National Cyber Security Centre
How organisations can protect their networks from the ‘Trickbot’ banking trojan.
What is Trickbot?
Trickbot is an established banking trojan used in cyber attacks against businesses and individuals in the UK and overseas. Trickbot attacks are designed to access online accounts, including bank accounts, in order to obtain personally identifiable information (PII). Criminals use PII to commit identity fraud.
In some cases, Trickbot is used to infiltrate a network. Once inside it can be used to deploy other malware, including ransomware and post-exploitation toolkits.
Trickbot targets victims with well-crafted phishing emails, designed to appear as though sent from trusted commercial or government brands. These emails will often contain an attachment (or link to an attachment) which victims are instructed to open, leading to their machine being exploited.
What can Trickbot do?
Trickbot can download new capabilities onto a victim’s device (as well as updating those it has already deployed) without interaction from the victim.
- steal sensitive information, including banking login details and memorable information
- gather detailed information about infected devices and networks
- steal saved online account passwords, cookies and web history
- steal login credentials for infected devices, including domain credentials
- connect infected devices to malicious, criminally-controlled networks over the internet, giving criminals full control of them
- spread across a victim’s network by infecting other devices, including those on trusted domains (known as lateral movement), often using SMB shares
- download further malicious files such as Remote Access Tools, VNC clients and ransomware
Dealing with a possible Trickbot infection
Victims of Trickbot have observed a number of malicious activities, including:
- unauthorised access attempts to online accounts
- successful, fraudulent bank transfer activity
- unauthorised changes to their network infrastructure
To protect business and personal banking facilities (including where employees have accessed personal banking from work devices) you should:
- consider changing passwords and memorable information for any corporate, business or personal internet banking facilities (or other online resources) accessed from the infected network
- review bank and credit card statements for suspicious activity, and report any findings to your bank
- advise any employees who have accessed online banking facilities from the affected network to do likewise
If you (or your employees) have been the victim of fraud, report it to Action Fraud.
Protective action to take now
Run a full scan on all devices using up-to-date antivirus software, such as Windows Defender. This should detect and remove any Trickbot infection.
- Use the latest supported versions of operating systems and software, apply security patches promptly, use antivirus and scan regularly to guard against known malware threats.
- Keep antivirus software up to date, and consider the use of a cloud-backed antivirus product that can benefit from the improved threat intelligence and advanced analysis which large scale operations bring. Ensure that antivirus software is capable of scanning MS Office macros.
- Make sure important data is stored in an offline backup, to reduce the impact of ransomware.
- Use multi-factor authentication (MFA), also known as two-step verification or 2-factor authentication (2FA).
- Prevent and detect lateral movement in your enterprise networks.
- Implement architectural controls for network segregation. This would help mitigate the exposure of the SMB issues described above.
- Set up a security monitoring capability so you can collect the data needed to analyse network intrusions.
- If supported by your operating environment, consider whitelisting permitted applications. This will help prevent malicious applications from running.
Latest News from
National Cyber Security Centre
Cyber Advisor26/07/2022 12:05:00
New Cyber Advisor scheme will offer assured cyber security consultancy services to small and medium sized companies, helping them achieve a minimum standard of security.
Solicitors urged to help stem the rising tide of ransomware payments11/07/2022 11:15:00
The NCSC and ICO share joint letter with the Law Society after increases in ransomware payments.
NCSC urges organisations to prepare for the long haul on Russia-Ukraine05/07/2022 15:20:00
Guidance issued advises how organisations can avoid staff burnout during an extended period of heightened cyber threat.
Commercial cyber capabilities must be used legally and responsibly, says UK NCSC CEO29/06/2022 16:20:00
Lindy Cameron's speech at Tel Aviv Cyber Week emphasised the importance of partnerships and international regulation of sophisticated cyber capabilities.
UK joins international cyber agency partners to release supply chain guidance12/05/2022 14:20:00
Joint advisory sets out practical steps to take for managed service providers and their customers to protect themselves.
NCSC joins industry to offer unprecedented protection for public from scams12/05/2022 13:20:00
Data sharing collaboration will allow ISPs to instantly block access to fraudulent sites.
Organisations offered streamlined guidance to help them move to the cloud12/05/2022 11:15:00
Cloud security guidance refreshed to support small businesses to large organisations moving to cloud-based services.
Chancellor of the Duchy of Lancaster speech at Cyber UK11/05/2022 16:12:00
Steve Barclay today gave a speech at the Cyber UK conference in Wales.