Was Pertamina hit by ransomware?

Pertamina was listed by the thegentlemen ransomware operation (Indonesia), and stolen data was published on the group's leak site. Darkfield tracks this disclosure with the original leak post, screenshot and group context.

Who is the thegentlemen ransomware group?

thegentlemen is a ransomware operator tracked by Darkfield. See the full operator dossier for its known victims, sectors targeted, IOCs and leak-site infrastructure.

What data was leaked in the Pertamina breach?

thegentlemen published data attributed to Pertamina. Darkfield captured the leak post and a screenshot of the listing.

Ransomware victim disclosure

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Pertamina

Claimed by Thegentlemen · listed 4 hours ago

Today

Age

since listed · data leaked

Status timeline

ListedJul 31, 2026
Data leakeddate unknown

At a glance

Group: Thegentlemen
Status: Data leaked
Country: Indonesia
Sector: Energy & Utilities
Listed on leak site: Jul 31, 2026

About the victim

AI dossier — public-source company profile

PT Pertamina (Persero) is Indonesia's state-owned integrated energy corporation operating across upstream, downstream, gas, and renewable energy sectors. With over six decades of operation, it ranks among Fortune Global 500 companies and is a primary driver of national energy sovereignty.

Industry: Oil & Gas, Integrated Energy
Address: Grha Pertamina, Jl. Medan Merdeka Timur No.11-13, Jakarta 10110, Indonesia
Employees: 40000+
Founded: 1957

Attack summary

Severity: critical — State-owned critical infrastructure operator; confirmed exfiltration of 1.2TB+ including SCADA documents, financial records, and employee data affecting a Fortune 500 company with national energy security implications.

The threat group claims to have exfiltrated over 1.2TB of data including NDA files, HR data, employee records, technical drawings, SCADA documents, financial statements, and confidential operational files from Pertamina's systems.

critical

Data the group says was taken

AI dossier — extracted from the leak post

NDA files
HR data
Employee records and user data
Technical drawings and models
SCADA documents
Bank accounting statements
Tax and legal documents
Confidential operational files
Work photographs and screenshots

What the group claims

pertamina.com REV - $23.2 Billion zoominfo.com/c/pt-pertamina/191250883 Pertamina is an energy company primarily in the oil and gas sector. The company provides services for new and renewable energy, and other activities related to or supporting business activities. We have taken NDA files, HR DATA, user data, employee data, technical drawings, models, bank accounting tax legal statements, SCADA documents, confidential files, photographs of work, screenshots and much more the total data volume is more than 1.2TB+ 1200 GB+ . Pertamina is Indonesia’s state-owned integrated energy corporation, operating across upstream, downstream, gas, and renewable energy sectors. With over six decades of operation, it is a primary driver of national energy sovereignty and consistently ranks among the Fortune Global 500 companies.

Sources

Victim sitepertamina.com

Source

Indexed 4 hours ago

This page surfaces a public ransomware disclosure indexed by Darkfield. Original posts come from the operator's own leak site; we cross-check against ransomware.live, RansomLook and RansomWatch where applicable. Share this URL freely.

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Disclosure context

About thegentlemen

thegentlemen is a ransomware group that emerged in September 2025, operating with apparent financial motivations based on their broad targeting of commercial sectors. The group has documented 267 victims across multiple countries, with primary focus on the United States, Thailand, France, Brazil, and India. Their targeting strategy demonstrates a preference for high-value sectors including manufacturing, technology, healthcare, and financial services organizations. Given the group's recent emergence and limited public documentation from established threat intelligence sources such as CISA, FBI, or major security research firms, specific details regarding their country of origin, operational structure, attack methodologies, encryption techniques, and whether they employ ransomware-as-a-service models remain unclear. The relatively high victim count of 267 in a short operational timeframe since September 2025 suggests either an aggressive campaign pace or potential inflation of victim numbers through affiliate operations, though without corroborating intelligence reports, the group's exact operational capabilities and notable campaigns cannot be definitively established. Current intelligence indicates the group remains active as of late 2025, though comprehensive threat profiling requires additional validated reporting from authoritative cybersecurity sources. The group has been linked to 696 public disclosures across our corpus. First observed on a leak site on September 9, 2025; most recent post July 31, 2026. The operation is currently active.

Also tracked as: the gentlemen.

Timeline of this disclosure

July 31, 2026Pertamina listed by thegentlemenon the group's public leak site

Other recent disclosures by thegentlemen

thegentlemen has been linked to 696 public victims on Darkfield. A sample of the most recent:

See the full thegentlemen dossier →

Sector and geography

This disclosure adds to ransomware activity in the Energy & Utilities sector, which has 167 disclosures indexed across all operators we track. Geographically, Pertamina is reported in Indonesia, a country with 37 ransomware disclosures in our corpus.

If your organisation is affected

A listing by thegentlemen means Pertamina appeared on a ransomware extortion site and data attributed to it has been published. If this is your organisation, or a supplier you depend on, the priority is to confirm the intrusion and contain it before the window to act closes.

Engage your incident-response team and preserve forensic evidence before remediating — do not wipe affected systems first.
Force a password reset and revoke active sessions for exposed accounts; rotate any credentials, API keys or certificates that may have been in the stolen data.
Assess regulatory notification duties (GDPR, NIS2, sector regulators) — many carry a 72-hour reporting clock from awareness.
Monitor for the data appearing on thegentlemen's leak site and across paste and breach channels, and brief downstream partners who may be exposed through you.

How we know this. Darkfield monitors public ransomware leak sites continuously, archiving every new disclosure and the data later released against the victim. Each entry on this page is sourced from the operator's own publication and cross-checked against complementary OSINT feeds (RansomLook, ransomware.live, RansomWatch). We do not collect or host stolen data — only the metadata, timestamps and screenshots needed to make the public disclosure searchable and accountable. Records here are corrected when the original post is edited, retracted, or merged with another disclosure.