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CCLEANER MALWARE CHECK INSTALL
CCLEANER MALWARE CHECK UPDATE
CCLEANER MALWARE CHECK UPGRADE

CCLEANER MALWARE CHECK INSTALL

In support documentation, Microsoft noted that PUAs are not categorized as viruses, malware or other types of threats, but such as apps could “adversely affect endpoint performance or use” and offer to install other apps that qualify as PUA.

The MS-ISAC asks that you share this Cyber Alert with other potentially affected entities as CCleaner is commonly used software.According to user reports, Windows Defender flags CCleaner as a Potentially Unwanted Program with alert level low, but the CCleaner is not detected as a threat to the system and users can still manually allow the app to run on their systems.

Apply the principle of Least Privilege to all systems and services.

Review your systems for copies of the compromised files.

Review network logs for DNS requests from your organization to the listed domains.

If you downloaded either the 32-bit or 64-bit versions, run antivirus and antimalware programs with automatic updates of signatures to quarantine the infected file.

CCLEANER MALWARE CHECK UPDATE

If you have installed the Cloud version, verify the auto update feature downloaded and installed a clean version.

CCLEANER MALWARE CHECK UPGRADE

SLTT government entities should determine if they are running the 32-bit version of CCleaner and if so, check if version 5.33 of the software is currently running on their systems and immediately upgrade to the latest CCleaner version, after appropriate testing.DGA Domains associated with the compromised update:.IP address associated with the compromised update: MD5 hash associated with the compromised update: Indicators of Compromiseįile associated with the compromised update: Piriform warns that they need to finish the incident response process to address any concerns related to the use of its digital certificate. Currently, VirusTotal shows that 40 of 64 detection engines detect the malware. This information can then be used to tailor specific malware for the machine.

If the user updated to the 32-bit version of CCleaner, they then executed the infected file, installing the malware.įloxif is a reconnaissance stage malware, with the payload designed to setup communication to a C2 server in order to exfiltrate non-sensitive data (computer name, IP address, list of installed software, list of active software, list of network adapters).

Any user updating CCleaner to the infected versions would have downloaded the infected file. The malware was packaged with the CCleaner update in the installation executable, which was signed using a valid digital signature issued to Piriform by Symantec. Users also can clean temporary files, and analyze their system to determine ways to optimize performance. law enforcement and shut down the command and control (C2) server on September 15.ĬCleaner allows users to manage applications and perform routine maintenance on their systems. Updated versions, released on September 12 remediated the issue. (Piriform is owned by Avast.) The August 15 release of CCleaner version and the August 24 update of CCleaner Cloud version were compromised with Floxif malware. The Multi-State Information Sharing and Analysis Center (MS-ISAC) is aware of a supply chain compromise affecting at least two versions of Piriform’s CCleaner software.