Malware descriptions

Update on new worm

We have now analysed the new worm (see below) further. It’s actually a new variant of Atak – Email-Worm.Win32.Atak.h. Some variants of this family are similar to some of the Mydoom worms.

Atak.h copies itself to the Windows system directory as dec25.exe

It writes itself to win.ini to ensure that a copy of the worm is launched each time the victim machine is started.

[windows] run=file path dec25.exe

A full description will be available soon.

Update on new worm

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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.

Lazarus targets defense industry with ThreatNeedle

In mid-2020, we realized that Lazarus was launching attacks on the defense industry using the ThreatNeedle cluster, an advanced malware cluster of Manuscrypt (a.k.a. NukeSped). While investigating this activity, we were able to observe the complete life cycle of an attack, uncovering more technical details and links to the group’s other campaigns.

Sunburst backdoor – code overlaps with Kazuar

While looking at the Sunburst backdoor, we discovered several features that overlap with a previously identified backdoor known as Kazuar. Our observations shows that Kazuar was used together with Turla tools during multiple breaches in past years.

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