But with the damage and disruption still coming into focus, security experts worry the sudden explosion of malicious software may have been more sinister than a criminally minded shakedown of computer users.
"There may be a more nefarious motive behind the attack," Gavin O'Gorman, an investigator with US antivirus firm Symantec, said in a blog post.
"Perhaps this attack was never intended to make money (but) rather to simply disrupt a large number of Ukrainian organisations."
The rogue programme initially appeared to be ransomware, a fast-growing and lucrative breed of malicious software that encrypts its victims' data and holds it hostage until a payment is made.
Others, such as Russian anti-virus firm Kaspersky Lab, said that clues in the code suggest the program's authors would have been incapable of decrypting the data in any case, adding further evidence that the ransom demands were a smoke screen.
The timing was intriguing too: the malware explosion came the same day as the assassination of a senior Ukrainian military intelligence officer and a day before a national holiday celebrating a new constitution signed after the breakup of the Soviet Union.
Danish shipping giant A.P. Moller-Maersk, one of the global companies hardest hit by the malware, said Thursday that most of its terminals are now operational, though some terminals are "operating slower than usual or with limited functionality."
Problems have been reported across the shippers' global business, from Mobile, Alabama, to Mumbai in India. When The Associated Press visited the latter city's Jawaharlal Nehru Port Trust on Thursday, for example, it witnessed several hundred containers piled up at just two yards, out of more than a dozen yards surrounding the port.
"The port authorities, they are not able to reply (to) us. The shipping companies they also don't know what to do. ... We are actually in a fix because of all this.
Disclaimer: No Business Standard Journalist was involved in creation of this content
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
