Rule History

alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET RETIRED MacOS/MacStealer Data Exfiltration Attempt"; flow:established,to_server; http.method; content:"POST"; http.uri; content:"/uploadLog"; http.user_agent; content:"python-requests/"; startswith; http.request_body; content:"name|3d 22|build_id|22|"; content:"name|3d 22|buildname|22|"; fast_pattern; content:"name|3d 22|name|22|"; content:"name|3d 22|wallets|22|"; content:"name|3d 22|os|22|"; content:"name|3d 22|os_version|22|"; content:"name|3d 22|file|22 3b 20|filename|3d 22|"; content:".zip|22|"; distance:0; within:50; content:"|0d 0a 0d 0a|PK"; distance:0; content:"general_info.txt"; distance:0; reference:url,www.uptycs.com/blog/macstealer-command-and-control-c2-malware; classtype:trojan-activity; sid:2044789; rev:2; metadata:affected_product Mac_OSX, attack_target Client_Endpoint, created_at 2023_03_27, deployment Perimeter, former_category MALWARE, malware_family MacStealer, performance_impact Low, confidence High, signature_severity Major, tag MacStealer, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2025_07_14, reviewed_at 2025_07_14; target:src_ip;)