Cxor Infostealer actively spreading in the wild.

December 14, 2017

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

The Malware gathers confidential information from the computer such as login details, passwords; financial information sends it to its own C&C Server.

Infection Cycle:

The Malware adds the following files to the system:

  • Malware.exe

    • %Userprofile% svchost.exe [Fake SvcHost.exe]

    • % Userprofile%Local SettingsApplication DataGDIPFONTCACHEV1.DAT [ LogData ]

The Malware adds the following keys to the Windows registry to ensure persistence upon reboot:

Once the computer is compromised, the malware copies its own executable file to Userprofile folder and runs following commands:

A user's data can be very valuable for an attacker, thereby more data translates to more profit. The main goal of this malware is to get as much user data as possible. The malware also performs key logging and steals clipboard data from target and saves in following registry key:

Command and Control (C&C) Traffic

Cxor.A performs C&C communication over port 1177. The malware sends a victim's system information

to its own C&C server via following format, here are some examples:

SonicWall Gateway AntiVirus provides protection against this threat via the following signature:

  • GAV: Cxor.A (Trojan)