Emerging Threatcriticaltest
OWASSRF Exploitation Attempt Using Public POC - Proxy
Detects exploitation attempt of the OWASSRF variant targeting exchange servers using publicly available POC. It uses the OWA endpoint to access the powershell backend endpoint
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Launch
Emerging Threat
Active Threat
Developed to detect an active or emerging threat. Prioritize investigation of any alerts and correlate with threat intelligence.
Log Source
Proxy Log
CategoryProxy Log← raw: proxy
Detection Logic
Detection Logic1 selector
detection:
selection:
# Look for the header: X-OWA-ExplicitLogonUser: owa/mastermailbox@outlook.com
c-useragent: 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/105.0.5195.54 Safari/537.36'
cs-method: 'POST'
sc-status: 200
c-uri|contains|all:
- '/owa/mastermailbox'
- '/powershell'
condition: selectionFalse Positives
Unlikely
False positives are unlikely for most environments. High confidence detection.
MITRE ATT&CK
Tactics
Other
detection.emerging-threats
Rule Metadata
Rule ID
fdd7e904-7304-4616-a46a-e32f917c4be4
Status
test
Level
critical
Type
Emerging Threat
Created
Thu Dec 22
Path
rules-emerging-threats/2022/Exploits/CVE-2022-41082/proxy_cve_2022_36804_exchange_owassrf_poc_exploitation.yml
Raw Tags
attack.initial-accessattack.t1190detection.emerging-threats