alert tcp-pkt $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Win32/Aurora Stealer Sending System Information"; flow:established,to_server; content:"|7b 22|Type|22 3a 22|"; startswith; content:"|22|Type|22 3a 22|END_PACKET_ALL_SEND|22 2c 22|ENT_P|22 3a|"; distance:0; fast_pattern; content:!"User-Agent|3a 20|"; content:!"|20|HTTP/1."; reference:md5,5462d6b31356921cf1e8aa358db3f3de; classtype:trojan-activity; sid:2043203; rev:1; metadata:attack_target Client_Endpoint, created_at 2023_01_04, deployment Perimeter, malware_family AuroraStealer, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_01_04;)