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RansomHouse Breaches Pertamina, Exposing Sensitive Data

RansomHouse Breaches Pertamina, Exposing Sensitive Data

First seen 18 Sep 2026, 05:32 UTC

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ThreatCluster AI
ThreatCluster September 18, 2026 at 07:54 UTC
  • RansomHouse claims to have breached Pertamina, exposing sensitive operational data.
  • Compromised data includes finance, maintenance, and cybersecurity incident records.
  • The breach is pending verification, indicating potential ongoing risks.

The RansomHouse hacking group claims to have breached Pertamina, Indonesia's state-owned energy company. The attack reportedly exposed sensitive files related to risk analysis, finance, maintenance planning, and personnel records. The breach was announced on September 17, 2026, with the threat actor publishing samples of the compromised material. The exact scope of data exposure is not specified, but it includes critical operational and confidential information. As of now, the breach is pending verification. This incident highlights the ongoing risks faced by organizations in Indonesia, particularly in the energy sector, amidst increasing cyber threats. The attack method and specific vulnerabilities exploited remain unclear.

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Timeline

2026-09-16
Indonesia Weekly Cyber Threat Newsletter published
The newsletter highlighted ongoing risks in the Indonesian cyber threat landscape, including ransomware and AI-enabled attacks.
Cyfirma
2026-09-17
RansomHouse claims breach of Pertamina
RansomHouse published samples of allegedly compromised files, including sensitive operational data.
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