Trojan-Dropper.Win32.GoogleTool_06ecb99836

by malwarelabrobot on November 29th, 2013 in Malware Descriptions.

Trojan-Dropper.Win32.GoogleTool (Lavasoft MAS)
Behaviour: Trojan-Dropper


The description has been automatically generated by Lavasoft Malware Analysis System and it may contain incomplete or inaccurate information.

Summary
Technical Details
Removal Recommendations

MD5: 06ecb99836c510701887b7331db11a46
SHA1: 4f87105550290651731ec742a5a421aa081590e8
SHA256: 3bd45aa56781f132e47247bfa4b5412cf110e8e51eaa013a2628b8e5072b0126
SSDeep: 6144:qrQKBhWR0Jj4VB13kQBYDl7 nS/OT5euTlHG:WQKBhWRfTXYDN nsc7l
Size: 346624 bytes
File type: EXE
Platform: WIN32
Entropy: Not Packed
PEID: UPolyXv05_v6
Company: no certificate found
Created at: 2013-10-25 05:52:12


Summary:

Trojan-Dropper. Trojan program, intended for stealth installation of other malware into user's system.

Payload

No specific payload has been found.

Process activity

The Trojan-Dropper creates the following process(es):

%original file name%.exe:880
GoogleTool.exe:1564
rundll32.exe:844

File activity

The process %original file name%.exe:880 makes changes in the file system.
The Trojan-Dropper creates and/or writes to the following file(s):

%Documents and Settings%\%current user%\Templates\Goopdate.dll (44 bytes)
%Documents and Settings%\%current user%\Templates\Noew.SAM (143 bytes)
%Documents and Settings%\%current user%\Templates\GoogleTool.exe (116 bytes)
%Documents and Settings%\%current user%\Start Menu\Windows Message.lnk (668 bytes)

The Trojan-Dropper deletes the following file(s):

%Documents and Settings%\%current user%\Start Menu\Windows Message.lnk (0 bytes)

Registry activity

The process %original file name%.exe:880 makes changes in the system registry.
The Trojan-Dropper creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "F6 6C 15 42 47 00 07 BC ED 23 0D EC DB D8 9D 16"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{c155cd73-744b-11e2-8294-806d6172696f}]
"BaseClass" = "Drive"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"Common Documents" = "%Documents and Settings%\All Users\Documents"
"CommonVideo" = "%Documents and Settings%\All Users\Documents\My Videos"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"Desktop" = "%Documents and Settings%\%current user%\Desktop"
"My Pictures" = "%Documents and Settings%\%current user%\My Documents\My Pictures"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{c155cd72-744b-11e2-8294-806d6172696f}]
"BaseClass" = "Drive"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"Common AppData" = "%Documents and Settings%\All Users\Application Data"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{b98117e8-75ca-11e2-81b2-000c293708fb}]
"BaseClass" = "Drive"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"CommonMusic" = "%Documents and Settings%\All Users\Documents\My Music"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"AppData" = "%Documents and Settings%\%current user%\Application Data"
"Templates" = "%Documents and Settings%\%current user%\Templates"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{c155cd75-744b-11e2-8294-806d6172696f}]
"BaseClass" = "Drive"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"Common Start Menu" = "%Documents and Settings%\All Users\Start Menu"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"Start Menu" = "%Documents and Settings%\%current user%\Start Menu"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"Common Desktop" = "%Documents and Settings%\All Users\Desktop"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"Personal" = "%Documents and Settings%\%current user%\My Documents"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"CommonPictures" = "%Documents and Settings%\All Users\Documents\My Pictures"

The process GoogleTool.exe:1564 makes changes in the system registry.
The Trojan-Dropper creates and/or sets the following values in system registry:
To automatically run itself each time Windows is booted, the Trojan-Dropper adds the following link to its file to the system registry autorun key:

[HKCU\Software\Microsoft\Windows\CurrentVersion\Run]
"Microsoft" = "%Documents and Settings%\%current user%\Templates\GoogleTool.exe"

The process rundll32.exe:844 makes changes in the system registry.
The Trojan-Dropper creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "3B DE 0D 9F 6F 88 F8 E6 05 A0 C6 38 87 CC C7 69"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"Templates" = "%Documents and Settings%\%current user%\Templates"

Network activity (URLs)

No activity has been detected.

HOSTS file anomalies

No changes have been detected.

Rootkit activity

No anomalies have been detected.

Propagation


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. Terminate malicious process(es) (How to End a Process With the Task Manager):

    %original file name%.exe:880
    GoogleTool.exe:1564
    rundll32.exe:844

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

    %Documents and Settings%\%current user%\Templates\Goopdate.dll (44 bytes)
    %Documents and Settings%\%current user%\Templates\Noew.SAM (143 bytes)
    %Documents and Settings%\%current user%\Templates\GoogleTool.exe (116 bytes)
    %Documents and Settings%\%current user%\Start Menu\Windows Message.lnk (668 bytes)

  4. Delete the following value(s) in the autorun key (How to Work with System Registry):

    [HKCU\Software\Microsoft\Windows\CurrentVersion\Run]
    "Microsoft" = "%Documents and Settings%\%current user%\Templates\GoogleTool.exe"

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