Tdl4_7366870f2c

Dynamic Analysis

Payload

No specific payload has been found.

Process activity

The Trojan creates the following process(es):

%original file name%.exe:1608

The Trojan injects its code into the following process(es):

spoolsv.exe:1452

File activity

The process %original file name%.exe:1608 makes changes in the file system.

The Trojan creates and/or writes to the following file(s):

%Documents and Settings%\%current user%\Local Settings\Temp\1.tmp (129536 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp (16384 bytes)
C:\ (4096 bytes)

The Trojan deletes the following file(s):

%Documents and Settings%\%current user%\Local Settings\Temp\2.tmp (0 bytes)

The process spoolsv.exe:1452 makes changes in the file system.

The Trojan creates and/or writes to the following file(s):

%Documents and Settings%\%current user%\Local Settings\Temp (4096 bytes)
%WinDir%\Temp\3.tmp (19968 bytes)
%WinDir%\Temp (8192 bytes)

The Trojan deletes the following file(s):

%WinDir%\Temp\3.tmp (0 bytes)

Registry activity

The process %original file name%.exe:1608 makes changes in the system registry.

The Trojan creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "C5 F6 DA 5B 3D 12 01 8A 8B BB 86 64 02 FE 20 9E"

[HKLM\SOFTWARE\Microsoft\DirectDraw\MostRecentApplication]
"ID" = "1288416602"

[HKLM\System\CurrentControlSet\Control\Session Manager]
"PendingFileRenameOperations" = "\??\C:\DOCUME~1\"%CurrentUserName%"\LOCALS~1\Temp\4.tmp,"

[HKLM\SOFTWARE\Microsoft\DirectDraw\MostRecentApplication]
"Name" = "%original file name%.exe"

The process spoolsv.exe:1452 makes changes in the system registry.

The Trojan creates and/or sets the following values in system registry:

[HKLM\System\CurrentControlSet\Control\Print\Providers\hpfypexnvcdtiko]
"Name" = "C:\DOCUME~1\"%CurrentUserName%"\LOCALS~1\Temp\2.tmp"

[HKLM\SOFTWARE\Microsoft\DirectDraw\MostRecentApplication]
"ID" = "1208114401"

[HKLM\System\CurrentControlSet\Control\Session Manager]
"PendingFileRenameOperations" = "\??\C:\DOCUME~1\"%CurrentUserName%"\LOCALS~1\Temp\4.tmp, , \??\%WinDir%\TEMP\5.tmp,"

[HKLM\System\CurrentControlSet\Services\ienwentiniwqvow]
"ImagePath" = "\??\%WinDir%\TEMP\3.tmp"

[HKLM\System\CurrentControlSet\Control\Print\Providers]
"Order" = "LanMan Print Services, Internet Print Provider, hpfypexnvcdtiko"

[HKLM\System\CurrentControlSet\Services\ienwentiniwqvow]
"Type" = "1"

[HKLM\SOFTWARE\Microsoft\DirectDraw\MostRecentApplication]
"Name" = "spoolsv.exe"

The Trojan deletes the following registry key(s):

[HKLM\System\CurrentControlSet\Control\Print\Providers\hpfypexnvcdtiko]
[HKLM\System\CurrentControlSet\Services\ienwentiniwqvow]
[HKLM\System\CurrentControlSet\Services\ienwentiniwqvow\Enum]

Network activity (URLs)

No activity has been detected.

HOSTS file anomalies

No changes have been detected.

Rootkit activity

Using the driver "UNKNOWN" the Trojan controls loading executable images into a memory by installing the Load image notifier.

The Trojan intercepts DriverStartIO in a miniport driver of a hard drive controller (ATAPI) to handle request to its own files:

StartIo

Propagation

Removals

Remove it with Ad-Aware

1. Click (here) to download and install Ad-Aware Free Antivirus.
2. Update the definition files.
3. Run a full scan of your computer.

Manual removal*

1. Scan a system with an anti-rootkit tool.
   
2. Terminate malicious process(es) (How to End a Process With the Task Manager):

   %original file name%.exe:1608
   

3. Delete the original Trojan file.
   
4. Delete or disinfect the following files created/modified by the Trojan:

   %Documents and Settings%\%current user%\Local Settings\Temp\1.tmp (129536 bytes)
   %WinDir%\Temp\3.tmp (19968 bytes)
   

5. Reboot the computer.
   

*Manual removal may cause unexpected system behaviour and should be performed at your own risk.

Static Analysis

Network Activity

Map

Strings from Dumps