Sigma rule: Suspicious User-Agents Related To Recon Tools

Rule

Title

Suspicious User-Agents Related To Recon Tools

Status

test

Level

medium

Author

Nasreddine Bencherchali (Nextron Systems), Tim Shelton

Date

2022-07-19

Modified

2026-06-11

File

rules/web/webserver_generic/web_susp_useragents.yml

Commit

ccbb0369507f796db0b0ae6854c8a2be471b9d84

Detects known suspicious (default) user-agents related to scanning/recon tools

Log source

category

webserver

Detection

selection:
    cs-user-agent|contains:
        # Add more tools as you see fit
        - 'commix/'
        - 'feroxbuster/'
        - 'Fuzz Faster U Fool'
        - 'GIS - AppSec Team - Project Vision'
        - 'gobuster/'
        - 'Nikto/'
        - 'Nmap Scripting Engine'
        - 'Recon-ng/v'
        - 'sqlmap/'
        - 'WhatWeb/'
        - 'Wfuzz/'
        - 'WPScan v'
        - 'zgrab/'
condition: selection

False positives (as the rule lists them)

• Unknown

Tags

• attack.initial-access
• attack.t1190

MITRE ATT&CK ids this rule names

• T1190

References

• https://github.com/commixproject/commix/blob/c7f1447371524427bb30abe731235acc7386153b/src/utils/settings.py#L281
• https://github.com/epi052/feroxbuster/blob/ffdf871abe0a358a1531ba4135e208d4dbe8fc31/src/config/utils.rs#L100
• https://github.com/ffuf/ffuf/blob/ce3cf6bd733a24d3a9f024305234c1a6298198eb/pkg/runner/simple.go#L130
• https://github.com/lanmaster53/recon-ng/blob/9e907dfe09fce2997f0301d746796408e01a60b7/recon/core/base.py#L92
• https://github.com/nmap/nmap/blob/2e47fa87469fd358ef64689d2d2de7294e385eb8/nselib/http.lua#L160
• https://github.com/OJ/gobuster/blob/d20300cc46096984565e82fb73a45bf8d281b990/libgobuster/helpers.go#L124
• https://github.com/sqlmapproject/sqlmap/blob/be216041e2f255ae43b050d466bd5bf92681e665/lib/core/settings.py#L29
• https://github.com/sullo/nikto/blob/999670cb6a939b6c93840ce666941756e4c5dcf5/program/plugins/nikto_core.plugin#L3515
• https://github.com/urbanadventurer/WhatWeb/blob/d279d93042d034f3fd29d5a893d44ccc0595d3f8/lib/whatweb.rb#L68
• https://github.com/wpscanteam/wpscan/blob/4f1ce142b9768044be3e35bd0cddf1052e35efe8/lib/wpscan/browser.rb#L32
• https://github.com/xmendez/wfuzz/blob/2263cd0932fef333118cd197656f709141bab615/src/wfuzz/facade.py#L43
• https://github.com/zmap/zgrab2/blob/e91fc9860ca6611eb7c6fe7d2fe2be70212a37ba/modules/http/scanner.go#L54

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