What it is
What you may notice
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Unexpected prompts for re-login or MFA
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New browser extensions or odd redirects
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Spikes in network traffic when idle
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Security tools crashing or failing to update
How it gets in
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Phishing emails with booby-trapped attachments
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Fake software updates and repacked installers
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Malvertising and sketchy download sites
Remove it now - quick steps
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Disconnect from the internet to stop data exfiltration.
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Run a full anti-malware scan, quarantine results, reboot, then scan again.
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From a clean device, change passwords for email, banking, and cloud accounts and enable MFA.
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Check startup items, scheduled tasks, services, and browser extensions and remove unknown entries.
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Review firewall or DNS logs and block contacted domains/IPs.
Prevent it
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Install software only from official sources and avoid cracks or repacks.
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Keep Windows, browsers, and Office updated and block macros by default.
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Use reputable EDR or anti-malware with email and web filtering.
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Turn on DNS filtering to block known malicious hosts.
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Train users to verify money or account changes out of band.