Global hackers have unleashed a brace of attacks in recentmonths, but while their haul in bitcoin has been paltry, therevenue hit to companies infected is reaching into the hundreds ofmillions of dollars.

The WannaCry ransomware that spread in May featured a flaweddesign that led to its prompt shutdown, and June's computer viruscalled Petya was designed to wipe data rather than collect money.The two attacks netted the attackers around $140,000, according toanalysis of their bitcoin wallets.

The fallout for companies affected is proving costlier. Niveaskin-cream maker Beiersdorf said last Thursday that Petya cost 35million euros ($41.5 million) in first-half sales. The company hasyet to report the costs of held inventory and halted production in17 plants. Computers at its Hamburg, Germany, headquarters andnearly 160 global offices were also knocked off-line. “We haveworked here day and night, 24-7, across the globe,” CEO StefanHeidenreich told analysts.