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Stealc Stealer: New Malware Threats Emerge

Stealc Stealer: New Malware Threats Emerge

First seen 25 Oct 2026, 15:42 UTC • •

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ThreatCluster AI
ThreatCluster •October 25, 2026 at 16:44 UTC
  • •Stealc is a non-resident information stealer targeting Windows systems.
  • •It has been sold as Malware-as-a-Service since January 2023.
  • •The malware collects data from web browsers and cryptocurrency wallets.

Stealc is a new information stealer malware that has been sold as Malware-as-a-Service since January 9, 2023. It primarily targets Windows systems, stealing data from web browsers, cryptocurrency wallets, and other applications. The malware is advertised by its presumed developer, Plymouth, on Russian-speaking underground forums. It is designed to be non-resident, meaning it executes its tasks and then leaves the infected system. The malware collects sensitive data using several legitimate third-party DLLs and exfiltrates it to its command and control (C2) server. Security professionals are advised to treat any encounters with Stealc as serious, as it can compromise saved passwords and login sessions. The articles report that the malware is actively being used in the wild, with no specific patches or fixes mentioned yet. Current status indicates a growing concern among cybersecurity experts regarding its impact.

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Timeline

2023-01-09
Stealc first offered for sale
Stealc was introduced as a Malware-as-a-Service product on Russian-speaking forums.
2-Spyware
2026-10-25
Recent reporting on Stealc
New details about Stealc's capabilities and impact were published, highlighting its active use.
2-Spyware
2026-10-25
Malpedia details Stealc's functionality
Malpedia confirmed Stealc's data collection methods and its reliance on other malware.
malpedia.caad.fkie.fraunhofer.de

More articles in this cluster (4)

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Common questions

How does Stealc infect systems?
Stealc is typically spread through phishing emails, malicious ads, and compromised software.
What data does Stealc target?
Stealc primarily targets sensitive information from web browsers and cryptocurrency wallets.
Is there a way to remove Stealc?
Users are advised to follow specific removal steps outlined by security experts, which do not require additional software.