ESET researchers have presented an investigation into the infamous Lazarus APT Group and their attack on defence contractors around the world between late 2021 and March 2022.

Lazarus APT is a notorious cybercrime organisation with an unknown number of members. From late 2021 through to March 2022, research revealed during the annual ESET World conference, showed that Lazarus has been targeting aerospace and defence contractors across the globe with the intent of cyber-espionage and exfiltration of funds, though somewhat unsuccessfully.

The attacks, and according to the ESET telemetry, show that Lazarus has been targeting companies in Europe (France, Italy, Spain, Germany, the Netherlands, Poland and Ukraine) and Latin America (Brazil).

As early as 2020, ESET researchers had already documented a campaign pursued by a sub-group of Lazarus against European aerospace and defence contractors ESET called operation In(ter)ception.

The campaign was noteworthy as it used social media, especially LinkedIn, to build trust between the attacker and an unsuspecting employee before sending them malicious components masquerading as job descriptions or applications. At that time, companies in Brazil, Czech Republic, Qatar, Turkey and Ukraine had already been targeted.

Jean-Ian Boutin, director of ESET Threat Research, explains that the threat group showed ingenuity by deploying an interesting toolset, including, for example, a user-mode component able to exploit a vulnerable Dell driver to write to kernel memory. “This advanced trick was used in an attempt to bypass security solutions monitoring,” says Jean-Ian Boutin.

ESET researchers believe the action was mostly geared toward attacking European companies, but through tracking the number of Lazarus sub-groups performing similar campaigns against defence contractors, they soon realised that the campaign extended much wider. While the types of malware used in the various campaigns were different, the initial modus operandi (MO) always remained the same: a fake recruiter contacted an employee through LinkedIn and eventually sent malicious components.

In this regard, they’ve continued with the same MO as in the past. However, ESET researchers have also documented the reuse of legitimate hiring campaign elements to add legitimacy to their fake recruiters’ campaigns. Additionally, the attackers have used services such as WhatsApp or Slack in their malicious campaigns.

In 2021, the US Department of Justice charged three IT programmers for cyberattacks as they were working for the North Korean military. According to the US government, they belonged to the North Korean military hacker unit known in the infosec community as Lazarus Group.