Threats Tagged 't1562'

Since late 2025, cybercriminals have been exploiting Wallpaper Engine, a popular live wallpaper application on Steam, to distribute malware through Steam Workshop. Attackers target primarily Chinese and Russian gamers by embedding malicious code within application wallpapers shared on the platform. These compromised wallpapers deliver various malware types including infostealers, backdoors, crypto miners, and ransomware. One analyzed sample dropped DarkKomet backdoor while hijacking Steam sessions to steal account credentials. The malware modifies system libraries to locate Steam installations and exfiltrate data to attacker-controlled servers. Compromised accounts are then used to upload additional malicious wallpapers. The diverse malware families suggest multiple independent hacking groups are exploiting this distribution method. Infected wallpapers received thousands of downloads before removal, with 89% of infections occurring in China.

MediumMalwareBritish Indian Ocean TerritoryCanadaChina+5#account hijacking#vidar#wallpaper engine

An FBI investigation identified Denis Nikolayevich Obrezko, a Russian national, as facilitating cyber intrusions conducted by the Russia-aligned threat group Void Blizzard. Between June and July 2024, multiple U.S. companies across various sectors were targeted in a large-scale cyber espionage campaign involving mass email harvesting and unauthorized access. The threat actors utilized stolen session tokens, proxy services, and VPNs to authenticate to victim Office 365 environments and exfiltrate data. Obrezko allegedly obtained critical infrastructure including a virtual private server and domain registration used in these attacks. FBI investigation linked Obrezko through cryptocurrency transactions, email accounts, phone numbers, and IP addresses to domains and infrastructure used in the intrusion campaign. Eleven U.S. companies have confirmed unauthorized access, representing only a fraction of suspected victims nationwide.

MediumCampaignUnited States#void blizzard#cryptocurrency#denis obrezko