JAKARTA – A wave of Bitcoin ransomware attacks has highlighted how cybercriminals are exploiting cryptocurrency to extort victims worldwide, demanding payments in digital currency instead of traditional cash or bank transfers.

One of the most notable cases involved the WannaCry ransomware, which locked users out of their own files and demanded a payment of $300—roughly Rp4 million—in Bitcoin to restore access. Victims were instructed to transfer funds to specific Bitcoin addresses, with the promise of regaining control of their compromised data.

The attack spread rapidly, infecting hundreds of thousands of computers across more than 150 countries. Despite warnings from authorities, some victims complied with the demands, resulting in significant financial gains for the attackers. Investigations revealed that funds were funneled into three separate Bitcoin wallets, accumulating hundreds of millions of rupiah in total.

Experts say Bitcoin’s appeal lies in its decentralized nature and speed. Transactions occur directly between users without intermediaries, making cross-border transfers faster and more efficient than traditional banking systems. This same feature, however, also makes it attractive for illicit activities, as it can be more difficult to trace compared to conventional financial channels.

“Bitcoin operates without a central server, allowing peer-to-peer transactions globally with minimal barriers,” one expert explained, noting that anyone can easily access the technology through mobile applications.

Authorities have also raised concerns about the use of cryptocurrency in funding criminal networks, including terrorism. Indonesia’s Financial Transaction Reports and Analysis Center (PPATK) previously identified cases where extremist networks used digital currencies to bypass financial monitoring systems.

However, analysts caution against overstating the scale of such misuse. Compared to illegal transactions conducted through traditional banking systems, the proportion involving Bitcoin remains relatively small.

In Indonesia, Bitcoin and other cryptocurrencies are still not fully regulated by Bank Indonesia as official payment instruments. While their use continues to grow, adoption remains limited among the general population.

The rise of Bitcoin ransomware underscores a broader challenge for governments and cybersecurity experts: balancing the benefits of financial innovation with the risks of exploitation in an increasingly digital world.