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TrojanDownloader:MSIL/BrobanDel.B


First posted on 04 May 2015.
Source: Microsoft

Aliases :

There are no other names known for TrojanDownloader:MSIL/BrobanDel.B.

Explanation :

Threat behavior

Installation
This threat can create files on your PC, including:

  • %SystemRoot%\gbclass2.dll
  • %TEMP%\a.dll


It modifies the registry so that it runs each time you start your PC. For example:

In subkey: HKLM\software\microsoft\windows\currentversion\run
Sets value: "internet"
With data: "explorer c:\"


It can make various registry changes during its installation, including:

In subkey: HKCU\software\classes\clsid

Sets value: "(default)"
With data: "plugin.flashplayer"

In subkey: HKLM\software\classes\clsid\inprocserver32

Sets value: "(default)"
With data: "%SystemRoot%\gbclass2.dll"

In subkey: HKLM\software\classes\clsid

Sets value: "(default)"
With data: "plugin.flashplayer"



Payload


Downloads malware or unwanted software

This threat can download other malware and unwanted software onto your PC.



Connects to a remote host

We have seen this threat connect to a remote host, including:
  • ge.tt using port 80
Malware can connect to a remote host to do any of the following:
  • Check for an Internet connection
  • Download and run files (including updates or other malware)
  • Report a new infection to its author
  • Receive configuration or other data
  • Receive instructions from a malicious hacker
  • Search for your PC location
  • Upload information taken from your PC
  • Validate a digital certificate


This malware description was published using automated analysis of file SHA1 15cb98e24abb5107288c605d4dd4a971e12eac39.

Symptoms

The following can indicate that you have this threat on your PC:

  • You see a file similar to:
    • %SystemRoot%\gbclass2.dll
    • %TEMP%\a.dll
  • You see registry modifications such as:
    • In subkey: HKCU\software\classes\clsid
      Sets value: "(default)"
      With data: "plugin.flashplayer"

    • In subkey: HKLM\software\classes\clsid\inprocserver32
      Sets value: "(default)"
      With data: "%SystemRoot%\gbclass2.dll"

    • In subkey: HKLM\software\classes\clsid
      Sets value: "(default)"
      With data: "plugin.flashplayer"

    • In subkey: HKLM\software\microsoft\windows\currentversion\run
      Sets value: "internet"
      With data: "explorer c:\"

Last update 04 May 2015

 

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