Was Mochtar Karuwin Komar: Indonesian law firm - MKK hit by ransomware?

Mochtar Karuwin Komar: Indonesian law firm - MKK was listed by the crypto24 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 crypto24 ransomware group?

crypto24 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 Mochtar Karuwin Komar: Indonesian law firm - MKK breach?

crypto24 published data attributed to Mochtar Karuwin Komar: Indonesian law firm - MKK. Darkfield captured the leak post and a screenshot of the listing.

Ransomware victim disclosure

← All victims

Mochtar Karuwin Komar: Indonesian law firm - MKK

Claimed by Crypto24 · listed 1 year ago

15m

Age

since listed · data leaked

Status timeline

ListedApr 8, 2025
Data leakeddate unknown

At a glance

Group: Crypto24
Status: Data leaked
Country: Indonesia
Sector: Business Services
Listed on leak site: Apr 8, 2025

About the victim

AI dossier — public-source company profile

Mochtar Karuwin Komar (MKK) is a leading Indonesian law firm established in 1971, headquartered in Jakarta with an office in Singapore. The firm provides comprehensive legal services to domestic and international clients, with a team of experienced lawyers specializing in Indonesian law and commercial practice.

Industry: Legal Services
Address: 11th Floor WTC1, Jl. Jend. Sudirman Kav. 29-31, Jakarta 12920, Indonesia (primary office); 1 Raffles Place, #02-01 One Raffles Place Mall, Singapore 048616 (Singapore office)
Employees: 51-200
Founded: 1971

Attack summary

Severity: high — Confirmed exfiltration of sensitive attorney-client privileged communications, case files, and financial data from a major law firm serves multiple high-value clients. Legal and financial data at this scale poses significant regulatory and reputational risk.

The crypto24 group claims to have exfiltrated legal advice, case-related documents, financial information, and contracts from MKK. The post indicates data publication without specifying ransom demands or operational encryption.

high

Data the group says was taken

AI dossier — extracted from the leak post

Legal advice documents
Case-related documents
Financial information
Contracts
Billing records

What the group claims

Legal advice, case-related documents, financial information, contracts, billing

Sources

Victim sitemkklaw.net

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.

Is this your supplier? Your competitor? You?

Pro plans monitor your domain, corporate emails, and crypto wallets across every new ransomware leak-site post, breach dump and Telegram callout — alerts within 5 minutes.

Disclosure context

About crypto24

Crypto24 is a recently emerged ransomware group first observed in April 2025, with a primary financial motivation evidenced by their targeting of high-value sectors across multiple geographic regions. The group's origin and affiliations remain unclear due to their recent emergence, though their targeting pattern suggests either independent operations or a new ransomware-as-a-service offering given the diverse geographic spread of their 43 documented victims. Their attack methodology and specific technical capabilities have not yet been thoroughly documented by major threat intelligence providers, though their targeting of technology, financial services, healthcare, and business services sectors indicates they likely employ common initial access vectors such as phishing or exploitation of public-facing applications to gain entry into victim networks. The group has demonstrated a preference for targeting organizations primarily in the United States while also conducting operations across Southeast Asia including Malaysia, Singapore, and Indonesia, as well as extending their reach to Egypt, suggesting either a globally distributed affiliate network or opportunistic targeting based on vulnerable infrastructure discovery. Crypto24 remains active as of the latest available intelligence reporting, though given their recent emergence, comprehensive details about their specific tactics, techniques, and procedures await further analysis by established cybersecurity research organizations. The group has been linked to 49 public disclosures across our corpus. First observed on a leak site on April 8, 2025; most recent post May 18, 2026. The operation is currently active.

Timeline of this disclosure

April 8, 2025Mochtar Karuwin Komar: Indonesian law firm - MKK listed by crypto24on the group's public leak site

Other recent disclosures by crypto24

crypto24 has been linked to 49 public victims on Darkfield. A sample of the most recent:

See the full crypto24 dossier →

Sector and geography

This disclosure adds to ransomware activity in the Business Services sector, which has 3,796 disclosures indexed across all operators we track. Geographically, Mochtar Karuwin Komar: Indonesian law firm - MKK is reported in Indonesia, a country with 37 ransomware disclosures in our corpus.

If your organisation is affected

A listing by crypto24 means Mochtar Karuwin Komar: Indonesian law firm - MKK 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 crypto24'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.