DETECTION OVERVIEW
Risk Factors
The DoublePulsar Windows kernel-mode implant is a command-and-control (C&C) agent that can enable an unauthenticated attacker to run arbitrary shellcode with kernel privileges. This agent is uncommon because it requires sophisticated exploits such as EternalBlue to install the implant.
Kill Chain
Risk Score
78
The DoublePulsar implant is installed in the kernel memory of a victim and then waits for further commands. The attacker can leverage normal SMB transactions to send a customized request to the victim device with a method (TRANS2_Session_SETUP) and a command. When the victim device responds to a ping command, for example, the attacker can then send a request with another command, such as the exec command. The exec command tells the implant to run malicious shellcode.
Disable SMB file sharing unless required
Implement network segmentation, security zones, and firewall policies that limit how devices can communicate
Upgrade devices to Windows 10, or apply the Microsoft Security bulletin MS17-010 security update to prevent SMB exploits from installing DoublePulsar