The world of cybersecurity has been facing constant threats from advanced persistent threats (APTs) for years, with Winter Vivern and Nobelium being considered as two of the most dangerous ones. These APTs have been orchestrating cyberattacks against a range of global organizations, including government officials and non-governmental organizations (NGOs). This article will delve into the characteristics, methods, and targets of these two APTs.
Since 2021, Winter Vivern has been linked to campaigns targeting government officials in various countries. Reports suggest that this advanced persistent threat group has been involved in attacks aimed at government institutions in India, Lithuania, Slovakia, and the Vatican. The group’s targeted activity has been primarily focused on government agencies and individuals within various governments, although its ultimate aim remains unknown. Analysts believe that Winter Vivern’s interests align with those of Russia and Belarus.
Methods Used by Winter Viverne
Winter Vivern employs a wide variety of customized methods to distribute its payloads and gain unauthorized access to sensitive systems. In mid-2022, the group established credential phishing web pages to deceive users of India’s government-authorized email service, email.gov[.]in. These deceptive web pages were designed to look like legitimate portals, making it difficult for users to detect the infiltration.
Winter Vivern employs a typical attack chain that involves the use of batch scripts disguised as virus scanners to trigger the deployment of the Aperetif trojan. The trojan is a type of backdoor malware that creates communication channels with a command-and-control infrastructure, thereby enabling attackers to execute further operations within the infiltrated system. The malware has been modified to evade detection by various detection systems, thereby making it even more challenging to detect.
Nobelium: Yet Another Phishing Campaign Targeting Diplomatic Entities
Nobelium is associated with APT29 and has been continuously improving its toolset, creating new customized malware like MagicWeb and GraphicalNeutrino. Recently, Nobelium has been connected to phishing campaigns targeting diplomatic bodies in the European Union, focusing on agencies that aid Ukrainian citizens seeking refuge and supporting the Ukrainian government.
The phishing emails in these campaigns carry weaponized documents that contain a link to an HTML file. Once downloaded and opened, the file downloads custom-built malware, increasing the likelihood of successful infiltration. Nobelium continually updates its toolset to avoid detection, making it incredibly challenging to detect and defeat.
The Targets of Nobelium’s Broad Scope
Nobelium has executed multiple parallel campaigns targeting organizations such as government agencies, NGOs, IGOs, and think tanks across the US, Europe, and Central Asia. The group remains highly active and continuously evolves its tactics and methods, making it challenging to detect its activities. Its campaigns focus on political, economic, and defense sectors in various countries, including the US, Central Asia, and Europe, including Russia.
Based on reports and the group’s capabilities, Nobelium is widely regarded as an exceptionally threatening APT, requiring continuous monitoring of its activities.
As cyber attacks continue to increase worldwide, organizations must take necessary steps to safeguard their systems against APTs such as Nobelium and Winter Vivern. These two APTs pose significant threats to cybersecurity globally, and they continue to wreak havoc across multiple global organizations. To prevent these attacks, organizations should ensure that their systems are protected with the latest security patches, and their employees must receive regular cybersecurity training. Additionally, incident-response plans must be in place, and organizations should be vigilant of any strange activities within their networks. By taking these necessary measures, organizations can reduce the risk of falling prey to APTs such as Winter Vivern and Nobelium, ensuring business continuity and data protection.
