Virus Profile: Downloader-CUU.gen.f

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Virus Profile information details
Risk Assessment: Home Low | Corporate Low
Date Discovered: 8/1/2012
Date Added: 8/1/2012
Origin: Unknown
Length: Varies
Type: Trojan
Subtype: Generic
DAT Required: 6802
Removal Instructions


This is a Trojan detection. Unlike viruses, trojans do not self-replicate. They are spread manually, often under the premise that they are beneficial or wanted. The most common installation methods involve system or security exploitation, and unsuspecting users manually executing unknown programs. Distribution channels include email, malicious or hacked web pages, Internet Relay Chat (IRC), peer-to-peer networks, etc.


  • Microsoft    -    TrojanDownloader:Win32/Karagany.I
  • Symantec    -    Trojan.Gen
  • Nod32        -    Win32/TrojanDownloader.Vespula.AY trojan
  • Kaspersky    -    Trojan-Downloader.Win32.Plosa.jcu

Indication of Infection

Presence of above mentioned files and registry activities.
Presence of above mentioned Network connections.

Methods of Infection

Trojans do not self-replicate. They are spread manually, often under the premise that the executable is something beneficial. Distribution channels include IRC, peer-to-peer networks, newsgroup postings, email spam, etc.

Virus Characteristics

Downloader-CUU.gen.f ”  is detection for this Trojan which downloads the other payloads from malicious websites. It may allow the attackers to get into and carry out dangerous actions in the infected computers. It may also download FakeAV.

Upon execution the Trojan tries to connect to the following IP Address through a remote port http to download other payloads

  • hxxp://
The following are the files dropped by the Trojan to the system:

  • %Temp%\~!#E.tmp
  • %Temp%\~!#10.tmp
  • %Temp%\~!#11.tmp
  • %Temp%\~!#12.tmp
The Trojan creates Mutex in the following name:

  • yUo9Ck1Io

All Users:
Use current engine and DAT files for detection and removal.

Modifications made to the system Registry and/or INI files for the purposes of hooking system startup, will be successfully removed if cleaning with the recommended engine and DAT combination (or higher).


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