alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET RETIRED CIA Ransomware - wallpaper/readme retrieval attempt"; flow:established,to_server; http.method; content:"GET"; http.uri; pcre:"/^\/(?:image|readme)$/"; http.user_agent; content:"Go-http-client/"; startswith; fast_pattern; http.header_names; content:!"|0d 0a|Referer|0d 0a|"; content:"|0d 0a|Host|0d 0a|User-Agent|0d 0a|Accept-Encoding|0d 0a 0d 0a|"; reference:url,blog.phylum.io/phylum-detects-active-typosquatting-campaign-in-pypi; classtype:trojan-activity; sid:2042950; rev:2; metadata:affected_product Any, attack_target Client_and_Server, created_at 2022_12_15, deployment Perimeter, former_category MALWARE, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_09_23, reviewed_at 2024_09_23;)