Incidents

Koobface on the tweet

We are currently witnessing a new wave of Koobface messages flooding twitter. The message that is mostly used right now is: “My home video 🙂 <URL>”

The link in infected tweets points to a site with a little javascript.

The script calls a php-script on a server which uses an ID to return an IP address leading to the video site. This means the IP address is different for every request.

Interestingly, the guys behind this attack are clearly out to maximize their ROI: if you’re using Mac or Linux, you end up getting redirected to an adult site.

Twitter is saying it may block infected accounts. We’re doing our part as well – our users are already protected from the malicious file:

And we’ve also added protection against the malicious tweet itself, which will be detected as Net-Worm.Win32.Koobface.aqy as updates are rolled out to our users.

Koobface on the tweet

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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.

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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