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Home > Cybersecurity > Lazarus hackers are using Windows Update for code execution

Lazarus hackers are using Windows Update for code execution

Lazarus hacking group is currently using Windows Update client to deploy the malicious code on the targets.

Rusen Gobel by Rusen Gobel
January 28, 2022
in Cybersecurity
1 min read
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The hacking group Lazarus, which is believed to be backed by North Korea, is now using an interesting technique to run malware on the target computers. The new technique was discovered by the Malwarebytes Threat Intelligence Team as a result of analyzing the campaign.

Don’t open Lockheed Martin related Word files

The malware comes with e-mail, in a Word file, runs with Windows startup, hides behind Windows Update

The Lazarus team is sending e-mails containing Microsoft Word files with the extensions of .doc or .docx. The current campaign impersonates Lockheed Martin where the company announces the job opportunities. The Word files’ names are “Lockheed_Martin_JobOpportunities.docx” and “Salary_Lockheed_Martin_job_opportunities_confidential.doc” to take attention of the victim.

As the user clicks one of those and allows macro execution, the macro creates a WindowsUpdateConf.lnk file in the Windows Startup folder. It also delivers a wuaueng.dll file into the System32 folder. When the .lnk file is run, it launches Windows Update to use the malicious .dll file in the System32 folder. The .lnk file is placed in the Startup folder to be able to start consistently since the files in that folder will run every time Windows starts.

Malwarebytes researchers state that the technique can bypass the security detection mechanisms; In normal circumstances, Windows Update is indeed a trustful source. However, this case shows us that the curiosity of Lockheed Martin’s salaries can make Windows Update a tool for hackers.

Click here to read the full documentation of Malwarebytes for the malware

See more Cyber Security News


Tags: MalwarebytesMicrosoft
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Rusen Gobel

Rusen Gobel

Rusen Gobel is a news editor at Cloud7 News. With more than 10 years of experience, Rusen worked as a hardware and software news editor for technology sites such as Shiftdelete, Teknokolis, Hardware Plus, BT Haber. In addition, Rusen publishes consumer product reviews on his YouTube channel. While consumer electronics has been his main focus for years, now Rusen is more interested in WordPress and software development. He had contributed different web application projects in his professional career. Rusen had graduated from Istanbul University, department of Computer Engineering. Rusen has a very high passion for learning and writing for every kind of technology. That's why he has been working as a tech editor for more than ten years on several different technology magazines and online news portals.

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