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sago.com

Claimed by BrainCipher · listed 4 days ago

4d
Age
since listed · data leaked

Status timeline

  1. ListedAug 31, 2026
  2. Data leakeddate unknown

At a glance

Group
BrainCipher
Status
Data leaked
Sector
Technology
Listed on leak site
Aug 31, 2026

About the victim

AI dossier — public-source company profile

Sago is a market research and consumer insights company with 55 years of industry experience. They provide qualitative and quantitative research solutions, audience recruitment, AI-powered research platforms, and consulting services across industries including CPG, financial services, healthcare, and technology.

Industry
Market Research & Consumer Insights
Founded
1971

Attack summary

Severity: critical — Confirmed exfiltration of regulated sensitive data including medical records, financial data, and NDA-protected research participant information at scale (56,000 files); research participants' data may include PII and health information regulated under privacy laws.

BrainCipher claims to have exfiltrated approximately 56,000 documents and files from Sago, including business relationship data involving over 800 clients, research participant data covered by NDAs, and medical and financial records.

critical

Data the group says was taken

AI dossier — extracted from the leak post
  • business relationship data (800+ clients)
  • research participant records
  • NDA-covered research data
  • medical data
  • financial data

Original description

AI-summarised, not from the leak post

Sago is a market research and insights company headquartered in the United States. It specializes in connecting brands and researchers with qualified participants for qualitative and quantitative research studies, including focus groups, online surveys, and in-depth interviews. Formerly known as Schlesinger Group, Sago serves clients across various industries seeking consumer and professional insights to inform business decisions.

The leak post

captured from the group's site
We have approximately 56,000 (56k) documents and files belonging to your company, including data on business relationships with more than 800 clients; data on research participants covered by NDAs; and medical and financial data. If you think you are here by mistake, please contact us at [email protected]
⏳ Deadline: September 12, 2026 at 13:00

Sources

Source

Indexed 4 days 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 Braincipher

Braincipher is a recently emerged ransomware group that was first observed in July 2024, operating with apparent financial motivations and targeting organizations primarily across North America and Europe. The group's origin and potential affiliations remain largely undocumented by major threat intelligence organizations, though their targeting patterns suggest a broad opportunistic approach rather than nation-state backing, likely operating as an independent entity rather than through established ransomware-as-a-service infrastructure. Their attack methodology and specific technical capabilities have not been extensively documented by CISA, FBI, or major security research firms, though their victim distribution across 44 confirmed targets spanning business services, manufacturing, technology, and healthcare sectors indicates a generalist approach to target selection rather than sector-specific expertise. No major high-profile campaigns or significant law enforcement actions have been publicly documented against this group by reputable sources, suggesting either a relatively low-impact operational scale or insufficient intelligence collection on their activities. As of current reporting, the group's operational status remains unclear due to limited public documentation from established threat intelligence sources. The group has been linked to 78 public disclosures across our corpus. First observed on a leak site on July 1, 2024; most recent post August 31, 2026. The operation is currently active.

Also tracked as: brain cipher.

Timeline of this disclosure

  • August 31, 2026sago.com listed by Braincipheron the group's public leak site

Other recent disclosures by Braincipher

Braincipher has been linked to 78 public victims on Darkfield. A sample of the most recent:

See the full Braincipher dossier →

Sector and geography

This disclosure adds to ransomware activity in the Technology sector, which has 3,577 disclosures indexed across all operators we track.

If your organisation is affected

A listing by Braincipher means sago.com 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 Braincipher'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.