Researchers detail novel Russian Cozy Bear intrusion techniques – Security

Russian govt affiliated Cozy Bear or Innovative Persistent Threat 29 hacking team are continuing their reconnaissance activities, utilising various new stealthy intrusion tactics that allowed them keep undetected in sufferer networks, in accordance to researchers.

Protection seller Crowdstrike published a in-depth examination of the StellarParticle marketing campaign, documenting approaches these types of as browser cookie thieving to bypass multi-aspect authenticaiton (MFA) and new Home windows and Linux malware.

Cozy Bear would also perform “credential hopping” by logging into public-facing techniques via Protected Shell (SSH) distant accessibility computer software, employing a local account captured during before credential theft actions, Crowdstrike stated.

As soon as logged in by way of SSH, the hackers were being equipped to port-ahead Remote Desktop Protocol (RDP) sessions to inside servers, working with domain service account, the protection seller observed.

This enabled the hackers to produce even further RDP sessions to other internal servers, employing domain administrator accounts, and log into Workplace 365 with privileged accessibility to cloud sources, Crowdstrike stated.

Credential hopping and working with Chrome browser cookie theft to bypass MFA that shields cloud assets are both of those challenging to detect as the hackers used strict operational security to hide their things to do, but Crowdstrike was nevertheless ready to capture some artifacts still left by the menace actors.

A new piece of malware, the lower prevalence TrailBlazer for Windows that masquerades regulate and command targeted traffic as reputable Google Notifications HTTP requests was also observed by Crowdstrike.

Crowdstrike also learned a Linux variant of the Home windows GoldMax backdoor that was deployed in mid-2019.

Other intrusion and qualifications theft tactics used in the StellarParticle marketing campaign confirmed the attackers higher amount of sophistication and knowledge that served them avoid detection for several years.

“The StellarParticle marketing campaign, linked with the COZY BEAR adversary team, demonstrates this danger actor’s in depth information of Windows and Linux functioning techniques, Microsoft Azure, O365, and Active Listing, and their patience and covert ability set to stay undetected for months — and in some instances, many years,” Crowdstrike scientists claimed.

Cozy Bear’s aim with the StellarParticle campaign look to be gathering delicate info about services and products delivered by victim organisations, Crowdstrike mentioned.

This integrated the hackers viewing internal enterprise functions paperwork, and inner information repositories these types of as Wikis.

The StellarParticle campaign is ongoing, Crowdstrike stated, and associated to the Sunspot implant observed in the well-publicised SolarWinds supply-chain hack, in December 2020.

Security industry experts and the United States govt have tied the Cozy Bear hacking assaults to Russia’s International Intelligence Provider.

Maria J. Danford

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