Trojan-Downloader:W32/Agent.FDS

Classification

Malware

Trojan-Downloader

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Trojan-Downloader:W32/Agent.FDS

Summary

This malware may arrive in the system as a dropped file of other trojan installation packages or may be downloaded from the Internet. When running, this malware will download and execute another trojan in the infected system.

Removal

Automatic action

Based on the settings of your F-Secure security product, it will either move the file to the quarantine where it cannot spread or cause harm, or remove it.

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Submit a sample

Submit a file or URL for further analysis.

Technical Details

On execution, it will initially check to determine if it is running within a virtual machine and exits if this has been satisfied.It will also attempt to disable the computer's System Restore before creating its own copy to avoid the machine being reverted back to a clean state.A modified copy of itself is then created in window's system directory (usually c:\windows\system32) using any of the following filenames:

  • csr[Random].exe
  • ctf[Random].exe
  • drv[Random].exe
  • dsk[Random].exe
  • hlp[Random].exe
  • lsa[Random].exe
  • man[Random].exe
  • mod[Random].exe
  • mon[Random].exe
  • net[Random].exe
  • sql[Random].exe
  • svc[Random].exe
  • sys[Random].exe
  • tsk[Random].exe
  • upd[Random].exe
  • win[Random].exe

It then sets its security attributes to enable only "Traverse Folders / Execute File" (Effective Permissions), thus preventing the user from easily deleting the malware file from the system.If an Internet connection is detected, the malware then downloads and execute another file from:

  • hzzxhngnh.ws
  • rm6ojqab7.info

It downloads to the computer's temporary folder. As of testing however, the said domains are no longer active.

Date Created: -

Date Last Modified: -