More about SpamTools: you can run but you can’t hide …

My earlier post about SpamTools led to a lot of questions. For instance, some people were concerned that if spammers exclude anti-virus and anti-spam vendors from mass mailings, then these vendors will be unable to stop new spam.

The truth is that no antivirus vendor depends on corporate-based email addresses for collecting information. There is a number of other tools and methods for collecting samples, many of which are proprietary.

So, why would spammers exclude security vendors from mass mailings? All we can say for sure about spammers harvesting email addresses selectively is that they are targeting their campaigns more carefully.

On the one hand, there is no real reason to exclude security vendors from general advertising mailing lists. On the other hand, spammers may think that excluding security vendors from phishing attacks might increase the window of opportunity.

From our point of view, it really doesn’t make a difference. We will continue monitoring spammers no matter where and how they hide.

More about SpamTools: you can run but you can’t hide …

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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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