alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE FakeEXT Data Exfiltration Attempt"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"/grab/put?name|3d|"; startswith; fast_pattern; content:"value|3d|"; content:"css_id|3d|"; content:"uid|3d|"; pcre:"/^[a-f0-9]{8}([a-f0-9]{4}-){2}[a-f0-9]{3}-[a-f0-9]{12}/R"; content:"url|3d|"; reference:url,securityintelligence.com/posts/fakext-targeting-latin-american-banks/; classtype:trojan-activity; sid:2051542; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, affected_product Windows_11, attack_target Client_Endpoint, tls_state TLSDecrypt, created_at 2024_03_07, deployment Perimeter, deployment SSLDecrypt, malware_family FakeEx, performance_impact Low, confidence High, signature_severity Major, tag FakeEXT, updated_at 2024_03_07; target:src_ip;)