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We continue to see an increase in sophisticated and nation-state-sponsored attacks and, as part of our ongoing threat research and efforts to protect customers, we will continue to provide guidance to the security community on how to secure against and respond to these multi-dimensional attacks. Due to the fast-moving nature of this campaign and its perceived scope, Microsoft encourages organizations to investigate and monitor communications matching characteristics described in this report andВ take the actions described below in this article. Microsoft Defender for Office 365 detects the malicious emails, and Microsoft Defender for EndpointВ detects the malware and malicious behaviors. Microsoft 365 Defender delivers coordinated defense against this threat. However, some automated threat detection systems may have successfully delivered some of the earlier emails to recipients either due to configuration and policy settings or prior to detections being in place. Due to the high volume of emails distributed in this campaign, automated email threat detection systems blocked most of the malicious emails and marked them as spam. This new wide-scale email campaign leverages the legitimate service Constant Contact to send malicious links that were obscured behind the mailing serviceвЂ™s URL (many email and document services provide a mechanism to simplify the sharing of files, providing insights into who and when links are clicked). With this latest attack, NOBELIUM attempted to target approximately 3,000 individual accounts across more than 150 organizations, employing an established pattern of using unique infrastructure and tooling for each target, increasing their ability to remain undetected for a longer period of time. NOBELIUM has historically targeted government organizations, non-government organizations (NGOs), think tanks, military, IT service providers, health technology and research, and telecommunications providers.

#Initial d iso file update

Update : We published a new blog post detailing NOBELIUMвЂ™s latest early-stage toolset, composed of four tools utilized in a unique infection chain: EnvyScout, BoomBox, NativeZone, and VaporRage. We will post more details here as they become available. You can also find more information on the Microsoft On The Issues blog. Below, we have outlined attacker motives, malicious behavior, and best practices to protect against this attack. Microsoft is issuing this alert and new security research regarding this sophisticated email-based campaign that NOBELIUM has been operating to help the industry understand and protect from this latest activity. On May 25, 2021, the campaign escalated as NOBELIUM leveraged the legitimate mass-mailing service, Constant Contact, to masquerade as a US-based development organization and distribute malicious URLs to a wide variety of organizations and industry verticals.

#Initial d iso file series

The campaign, initially observed and tracked by Microsoft since January 2021, evolved over a series of waves demonstrating significant experimentation. Microsoft Threat Intelligence Center (MSTIC) has uncovered a wide-scale malicious email campaign operated by NOBELIUM, the threat actor behind the attacks against SolarWinds, the SUNBURST backdoor, TEARDROP malware, GoldMax malware, and other related components.

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