alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET PHISHING Successful IRS Credential Phish 2022-04-25"; flow:established,to_server; http.method; content:"POST"; http.uri; content:"/geoAPIChecker/geochecker.php"; bsize:29; fast_pattern; http.content_type; content:"WebKitFormBoundary"; http.request_body; content:"Content|2d|Disposition|3a 20|form|2d|data|3b 20|name|3d 22|ai|22|"; content:"Content|2d|Disposition|3a 20|form|2d|data|3b 20|name|3d 22|pr|22|"; distance:0; reference:url,resecurity.com/blog/article/cybercriminals-deliver-irs-tax-scams-phishing-campaigns-by-mimicking-government-vendors; classtype:credential-theft; sid:2036362; rev:2; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2022_04_25, deployment Perimeter, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_04_25;)