PRB-Backdoor PowerShell Trojan

PRB-Backdoor is a trojan that exploits PowerShell to create a backdoor and steal information from infected devices.

Threat ID:: CC-2408
Category:: Trojan
Threat Severity:: Low
Threat Vector:
Published:: 18 May 2018 12:00 AM

Report a cyber attack: call 0300 303 5222 or email [email protected]

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Summary

PRB-Backdoor is a trojan that exploits PowerShell to create a backdoor and steal information from infected devices.

Affected platforms

The following platforms are known to be affected:

Microsoft Windows

Microsoft Windows - All versions

Threat details

The malware is distributed in a macro-enabled Word document, most likely delivered via spam emails. When the document is opened and the macros are run, a series of PowerShell scripts held within the document are decoded and executed.

PRB-Backdoor establishes communication with a Command and Control server and can be instructed to perform a wide range of functions. These include reading and writing files, taking screenshots and stealing web browsing history.

Remediation advice

To prevent and detect an infection, ensure that:

Remediation steps

Type	Step
	A robust program of education and awareness training is delivered to users to ensure they don’t open attachments or follow links within unsolicited emails. All operating systems, antivirus and other security products are kept up to date. All day to day computer activities such as email and internet are performed using non-administrative accounts. Strong password policies are in place and password reuse is discouraged. Network, proxy and firewall logs should be monitored for suspicious activity. User accounts accessed from infected machines should be reset on a clean computer.

Type

Step

A robust program of education and awareness training is delivered to users to ensure they don’t open attachments or follow links within unsolicited emails.
All operating systems, antivirus and other security products are kept up to date.
All day to day computer activities such as email and internet are performed using non-administrative accounts.
Strong password policies are in place and password reuse is discouraged.
Network, proxy and firewall logs should be monitored for suspicious activity.
User accounts accessed from infected machines should be reset on a clean computer.

Last edited: 17 February 2020 12:52 pm