PUA- IOX Tunneling Tool Execution

Severity: high
Author: Florian Roth (Nextron Systems)
Source: upstream

Detects the use of IOX - a tool for port forwarding and intranet proxy purposes

MITRE ATT&CK coverage

Tactic	Techniques
Command & Control	`T1090` Proxy

Event coverage

Provider	Event ID	Title
Sysmon	1	Process creation

Stages and Predicates

Stage 1: `1 of selection`

Image|endswith: '\iox.exe'

Stage 2: `1 of selection_commandline`

or:
CommandLine|contains: '.exe fwd -l '
CommandLine|contains: '.exe fwd -r '
CommandLine|contains: '.exe proxy -l '
CommandLine|contains: '.exe proxy -r '

Stage 3: `1 of selection_hashes`

or:
Hashes|contains: 'MD5=9DB2D314DD3F704A02051EF5EA210993'
Hashes|contains: 'SHA1=039130337E28A6623ECF9A0A3DA7D92C5964D8DD'
Hashes|contains: 'SHA256=C6CF82919B809967D9D90EA73772A8AA1C1EB3BC59252D977500F64F1A0D6731'

Indicators

Each row is a field, operator, and value that the rule matches. The corpus column counts how many other rules in the catalog look for the same combination: high numbers point to widely-used, community-vetted indicators. Blank or 1 shows that the indicator is specific to this rule.

Field	Kind	Values
`CommandLine`	match	`.exe fwd -l` `.exe fwd -r` `.exe proxy -l` `.exe proxy -r`
`Hashes`	match	`MD5=9DB2D314DD3F704A02051EF5EA210993` `SHA1=039130337E28A6623ECF9A0A3DA7D92C5964D8DD` `SHA256=C6CF82919B809967D9D90EA73772A8AA1C1EB3BC59252D977500F64F1A0D6731`
`Image`	ends_with	`\iox.exe`