Successful IIS Shortname Fuzzing Scan

calendar Aug 12, 2024 · attack.initial-access attack.t1190  ·
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When IIS uses an old .Net Framework it's possible to enumerate folders with the symbol "~"

Sigma rule (View on GitHub)

 1title: Successful IIS Shortname Fuzzing Scan
 2id: 7cb02516-6d95-4ffc-8eee-162075e111ac
 3status: test
 4description: When IIS uses an old .Net Framework it's possible to enumerate folders with the symbol "~"
 5references:
 6    - https://github.com/projectdiscovery/nuclei-templates/blob/9d2889356eebba661c8407038e430759dfd4ec31/fuzzing/iis-shortname.yaml
 7    - https://www.exploit-db.com/exploits/19525
 8    - https://github.com/lijiejie/IIS_shortname_Scanner
 9author: frack113
10date: 2021-10-06
11modified: 2023-01-02
12tags:
13    - attack.initial-access
14    - attack.t1190
15logsource:
16    category: webserver
17detection:
18    selection:
19        cs-uri-query|contains: '~1'
20        cs-uri-query|endswith: 'a.aspx'
21        cs-method:
22            - GET
23            - OPTIONS
24        # Success only
25        sc-status:
26            - 200
27            - 301
28    condition: selection
29falsepositives:
30    - Unknown
31level: medium

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