A new variant of crypto-mining malware is affecting QNAP's network-attached storage (NAS) devices, as per a new security advisory posted by the Taiwanese hardware firm QNAP.
The firm did not reveal how the devices were infected, but it did state that once the malware had established a grip on affected systems, it would build a process called [oom reaper] that would consume about 50% of the CPU's entire use.
QNAP stated, “This process mimics a kernel process but its PID is usually greater than 1000.”
While the infections are being examined, QNAP advised customers to protect themselves by updating their devices' operating systems (known as QTS or QuTS) and all QNAP add-on software.
Furthermore, the business advised users to change all of their NAS account passwords because it was unclear whether the attackers leveraged a vulnerability or just brute-forced an internet-connected device that used a weak password.
QNAP advised customers to reboot their devices and download and install the company's "Malware Remover" tool from the device's built-in App Center to eliminate the infection. The company's advisory provides step-by-step instructions on how to complete all three procedures above.
Malware attacks on QNAP systems in the past
However, in retrospect, the Taiwanese corporation is being utilized by malware gangs to attack its devices.
Ransomware strains such as Muhstik, Qlocker, eCh0raix, and AgeLocker have all targeted QNAP devices in recent years, with hackers obtaining access to client NAS systems, encrypting data, and then demanding minor ransom payments.
Crypto-mining malware has been uncommon, however, it has been seen in the past. QNAP NAS devices were targeted by the Dovecat crypto-mining malware in late 2020 and early 2021, which exploited weak passwords to gain access to QNAP systems.
In 2019 and 2020, the QSnatch malware targeted the company's NAS devices, infecting roughly 62,000 systems by mid-June 2020, as per CISA and the UK NCSC.
QSnatch did not have crypto-mining functionality, but it did have an SSH password stealer and exfiltration capabilities, which were the primary reasons that national cybersecurity agencies in the United States, the United Kingdom, Finland, and Germany became involved and issued national alerts about the botnet's operations.
