Attacks in this sector are up from 55 in 2018 to more than 80 so far this year, according to Recorded Future.
Three hospitals in Alabama turned away patients earlier this month after ransomware seized their systems. Leaders of the response paid an undisclosed ransom. An August ransomware attack at Wood Ranch Medical, a California-based provider, locked patient medical records and forced the practice to permanently close.
A ransomware attack at a massive aluminum producer this year generated staggering losses, estimated at $58 to $70 million. This was recently eclipsed by a September attack on a major manufacturer of hearing aids with estimated losses of $90 to $95 million. Arizona Beverages, one of the largest beverage suppliers in the U.S., was also hit this year, with more than 200 servers and computers infected. Staff had to rebuild the network from scratch at a massive cost.
Falcon Transport, an Ohio-based trucking company, said its permanent closure in April partly caused by a ransomware attack earlier this the year. Duie Pyle, a large Pennsylvania-based trucking company, was also hit by ransomware in June.
Tactics Used in Attacks
The FBI is receiving reports of the following tactics being used in these attacks.
Attackers previously spammed the masses with email, hoping to land a few fish. Today’s attacks are more targeted, using messages more closely tailored to the victim’s context – such as their job or industry.
Remote Desktop Protocol
Attackers use brute-force and purchased credentials to gain remote access to the victim’s system. Once breached, installing ransomware on the system is trivial.
The FBI alert cites a recent attack exploiting flaws in the remote management tools used by managed service providers. The clients of at least three MSPs had ransomware installed on their systems once attackers controlled the RMM tools.
Reports surfaced this week of a ransomware strain that exploits an iTunes vulnerability (Windows version). The flaw allows attackers to evade detection by antivirus software, according to PC Magazine.
Ransomware Protection & Prevention
Recommended practices from the FBI and elsewhere to prevent a ransomware disaster:
“The most important defense for any organization against ransomware is a robust system of backups,” according to the FBI alert.
That said, backups can help only if they are configured correctly. Test them periodically, and always keep a set offline.
Plan for disaster
No company can guarantee they will remain clean of ransomware – so plan for disaster before it strikes. Make contingency and remediation plans. Test the plans periodically.
Email phishing is the most common means of malware infection. This is partly due to the reliable incompetence of users. Raise your uses’ competence. Train them on safe email practices.
Always patch operating systems, firmware, and software – especially antivirus software. Ensure end-points are patched as soon as vulnerabilities are exposed. Automate patching when possible.
Follow the principle of least-privilege to limit access to privileged accounts. Users should be granted access to the only systems and resources they need to perform their duties. Administrator accounts should only be used to perform certain tasks. Standard user accounts should be used at all other times.
Close unused RDP ports and use two-factor authentication where possible. Here are more RDP security tips.
Use software restriction policies or other controls to prevent programs from executing in directories favored by ransomware, such as the AppData/LocalAppData folder.
Restrict Allowed Apps
Configure an application whitelisting solution to allow only approved software to run on workstations and servers. If ransomware reaches a machine, this can prevent it from running.
Categorize the data in your organization by value and use physical and logical separation to keep them apart. For example, customer data should not reside on the same server or network segment as a company’s email environment.