Disclosure context

About Blackbyte

BlackByte is a ransomware-as-a-service (RaaS) operation that emerged in October 2021, primarily motivated by financial gain through double extortion tactics targeting organizations across multiple sectors. The group is suspected to operate from Russia or former Soviet states based on their use of Russian-language forums and avoidance of targeting organizations in Commonwealth of Independent States countries, though they maintain no confirmed links to other established ransomware families. BlackByte operators typically gain initial access through vulnerable Microsoft Exchange servers, phishing campaigns, and exploitation of remote desktop protocol (RDP) services, employing tools such as Cobalt Strike for lateral movement and data exfiltration before deploying their custom ransomware payload that uses AES-256 encryption with RSA-2048 key protection. The group has demonstrated particular focus on critical infrastructure sectors, with the FBI and CISA issuing joint advisories in February 2022 highlighting attacks against organizations in government, healthcare, manufacturing, and education sectors, including notable incidents affecting San Francisco's transportation authority and multiple healthcare systems across the United States. BlackByte remains active as of 2024, continuing to evolve their tactics and maintain their leak site for publishing stolen data from victims who refuse to pay ransoms. The group has been linked to 147 public disclosures across our corpus. First observed on a leak site on October 4, 2021; most recent post July 30, 2025. The operation is currently inactive.

Timeline of this disclosure

July 30, 2025Cpat Flex listed by Blackbyteon the group's public leak site

Sector and geography

This disclosure adds to ransomware activity in the Not Found sector, which has 4,859 disclosures indexed across all operators we track. Geographically, Cpat Flex is reported in Brazil, a country with 319 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

Cpat Flex

Claimed by Blackbyte · listed 10 months ago

Age

since listed · data leaked

Status timeline

Listed
Jul 30, 2025
Data leaked

At a glance

Group: Blackbyte
Status: Data leaked
Country: Brazil
Sector: Not Found
Listed on leak site: Jul 30, 2025

About the victim

AI dossier — public-source company profile

CPAT FLEX provides specialized ingress and leakage detection solutions for Hybrid Fiber-Coaxial (HFC) networks used by cable operators. The company offers hardware and software tools designed to detect network noise, cable leakage, and ensure regulatory compliance in broadband network operations.

Industry: Telecommunications Equipment & Network Management

Attack summary

Severity: low — Data has been published but no proof files, screenshots, or detailed inventory of exfiltrated data are advertised. No specific sensitive data categories are mentioned. The posting appears to be a listing/announcement without substantive proof.

Blackbyte claims to have exfiltrated data from CPAT FLEX. No specific details about the nature or scope of exfiltrated data are provided in the leak post.

low

What the group claims

CPAT FLEX provides innovative ingress and leakage detection solutions specifically designed for Hybrid Fiber-Coaxial (HFC) networks. Their product lineup includes a range of advanced tools that enhance network performance, ensure reliability, and simplify maintenance for network operators. Targeting cable network providers, they offer solutions for both ingress noise management and cable leakage detection, ensuring compliance with industry regulations. CPAT FLEX emphasizes creativity and collaboration to help clients improve service quality and reduce operational disruptions.

Sources

Victim sitewww.cpatflex.com

Source

Indexed 10 months 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.