Rule History

SID: 2033836 • Source: et/open

Versions (4)

Version DetailsCurrent

Rev: 1 • Aug 30, 2021, 12:00 PM

Message:

ET EXPLOIT Microsoft Exchange - InboxRules.svc Access Observed Following Successful ProxyToken Attack

Rule:

alert http any any -> [$HOME_NET,$HTTP_SERVERS] any (msg:"ET EXPLOIT Microsoft Exchange - InboxRules.svc Access Observed Following Successful ProxyToken Attack"; flow:established,to_server; http.uri; content:"/ecp/"; nocase; content:"RulesEditor/InboxRules.svc/"; fast_pattern; content:"?msExchEcpCanary="; xbits:isset,ET.proxytoken.500,track ip_src,expire 30; classtype:attempted-admin; sid:2033836; rev:1; metadata:attack_target Server, created_at 2021_08_30, deployment Perimeter, deployment Internal, confidence High, signature_severity Major, tag Exploit, updated_at 2021_08_30, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application;)

Created:

Aug 30, 2021, 12:00 PM

Updated:

Aug 30, 2021, 12:00 PM

DB Created:

Sep 21, 2024, 3:00 AM

DB Updated:

Sep 21, 2024, 3:00 AM

Filename:

rules/emerging-exploit.rules