Malware descriptions

New Trojan for Symbian-based mobile phones

There’s recently been a lot of noise about a new trojan for mobile phones (namely, the so-called Gavno trojan). According to Simworks, the new malware affects certain types of mobile devices, making it impossible to use them to make telephone calls.

Analysis of the malware sample showed that it is nothing more than a small text file pretending to be an application, packed into a standard Symbian archive (SIS). Symbian OS attempting to execute an unexecutable file is probably the reason why an infected device becomes virtually useless.

The new trojan is detected as Trojan.SymbOS.Locknut.a.

We also have samples of Worm.SymbOS.Cabir (detected as Cabir.h and .i) that include the Trojan.SymbOS.Locknut.a installation. So, there is the possiblity of Trojan.SymbOS.Locknut.a spreading in the wild via BlueTooth along with Cabir.

New Trojan for Symbian-based mobile phones

Your email address will not be published. Required fields are marked *



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.

Subscribe to our weekly e-mails

The hottest research right in your inbox