alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET MALWARE Lumma Stealer Related Fake Captcha Page Inbound M2"; flow:established,to_client; http.response_body; content:"|3c|div|20|class|3d 22|recaptcha|2d|popup|22|"; content:"textToCopy|20 3d 20 22|powershell|2e|exe|20 2d|eC"; fast_pattern; reference:url,github.com/PaloAltoNetworks/Unit42-timely-threat-intel/blob/main/2024-08-28-IOCs-for-Lumman-Stealer-from-fake-human-captcha-copy-paste-script.txt; reference:url,x.com/Unit42_Intel/status/1829178013423992948; classtype:trojan-activity; sid:2055622; rev:1; metadata:attack_target Client_Endpoint, tls_state TLSDecrypt, created_at 2024_08_29, deployment Perimeter, deployment SSLDecrypt, malware_family Lumma_Stealer, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_08_29;)