For example, Adobe Reader is 32 bit only software. 32 bit software runs fine on 64 bit systems. In reality, most users are clueless if a 32 or 64 bit software is installed. On the whole, they very well may be, but incidents like this demonstrate that no one, not even a security vendor, can afford to take the topic lightly. The CCleaner installer includes both 32 and 64 bit versions. For better or worse, we tend to view such companies as intrinsically better at self-security than other firms. A security product is the last place people expect to find a compromised software version, both because of the nature of the program and the fact that a security vendor is responsible for writing and maintaining it. Without more to go on, it’s impossible to assign blame for the incident, but the hackers probably made off pretty well. We want to thank the Avast Threat Labs for their help and assistance with this analysis.” The company describes the malware as a “two-stage backdoor capable of running code received from a remote IP address on affected systems.” Piriform notes that as of this writing, “we don’t want to speculate how the unauthorized code appeared in the CCleaner software, where the attack originated from, how long it was being prepared and who stood behind it. ”ĬCleaner is owned by Avast, the antivirus company, and has already issued a public apology and statement on the incident. Ideally this certificate should be revoked and untrusted moving forward. ![]() ![]() Troublingly, the malware was digitally signed with an appropriate digital certificate Talos wrote, “the presence of a valid digital signature on the malicious CCleaner binary may be indicative of a larger issue that resulted in portions of the development or signing process being compromised. From August 15 to September 12, the 5.33 version of CCleaner was infected by a malware payload. Nini7us, redfox7, psyko666 and 42 others 21 24 Share More sharing options. Note: Security Notification for CCleaner v and CCleaner Cloud v for 32-bit Windows users. CCleaner is a popular utility, with an average of five million downloads per week (over two billion downloads cumulatively). CCleaner (Crap Cleaner) is a freeware system optimization. Talos Intelligence has published a blog post detailing its research and findings, and they aren’t great. CCleaner Cloud users should have gotten an update already, but if you use CCleaner and don’t have automatic updates enabled, it would be a good idea to check the situation now. The infected payload affects two CCleaner products - CCleaner v and CCleaner Cloud v. September 12 - Morphisec notifies Avast and Cisco of the suspicious CCleaner activity. September 11 - Morphisec customers share detection logs detailing CCleaner-related malicious activity with the companys engineers. In other words, to the best of our knowledge, we were able to disarm the threat before it was able to do any harm. Worse, the company distributed infected versions of its products for nearly a month before realizing the problem. August 24 - Piriform releases CCleaner Cloud v that also includes the Floxif trojan. Users of CCleaner Cloud version have received an automatic update. CCleaner, the temporary file cleaner and registry optimizer of generally dubious utility in this day and age, has been flagged as containing malware.
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