One of the most common forms of hacking, malware is the hacker’s Swiss army knife. It comes in many forms, each tailored to specific objectives. Some malware is designed to be silent—watching, logging, and exfiltrating data over time. Others are loud and immediate, encrypting files or locking users out.
Once installed, malware can:
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Encrypt files and demand ransom (ransomware)
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Steal login credentials or browser sessions (spyware)
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Log keystrokes to capture sensitive inputs
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Exfiltrate databases and user files for resale
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Enable remote control of systems (remote access trojans)
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Launch denial-of-service attacks from within the network
Many breaches begin with malware embedded in email attachments, malicious scripts on websites, or compromised software updates. Once the payload executes, it can spread internally before any red flags are raised.
For instance, the LockBit ransomware gang has refined its toolkit to target Windows, Linux, and VMware ESXi systems, entering through stolen credentials or vulnerable RDP ports, and disabling backups before launching the final encryption.
