Technical Information
Malicious functions
To complicate detection of its presence in the operating system,
forces the system hide from view:
- hidden files
Creates and executes the following
- '' (downloaded from the Internet)
Creates and executes the following (exploit)
- '%APPDATA%\mrdtnw25394.exe'
Injects code into
the following system processes:
- %WINDIR%\microsoft.net\framework\v2.0.50727\vbc.exe
the following user processes:
- mrdnie.exe
Searches for registry branches where third party applications store passwords
- [<HKCU>\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts]
- [<HKCU>\Identities\{91255D00-95D9-49F5-8E84-7C027F5283B7}\Software\Microsoft\Internet Account Manager\Accounts]
- [<HKCU>\Identities\{91255D00-95D9-49F5-8E84-7C027F5283B7}\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts]
- [<HKCU>\Software\Microsoft\MSNMessenger]
- [<HKCU>\Software\Yahoo\Pager]
- [<HKCU>\Software\Microsoft\IdentityCRL]
- [<HKCU>\Software\Microsoft\Windows Live Mail]
Reads files which store third party applications passwords
- %APPDATA%\mozilla\firefox\profiles.ini
- %LOCALAPPDATA%\google\chrome\user data\default\web data
- %LOCALAPPDATA%\google\chrome\user data\default\login data
Modifies file system
Creates the following files
- %APPDATA%\mrdtnw25394.exe
- %APPDATA%\mrdnwo\mrdnie.exe
- %APPDATA%\mrdnwo\mrdnie.exe:zoneidentifier
- %APPDATA%\pid.txt
- %APPDATA%\pidloc.txt
- %PROGRAMDATA%\microsoft\vault\ac658cb4-9126-49bd-b877-31eedab3f204\policy.vpol
- %PROGRAMDATA%\microsoft\vault\ac658cb4-9126-49bd-b877-31eedab3f204\3ccd5499-87a8-4b10-a215-608888dd3b55.vsch
- %PROGRAMDATA%\microsoft\vault\ac658cb4-9126-49bd-b877-31eedab3f204\2f1a6504-0641-44cf-8bb5-3612d865f2e5.vsch
- %LOCALAPPDATA%\microsoft\vault\4bf4c442-9b8a-41a0-b380-dd4a704ddb28\policy.vpol
- %TEMP%\holderwb.txt
Deletes the following files
- %TEMP%\holderwb.txt
Network activity
TCP
HTTP GET requests
- http://mo###courier.eu/mrdfile/mrdfile.exe
- http://wh#####yipaddress.com/
UDP
- DNS ASK mo###courier.eu
- DNS ASK wh#####yipaddress.com
- DNS ASK sm##.#eportlog.top
Miscellaneous
Creates and executes the following
- '%APPDATA%\mrdnwo\mrdnie.exe'
Executes the following
- '%CommonProgramFiles%\microsoft shared\equation\eqnedt32.exe' -Embedding
- '%WINDIR%\microsoft.net\framework\v2.0.50727\vbc.exe' /stext "%TEMP%\holdermail.txt"
- '%WINDIR%\microsoft.net\framework\v2.0.50727\vbc.exe' /stext "%TEMP%\holderwb.txt"
