MaMi DNS Trojan

MaMi is a new piece of malware that targets macOS devices and allows an attacker to redirect users to malicious websites.

Threat ID:: CC-1949
Category:: Trojan
Threat Severity:: Low
Threat Vector:: Download
Published:: 18 January 2018 12:00 AM

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

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Summary

MaMi is a new piece of malware that targets macOS devices and allows an attacker to redirect users to malicious websites.

Affected platforms

The following platforms are known to be affected:

macOS

Apple macOS - all versions

Threat details

When a user is coerced into downloading and running MaMi, it installs a local certificate and changes the DNS settings. An attacker can then hijack a browsing session to display advertising or malicious content such as phishing forms, which can lead to passwords and other sensitive information being stolen.

MaMi can also take screenshots, simulate mouse pointer activity, download/upload files and execute other commands.

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. To remediate a MaMi infection: Reset the DNS settings. Delete the malicious certificate.

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.

To remediate a MaMi infection:

Reset the DNS settings.
Delete the malicious certificate.

Last edited: 17 February 2020 12:47 pm