alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Gamut Spambot Checkin"; flow:established,to_server; flowbits:set,ETGamut; http.uri; content:"file=SenderClient.conf"; nocase; fast_pattern; endswith; http.header_names; content:!"Referer|0d 0a|"; reference:url,www.trustwave.com/en-us/resources/blogs/spiderlabs-blog/gamut-spambot-analysis; reference:md5,f00f3f47062646f900aa327b1d5ca3a1; classtype:command-and-control; sid:2018245; rev:8; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2014_03_11, deployment Perimeter, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_05_01; target:src_ip;)