rule Zeus_Toolkit_Builder meta: description = "Detects Zeus builder artifacts" strings: $s1 = "tdss.dll" wide ascii $s2 = "zeus_config.bin" wide $s3 = 8B 45 08 50 8B 4D FC 51 E8 ?? ?? ?? ?? 83 C4 08 condition: any of ($s1,$s2) or $s3

Instead of using Zeus (obsolete, Windows-only, well-detected), use modern frameworks:

| Capability | Technical Mechanism | |------------|----------------------| | | Man-in-the-browser via API hooking (IE, Firefox, Chrome) | | Form Grabbing | Hooks PR_Write (Netscape) or HttpSendRequestA/W (WinINET) | | SOCKS Proxy | Turns infected machine into a proxy for fraudulent transactions | | Persistent | Adds registry keys ( HKCU\Software\Microsoft\Windows\CurrentVersion\Run ) | | Anti-Analysis | Detects sandboxes, debuggers, and AV processes (e.g., vmware.exe ) | | Stealing | FTP/IMAP/POP3 passwords, digital certificates, cached credentials |

The toolkit's source code was leaked to the public in 2011, which led to a massive wave of new, sophisticated variants developed by various independent groups.