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The CCleaner malware shares code with tools used by Axiom, and a time stamp on a compromised server matched a Chinese time zone however, time stamps can be changed or modified, making it difficult to pinpoint origin.Ĭombined with the choice of tech targets, this raised concerns that CCleaner malware could be part of a state-sponsored attack. The server contained a database of every backdoored computer that had 'phoned home' to the hackers' machine between September 12 and 16".Īlthough there is no definitive evidence identifying the party responsible for the CCleaner malware, investigators discovered a link to a Chinese hacking group known as Axiom. This payload targeted approximately 20 of the largest tech companies, including Google, Microsoft, Cisco, and Intel, and infected 40 computers.Īccording to Wired, "Cisco says it obtained a digital copy of the hackers' command-and-control server from an unnamed source involved in the CCleaner investigation.
A second stage payload was discovered by Cisco Talos. Unfortunately, the company soon discovered the malware infection was more severe than originally believed. It's believed more than 2 million users were infected.
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Initially, the company believed it was confined to the above versions running on a 32-bit Windows systems and that downloading upgraded versions of the program would solve the problem. It's believed the hackers compromised CCleaner's build environment to insert the malware.Īccording to different reports, the malware is capable of collecting specific data from an infected computer system, including IP addresses and information on installed and active software, and sending it to a third-party server located in the United States.ĬCleaner's parent company, Avast Piriform, found the malware on September 12, 2017, and immediately took steps to remediate the problem.
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The malware consisted of two Trojans, Trojan.Floxif and Trojan.Nyetya, inserted into the free versions of CCleaner version and CCleaner Cloud version. They turned a tool meant to scrub your computer clean of lurking malware into a serious threat to sensitive and personal information. Hackers took the legitimate program and inserted malicious code that was designed to steal data from users. However, in September 2017, CCleaner malware was discovered. In January 2017, CNET gave the program a "Very Good" rating. During the cleanup, malicious files buried in the system are also deleted.
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The software gets rid of temporary files that eat up disk space and invalid Windows registry keys. It launched an investigation with Czech intelligence officials and police that included quietly monitoring the attacker’s activity rather than immediately evicting it from the network.CCleaner is a utility program designed to delete unwanted files from a computer. The hacker or hackers had been trying to get into Avast’s network since May, but the company did not notice something was amiss until Sept. The more recent attack on CCleaner was also persistent.
The goal of the operation, which analysts believe was the work of a Chinese state-sponsored group, was reportedly to steal intellectual property from CCleaner customers. In the 2017 hack, the attackers signed their malware with a legitimate Avast certificate, a technique that is the hallmark of a clever supply-chain breach. The 2017 breach of CCleaner is often cited by security experts to illustrate the threat of wide-ranging supply-chain hacks. “We do not know if this was the same actor as before and it is likely we will never know for sure,” she wrote. “t is clear that this was an extremely sophisticated attempt against us that had the intention to leave no traces of the intruder or their purpose,” Baloo wrote in a blog post. Avast, which boasts of 400 million users of its products around the world, said it will study its network logs to learn more about the intrusion. Those measures, Avast CISO Jaya Baloo assured customers, were enough to ensure that CCleaner users were unaffected by the attack.
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Worried that the attackers would manipulate CCleaner again, Avast said it halted an upcoming release of the product, revoked its previous security certificate, and put out a security update to users. The target of the persistent attack was likely Avast’s software-cleaning tool, CCleaner - the same product that was infiltrated in an infamous 2017 supply-chain attack breach that affected over 2 million computers. An unidentified attacker used stolen credentials to gain high-level privileges on the network of Czech software security vendor Avast, the company said Monday.