alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET EXPLOIT_KIT Spelevo VBS Payload Downloaded"; flow:established,to_server; http.method; content:"POST"; http.uri; content:"&00000111&11"; fast_pattern; endswith; http.content_len; byte_test:0,=,0,0,string,dec; http.header_names; content:"|0d 0a|Host|0d 0a|Content-Length|0d 0a|Cache-Control|0d 0a|Cookie|0d 0a 0d 0a|"; depth:49; classtype:exploit-kit; sid:2028865; rev:4; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2019_10_18, deployment Perimeter, malware_family Spelevo_EK, signature_severity Major, tag Spelevo_EK, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_11_09;)