11/30/2023 0 Comments CcleanerAfter investigating further, it determined these versions were modified illicitly before their release to users. "The oldest malicious executable used in the Russian attack was built in 2014, which means the group behind it might have been spying for years."īased on their analysis of the ShadowPad executable from the Piriform network, Avast believes that the malicious attackers behind the malware have been active for a long time, spying on institutions and organizations so thoroughly.Piriform says it first detected a problem on September 12, when it noticed an unknown IP address receiving data from software found in recent versions of the software. "Our investigation revealed that ShadowPad had been previously used in South Korea, and in Russia, where attackers intruded a computer, observing a money transfer." Avast said. However, the company has no proofs if the third stage payload with ShadowPad was distributed to any of these targets. Moreover, it was found that the attackers were then able to install a second-stage payload on 40 selected computers operated by major international technology companies, including Google, Microsoft, Cisco, Intel, Samsung, Sony, HTC, Linksys, D-Link, Akamai and VMware. The malicious version of CCleaner had a multi-stage malware payload designed to steal data from infected computers and send it back to an attacker-controlled command-and-control server.Īlthough Avast, with the help of the FBI, was able to shut down the attackers' command-and-control server within three days of being notified of the incident, the malicious CCleaner software had already been downloaded by 2.27 million users. September 13, 2017-Researchers at Cisco Talos detected the malicious version of the software, which was being distributed through the company's official website for more than a month, and notified Avast immediately. July 18, 2017-Security company Avast acquired Piriform, the UK-based software development company behind CCleaner with more than 2 billion downloads.Īugust 2, 2017-Attackers replaced the original version of CCleaner software from its official website with their backdoored version of CCleaner, which was distributed to millions of users. NET runtime library).īetween mid-April and July-During this period, the attackers prepared the malicious version of CCleaner, and tried to infiltrate other computers in the internal network by installing a keylogger on already compromised systems to steal credentials, and logging in with administrative privileges through RDP. Supercharge Your SkillsĪpril 12, 2017-A few days later, attackers installed the 3rd stage payload on four computers in the Piriform network (as a mscoree.dll library) and a build server (as a. Learn how to secure your corporate SaaS applications and protect your data, even after a breach. Ma(5 AM local time)-Attackers first accessed an unattended workstation of one of the CCleaner developers, which was connected to Piriform network, using remote support software TeamViewer.ĭetect, Respond, Protect: ITDR and SSPM for Complete SaaS Securityĭiscover how Identity Threat Detection & Response (ITDR) identifies and mitigates threats with the help of SSPM. Vlcek shared a brief timeline of the last year's incident that came out to be the worst nightmare for the company, detailing how and when unknown hackers breached Piriform, the company that created CCleaner and was acquired by Avast in July 2017. Now, it turns out that the hackers managed to infiltrate the company's network almost five months before they first replaced the official CCleaner build with the backdoored version, revealed Avast executive VP and CTO Ondrej Vlcek at the RSA security conference in San Francisco on Tuesday.Ħ-Months Timeline of CCleaner Supply Chain Attack The malware attack infected over 2.3 million users who downloaded or updated their CCleaner app between August and September last year from the official website with the backdoored version of the software. Last year, the popular system cleanup software CCleaner suffered a massive supply-chain malware attack of all times, wherein hackers compromised the company's servers for more than a month and replaced the original version of the software with the malicious one.
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