Malware descriptions

Your money or your system registry

We’re starting to see a growth in the number of malicious programs which are being used to get money out of users – a type of cyber extortion.

Examples of this type of malicious program are Virus.Win32.GPCode, and Trojan.Win32.Krotten. Today we detected the latest modification of Krotten, Trojan.Win32.Krotten.n.

Trojan.Win32.Krotten uses exactly the same approach as GPCode. It corrupts data on the victim machine, and also displays a message saying that the data will be unencrypted once payment is received by the user/ author of the malicious program. Krotten differs from GPCode in that GPCode encrypted data saved to disk. Krotten corrupts the system registry. The author of Krotten offers to restore the corrupted data in return for a sum equivalent to approximately $5.

Message displayed on reboot.

The Russian text states that within 12 hours following receipt of payment (to be sent to an email address given in the message) the user will receive a file which will delete the malicious program. The message, which mentions an account in Kiev, and specifies an amount in hryvnia, points to the Ukrainian origin of Krotten.

Detection for Trojan.Win32.Krotten.n has of course been added to our antivirus databases.

Once again, this is yet another case which shows that you should never open an unexpected attachment. And users should never send money to virus writers or those who are using them in cyber scams. This just encourages them to create a new version of whatever virus they are using, and launch another attack.

Your money or your system registry

Your email address will not be published.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

 

Reports

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.

Lazarus covets COVID-19-related intelligence

As the COVID-19 crisis grinds on, some threat actors are trying to speed up vaccine development by any means available. We have found evidence that the Lazarus group is going after intelligence that could help these efforts by attacking entities related to COVID-19 research.

Sunburst: connecting the dots in the DNS requests

We matched private and public DNS data for the SUNBURST-malware root C2 domain with the CNAME records, to identify who was targeted for further exploitation. In total, we analyzed 1722 DNS records, leading to 1026 unique target name parts and 964 unique UIDs.

What did DeathStalker hide between two ferns?

While tracking DeathStalker’s Powersing-based activities in May 2020, we detected a previously unknown implant that leveraged DNS over HTTPS as a C2 channel, as well as parts of its delivery chain. We named this new malware “PowerPepper”.

Subscribe to our weekly e-mails

The hottest research right in your inbox