sigmamediumHunting

Successful IIS Shortname Fuzzing Scan

When IIS uses an old .Net Framework it's possible to enumerate folders with the symbol "~"

MITRE ATT&CK

initial-access

Detection Query

selection:
  cs-uri-query|contains: ~1
  cs-uri-query|endswith: a.aspx
  cs-method:
    - GET
    - OPTIONS
  sc-status:
    - 200
    - 301
condition: selection

Author

frack113

Created

2021-10-06

Data Sources

webserver

References

Tags

attack.initial-accessattack.t1190

Raw Content

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