ET WEB_SERVER Win32/SessionManager Backdoor ReadFile Command (Inbound)

Query · suricata

flow:established,to_server;
http.cookie;
content:"SM_SESSIONID=ReadFile-"; fast_pattern;
Raw source ET WEB_SERVER Win32/SessionManager Backdoor ReadFile Command (Inbound) · Suricata
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Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert http $EXTERNAL_NET any -> $HOME_NET any (
    msg:"ET WEB_SERVER Win32/SessionManager Backdoor ReadFile Command (Inbound)";
    flow:established,to_server;
    http.cookie;
    content:"SM_SESSIONID=ReadFile-"; fast_pattern;
    reference:url,securelist.com/the-sessionmanager-iis-backdoor/106868/;
    classtype:trojan-activity;
    sid:2037218; rev:1;
    metadata:attack_target Server, created_at 2022_06_30, deployment Perimeter, deployment Internal, malware_family SessionManager, confidence High, signature_severity Major, tag Exploit, updated_at 2022_06_30, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application;
)

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