"Financially-motivated attackers are sending social- engineering e-mails to small and medium businesses (SMBs) in India, the UK and the US in order to deliver Backdoor.Breut and Trojan.Nancrat," Symantec said in a blog.
Attackers have been spreading two families of remote access Trojans (RATs) to small businesses in India (56 per cent), the US (23 per cent) and the UK (21 per cent) since the start of 2015, it added.
Symantec said the attackers operate with few resources, rely on social engineering rather than exploits, and use two publicly available RATs.
"The campaign has been occurring since at least early 2015. For most of the year, the targets were mainly located in India, while some others were in the US and other regions," it said.
However, activity in India and the US has dropped in the past few months while the number of infections in the UK has increased, Symantec added.
If the user opens the file, their computer is infected and gives the attackers complete control of the victim's computer.
Through these infections, the attackers can access the webcam and microphone, log keystrokes, steal files and passwords.
Symantec said users should be careful while opening attachments or clicking on links in suspicious e-mail messages.
Also, users should avoid providing any personal information while answering an e-mail and never enter personal information in a pop-up web page.
Besides, keep security software up to date and if the user is uncertain about an e-mail's legitimacy, they should contact the internal IT department, Symantec said.
You’ve reached your limit of {{free_limit}} free articles this month.
Subscribe now for unlimited access.
Already subscribed? Log in
Subscribe to read the full story →
Smart Quarterly
₹900
3 Months
₹300/Month
Smart Essential
₹2,700
1 Year
₹225/Month
Super Saver
₹3,900
2 Years
₹162/Month
Renews automatically, cancel anytime
Here’s what’s included in our digital subscription plans
Exclusive premium stories online
Over 30 premium stories daily, handpicked by our editors


Complimentary Access to The New York Times
News, Games, Cooking, Audio, Wirecutter & The Athletic
Business Standard Epaper
Digital replica of our daily newspaper — with options to read, save, and share


Curated Newsletters
Insights on markets, finance, politics, tech, and more delivered to your inbox
Market Analysis & Investment Insights
In-depth market analysis & insights with access to The Smart Investor


Archives
Repository of articles and publications dating back to 1997
Ad-free Reading
Uninterrupted reading experience with no advertisements


Seamless Access Across All Devices
Access Business Standard across devices — mobile, tablet, or PC, via web or app
