Trojan-Dropper:W32/Ambler.D

Classification

Malware

Trojan-Dropper

W32

Trojan-Dropper:W32/Ambler.D, Trojan-Dropper:W32/Ambler.D, Trojan-Dropper.Win32.Agent.absn, TrojanDropper:Win32/Ambler.A (Microsoft)

Summary

This type of trojan contains one or more malicious programs, which it will secretly install and execute.

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.

Find out more

Knowledge Base

Find the latest advice in our Community Knowledge Base.

User Guide

See the user guide for your product on the Help Center.

Contact Support

Chat with or call an expert for help.

Submit a sample

Submit a file or URL for further analysis.

Technical Details

This malware drops a malicious file that steals credentials from Internet banking websites.

Installation

The following component is injected into the iexplorer.exe process:

  • %windir%\system32\svchstb.dll

The injected code is registered as an Internet Explorer Browser Helper Object (BHO). This injected code is the main component file that allows the malware to steal passwords from Internet Explorer's auto-complete passwords cache.The malware also attempts to connect to a remote server and download files:

  • http://vcounter.cn/[...]/cd.php?userid=[random_number]

File System Changes

Creates these files:

  • %windir%\system32\edl.dat
  • %windir%\system32\svchstb.dll
  • %windir%\system32\bb1.dat
  • %windir%\system32\rc.dat
  • %windir%\system32\ps1.dat
  • %windir%\system32\alog.txt

Modified these files:

  • %windir%\system32\alog.txt

Registry Modifications

Sets these values:

  • [HKLM\Software\MRSoft] LN = X]HCX_IOGG
  • [HKLM\Software\MRSoft] CODIGO = lVUVST' T:...':#'"v:VV%#:%T%'.U"'VR .j
  • [HKLM\Software\Classes\CLSID\{ABADC07C-9990-405a-AA24-2C209B50AE79}] @ = Rmn plugin
  • [HKLM\Software\Classes\CLSID\{ABADC07C-9990-405a-AA24-2C209B50AE79}\TypeLib] @ = {0017825A-A697-488f-84AA-b7CEE2A02333}
  • [HKLM\Software\Classes\CLSID\{ABADC07C-9990-405a-AA24-2C209B50AE79}\ProgID] @ = RITLAB.1
  • [HKLM\Software\Classes\CLSID\{ABADC07C-9990-405a-AA24-2C209B50AE79}\InprocServer32] @ = svchstb.dll
  • [HKLM\Software\MRSoft\P] N = [random_number]
  • [HKCU\Software\Microsoft\Internet Explorer\Main] Enable Browser Extensions = yes

Creates these keys:

  • HKLM\Software\MRSoft
  • HKLM\Software\MRSoft\P
  • HKLM\Software\Classes\CLSID\{ABADC07C-9990-405a-AA24-2C209B50AE79}
  • HKLM\Software\Classes\CLSID\{ABADC07C-9990-405a-AA24-2C209B50AE79}\InprocServer32
  • HKLM\Software\Classes\CLSID\{ABADC07C-9990-405a-AA24-2C209B50AE79}\ProgID
  • HKLM\Software\Classes\CLSID\{ABADC07C-9990-405a-AA24-2C209B50AE79}\TypeLib
  • HKLM\Software\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{ABADC07C-9990-405a-AA24-2C209B50AE79}
  • HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\{ABADC07C-9990-405A-AA24-2C209B50AE79}
  • HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\{ABADC07C-9990-405A-AA24-2C209B50AE79}\iexplore

Date Created: -

Date Last Modified: -