Hacker

What Is a Hacker?

A hacker is an individual skilled in computer systems and coding who can identify and exploit weaknesses in software, hardware, or networks. The term often brings to mind cybercriminals who break into systems without permission, but not all hackers are malicious. Some use their skills to improve security and protect users.

Types of Hackers

Hackers are often grouped by “hat” colors, which reflect their intentions:

• Black hat hackers: Criminal hackers who break into systems for financial gain, data theft, or disruption.
• White hat hackers: Also known as ethical hackers, they test systems with permission to find vulnerabilities and help fix them.
• Gray hat hackers: Operate in between; they may break into systems without permission but without malicious intent, often exposing flaws publicly.

Other types include script kiddies (inexperienced hackers using pre-made tools), hacktivists (politically motivated hackers), and state-sponsored hackers (working for governments).

Crypto Hacks 2025

In the first half of 2025, crypto hackers pulled off record-shattering heists, most notably the Bybit breach, where attackers exploited a cold wallet during a routine Ethereum transfer and stole over $1.5 billion, marking the largest crypto theft ever, with the North Korean-linked Lazarus Group suspected.

Other high-profile incidents include a politically charged attack on Iran’s largest crypto exchange, Nobitex, where hackers called Predatory Sparrow siphoned more than $90 million from user funds and publicly condemned the platform’s ties to Iran’s Revolutionary Guard.

How to Protect Against Hackers in Crypto

• Use hardware wallets (cold storage) to keep your funds offline with strong cryptography.
• Enable two-factor authentication (2FA) on all exchange and wallet accounts.
• Beware of phishing attacks—avoid clicking on suspicious links or emails.
• Rely on reputable exchanges with strong security records.
• Set up multi-signature wallets for added protection on larger holdings.
• Run regular security audits if managing a platform or business.
• Support bug bounty programs to let ethical hackers find vulnerabilities.
• Keep software updated with the latest patches and security fixes.
• Monitor transactions regularly to catch suspicious activity early.