Security experts have warned about opportunistic hackers and malware providers seeking to take advantage of the coronavirus lockdown.
Following a warning earlier this week from Interpol, global firms say that 'bad actors' are ramping up attacks as companies grapple with workers logging in from home.
According to cybersecurity firm Trend Micro, 'business email compromise' attempts - including CEO fraud - rose by almost a quarter in February, as countries started to deal with the pandemic.
"IT security teams around the world may be under significant pressure today, as the corporate attack surface expands thanks to mass home working demands in the face of the Covid-19 epidemic. But now, more than ever, they must be on high alert as opportunistic cyber attackers look to strike," said Ian Heritage, cloud security architect at Trend Micro.
The news came after Zoom announced a tightening of its security measures.
The popular online video service - which has gone from 10 million users to over 200 million because of the coronavirus lockdown - has been caught out with lax privacy and security protocols.
There is a practice of 'Zoombombing', where hackers or pranksters search for Zoom ID codes and then join a meeting uninvited, only to force unwanted content on to others' screens using the 'share screen' function.
It is a particular problem with large meetings, where hosts are less likely to individually scrutinise the credentials of each joining participant.
In response, Zoom will now require a 'waiting room' for people joining, giving the host more control.