Indonesiepagina Data Breach: 14,439 Dutch Users Exposed (2018)

A Dutch Blog About Indonesia and the Credentials It Left Behind

Indonesiepagina.nl operated as a Dutch blog covering Indonesia -- travel, culture, business, and connections between the Netherlands and the Indonesian archipelago. It's a niche comunity platform whose 14,439 registered users certainly weren't expecting to find their credentials in an underground forum combolist. When the database appeared in August 2018 with MD5-hashed passwords, it added another set of Dutch email addresses and crackable password hashes to the combolist ecosystem that attackers draw from frequentley in stuffing campaigns targeting Dutch-language and European platforms where those same credentials had been reused.

Indonesiepagina (August 2018): Breach Summary

• Records Exposed: 14,439
• Data Types: Email addresses, MD5 password hashes
• Breach Type: Database dump / Combolist
• Country Affected: Netherlands
• Date Leaked: August 26, 2018

MD5 and the Rainbow Table Problem

MD5 password hashes without salting are fully rainbow-tableable. This means that common passwords -- and a significant percentage of any real-world password dataset consists of common passwords -- can be recovered instantly by looking them up in precomputed tables, with no computational effort required at cracking time. More complex passwords require GPU acceleration to crack, but even those typically fall within hours to days on commodity hardware. By the time the Indonesiepagina database circulated on underground forums, the most common passwords in the set were already recovered. The remaining hashes provided attackers with a steady stream of additional plaintext credentials as cracking campaigns continued to process the dataset over subsequent weeks and months.

Dutch Users and GDPR's Early Months

The Indonesiepagina breach surfaced in August 2018 -- just three months after GDPR took effect across the EU. Dutch users were among the first European populations to theoretically benefit from GDPR's breach notification requirements, which mandate disclosure within 72 hours and appropriate technical security measures including proper password storage. MD5 without salting fails that standard unambiguously. Whether the breach was ever reported to Dutch data protection authorities (the Autoriteit Persoonsgegevens) is unclear, but the lack of any public coverage suggests notification likely never occurred -- particularly if the blog operated as a small informal community site without formal organizational structure capable of managing regulatory compliance.

The Netherlands in the August 26, 2018 Mass Release

Indonesiepagina was the Netherlands' contribution to the August 26, 2018 combolist cluster -- a mass release spanning more than ten organizations across the Netherlands, Germany, Thailand, the United States, Italy, Ireland, Japan, Nepal, and Poland. The single-day release of databases from such diverse geographies and platform types points to a batch dump operation: a threat actor clearing out an accumulated inventory of previously hoarded breach data and releasing it en masse to underground forums for maximum distribution and combolist adoption.

Check If Your Credentials Were Exposed

HEROIC's free breach scanner searches across more than 400 billion exposed records -- including community blog databases like Indonesiepagina. If you've registered on Dutch-language community sites or Indonesia-focused platforms, your credentials may be in circulation. A scan takes seconds and can flag active exposure before it's exploited in a credential stuffing attack on a platform you still use today.