Threat Description

Trojan-Downloader:​W32/Oficla.AE

Details

Aliases:Trojan-Downloader:​W32/Oficla.AE, Gen:Variant.Bredo.4, Packed.Win32.Krap.an
Category:Malware
Type:Trojan-Downloader
Platform:W32

Summary



A trojan that secretly downloads malicious files from a remote server, then installs and executes the files.



Removal


Automatic action

Once detected, the F-Secure security product will automatically disinfect the suspect file by either deleting it or renaming it.

More

You may wish to refer to the Support Community for further assistance. You also may also refer to General Removal Instructions for a general guide on alternative disinfection actions.



Technical Details



Trojan-Downloader:W32/Oficla.AE is distributed as an attachment to fake e-mail messages; once installed, the trojan-downloader connects to a remote server.

Propagation

Oficla.AE is distributed as executable or zipped files attached to misleading e-mail messages. Some of the most common messages used to deliver this trojan involve fake offers for iTunes Gift certificates or for Amazon.com orders; other attachments are disguised as resumes.The text in the e-mail message entices the unsuspecting user to launch the attached file, which installs and executes the trojan.

Installation

Once the attached executable file is launched, the trojan creates the following files:

  • %Temp%\1.tmp
  • %System%\pgsb.lto

It also makes changes to the Windows Registry to ensure the installed copy is launched when the computer is started up.

Activity

Once installed on the computer, the trojan opens a connection to a remote server, from which it may download additional malicious programs.






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