Versions (4)
Version DetailsCurrent
Rev: 4 • Jan 22, 2018, 12:00 PMET INFO Base64 Encoded powershell.exe in HTTP Response M3
alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET INFO Base64 Encoded powershell.exe in HTTP Response M3"; flow:established,from_server; http.content_type; content:"text/plain"; startswith; file.data; content:"wb3dlcnNoZWxsLmV4Z"; fast_pattern; reference:url,otx.alienvault.com/pulse/5a1348416dd9eb0c92d9897a; classtype:bad-unknown; sid:2025240; rev:4; metadata:created_at 2018_01_22, confidence High, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_08_24;)
Jan 22, 2018, 12:00 PM
Aug 24, 2020, 12:00 PM
Sep 21, 2024, 3:00 AM
Sep 29, 2025, 9:34 PM
rules/emerging-info.rules