![ccleaner malware called ccleaner malware called](https://blog.avast.com/hs-fs/hubfs/avast-blog/Threat%20Labs%209-21-17/Image%202%20Stage%202.png)
It is unclear whether this has happened, and there is no evidence to suggest that it did.
CCLEANER MALWARE CALLED INSTALL
However, should the attackers have used the backdoor as a foothold to install more persistent malware on an infected machine, this malware would likely still be active. The takedown of the C&C servers and the takeover of the relevant domains means that the original malware itself has now been neutralized.
![ccleaner malware called ccleaner malware called](https://27jts3o00yy49vo2y30wem91-wpengine.netdna-ssl.com/wp-content/uploads/2019/05/CCleaner-Floxif-768x243.png)
In a blog post, the Cisco researchers provide a good overview of the malware and its C&C communication to a hard-coded IP address, with a Domain Generation Algorithm (DGA) as a backup communication channel.
![ccleaner malware called ccleaner malware called](https://s.hdnux.com/photos/46/66/73/10186433/5/1200x0.jpg)
Researchers from Cisco Talos found a version of the product that came with a malicious payload added to it, which installed a backdoor on targeted systems. For the security community, 2017 might well be called the year of the update: two of the biggest security stories – the WannaCry outbreak and the Equifax breach – involved organizations being hit badly as a consequence of not having installed (security) updates, while another major story, that of (Not)Petya, concerned a threat that spread through a compromised update system used by the Ukrainian tax software MEDoc.Ī new story can now be added to the latter category: that of CCleaner, a legitimate tool widely used for cleaning up Windows and OS X computers.