alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE MuddyWater APT Related Telegram Activity"; flow:established,to_server; http.uri; content:"/bot"; startswith; content:"/sendMessage?chat_id="; content:"&text=/com"; fast_pattern; pcre:"/[0-9]+\x20/R"; http.host; content:"api.telegram.org"; bsize:16; reference:url,www.ic3.gov/Media/News/2022/220224.pdf; classtype:trojan-activity; sid:2035364; rev:3; metadata:attack_target Client_Endpoint, created_at 2022_03_01, deployment Perimeter, malware_family MuddyWater, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_07_17;)