Dimnie Trojan

A new phishing campaign that attempts to infect computers with an advanced malware trojan has been discovered.

Threat ID:: CC-1316
Category:: Spyware, Trojan
Threat Severity:: Low
Threat Vector:: Email spam
Published:: 11 April 2017 12:00 AM

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

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Summary

A new phishing campaign that attempts to infect computers with an advanced malware trojan has been discovered.

Affected platforms

The following platforms are known to be affected:

Microsoft Windows

Microsoft Windows - all versions

Threat details

Dimnie the reconnaissance and espionage trojan has the ability to harvest credentials, download sensitive files, take screenshots, log keystrokes on 32-bit and 64-bit architectures, download additional malware on infected systems and self-destruct when ordered to. The malware has largely flown under the radar for the past three years due to its stealthy command and control methods.

The attack begins by spamming the email inboxes of users with fake, infected job offers. The messages used in this campaign attempt to trick the victims into running an attached malicious .doc file. The doc file contains embedded macro code, which if allowed, executes a PowerShell command to download and install the Dimnie trojan – malware that can be controlled remotely, enabling attackers to hijack infected PCs and install additional malware.

Dimnie is not new; it first appeared in early 2014, but the use of stealthy command and control (C&C) methods in the new version of the Dimnie malware helped the threat remain unnoticed until this year.

Remediation advice

To prevent and detect a Trojan 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.

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.

Last edited: 17 February 2020 11:29 am