Rule History

alert tcp-pkt $HOME_NET any -> $EXTERNAL_NET 443 (msg:"ET MALWARE Suspected Win32/HMR RAT/LOBSHOT Initial Handshake"; flow:established,to_server; dsize:34; content:"|25 56 0a dc|"; startswith; fast_pattern; reference:md5,f49e3a53cb88905982491b7e88740f33; reference:md5,dfcbc4d4be5cd43c26b1729ddb936df3; reference:md5,1fd2ad44d8a2f124a01a5cc4f8282c01; reference:md5,711114867e22b9573614b72756466e5a; reference:md5,f49e3a53cb88905982491b7e88740f33; reference:url,www.elastic.co/security-labs/elastic-security-labs-discovers-lobshot-malware; classtype:trojan-activity; sid:2045211; rev:1; metadata:attack_target Client_Endpoint, created_at 2023_04_27, deployment Perimeter, performance_impact Low, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_04_27; target:src_ip;)