Rule History

alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET RETIRED PlanetStealer Data Exfiltration Attempt"; flow:established,to_server; http.method; content:"POST"; http.uri; content:"/submit/file"; http.header_names; content:!"|0d 0a|Referer|0d 0a|"; http.user_agent; content:"Go-http-client/"; http.request_body; content:"Content-Disposition|3a 20|form-data|3b 20|name|3d 22|file|22 3b 20|filename|3d 22|C|3a 5c 5c|Users|5c 5c|"; content:"|5c 5c|AppData|5c 5c|Local|5c 5c|Temp|5c 5c|"; fast_pattern; within:75; pcre:"/^[a-zA-Z0-9]{8}-[a-f0-9]{8}-([a-f0-9]{4}-){3}[a-f0-9]{12}/R"; content:".zip|22 0d 0a|Content-Type|3a 20|application/octet-stream|0d 0a 0d 0a|PK"; within:100; content:"passwords.txt"; within:50; reference:md5,99a0225b149f9a918aaccafa73c42a1f; reference:url,community.emergingthreats.net/t/planetstealer; reference:url,app.any.run/tasks/a55c931e-99d7-4b32-8672-2b5733ae3dd4; classtype:trojan-activity; sid:2051492; 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_05, deployment Perimeter, former_category MALWARE, malware_family PlanetStealer, performance_impact Low, confidence High, signature_severity Major, tag InfoStealer, tag PlanetStealer, updated_at 2025_07_14, reviewed_at 2025_07_14; target:src_ip;)