Malware descriptions

First SMS Trojan for Android

I think the title of this post speaks for itself. Trojan-SMS.AndroidOS.FakePlayer.a passes itself off as a media player application. If the user chooses to install it, this icon with the name “Movie Player” will appear in the list of applications:

The malware sends SMS messages to two premium rate numbers 3353 and 3354, with each message costing approximately $5. It does this stealthily, without requiring any confirmation from the device owner.

During installation, the user is asked to allow this application to change or delete memory card data, send SMS and read the data about the phone and phone ID. This is a huge red flag – why does a simple media player require permission to send SMS messages? – and anyone who’s paying attention during the installation process will immediately be suspicious.

This flags up an important point: when installing a new program, you really should pay attention to which services the application requests access to. Automatically permitting a new application to access every service it requests means you could end up with malicious or unwanted applications doing all sorts of things without requesting any additional confirmation. And you won’t know anything about it.

Trojan-SMS.AndroidOS.FakePlayer.a is quite a development – yet another popular mobile platform, and one with an ever increasing market share is now being targeted by the bad guys. At the moment, although anyone’s device can be infected, the Trojan only causes losses for Russian users, and as far as we can tell, it’s currently not being spread via Android Marketplace.

In the past, though, we’ve seen plenty of local problems evolve to become global ones. And when we get malware that uses a new infection vector or targets a previously untouched platform, we know that sooner or later, there will be more on the way.

First SMS Trojan for Android

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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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