May 22, 2019
On March 19, the Norwegian multinational company Norsk Hydro detected abnormal activity in their servers and found that they were exposed to a very extensive and serious ransomware attack, that probably started in the US. Norsk Hydro has 35,000 employees in 40 countries and is one of the world's largest manufacturers of aluminum. They stated that the attack is going to cost the company between NOK 300 - 350 million and describes the attack as a global crisis.
Today, not all systems are running yet and they estimated that it may take several months before they are up and running again. The attack probably started as a targeted email attack, so-called spear phishing, which has allowed ransomware called LockerGoga to be installed and then spread throughout the network.
It is unclear whether there was a ransom, but preliminary information indicates that the purpose of the attack was to sabotage the business in order to a large extent reduce the company's operational ability. As soon as the attack was discovered, "the cord was pulled" from 22,000 computers and systems, thus also affecting non-infected devices.
In the end, the attack means disruption and reduced production of aluminum. So why would someone do this - we can so far only speculate.
"Targeted attacks like this one are becoming more common. Unfortunately, many still believe that ransomware is unusual. Next time, it may as well be your business that is hit. The fact that the attack on Norsk Hydro has received a great deal of attention is partly due to the fact that Norsk Hydro has had a relatively transparent approach to the attack and that they are a large listed company where there is an obligation to provide information.” - Jonas Lejon, IT security specialist and member of Holm Security's Advisory Board.
Ransomware is a type of malicious software with the purpose to blackmail organizations or persons by taking files hostage via encryption. The software sometimes also exploits vulnerabilities in the systems to spread. To lift the encryption or regain control of the computer, the extortionist requires a ransom, often in a traceable currency such as Bitcoin, or any other activity that favors the offender behind the program. Frequently, the ransom increases gradually after a deadline of a few days to stress the victim.
Here are some of the file extensions that LockerGoga targets to encrypt: .doc, .dot, .docx, .docb, .dotx, .wkb, .xlm, .xml, .xls, .xlsx, .xlt, .xltx, .xlsb, .xlw, .ppt, .pps, .pot, .ppsx, .pptx, .posx, .potx, .sldx, .pdf, .db, .sql, .cs, .ts, .js, .py.