Rule History

alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE [ANY.RUN] Observed Malicious Powershell Related Activity (GET)"; flow:established,to_server; http.method; content:"GET"; http.uri; pcre:"/^\/[a-zA-Z0-9]{1,8}(?:([0-9][A-Za-z])|([a-z][\dA-Z])|(?:[A-Z][\da-z])|([a-z]\d[\da-z]))[a-zA-Z0-9]{0,8}\/[a-zA-Z0-9]{1,8}(?:([0-9][A-Za-z])|([a-z][\dA-Z])|([A-Z][\da-z])|([a-z]\d[\da-z]))[a-zA-Z0-9]{0,8}$/"; http.host; pcre:"/^\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}$/"; http.user_agent; content:"WindowsPowerShell"; fast_pattern; http.header_names; content:"|0d 0a|User-Agent|0d 0a|Host|0d 0a|Connection|0d 0a 0d 0a|"; bsize:34; reference:md5,26c1f8c5631a5b633c324e7986dc7054; reference:url,community.emergingthreats.net/t/lgoogloader-pikabot-redline-rules/597/; classtype:trojan-activity; sid:2046046; rev:1; metadata:attack_target Client_Endpoint, created_at 2023_05_31, deployment Perimeter, performance_impact Low, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_12_28; target:src_ip;)