alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Worm.Win32.Balucaf.A Checkin"; flow:established,to_server; http.uri; content:"/setting.ini"; fast_pattern; nocase; http.user_agent; content:"AutoIt"; startswith; nocase; http.header_names; content:!"|0d 0a|Accept|0d 0a|"; reference:url,www.microsoft.com/security/portal/Threat/Encyclopedia/Entry.aspx?Name=Worm%3AWin32%2FTupym.A; reference:url,www.securelist.com/en/descriptions/6349329/Worm.Win32.AutoRun.esf; reference:url,www.sophos.com/en-us/threat-center/threat-analyses/viruses-and-spyware/W32~Tupym-D/detailed-analysis.aspx; classtype:command-and-control; sid:2031450; rev:6; metadata:created_at 2011_09_24, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_03_12;)