Incidents

2+2=89?

This week we added another unusual detection – detection for a calculator virus.

Virus.TI.Tigraa.a is a memory resident virus, and in the best tradition of DOS viruses, it’s a mere 492 bytes in size. It works on Texas Instruments TI-89 graphing calculators (the TI-89, TI-89 Titanium, and the Voyage 200 which will run most programs for the TI-89) with the Motorola 68000 processor. The virus is designed to clear the screen and then display a message saying ‘t89.GAARA’.

Of course, Tigraa.a is classic proof of concept code. It’ll only work on individual calculators, and can’t spread. But nevertheless, it’s created another entry in the roll call of potentially infectable devices.

2+2=89?

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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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