alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE StormKitty Exfil via AnonFiles"; flow:established,to_server; http.start; content:"POST /upload?token=43a7df2f0395152e HTTP/1.1|0d 0a|Content-Type|3a 20|multipart/form-data|3b|"; startswith; fast_pattern; http.host; content:"api.anonfiles.com"; bsize:17; reference:md5,74d2206a0f29c6d975cba20028284ca2; classtype:command-and-control; sid:2031020; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2020_10_14, deployment Perimeter, deployment SSLDecrypt, malware_family StormKitty, performance_impact Low, confidence High, signature_severity Major, updated_at 2020_10_14;)