Menu

  • Alerts
  • Incidents
  • News
  • APTs
  • Cyber Decoded
  • Cyber Hygiene
  • Cyber Review
  • Cyber Tips
  • Definitions
  • Malware
  • Threat Actors
  • Tutorials

Useful Tools

  • Password generator
  • Report an incident
  • Report to authorities
No Result
View All Result
CTF Hack Havoc
CyberMaterial
  • Education
    • Cyber Decoded
    • Definitions
  • Information
    • Alerts
    • Incidents
    • News
  • Insights
    • Cyber Hygiene
    • Cyber Review
    • Tips
    • Tutorials
  • Support
    • Contact Us
    • Report an incident
  • About
    • About Us
    • Advertise with us
Get Help
Hall of Hacks
  • Education
    • Cyber Decoded
    • Definitions
  • Information
    • Alerts
    • Incidents
    • News
  • Insights
    • Cyber Hygiene
    • Cyber Review
    • Tips
    • Tutorials
  • Support
    • Contact Us
    • Report an incident
  • About
    • About Us
    • Advertise with us
Get Help
No Result
View All Result
Hall of Hacks
CyberMaterial
No Result
View All Result
Home Incidents

Telefonica Confirms Major Data Breach

January 13, 2025
Reading Time: 2 mins read
in Incidents
Telefonica Hit by Breach Exposing 236K Customer Records and Internal Documents

Telefonica has confirmed a breach of its internal systems, with hackers claiming to have stolen over 236,000 lines of customer data. The data was reportedly exfiltrated from a Jira database, with the attackers posting screenshots of the stolen information on a hacking forum. In addition to the customer data, the breach also includes internal ticketing data and more than 5,000 documents in various formats, including PDFs, Word files, and PowerPoint presentations.

According to cybersecurity firm Hudson Rock, the breach was facilitated by infostealer malware, which compromised the credentials of more than 15 Telefonica employees. The attackers used social engineering tactics to expand their access, specifically targeting employees with administrative privileges to gain control over critical servers. This method allowed the hackers to access sensitive operational details, including project plans, internal workflows, and vulnerabilities within the company’s infrastructure.

Wire Tor, an ethical hacking company, identified three of the attackers as members of the Hellcat ransomware group, with an estimated 2.3GB of stolen data. Hudson Rock’s analysis further revealed that 24,000 employee emails and names were exposed, as well as 500,000 Jira issues and summaries. These documents may contain confidential information, presenting a significant risk to Telefonica’s security and operations. The breach has raised concerns about the exploitation of internal weaknesses and the potential for further attacks.

Telefonica has taken steps to block unauthorized access.

Telefonica has taken steps to block unauthorized access and is currently investigating the breach. The company confirmed that the breach involved strategic targeting and manipulation of its internal systems, with the attackers leveraging multiple techniques to maintain persistence within its infrastructure. Hudson Rock’s findings indicate a pattern of vulnerability, noting that 531 employee computers had been infected with infostealers in 2024 alone, which had led to the theft of corporate credentials. This attack highlights the increasing sophistication of cyber threats targeting large corporations.

.

Reference:

  • Telefonica Hit by Breach Exposing 236K Customer Records and Internal Documents
Tags: cyber incidentsCyber Incidents 2025CyberattackData BreachesJanuary 2025Telefonica
ADVERTISEMENT

Related Posts

Infostealer Hidden in Steam Game

Hackers Target Amazon’s AI Code Bot

July 25, 2025
Infostealer Hidden in Steam Game

APTs Use Fake Dalai Lama Apps to Spy

July 25, 2025
Infostealer Hidden in Steam Game

Infostealer Hidden in Steam Game

July 25, 2025
Interlock Ransomware Threat Alert

Hackers Use Ransomware on SharePoint Servers

July 24, 2025
Interlock Ransomware Threat Alert

Data Breach Affects 340K Jobseekers

July 24, 2025
Interlock Ransomware Threat Alert

Beluga Vodka Ransomware Attack Reported

July 24, 2025

Latest Alerts

CastleLoader Uses Clickfix on Windows

Sophos, SonicWall Patch Critical RCE Bugs

Koske Malware Hides in Panda Images

Interlock Ransomware Threat Alert

GitLab Patches Key Vulnerabilities

Backdoor Found in WP Plugins

Subscribe to our newsletter

    Latest Incidents

    Hackers Target Amazon’s AI Code Bot

    APTs Use Fake Dalai Lama Apps to Spy

    Infostealer Hidden in Steam Game

    Data Breach Affects 340K Jobseekers

    Hackers Use Ransomware on SharePoint Servers

    Beluga Vodka Ransomware Attack Reported

    CyberMaterial Logo
    • About Us
    • Contact Us
    • Jobs
    • Legal and Privacy Policy
    • Site Map

    © 2025 | CyberMaterial | All rights reserved

    Welcome Back!

    Login to your account below

    Forgotten Password?

    Retrieve your password

    Please enter your username or email address to reset your password.

    Log In

    Add New Playlist

    No Result
    View All Result
    • Alerts
    • Incidents
    • News
    • Cyber Decoded
    • Cyber Hygiene
    • Cyber Review
    • Definitions
    • Malware
    • Cyber Tips
    • Tutorials
    • Advanced Persistent Threats
    • Threat Actors
    • Report an incident
    • Password Generator
    • About Us
    • Contact Us
    • Advertise with us

    Copyright © 2025 CyberMaterial