alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Various Ransomware/Stealer Style External IP Address Check (myip .ch)"; flow:established,to_server; http.start; content:"GET|20|/|20|HTTP/1.1|0d 0a|Host|3a 20|www.myip.ch|0d 0a|Accept|3a 20|*/*|0d 0a|"; bsize:50; fast_pattern; http.header_names; content:!"User-Agent"; content:!"Referer"; reference:md5,c596d787d0848722d393a4a5945b3e15; classtype:trojan-activity; sid:2029933; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2020_04_20, deployment Perimeter, confidence High, signature_severity Major, tag Ransomware, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_03_21, mitre_tactic_id TA0040, mitre_tactic_name Impact, mitre_technique_id T1486, mitre_technique_name Data_Encrypted_for_Impact;)