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Monitoring.BlockHome Analysis Report
Threat Submitted On: 12/11/2007 6:53:50 AM
Threat Analysed On: 12/11/2007 11:53:50 AM
Threat Updated On: 1/27/2011 10:13:37 PM
Type : Monitoring
Symptoms of BlockHome
  • Capture the activities performed by the user on a system
  • Captured information is sent to the intruder.
  • The intruder can access the compromised machine at real-time.
Alias : Monitoring.BlockHome
Md5 Hash : [ea47af8e09f829230220f351a3e4815b]
File Size : (2104429 bytes)

Technical Details

Here are the Technical findings of our analysis team after analyzing this malware in detail :-

Creates the following infected Files on user's System
Delete the following Files to remove Infection
File: block.dll
Path : %allusersprofile%\application data\codewise\block

Md5Hash :1ef1cdc3d0027511cb0937916cec3975 ( 182272 bytes)
File: csrss.exe
Path : %allusersprofile%\application data\csrss

Md5Hash :0d9e2a73c918810bd788618af107eb8e ( 518144 bytes)
File: block.exe
Path : %programfiles%\blockhome

Md5Hash :6bbf96ece3aa390e251ab3843becca68 ( 2432000 bytes)
File: blocklsp.dll
Path : %windir%\system32

Md5Hash :b16b2c5740ca808f737b298426a2434f ( 110592 bytes)
File: [randomname].exe
Path : %workingdir%

Md5Hash :ea47af8e09f829230220f351a3e4815b ( 2104429 bytes)
Also creates the following files on user's System which are also created by Genuine Software :-
These file(s) can be kept as they are also created by genuine Software.
File : instlsp.exe
Path : %windir%\system32

Md5Hash :8900de6b6633471b4a51871952e5acef ( 36864 bytes)
Creates the following child process(s) on execution:


%systemdrive%\temp\nssc.tmp\ns3b.tmp %windir%\system32\instlsp.exe -w

%windir%\system32\instlsp.exe -w

Creates the Following MUTEX(s) on user's System:-
Copies the Following Files to Given Location :-

Copies :%systemdrive%\temp\nssc.tmp\nsexec.dll

To : %systemdrive%\temp\nssc.tmp\ns3b.tmp


1. %allusersprofile% Refers to the windows all users profile folder. By default it is 'C:\Documents and Settings\All Users'
2. %programfiles% Refers to the program files folder. By default it is 'C:\Program Files'
3. %windir% Refers to the windows root folder. By default it is 'C:\Windows'
4. %workingdir% Refers to the current directory in which user is working.

Important: We strongly recommend that you backup the Registry before making any changes to it. Incorrect changes to the Registry can result in permanent data loss or corrupted Files. Modify the malicious\suspicious Subkeys only.

Click Here for more recommended PC Security and Optimization Tools

To modify registry entries in Windows Operating System:
Follow Steps:
1. Click Start > Run
2. Type “regedit” : to open registry editor
3. Navigate to required registry Key from the Left Tree control and modify accordingly.

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