Home / malware Trojan-Downloader:W32/Agent.FDS
First posted on 09 November 2007.
Source: SecurityHomeAliases :
Trojan-Downloader:W32/Agent.FDS is also known as Trojan-Downloader.Win32.Agent.FDS.
Explanation :
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.
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:windowssystem32) 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 As of testing however, the said domains are no longer active.
Last update 09 November 2007