In September of that year, Digital Sky Technologies changed its name to Mail. Since the acquisition, has invested in turning ICQ from a desktop client to a mobile messaging system.
Attackers use the full control the backdoor grants them over the device to subscribe the user to premium SMS numbers that benefit a local company.
Trend Micro says it discovered more than 1,200 malicious apps that carry ZNIU available via various online websites.
Dirty COW is a privilege escalation vulnerability in the Linux kernel that came to light last year, in October 2016.
The vulnerability allows an attacker to elevate the privilege of attack code to "root" level and carry out malicious operations.
The Dirty COW bug existed in the Linux kernel code for nine years, since 2007.
At the time of its discovery, Dirty COW was a zero-day and researchers said attackers used it against Linux servers. A few days later after its discovery, researchers found that Dirty COW could be used to root Android devices.Most of the infected apps were gaming and pornography related.The company says it detected about 5,000 users infected with the ZNIU malware, but the number could be bigger as the company had visibility only inside devices protected by its mobile security solution.Issued UINs started at '10,000' (5 digits) and every user receives a UIN when first registering with ICQ.As of ICQ6 users are also able to log in using the specific e-mail address they associated with their UIN during the initial registration process.As such UINs that are stolen can sometimes be reclaimed.