CrypRAT Infostealer actively spreading in the wild.


The SonicWall Capture Labs Threat Research Team observed reports of a new variant family of CrypRAT Infostealer  [CrypRAT.A] actively spreading in the wild.


Memory Snapshot of the CrypRAT Infostealer ( Raw and Encrypted Data )

Infection Cycle:

The Malware adds the following file to the system:

  • Malware.exe
    • %APPDATA%\roaming\system.exe

The Malware adds the following keys to the Windows registry:

    • 1
  • [HKEY_CURRENT_USER\Software\061c2e9167603fb87dafebfaad0bb29a]
    • Keylogger data

Once the computer is compromised, the Malware installs following components to record the activity of the user via key logging and clipboard:


The Malware terminates the Self-Extractor process and installs the System.exe [Key logger module] on the target system.


The Malware saves raw data in the following registry:

The Malware checks if data is available for transfer to the command and control (C&C) server every 10 seconds.

The Malware uses base64 to encrypt its strings as well as its network communication, here an example:


Command and Control (C&C) Traffic

CrypRAT.A performs C&C communication over port 1177. The Malware transfers stolen data in Base64 format, here are some examples:

SonicWall Capture Labs provides protection against this threat via the following signature:

  • GAV: CrypRAT.A (Trojan)


Security News
The SonicWall Capture Labs Threat Research Team gathers, analyzes and vets cross-vector threat information from the SonicWall Capture Threat network, consisting of global devices and resources, including more than 1 million security sensors in nearly 200 countries and territories. The research team identifies, analyzes, and mitigates critical vulnerabilities and malware daily through in-depth research, which drives protection for all SonicWall customers. In addition to safeguarding networks globally, the research team supports the larger threat intelligence community by releasing weekly deep technical analyses of the most critical threats to small businesses, providing critical knowledge that defenders need to protect their networks.