Also known as: tracked as
APT-C-13 (Sandworm), also known as FROZENBARENTS, is a state-sponsored advanced persistent threat group conducting global cyber espionage operations. The organization recently deployed malicious campaigns using nested SSH and TOR tunnel infrastructure to establish covert remote access channels. Attackers distribute ZIP archives containing weaponized LNK files via spearphishing emails, which extract and execute payloads that create scheduled tasks disguised as legitimate software. The attack establishes dual-encrypted anonymous tunnels using obfs4 protocol to bypass deep packet inspection, while mapping sensitive ports (SMB/445, RDP/3389) to Onion domains for persistent backdoor access. The campaign leverages sophisticated anti-analysis techniques including sandbox detection, file disguise, and process masquerading to evade detection and maintain long-term unauthorized control over compromised systems for intelligence collection.
Targeted Sectors
Executive Summary
APT-C-13, also known as Sandworm and FROZENBARENTS, is a state-sponsored advanced persistent threat group engaged in global cyber espionage operations, targeting government, defense, and energy sectors. The group utilizes sophisticated tactics, including nested SSH and TOR tunnel infrastructure, to establish covert remote access channels. Their operations often involve spearphishing emails with malicious ZIP archives containing weaponized LNK files to gain unauthorized access to sensitive systems.
Goals & Targeting
APT-C-13's strategic objectives are centered around gathering sensitive information from targeted sectors, including government, defense, and energy. The group's targeting profile suggests a focus on strategic intelligence gathering, with the goal of supporting national interests and potentially disrupting critical infrastructure. The group's typical victims are organizations within the targeted sectors, including government agencies, defense contractors, and energy companies. The attackers often target high-value assets, such as sensitive data and intellectual property, to support their intelligence gathering objectives.
Enhanced Description
The threat posed by APT-C-13 is significant, as the group's operations have the potential to compromise sensitive information and disrupt critical infrastructure. The group's targeting of government, defense, and energy sectors suggests a focus on gathering strategic intelligence and potentially disrupting national security. The use of sophisticated TTPs and anti-analysis techniques makes APT-C-13 a formidable opponent, requiring a high level of vigilance and proactive defense from targeted organizations.
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Campaigns & Victims
APT-C-13's campaign patterns suggest a high level of sophistication and a deep understanding of the targeted systems and networks. The group's operational tempo is characterized by a focus on strategic intelligence gathering, with a emphasis on long-term unauthorized access to sensitive systems. The attackers often leverage advanced anti-analysis techniques and dual-encrypted anonymous tunnels to maintain persistence and evade detection. Notable past operations have involved the targeting of government, defense, and energy sectors, with a focus on disrupting critical infrastructure and gathering strategic intelligence.
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Confidence Assessment
The confidence level in the available data is moderate to high, based on the analysis of publicly available threat intelligence and technical indicators. However, there are some information gaps, including the lack of specific details on the group's organizational structure and motivations. Additional research and analysis are needed to further refine the understanding of APT-C-13's TTPs and to identify potential weaknesses in their operations.
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