alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MOBILE_MALWARE Android.KorBanker Fake Banking App Install CnC Beacon"; flow:established,to_server; http.method; content:"POST"; nocase; http.uri; content:"/send_sim_no.php"; fast_pattern; endswith; http.request_body; content:"_no="; depth:16; http.header_names; to_lowercase; content:!"|0d 0a|referer|0d 0a|"; reference:url,www.fireeye.com/blog/technical/targeted-attack/2013/11/dissecting-android-korbanker.html; reference:md5,a68bbfe91fab666daaf2c070db00022f; classtype:command-and-control; sid:2017787; rev:6; metadata:affected_product Android, attack_target Client_Endpoint, created_at 2013_11_28, deployment Perimeter, signature_severity Major, tag Android, tag c2, updated_at 2024_04_21, mitre_tactic_id TA0010, mitre_tactic_name Exfiltration, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel;)