Sigma rule: PUA - Fast Reverse Proxy (FRP) Execution

A detection rule from the SigmaHQ repository, shown as its author published it. Dataset version ref-6ae9b4b63000, updated 2024-11-23T00:00:00.000Z.

Rule

Title
PUA - Fast Reverse Proxy (FRP) Execution
Status
test
Level
high
Author
frack113, Florian Roth
Date
2022-09-02
Modified
2024-11-23
File
rules/windows/process_creation/proc_creation_win_pua_frp.yml
Commit
ccbb0369507f796db0b0ae6854c8a2be471b9d84

Detects the use of Fast Reverse Proxy. frp is a fast reverse proxy to help you expose a local server behind a NAT or firewall to the Internet.

Log source

product
windows
category
process_creation

Detection

selection_img:
    Image|endswith:
        - '\frpc.exe'
        - '\frps.exe'
selection_cli:
    CommandLine|contains: '\frpc.ini'
selection_hashes:
    # v0.44.0
    Hashes|contains:
        - "MD5=7D9C233B8C9E3F0EA290D2B84593C842"
        - "SHA1=06DDC9280E1F1810677935A2477012960905942F"
        - "SHA256=57B0936B8D336D8E981C169466A15A5FD21A7D5A2C7DAF62D5E142EE860E387C"
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_frp.yml

Sources and licences

  • SigmaHQ

    "PUA - Fast Reverse Proxy (FRP) Execution" by frack113, Florian Roth (SigmaHQ). Rule: https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/windows/process_creation/proc_creation_win_pua_frp.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 - Fast Reverse Proxy (FRP) Execution",
entity page, dataset version ref-6ae9b4b63000, updated 2024-11-23T00:00:00.000Z,
https://ransomware-tracker.com/detections/sigma/32410e29-5f94-4568-b6a3-d91a8adad863 (accessed 2026-11-03).
Underlying source: SigmaHQ rule 32410e29-5f94-4568-b6a3-d91a8adad863, 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.