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;
)