Incidents

Classical viruses ITW – never say die

Over 2 years have gone by since we’ve seen a true virus in the wild. Since the meaning of a “true” virus may be simply forgotten in today’s flux of Internet worms, by “true virus” we mean the good old file infectors, also called parasitic viruses which attach themselves to executable files on your disk. Yes, like CIH or Funlove for example. And yet…

On July 13 we received the first sample of Tenga – a true blue virus. We were surprised, but we let it it go. Tenga.a was followed by Tenga.b and finally Tenga.c, which arrived just yesterday. Tenga is a classic appending virus, but it has borrowed features from more modern malware: it can spread like a worm given the opportunity and also has a downloader function.

But modern features aside, Tenga is a good old classic virus, where the main goal is to self-replicate as much as possible. Once your machine is infected, you can end up with hundreds of infected files, all of which will then attempt to download Trojan-Downloader.Win32.Small.bdc.

It now remains to be seen whether this is a fluke or whether more virus writers will return to true viruses.

Classical viruses ITW – never say die

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Reports

Operation TunnelSnake

A newly discovered rootkit that we dub ‘Moriya’ is used by an unknown actor to deploy passive backdoors on public facing servers, facilitating the creation of a covert C&C communication channel through which they can be silently controlled. The victims are located in Africa, South and South-East Asia.

APT trends report Q1 2021

This report highlights significant events related to advanced persistent threat (APT) activity observed in Q1 2021. The summaries are based on our threat intelligence research and provide a representative snapshot of what we have published and discussed in greater detail in our private APT reports.

The leap of a Cycldek-related threat actor

The investigation described in this article started with one such file which caught our attention due to the various improvements it brought to this well-known infection vector.

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