Weir Group PLC (LSE:WEIR) shares fell on Friday after the engineer said third-quarter profits were hit by a "sophisticated" ransomware attack.
Boss Jon Stanton said in an announcement late on Thursday that the mining equipment company had responded "quickly and comprehensively to what was a sophisticated external attack" but the actions to protect infrastructure and data "led to significant temporary disruption".
The FTSE 250 group said the attack happened towards the end of the third quarter but there was no impact on orders during the quarter, with its facilities all operational, but profitability was impacted because revenues will be deferred on shipment delays and 'under-recoveries', which normally result from selling at below cost price.
Weir said it now expects a full-year profit before tax of £230-245m because of the attempted hack.
The shares dropped 6% in early trading before recovering to a loss of around 3% at 1,598p.