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

SID: 2033836Rev: 10 views
History
Sourceet/open
CreatedAugust 30, 2021
UpdatedAugust 30, 2021
Classificationattempted-admin
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;)

Metadata

attack targetServer
created at2021_08_30
deploymentInternal
confidenceHigh
signature severityMajor
tagExploit
updated at2021_08_30
mitre tactic idTA0001
mitre tactic nameInitial_Access
mitre technique idT1190
mitre technique nameExploit_Public_Facing_Application

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