Regin Malware (aka Prax or QWERTY) consists of a trojan and a backdoor that are widely customizable to fit the target. The platform excels at remaining undetected and obfuscating its indicators of compromise. Regin is a modular platform, reminiscent of Flame, Duqu, and Stuxnet. The Regin backdoor is a five stage modular component and each stage after the first is hidden and encrypted. After each successful installation of a stage, the next stage is decrypted and installed. Each piece provides as little information as possible about the total component. If any stage fails then the installation terminates. The flexibility of the Regin platform means that the actor can customize the payload to the target. Consequently, Regin has dozens of discovered payloads and likely has many more that remain known only to the actor. In general, the platform features several remote access trojans (RATs), and tools to capture screenshots, log keystrokes, monitor network traffic, steal credentials, recover deleted files, and hijack the point and click functions of the mouse. According to Symantec, advanced payloads also contained “Microsoft IIS web server traffic monitor and a traffic sniffer of the administration of mobile telephone base controllers.” The platform also features anti-forensic capabilities, a custom-built encrypted virtual file system (EVFS), and RC5 encryption. Communication with the C&C servers occurs over ICMP/ ping, embedded commands in HTTP cookies, and custom TCP and UDP protocols.