The Trickbot group extorted at least $180m (£145m) across the world, including at least £27m from 149 victims in the UK, where it targeted schools, councils and businesses, according to the National Crime Agency (NCA).

The gang is accused of infecting millions of computers worldwide with malware.

It also offered support for Russia's conflict in Ukraine and key members are believed to maintain links to Russian intelligence services from whom they have likely received instructions, the Foreign Office said.

The gang also threatened those who opposed the Kremlin's invasion, according to the government department.

The UK and US on Thursday imposed sanctions on 11 of its members.

NCA Director General of Operations Rob Jones said: "These sanctions are a continuation of our campaign against international cyber criminals.

"Attacks by this ransomware group have caused significant damage to our businesses and ruined livelihoods, with victims having to deal with the prolonged impact of financial and data losses.

"These criminals thought they were untouchable, but our message is clear: we know who you are and, working with our partners, we will not stop in our efforts to bring you to justice."

It comes after seven members of the same group were hit with sanctions in February.

All 18 are now subject to travel bans and asset freezes as well as being restricted in their use of the legitimate global financial system.

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While largely symbolic, given the sanctions already imposed on Russia and the unlikelihood of hackers based there, officials say they can make it harder for them to launder money.

US officials have indicted nine people, including seven of the latest group to be sanctioned, tied to the gang's malware and the Conti ransomware schemes.

Foreign Secretary James Cleverly said: "These cyber-criminals thrive off anonymity, moving in the shadows of the internet to cause maximum damage and extort money from their victims.

"Our sanctions show they cannot act with impunity. We know who they are and what they are doing.

"By exposing their identities, we are dismantling their business models, making it harder for them to target our people, our businesses and our institutions."