Versions (4)
Version DetailsCurrent
Rev: 1 • Jun 17, 2022, 12:00 PMET INFO Psiphon VPN Related Activity (POST)
alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET INFO Psiphon VPN Related Activity (POST)"; flow:established,to_server; http.method; content:"POST"; http.uri; content:"/"; bsize:1; http.header_names; content:"|0d 0a|Content-Length|0d 0a|Content-Type|0d 0a|Cookie|0d 0a|Accept-Encoding|0d 0a 0d 0a|"; fast_pattern; content:!"Referer"; http.content_type; content:"application/octet-stream"; bsize:24; http.cookie; pcre:"/^[A-Z]=[A-Za-z/+0-9=]{200,400}$/"; reference:md5,912e361d280d881980caca25cd0b80d4; classtype:bad-unknown; sid:2037033; rev:1; metadata:attack_target Client_Endpoint, created_at 2022_06_17, deployment Perimeter, performance_impact Moderate, confidence High, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_06_17;)
Jun 17, 2022, 12:00 PM
Jun 17, 2022, 12:00 PM
Sep 21, 2024, 3:00 AM
Sep 2, 2025, 9:35 PM
rules/emerging-info.rules