TimpDoor Android Proxy Malware

First observed in March 2018, TimpDoor is an Android-based malware that is used to create a proxy server on affected devices.

Threat ID:: CC-2748
Category:: Trojan
Threat Severity:: Low
Threat Vector:: Download
Published:: 25 October 2018 12:00 AM

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

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Summary

First observed in March 2018, TimpDoor is an Android-based malware that is used to create a proxy server on affected devices.

Affected platforms

The following platforms are known to be affected:

Android

Google Android - All versions

Threat details

Unlike most Android malware, TimpDoor is not installed through the Google Play Store, but is instead delivered as a malicious link in SMS and IM messages. When opened, these links direct to a webpage disguised as a legitimate website, where the user will be asked to install an application.

Once installed, TimpDoor will initiate a secure shell connection to a command and control (C2) server before hiding itself. It will then create a SOCKS proxy and begin forwarding user, device and network information to the C2 server. Traffic can also be sent to the proxy, allowing an attacker to bypass network-based security measures.

Remediation advice

Users are advised to only install trusted applications on their devices. Organisations should consider restricting user accounts on corporate devices or using application whitelisting.

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, anti-virus and other security products are kept up-to-date. Regular anti-virus and security scans are performed on your organisation’s estate. All day-to-day computer activities such as email and internet are performed using non-administrative accounts. Strong password policies are in place. Network, proxy and firewall logs should be monitored for suspicious activity. User accounts accessed from affected devices should be reset on a clean computer. Your organisation adopts a holistic all-round approach to Cyber Security as advocated by the 10 Steps to Cyber Security.

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, anti-virus and other security products are kept up-to-date.
Regular anti-virus and security scans are performed on your organisation’s estate.
All day-to-day computer activities such as email and internet are performed using non-administrative accounts.
Strong password policies are in place.
Network, proxy and firewall logs should be monitored for suspicious activity.
User accounts accessed from affected devices should be reset on a clean computer.
Your organisation adopts a holistic all-round approach to Cyber Security as advocated by the 10 Steps to Cyber Security.

Last edited: 17 February 2020 12:55 pm