alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET EXPLOIT LastPass RCE Attempt"; flow:established,to_client; file.data; content:"getboundingclientrect"; nocase; content:"mouseevent"; fast_pattern; content:"dispatchevent"; nocase; pcre:"/^\s*\x28\s*new\s*MouseEvent\s*\x28\s*[\x22\x27]\s*click/Rsi"; content:"addeventlistener"; nocase; pcre:"/^\s*\x28\s*[\x22\x27]\s*message/Rsi"; content:!"paymentsheet"; nocase; reference:url,project-zero.issues.chromium.org/issues/42452418; classtype:trojan-activity; sid:2022989; rev:4; metadata:affected_product Web_Browser_Plugins, attack_target Client_Endpoint, created_at 2016_07_28, deployment Perimeter, performance_impact Low, confidence Medium, signature_severity Major, updated_at 2025_04_09;)