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SynkLoader turns Microsoft Teams chats into a fake Windows lock

Feeds.4Sysops •IT News • August 21, 2026

A newly identified malware family called SynkLoader is being delivered through Microsoft Teams phishing messages that impersonate corporate IT staff. Its most deceptive component displays a fake Windows lock screen to capture passwords, while other modules provide persistence, remote control, network tunneling, and reconnaissance that could support ransomware attacks. Source

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This article is one source in a clustered incident — the cluster page carries the summary, timeline and every other outlet covering it.

New SynkLoader Malware Targets Microsoft Teams Users with Fake Lock Screen A new malware family named SynkLoader is being distributed through phishing campaigns on Microsoft Teams, impersonating corporate IT staff to steal credentials. The malware features a convincing fake Windows lock screen designed to capture user passwords. It also includes modules for persistence, remote control, and network tunneling, suggesting potential use in ransomware operations. The malware was first compiled around July 28, 2026, and utilizes a combination of Python, PowerShell, C#, and C++. Security researchers have identified various modules, including one that attempts to obtain Windows account passwords. Users are advised to verify IT requests independently and exercise caution with unsolicited MSI file installations. Indicators of compromise (IoCs) have been provided, but hashes are unique for each infection, limiting their use for defenders. 9 sources 70

Extracted Entities

SynkLoader turns Microsoft Teams chats into a fake Windows lock

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Extracted Entities

Attack Types (3)

Malware (1)

MITRE ATT&CK (2)

Platforms (1)

Tools (1)