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Momentum

Claimed by EndZone · listed 2 hours ago

7500000
Records
Today
Age
since listed · negotiating

Status timeline

  1. ListedSep 26, 2026

Current state: Negotiating

At a glance

Group
EndZone
Status
Negotiating
Sector
Telecommunications
Listed on leak site
Sep 26, 2026
Records
7500000

About the victim

AI dossier — public-source company profile

Momentum is a telecommunications company founded in 2001 that provides cloud-based communication solutions for businesses, including cloud voice services, managed networks, SD-WAN solutions, and Microsoft Teams Phone integration. The company operates a diagnostic and provisioning tool that manages internet and voice services for millions of users across global markets through multiple service operators (MSOs).

Industry
Telecommunications & Cloud Communications
Founded
2001

Attack summary

Severity: critical — Confirmed exfiltration of PII at massive scale (7.5+ million users); demonstrated operational disruption to critical communications infrastructure affecting hundreds of thousands of customers; ongoing ransom negotiation with threat of public disclosure.

EndZone claims to have compromised Momentum's diagnostic and provisioning tool via a Multi-Service Operator (MSO), gaining access to personally identifiable information for over 7.5 million users across all MSOs. The group states it has caused widespread operational disruption by deleting over 100,000 modem packages, cutting tens of thousands of customers from internet service, and threatens to publish exfiltrated data on October 5, 2026 unless the company negotiates.

critical

Data the group says was taken

AI dossier — extracted from the leak post
  • PII for 7.5+ million users
  • Customer names and contact information
  • Billing account details
  • Service configurations and modem MAC addresses
  • MSO network configurations

The group's post references roughly 5 sample user records shown; operational disruption corroborated by referenced news article proof files.

What the group claims

Momentum is a telecommunications company founded in 2001 that provides cloud-based communication solutions for businesses, specializing in cloud voice services, managed networks, SD-WAN solutions, and Microsoft Teams Phone integration. Attackers gained access via a compromised Multi-Service Operator (MSO) diagnostic and provisioning tool, exposing PII for over 7.5 million users and causing widespread internet outages by deleting over 100,000 modem packages.

The leak post

captured from the group's site
Data will be public on: October 5, 2026
URGENT: Momentum we were very patient. Why ignore us when you know how big of a breach this is? YOU reached out. We can still resolve this. Reach back out and stop going ghost.
UPDATE AS OF SEP 25, 2026 - MOMENTUM YOU HAVE GONE GHOST YET AGAIN. WE WILL NOT TAKE THIS DOWN UNTIL YOUR COMMUNICATION PICKS UP. HURRY.
Momentum is a telecommunications company founded in 2001 that provides cloud-based communication solutions for businesses, specializing in cloud voice services, managed networks, SD-WAN solutions, and Microsoft Teams Phone integration. We gained access to a diagnostic and provisioning tool used by Momentum through a compromised Multi-Service Operator (MSO). Upon reconnaissance, we identified multiple critical vulnerabilities throughout the system. This tool controls internet and voice services for millions of users across global markets. We successfully accessed user data for every MSO, exposing personally identifiable information (PII) for over 7.5 million users. They didn't notice the prolonged access or the customer data dump for a while, but when we started deleting modems they noticed. They kept burning access and we gained it ba…

Data the group says was taken

  • PII
  • user data
  • names
  • addresses
  • phone numbers
  • email addresses
  • billing information
  • IP addresses

Screenshot of the leak post

Leak screenshot for Momentum

Sources

Source

Indexed 2 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 EndZone

EndZone is a ransomware group first observed in September 2026, operating with an apparent financial motivation based on its targeting profile, though limited public documentation exists given its early stage of activity. The group has claimed two known victims to date, with targeting concentrated in the United States across the Government and Defense and Technology sectors, suggesting a deliberate focus on high-value organizations likely to possess sensitive data and the financial resources or political pressure to meet ransom demands. Due to the group's nascent operational history and limited victim count, no detailed technical attribution, affiliation, or country of origin has been publicly established by CISA, the FBI, Mandiant, or other reputable security research organizations at this time. Similarly, specific details regarding initial access vectors, tooling, encryption methodology, or extortion tactics have not yet been publicly documented, though the targeting of government and defense entities is consistent with broader ransomware trends involving double extortion and data exfiltration pressure. No notable high-profile campaigns, law enforcement actions, or confirmed ransom figures have been publicly attributed to EndZone as of the time of this profile, and the group should be considered an emerging threat actor under continued monitoring given its sector targeting patterns. The group has been linked to 8 public disclosures across our corpus. First observed on a leak site on September 18, 2026; most recent post September 26, 2026. The operation is currently active.

Timeline of this disclosure

  • September 26, 2026Momentum listed by EndZone on the group's public leak site
Records
7500000

Other recent disclosures by EndZone

EndZone has been linked to 8 public victims on Darkfield. A sample of the most recent:

See the full EndZone dossier →

Sector and geography

This disclosure adds to ransomware activity in the Telecommunications sector, which has 87 disclosures indexed across all operators we track.

If your organisation is affected

A listing by EndZone means Momentum appeared on a ransomware extortion site and is being pressured to pay before any publication. 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 EndZone'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.