Rule History

alert tcp $HOME_NET 3256 -> any any (msg:"ET MALWARE Quad7 Botnet - Outbound zylogin Telnet Prompt from Compromised Endpoint"; flow:established,to_client; content:"zylogin|3a|"; fast_pattern; startswith; reference:url,blog.sekoia.io/a-glimpse-into-the-quad7-operators-next-moves-and-associated-botnets/; classtype:trojan-activity; sid:2064294; rev:1; metadata:attack_target Networking_Equipment, tls_state plaintext, created_at 2025_09_04, deployment Perimeter, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2025_09_04; target:src_ip;)