Sigma rule: Citrix ADS Exploitation CVE-2020-8193 CVE-2020-8195

A detection rule from the SigmaHQ repository, shown as its author published it. Dataset version ref-dd8fed4d661d, updated 2023-01-02T00:00:00.000Z.

Rule

Title
Citrix ADS Exploitation CVE-2020-8193 CVE-2020-8195
Status
test
Level
critical
Author
Florian Roth (Nextron Systems)
Date
2020-07-10
Modified
2023-01-02
File
rules-emerging-threats/2020/Exploits/CVE-2020-8193/web_cve_2020_8193_8195_citrix_exploit.yml
Commit
ccbb0369507f796db0b0ae6854c8a2be471b9d84

Detects exploitation attempt against Citrix Netscaler, Application Delivery Controller (ADS) and Citrix Gateway exploiting vulnerabilities reported as CVE-2020-8193 and CVE-2020-8195

Log source

category
webserver

Detection

selection1:
    cs-uri-query|contains: '/rapi/filedownload?filter=path:%2F'
selection2:
    cs-uri-query|contains|all:
        - '/pcidss/report'
        - 'type=all_signatures'
        - 'sig_name=_default_signature_'
condition: 1 of selection*

False positives (as the rule lists them)

  • Unknown

Tags

  • attack.initial-access
  • attack.t1190
  • cve.2020-8193
  • cve.2020-8195
  • detection.emerging-threats

CVEs this rule names

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-emerging-threats/2020/Exploits/CVE-2020-8193/web_cve_2020_8193_8195_citrix_exploit.yml

Sources and licences

  • SigmaHQ

    "Citrix ADS Exploitation CVE-2020-8193 CVE-2020-8195" by Florian Roth (Nextron Systems) (SigmaHQ). Rule: https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules-emerging-threats/2020/Exploits/CVE-2020-8193/web_cve_2020_8193_8195_citrix_exploit.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: Citrix ADS Exploitation CVE-2020-8193 CVE-2020-8195",
entity page, dataset version ref-dd8fed4d661d, updated 2023-01-02T00:00:00.000Z,
https://ransomware-tracker.com/detections/sigma/0d0d9a8a-a49e-4e27-b061-7ce4b936cfb7 (accessed 2026-11-03).
Underlying source: SigmaHQ rule 0d0d9a8a-a49e-4e27-b061-7ce4b936cfb7, 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.