Sigma rule: PUA- IOX Tunneling Tool Execution

A detection rule from the SigmaHQ repository, shown as its author published it. Dataset version ref-be01f3cc75d6, updated 2024-11-23T00:00:00.000Z.

Rule

Title
PUA- IOX Tunneling Tool Execution
Status
test
Level
high
Author
Florian Roth (Nextron Systems)
Date
2022-10-08
Modified
2024-11-23
File
rules/windows/process_creation/proc_creation_win_pua_iox.yml
Commit
ccbb0369507f796db0b0ae6854c8a2be471b9d84

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

Log source

product
windows
category
process_creation

Detection

selection:
    Image|endswith: '\iox.exe'
selection_commandline:
    CommandLine|contains:
        - '.exe fwd -l '
        - '.exe fwd -r '
        - '.exe proxy -l '
        - '.exe proxy -r '
selection_hashes:
    # v0.4
    Hashes|contains:
        - "MD5=9DB2D314DD3F704A02051EF5EA210993"
        - "SHA1=039130337E28A6623ECF9A0A3DA7D92C5964D8DD"
        - "SHA256=C6CF82919B809967D9D90EA73772A8AA1C1EB3BC59252D977500F64F1A0D6731"
condition: 1 of selection*

False positives (as the rule lists them)

  • Legitimate use

Tags

  • attack.command-and-control
  • attack.t1090

MITRE ATT&CK ids this rule names

References

Read on 2026-11-03T00:58:21.399Z under licence sigma-drl-1.1@d5f4c36a from https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/windows/process_creation/proc_creation_win_pua_iox.yml

Sources and licences

  • SigmaHQ

    "PUA- IOX Tunneling Tool Execution" by Florian Roth (Nextron Systems) (SigmaHQ). Rule: https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/windows/process_creation/proc_creation_win_pua_iox.yml.
    Licensed under the Detection Rule License (DRL) 1.1: https://github.com/SigmaHQ/Detection-Rule-License

    Detection Rule License (DRL) 1.1

Cite this page

Dragons Eye Ransomware Tracker, "Sigma rule: PUA- IOX Tunneling Tool Execution",
entity page, dataset version ref-be01f3cc75d6, updated 2024-11-23T00:00:00.000Z,
https://ransomware-tracker.com/detections/sigma/d7654f02-e04b-4934-9838-65c46f187ebc (accessed 2026-11-03).
Underlying source: SigmaHQ rule d7654f02-e04b-4934-9838-65c46f187ebc, commit ccbb0369507f796db0b0ae6854c8a2be471b9d84.

Pages change. The dataset version identifies the data, but no archive of old versions is kept, so this citation cannot be replayed later.