Cyber criminals are targeting distracted workplaces.
Business leaders are being warned of increased cyber security threats during the festive season, with companies in Dorset.
Criminals are believed to be exploiting reduced staff numbers and lowered vigilance during the Christmas period, particularly targeting small and medium-sized enterprises.
Paul Kelly, head of cyber services at Azets, said: "While many businesses and individuals are preparing for festive celebrations, exchanging Secret Santa gifts and winding down for the holidays, cyber criminals are gearing up for one of their busiest periods of the year.
"Cyber threats are a year-round concern, but the holiday season creates a perfect storm for attackers as they look to steal critical data – which can include payroll and customer details and other sensitive information.
"Reduced staff numbers, increased online activity and the general distraction of the festive period make organisations more vulnerable.
"Criminals exploit this environment, knowing that companies may inadvertently drop their guard and leave the front door open to digital theft, creating malevolent opportunities for potential fraud, phishing attempts and ransomware threats."
Last year Azets raised the national alarm by exposing a highly convincing bogus HMRC compliance letter, which paved the way for fraudsters to take out loans in the names of directors and open up opportunities for VAT fraud.
Recent high-profile cyber attacks this year have affected major UK companies, including Marks & Spencer, Co-op, Jaguar Land Rover and Harrods, illustrating the growing scale and complexity of the threat.
Mr Kelly said: "The holiday season creates a perfect storm for attackers.
"Reduced staff numbers, increased online activity and the general distraction of the festive period make organisations more vulnerable."
Mr Kelly advises businesses to remind staff to stay alert and report any suspicious activity without delay.
Other recommended steps include using strong passwords, enabling two-factor authentication, keeping software up to date and performing regular backups.
Organisations are also encouraged to review their incident response plans, scan for vulnerabilities and consider whether 24/7 monitoring and outsourced cyber support are necessary.
Azets provides support to more than 80,000 UK clients and has offices in Poole and Blandford.
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