Was PT Indo Tambangraya Megah hit by ransomware?

PT Indo Tambangraya Megah was listed by the Ransomhouse ransomware operation (Indonesia) as a victim being extorted; data had not been published at the time of listing. Darkfield tracks this disclosure with the original leak post, screenshot and group context.

Who is the Ransomhouse ransomware group?

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

Ransomware victim disclosure

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PT Indo Tambangraya Megah

Claimed by Ransomhouse · listed 3 hours ago

Today

Age

since listed · listed for ransom

Status timeline

ListedOct 3, 2026

Current state: Listed for ransom

At a glance

Group: Ransomhouse
Status: Listed for ransom
Country: Indonesia
Sector: Mining
Listed on leak site: Oct 3, 2026

About the victim

AI dossier — public-source company profile

PT Indo Tambangraya Megah is an Indonesian mining company. Limited public information is available about its operations, scale, or specific commodities.

Industry: Mining

Attack summary

Severity: medium — Company is listed on the group's leak site with 'EVIDENCE' status, indicating claimed data exfiltration, but no proof files, data inventory, or specific breach details are publicly advertised in the available post excerpt.

Ransomhouse claims to have compromised PT Indo Tambangraya Megah and lists it with 'EVIDENCE' status on their leak site, suggesting they possess exfiltrated data, though no specific details about the breach scope or data types are disclosed in this post.

medium

The leak post

captured from the group's site

Below is a list of companies that either have considered their financial gain to be above the interests of their partners / individuals who have entrusted their data to them or have chosen to conceal the fact that they have been compromised.
[Jiangsu Zenergy Battery Technologies Group Co., Ltd. ](http://zohlm7ahjwegcedoz7lrdrti7bvpofymcayotp744qhx6gjmxbuo2yid.onion/r/dc227a632118c7c3f9c1e30d3715c607390ee1ae)
[Ma Pak Leung Company Limited ](http://zohlm7ahjwegcedoz7lrdrti7bvpofymcayotp744qhx6gjmxbuo2yid.onion/r/08394e9fad8016695748ec838b6874bc2d0a8824)
[[DISCLOSED] California School Employees Association ](http://zohlm7ahjwegcedoz7lrdrti7bvpofymcayotp744qhx6gjmxbuo2yid.onion/r/a8b46b22d6de4e2268a5643cd0203d118bd67a35)
[ PT Indo Tambangraya Megah Status: EVIDENCE, Hospital Hermilio Valdizán Status: EVIDENCE, Terca Status: EVIDENCE](http://zohlm7ahjwegcedoz7lrdrti7bvpofymcayotp744qhx6gjmxbuo2yid.onion/)

Screenshot of the leak post

Leak screenshot for PT Indo Tambangraya Megah

Sources

Source

Indexed 3 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 Ransomhouse

Ransomhouse is a ransomware group that emerged in June 2021, operating primarily for financial gain through extortion campaigns targeting organizations across multiple sectors globally. The group's origin and specific affiliations remain unclear based on publicly available intelligence, though their operational patterns suggest they function as an independent cybercriminal organization rather than a traditional ransomware-as-a-service model. Ransomhouse employs double extortion tactics, stealing sensitive data before deploying their ransomware payload and threatening to publish the information on their leak site if victims refuse to pay the demanded ransom. The group has demonstrated a broad targeting approach, with documented attacks against 187 victims primarily concentrated in the United States, China, United Kingdom, Italy, and Spain, focusing heavily on healthcare, technology, business services, and manufacturing sectors. While specific high-profile campaigns have not been extensively documented by major security firms, the group's consistent victim count and geographic distribution indicate sustained operational capability since their emergence. As of current reporting, Ransomhouse remains active with no known major law enforcement disruptions or confirmed rebranding efforts. The group has been linked to 238 public disclosures across our corpus. First observed on a leak site on June 1, 2021; most recent post October 3, 2026. The operation is currently active.

Also tracked as: RANSOM HOUSE.

Timeline of this disclosure

October 3, 2026PT Indo Tambangraya Megah listed by Ransomhouse on the group's public leak site

Other recent disclosures by Ransomhouse

Ransomhouse has been linked to 238 public victims on Darkfield. A sample of the most recent:

See the full Ransomhouse dossier →

Sector and geography

This disclosure adds to ransomware activity in the Mining sector. Geographically, PT Indo Tambangraya Megah is reported in Indonesia, a country with 77 ransomware disclosures in our corpus.

If your organisation is affected

A listing by Ransomhouse means PT Indo Tambangraya Megah appeared on a ransomware extortion site and is being pressured to pay before any publication. 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 Ransomhouse'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.