alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE HumanitarianBait Infostealer CnC File Exfil"; flow:established,to_server; http.method; content:"POST"; http.uri; content:"/upload"; http.request_body; content:"Content-Disposition|3a 20|form-data|3b 20|name|3d 22|client|5f|id|22|"; content:"Content-Disposition|3a 20|form-data|3b 20|name|3d 22|kind|22|"; fast_pattern; distance:0; content:"document"; distance:0; content:"Content|2d|Disposition|3a 20|form|2d|data|3b 20|name|3d 22|file|22 3b 20|filename|3d|"; distance:0; reference:url,cyble.com/blog/operation-humanitarianbait-infostealer-campaign/; classtype:command-and-control; sid:2069254; rev:1; metadata:affected_product Windows_11, affected_product Windows_8, affected_product Windows_10, attack_target Client_Endpoint, tls_state TLSDecrypt, created_at 2026_05_11, deployment Perimeter, deployment SSLDecrypt, confidence High, signature_severity Major, tag c2, updated_at 2026_05_11, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1071, mitre_technique_name Application_Layer_Protocol;)