Disclosure context

About Darkleakmarket

Darkleakmarket is a financially motivated ransomware group that emerged in September 2021, primarily targeting organizations in the United States across finance, healthcare, technology, and energy sectors. The group has claimed responsibility for attacks against 39 known victims, though specific details about their country of origin and potential affiliations with other cybercriminal organizations remain undocumented in public threat intelligence reports. Limited public information exists regarding their specific attack methodologies, initial access vectors, or whether they employ double extortion tactics involving data theft prior to encryption. No major high-profile campaigns or significant law enforcement actions against Darkleakmarket have been publicly documented by major security agencies or researchers. The current operational status of this group remains unclear due to the limited public reporting and intelligence available about their activities since their initial emergence. The group has been linked to 39 public disclosures across our corpus. First observed on a leak site on September 9, 2021; most recent post June 17, 2025. The operation is currently inactive.

Timeline of this disclosure

September 9, 2021Upstox.com Huge Data listed by Darkleakmarketon the group's public leak site

Sector and geography

This disclosure adds to ransomware activity in the Financial Services sector, which has 516 disclosures indexed across all operators we track. Geographically, Upstox.com Huge Data is reported in India, a country with 255 ransomware disclosures in our corpus.

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.

Ransomware victim disclosure

← All victims

Upstox

listed as Upstox.com Huge Data · Claimed by Darkleakmarket · listed 5 years ago

57m

Age

since listed · data leaked

Status timeline

Listed
Sep 9, 2021
Data leaked

At a glance

Group: Darkleakmarket
Status: Data leaked
Country: India
Sector: Financial Services
Listed on leak site: Sep 9, 2021

About the victim

AI dossier — public-source company profile

Upstox is an Indian online discount brokerage and investment platform headquartered in Mumbai, Maharashtra. The platform serves over 13 million (1.3 crore) registered users, offering trading and investing in equities, futures and options, commodities, currencies, mutual funds, IPOs, and insurance products. It is backed by prominent investors and operates one of India's leading retail trading apps.

Industry: Online Stock Brokerage & Investment Platform
Address: 30th Floor, Sunshine Tower, Senapati Bapat Marg, Dadar (W), Mumbai, Maharashtra 400013, India
Employees: 501-1000
Founded: 2009

Attack summary

Severity: critical — Upstox is a regulated financial services platform with over 13 million retail investors; a confirmed data publication by a threat actor implies large-scale exfiltration of regulated financial PII, KYC records, and investment data — meeting the critical threshold for regulated/sensitive data at scale.

The group Darkleakmarket claims to have obtained and published a large dataset from Upstox, described as 'Huge Data', with no ransom demand stated. No specific details of the exfiltration method or precise data categories were captured in the leak post.

critical

Data the group says was taken

AI dossier — extracted from the leak post

Customer personal data (PII)
Financial account information
Trading/investment records
KYC documentation (likely)

Sources

Victim siteupstox.com

Source

Indexed 5 years 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.