Was FKS Group hit by ransomware?

FKS Group was listed by the Sarcoma 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 Sarcoma ransomware group?

Sarcoma 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 FKS Group breach?

Sarcoma published data attributed to FKS Group (~177 GB). Darkfield captured the leak post and a screenshot of the listing.

Ransomware victim disclosure

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FKS Group

Claimed by Sarcoma · listed 1 year ago

177 GB

Data size

15m

Age

since listed · data leaked

Status timeline

ListedApr 8, 2025
Data leakeddate unknown

At a glance

Group: Sarcoma
Status: Data leaked
Country: Indonesia
Listed on leak site: Apr 8, 2025
Data size: 177 GB

About the victim

AI dossier — public-source company profile

FKS Group is a South-East Asian holding company with significant interests in food production, logistics, infrastructure, and property development. The group operates through multiple subsidiaries across the region, with a stated focus on agricultural businesses, sugar refineries, infrastructure projects, and real estate development.

Industry: Holding Company; Food, Infrastructure & Property Development

Attack summary

Severity: high — Confirmed exfiltration of 177 GB of data from a large multi-sector holding company with regional operations; likely includes sensitive business, financial, and operational data across food, infrastructure, and property divisions.

Sarcoma ransomware group claims to have exfiltrated 177 GB of data from FKS Group. The post indicates data publication but provides no specific details on encryption, operational disruption, or data categories beyond the archive size.

high

Data the group says was taken

AI dossier — extracted from the leak post

Business documents
Financial records
Operational files

What the group claims

FKS Group FKS Group is a South-East Asian holding company focused on food, infrastructure and property. Its companies combine a strong commitment to logistics and infrastructure with deep domestic and international understanding to realize the potential of businesses and people across the region. FKS Group strives to exceed stakeholders’ expectation and investment by ensuring a continued growth of the Group and developing employee’s competencies. The Group’s significant interests in agriculture, sugar refineries, infrastructure and property developments are managed by the subsidiaries.Geo: Singapore - Leak size: 177 GB Archive - Contains: Files

Source

Indexed 1 year 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 Sarcoma

Sarcoma is a relatively new ransomware group that emerged in October 2024, operating with apparent financial motivations and demonstrating a broad international targeting approach with at least 140 documented victims across multiple countries and industry sectors. The group's origin and affiliations remain unclear due to its recent emergence, with no publicly documented connections to established ransomware families or confirmation of whether they operate as an independent entity or through a Ransomware-as-a-Service model. Limited public information is available regarding Sarcoma's specific attack methodologies, initial access vectors, or technical capabilities, though their targeting patterns suggest opportunistic rather than highly selective victim selection across diverse industries including manufacturing, business services, agriculture and food production, and technology sectors. The group has shown a particular focus on victims in the United States while also maintaining operations against targets in Italy, Canada, Germany, and Australia, though no specific high-profile attacks or record ransom demands have been publicly documented by major security firms or law enforcement agencies. Given the group's recent emergence in late 2024, Sarcoma appears to remain active with no reported law enforcement disruptions or confirmed rebranding activities at this time. The group has been linked to 150 public disclosures across our corpus. First observed on a leak site on October 9, 2024; most recent post May 12, 2026. The operation is currently active.

Also tracked as: Sarcoma Ransomware Group.

Timeline of this disclosure

April 8, 2025FKS Group listed by Sarcomaon the group's public leak site

Data size: 177 GB

Other recent disclosures by Sarcoma

Sarcoma has been linked to 150 public victims on Darkfield. A sample of the most recent:

See the full Sarcoma dossier →

Sector and geography

Geographically, FKS Group is reported in Indonesia, a country with 77 ransomware disclosures in our corpus.

If your organisation is affected

A listing by Sarcoma means FKS Group 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 Sarcoma'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.