alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Arkei/Vidar/Mars Stealer Variant DLL GET Request M2"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"/"; pcre:"/^(?:sqlite|mozglue|nss3|freebl3|softokn3)/R"; content:".dll"; within:4; endswith; http.user_agent; content:"|20 28|X11|3b 20|CrOS|20|x86_64|20|15329.59.0|29|"; fast_pattern; http.header_names; to_lowercase; content:!"|0d 0a|referer|0d 0a|"; reference:md5,7918013ae55de62f5e108342a464864c; classtype:trojan-activity; sid:2049203; rev:2; metadata:attack_target Client_Endpoint, created_at 2023_11_15, deployment Perimeter, deployment SSLDecrypt, performance_impact Low, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_04_27; target:src_ip;)