Incidents

New Net-Worm.Win32.DipNet.d

Internet Storm Center has been registering high traffic on port 11768 since the end of December. The appropriate graph is available at http://isc.sans.org/port_details.php?port=11768.

There also have been numerous reports from internet systems administrators on getting frequently repeated network packets with source port 445 and destination port 11768 stated. The latter makes the traffic look like activity of a Net-Worm opening a backdoor on 11768 and spreading via 445.

We’ve recently got a virus that opens a backdoor on 11768 and spreads via 445. The virus is a modification of Net-Worm.Win32.DipNet (Net-Worm.Win32.DipNet.d). Howewer, it seems that the previous modifications of the virus didn’t listen on port 11768.

An antivirus database update is already available. A detailed description of the virus will be available in the Virus Encyclopedia in the near future.

New Net-Worm.Win32.DipNet.d

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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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