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 Alerts

Lazarus Group Targets IIS Servers

May 30, 2023
Reading Time: 2 mins read
in Alerts
Lazarus Group Targets IIS Servers

 

The Lazarus Group, a state-backed hacking group linked to North Korea, has been identified targeting vulnerable Windows Internet Information Services (IIS) web servers as part of their cyber espionage and financial motivation activities.

South Korean researchers at AhnLab Security Emergency Response Center (ASEC) discovered this latest tactic, which allows the group to gain initial access to corporate networks. IIS servers, commonly used by organizations for hosting web content, can act as entry points if poorly managed or outdated.

Lazarus exploits known vulnerabilities or misconfigurations in IIS servers, using DLL sideloading techniques to execute their attacks and avoid detection by antivirus tools. They drop legitimate files and encoded files on the servers, leveraging them to launch malicious code and gain control.

The initial stage of Lazarus’ attack involves creating files on IIS servers using the w3wp.exe process, including a legitimate file, ‘Wordconv.exe,’ and a malicious DLL, ‘msvcr100.dll.’ These files are used to decrypt and execute the malicious payload in memory, evading antivirus detection.

The researchers at ASEC have found similarities between ‘msvcr100.dll’ and a previously observed malware used by Lazarus, suggesting a new variant of the same malware. In the second phase, Lazarus exploits a Notepad++ plugin to create another malware, ‘diagn.dll,’ which decrypts and executes a payload encoded with the RC6 algorithm. Although the exact purpose of this payload is unknown, evidence points to credential theft activities.

During their attack, Lazarus performs network reconnaissance and lateral movement, using valid user credentials likely obtained in the previous step. Port 3389 (Remote Desktop) is commonly exploited for lateral movement.

However, ASEC has not identified any further malicious activities following the lateral spread on the network. Given Lazarus’ reliance on DLL sideloading, ASEC advises organizations to monitor abnormal process execution to detect and prevent the group from carrying out activities such as information exfiltration and lateral movement.

This discovery sheds light on the evolving tactics of the Lazarus Group and highlights the importance of maintaining strong security measures, particularly for IIS servers, to defend against advanced cyber threats.

Reference:
  • Lazarus Group Targeting Windows IIS Web Servers
Tags: Cyber AlertCyber Alerts 2023Lazarus groupMay 2023North KoreaVulnerabilitiesWindows
ADVERTISEMENT

Related Posts

Glibc Flaw Gives Linux Root Access Risk

Mozilla Urgent Firefox Patch Fixes RCE Flaws

May 19, 2025
Fileless Remcos RAT Delivery Via LNK Files

ModiLoader Malware Targets Windows Users

May 19, 2025
Glibc Flaw Gives Linux Root Access Risk

Glibc Flaw Gives Linux Root Access Risk

May 19, 2025
Fileless Remcos RAT Delivery Via LNK Files

APT28 RoundPress Webmail Hack Steals Emails

May 16, 2025
Fileless Remcos RAT Delivery Via LNK Files

FBI Warns of AI Voice Phishing Scams

May 16, 2025
Fileless Remcos RAT Delivery Via LNK Files

Fileless Remcos RAT Delivery Via LNK Files

May 16, 2025

Latest Alerts

Mozilla Urgent Firefox Patch Fixes RCE Flaws

ModiLoader Malware Targets Windows Users

Glibc Flaw Gives Linux Root Access Risk

Fileless Remcos RAT Delivery Via LNK Files

FBI Warns of AI Voice Phishing Scams

APT28 RoundPress Webmail Hack Steals Emails

Subscribe to our newsletter

    Latest Incidents

    Massive DDoS Hits Poland’s Civic Platform

    Arla Plant Cyberattack Halts Operations

    Georgia’s Harbin Clinic Hit by Data Breach

    Hackers Target Swiss Reserve Power Plant

    Coinbase Insider Attack Exposed User Data

    Cyberattack Hits J Batista Group

    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