alert dns $HOME_NET any -> any any (msg:"ET MOBILE_MALWARE Android/Bankbot.HH!tr DNS Lookup"; dns.query; content:"b1k51.gdn"; startswith; fast_pattern; endswith; nocase; reference:url,blog.fortinet.com/2017/09/19/a-look-into-the-new-strain-of-bankbot; classtype:trojan-activity; sid:2024735; rev:6; metadata:affected_product Android, attack_target Mobile_Client, created_at 2017_09_20, deployment Perimeter, malware_family Android_BankBot, confidence Medium, signature_severity Major, tag Android, updated_at 2024_04_13;)