APT reports

The TeamSpy Crew Attacks – Abusing TeamViewer for Cyberespionage

Earlier today, the Laboratory of Cryptography and System Security (CrySyS Lab), together with the Hungarian National Security Authority (NFB), published details on a high profile targeted attack against Hungary. The details about the exact targets are not known and the incident remains classified.

Considering the implications of such an attack, Kaspersky Labs Global Research & Analysis Team performed a technical analysis of the campaign and related malware samples.

You can read our short FAQ below and you can download our technical analysis paper linked at the end of the blogpost.

What is it?

‘TeamSpy’ is a cyber-surveillance operation targeting high level political and human rights activists throughout CIS and Eastern European nations. Victims also include government agencies as well as private companies. The attacks have been ongoing for almost a decade and were previously mentioned by Belarussian activists in 2012.

Why call it TeamSpy?

The attackers control the victims computers remotely by using the legal remote administration tool TeamViewer. This application is signed with legitimate digital certificates and is used by more than 100 million users around the world. To avoid alerting the user that somebody is spying on him, the attackers dynamically patch TeamViewer in memory to remove all signs of its presence.

What does the malware do?

This is a surveillance/reconnaissance and data-theft operation. Sensitive stolen data includes:

– Secret content, secret/private crypto keys, passwords.
– Apple iOS device history data from iTunes.
– Detailed OS and BIOS information.
– Keylogging and screenshot captures.

What exactly is being stolen?

The attackers are interested in office documents and files (e.g., *.doc, *.rtf, *.xls, *.mdb), pdf files (*.pdf), disk images (e.g., *.tc, *.vmdk), as well as files that potentially contain sensitive information such as encryption keys (e.g.,*. pgp, *.p12) and passwords (e.g., *pass*, *secret*, *saidumlo*, *секрет*.* and *парол*.*).

What is saidumlo?

Secret, in Georgian. секрет means secret in Russian, while парол means password.

How can organizations protect themselves against this particular attack?

1. Scan for the presence of the teamviewer.exe application.
2. Block access to the known command-and-control domains and IP addresses. (see our full technical paper)
3. Implement a rigid patch-management plan throughout the organization. This operation includes the use of popular exploit kits that targets known desktop software security vulnerabilities.

For more details, read our analysis of the TeamSpy attacks.

The TeamSpy Crew Attacks – Abusing TeamViewer for Cyberespionage

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



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.

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.

Subscribe to our weekly e-mails

The hottest research right in your inbox