alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Hangover Campaign Keylogger Checkin"; flow:established,to_server; http.uri; content:".php?fol="; fast_pattern; content:"&ac="; content:"AVs"; content:"OS"; content:"SystemDT"; content:"AppVersion"; content:"DropPath"; reference:md5,023d82950ebec016cd4016d7a11be58d; reference:url,enterprise.norman.com/resources/files/unveiling_an_indian_cyberattack_infrastructure_appendixes.pdf; classtype:command-and-control; sid:2016861; rev:4; metadata:created_at 2013_05_21, signature_severity Major, updated_at 2020_09_18;)