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Known

Claimed by Thegentlemen · listed 4 hours ago

Today
Age
since listed · data leaked

Status timeline

  1. ListedJul 31, 2026
  2. Data leakeddate unknown

At a glance

Group
Thegentlemen
Status
Data leaked
Country
Iceland
Sector
Technology
Listed on leak site
Jul 31, 2026

About the victim

AI dossier — public-source company profile

Known is an award-winning, data-driven marketing, creative, and media agency headquartered in New York. The company combines PhD data scientists with creative professionals to deliver performance-driven marketing and brand strategies for major clients including Microsoft, TikTok, and Grubhub. It has been recognized by Ad Age and Adweek as a top-tier independent agency.

Industry
Marketing & Advertising Agency
Address
New York, USA

Attack summary

Severity: low — The leak post contains only listing/announcement with no technical proof files, no specific data inventory disclosed, and no details on the nature or scope of the compromise. Insufficient evidence of actual data exfiltration or operational impact.

The ransomware group 'thegentlemen' claims to have compromised Known and published data. The post does not specify the type of compromise (encryption, exfiltration, or both) or what data categories were affected.

low

What the group claims

known.is zoominfo.com/c/known/480652891 Known is an award-winning, data-driven marketing, creative, and media agency headquartered in New York. The company uniquely combines PhD data scientists with world-class creatives to deliver measurable performance and breakthrough brand strategies for major clients like Microsoft, TikTok, and Grubhub. Recognized by Ad Age and Adweek as a top-tier agency, Known is dedicated to setting a new standard for modern marketing through science-led innovation and rigorous analytics

Sources

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, 2026Known 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 Technology sector, which has 3,563 disclosures indexed across all operators we track. Geographically, Known is reported in Iceland, a country with 2 ransomware disclosures in our corpus.

If your organisation is affected

A listing by thegentlemen means Known 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.