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

Coinbase Insider Attack Exposed User Data

Coinbase Insider Attack Exposed User Data

May 16, 2025
Coinbase Insider Attack Exposed User Data

Hackers Target Swiss Reserve Power Plant

May 16, 2025
Coinbase Insider Attack Exposed User Data

Cyberattack Hits J Batista Group

May 16, 2025
Dior Breach Exposes Asian Customer Data

Dior Breach Exposes Asian Customer Data

May 15, 2025
Dior Breach Exposes Asian Customer Data

Australian Human Rights Body Files Leaked

May 15, 2025
Dior Breach Exposes Asian Customer Data

Nucor Cyberattack Halts Plants Networks

May 15, 2025

Latest Alerts

Fileless Remcos RAT Delivery Via LNK Files

FBI Warns of AI Voice Phishing Scams

APT28 RoundPress Webmail Hack Steals Emails

Google Patches Chrome Account Takeover Bug

Horabot Malware Targets LatAm Via Phishing

HTTPBot DDoS Threat To Windows Systems

Subscribe to our newsletter

    Latest Incidents

    Hackers Target Swiss Reserve Power Plant

    Coinbase Insider Attack Exposed User Data

    Cyberattack Hits J Batista Group

    Dior Breach Exposes Asian Customer Data

    Australian Human Rights Body Files Leaked

    Nucor Cyberattack Halts Plants Networks

    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