Jakarta Nanyang School Listed by tengu Ransomware Group

On January 26, 2026, Jakarta Nanyang School appeared on the leak site of the tengu ransomware group, with the attackers claiming to have exfiltrated internal files from the Indonesian private school that serves children aged 3 to 18.

Reported Details of the Incident

Public reporting indicates the school’s data was listed following a ransomware deployment. The internal files were allegedly exfiltrated, although the exact volume and specific categories of records remain unclear from available reporting. Jakarta Nanyang School, located in Bumi Serpong Damai, operates kindergarten, primary, secondary, and junior college programs. The institution has not yet issued a public statement confirming the breach or detailing the types of information involved, such as student records, parent contact details, employee payroll, or financial documents.

The listing appeared on the group’s onion site, which is tracked by ransomware.live. No deadline for ransom payment has been publicly confirmed in secondary coverage, and the current status of any negotiations is unknown.

Why This Matters for You and Your Family

When a school that holds your child’s enrollment forms, medical notes, emergency contacts, or family addresses is breached, the information can quickly move beyond the attacker’s hands. Student and parent data frequently contains full names, dates of birth, home addresses, phone numbers, and email accounts — exactly the building blocks used in identity theft, phishing campaigns, and harassment. Families who chose Jakarta Nanyang School for its holistic approach now face the reality that records meant to protect and nurture their children may instead expose them.

Even when the number of affected individuals is listed as unknown, any parent or staff member associated with the school should assume their family’s details are at risk until proven otherwise.

The Doxxing and Identity-Chain Risks

Ransomware leaks rarely stop at the initial dataset. Once internal files surface on dark-web forums, other criminals scrape them for email addresses, usernames, and passwords. These credentials are then tested across gaming platforms, social media, and financial services. A child’s gaming account linked to a parent’s email can become the entry point for doxxing that reveals the family’s home address, daily routines, and photographs. Credential leaks like this one cascade into account takeovers and doxxing chains, especially when children’s handles are tied to the same household information stored in school records.

Tengu Ransomware Group’s Known Activity

Public reporting attributes the attack to the tengu ransomware group. The group emerged in late 2024 and has targeted organizations across education, healthcare, and small-to-medium businesses. Notable prior victims include other private schools and regional service providers. Their typical playbook involves initial access through phishing or unpatched remote desktop services, followed by exfiltration of sensitive files before encryption. They then publish samples on their leak site and demand payment, using the threat of full data release or sale to third parties as leverage. Details beyond these patterns remain limited in open sources.

What to do

• Run a DoxxScan to map every link between your family’s emails, phone numbers, gaming handles, and real-world identities so you can break the chains before criminals exploit them.
• Rotate any password used at Jakarta Nanyang School anywhere it has been reused, and switch on two-factor authentication through an authenticator app rather than SMS.
• Enable continuous DoxxScan monitoring across 13.1B+ breach records and 100+ platforms so the next leak exposing your household is caught in hours, not months.
• Cover the entire household with DoxxScan family protection, which extends to dependents and children’s gaming accounts that often chain back to the same address or parent email.
• Let remediation specialists handle takedown requests across data brokers and leak sites while you focus on securing your family’s daily digital life.

The incident at Jakarta Nanyang School is a reminder that any organization storing your family’s information can become a target, and the fallout often reaches your home faster than expected. Start your DoxxScan trial today and combine continuous monitoring across billions of breach records with AI-powered identity-chain mapping and hands-on remediation by specialists. DoxxScan is also effective for protecting gaming accounts — yours or your children’s — because credential leaks like this one routinely cascade into account takeovers and doxxing chains.