alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET RETIRED Bitter APT Related Activity (GET)"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"/mml.php"; fast_pattern; http.user_agent; content:"curl/"; http.header_names; content:"|0d 0a|Host|0d 0a|User-Agent|0d 0a|Accept|0d 0a 0d 0a|"; reference:url,infosec.exchange/@ginkgo/112047866464514906; reference:md5,10f4479d5f531def842a712277ae9611; classtype:trojan-activity; sid:2051513; rev:2; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, affected_product Windows_11, attack_target Client_Endpoint, tls_state plaintext, created_at 2024_03_06, deployment Perimeter, former_category MALWARE, malware_family Bitter_APT, performance_impact Low, confidence High, signature_severity Major, tag Bitter_APT, tag Malicious_LNK, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_10_03, reviewed_at 2024_10_03; target:src_ip;)