5d4b8f469ec292575a1bcb78d24db012"
		score = 75
		quality = 80
		tags = "FILE"
		version = "1.0"
		classification = "TLP:CLEAR"

	strings:
		$ = "iox/operate.Local2Remote"
		$ = "iox/operate.Local2Local"
		$ = "iox/operate.Remote2Remote"
		$ = "iox/operate.ProxyLocal"
		$ = "iox/operate.ProxyRemote"
		$ = "iox/operate.ProxyRemoteL2L"

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

Strings (6 patterns)

IdentifierTypeValueModifiers
$text"iox/operate.Local2Remote"
$text"iox/operate.Local2Local"
$text"iox/operate.Remote2Remote"
$text"iox/operate.ProxyLocal"
$text"iox/operate.ProxyRemote"
$text"iox/operate.ProxyRemoteL2L"

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: 45b31d67-95e9-405d-88ea-3f2006ef160a

Metadata

version1.0
classificationTLP:CLEAR

Tags:FILE

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