Unrelenting Data Thieves: Continuous, Unyielding Activities
Infostealers Remain a Persistent Threat in 2025-2026
Infostealers, a type of malware that steals sensitive data such as login credentials, personal financial information, and cryptocurrency wallets, continue to pose a significant threat to individuals and organizations in 2025 and 2026.
Many of the largest data breaches in 2024 can be traced back to compromised legitimate credentials stolen via infostealers. This trend is expected to continue, with infostealers primed to be a critical threat for the next year and in the foreseeable future.
The infostealer market has proven resilient, rebounding after major law enforcement takedowns, including the Redline infostealer takedown in late 2024. The recent takedown of the Lumma infostealer infrastructure is expected to have a short-term effect on the infostealer market, but cybercriminals are expected to quickly fill the void left by the takedown.
The malware developer behind the Hellcat ransomware is now offering a new server-side infostealer, a shift from client-side malware. This new approach allows the threat actor to operate with a lower profile on the victim's machine, potentially spreading to individuals and small to midsize businesses that may not be configured to block TOR connections.
Infostealers have been a significant malware threat to individuals and organizations since several years. Recently, the international law enforcement community took down the Lumma infostealer infrastructure, disrupting one of the largest infostealers currently operating.
As infostealers become more sophisticated, they are expected to employ advanced tactics such as increased use of brand impersonation and drive-by download techniques, advanced stealth and persistence mechanisms, combination of remote access tools (RATs) and tunneling, and a shift from ransomware to data theft.
URL-based phishing campaigns have surged, now four times more prevalent than file-based malware delivery. Attackers exploit trusted platforms (GitHub, Discord, Pastebin) to spread infostealers like AsyncRAT and Skuld Stealer and use hijacked invite links on Discord as infection vectors.
Organizations are advised to focus on user training against social engineering, tighten controls on scripting and tunneling tools, segment networks to limit lateral movement, and enhance endpoint detection and response policies to counter these evolving threats.
In summary, the infostealer malware landscape for 2025–2026 is characterized by sophisticated stealthy delivery, expanding social engineering tactics, multi-tool persistence, and a shift from overt ransomware attacks to covert data exfiltration, demanding stronger human-focused training and advanced endpoint/network defenses. Infostealers were a prominent theme in the "2025 Cyber Threat Outlook" reports and are predicted to grow in prominence through 2025 and 2026.
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