alert http any any -> any any (msg:"ET MALWARE DCRat CnC Activity M13"; flow:established,to_server; http.method; content:"GET"; http.uri; content:".php?type=__ds_getdata&__ds_getdata_user="; fast_pattern; offset:140; depth:60; http.header_names; to_lowercase; content:!"|0d 0a|referer|0d 0a|"; content:!"|0d 0a|user-agent|0d 0a|"; content:!"|0d 0a|connection|0d 0a|"; reference:md5,b478d340a787b85e086cc951d0696cb1; classtype:command-and-control; sid:2034741; rev:4; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2021_12_15, deployment Perimeter, malware_family DCRat, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_04_26;)