MD5: 6d7e11d0674934ad60805739c11a074c
SHA1: 2bcee7f42a716a9ccbab138084e457b0ea9ee145
SHA256: 3b5393a7598673fbd7f6c61e7a45f0f7edf8b37ea6900e87bc8dd3efec0ac95a
SSDeep: 24576:rRmJkcoQricOIQxiZY1iaXf/pV9u54LYcRFAoc8:oJZoQrbTFZY1iaXfRfLNR2oh
Size: 1115448 bytes
File type: EXE
Platform: WIN32
Entropy: Packed
PEID: UPolyXv05_v6
Company: no certificate found
Created at: 2012-01-29 23:32:28
Analyzed on: WindowsXP SP3 32-bit

Summary:

Worm. A program that is primarily replicating on networks or removable drives.

Payload

No specific payload has been found.

Process activity

The Worm creates the following process(es):

svshost.exe:456
Reader_sl.exe:1064
wuauclt.exe:344
ipconfig.exe:240
ipconfig.exe:480
%original file name%.exe:1480
jusched.exe:1056

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

sqlwriter.exe:1164

File activity

The process svshost.exe:456 makes changes in the file system.
The Worm creates and/or writes to the following file(s):

%Documents and Settings%\%current user%\Local Settings\Temp\sqlwriter.exe (10 bytes)

The process wuauclt.exe:344 makes changes in the file system.
The Worm creates and/or writes to the following file(s):

%WinDir%\SoftwareDistribution\DataStore\Logs\edb.chk (100 bytes)
%WinDir%\SoftwareDistribution\DataStore\Logs\edb.log (3576 bytes)
%WinDir%\SoftwareDistribution\DataStore\DataStore.edb (100 bytes)

The Worm deletes the following file(s):

%WinDir%\SoftwareDistribution\DataStore\Logs\tmp.edb (0 bytes)

The process %original file name%.exe:1480 makes changes in the file system.
The Worm creates and/or writes to the following file(s):

%Documents and Settings%\%current user%\Local Settings\Temp\svshost.exe (22641 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\TMP654.dll (41 bytes)
C:\System.exe (7547 bytes)
%System%\drivers\etc\hosts (887 bytes)
%Documents and Settings%\%current user%\Application Data\check.txt (5 bytes)

The Worm deletes the following file(s):

%Documents and Settings%\%current user%\Local Settings\Temp\svshost.exe (0 bytes)

The process jusched.exe:1056 makes changes in the file system.
The Worm creates and/or writes to the following file(s):

%Documents and Settings%\%current user%\Local Settings\Temp\jusched.log (347 bytes)

Registry activity

The process svshost.exe:456 makes changes in the system registry.
The Worm creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "78 EE C3 86 76 8C 48 25 9E 60 CA 91 F1 A9 10 0A"

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

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

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

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

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

To automatically run itself each time Windows is booted, the Worm adds the following link to its file to the system registry autorun key:

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]
"MicroSoftUpdate" = "C:\DOCUME~1\"%CurrentUserName%"\LOCALS~1\Temp\svshost.exe"

The process Reader_sl.exe:1064 makes changes in the system registry.
The Worm creates and/or sets the following values in system registry:

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

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

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

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

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

The process sqlwriter.exe:1164 makes changes in the system registry.
The Worm creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "DC C1 23 3D 73 9A BB 0F D4 E4 E0 A5 12 7D 01 EF"

The process ipconfig.exe:240 makes changes in the system registry.
The Worm creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "C4 A3 AF 95 D0 E1 A4 31 39 1B EB 17 35 6E 80 45"

[HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Tracing\Microsoft\eappprxy\traceIdentifier]
"Guid" = "5f31090b-d990-4e91-b16d-46121d0255aa"

[HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Tracing\Microsoft\QUtil\traceIdentifier]
"Guid" = "8aefce96-4618-42ff-a057-3536aa78233e"

[HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Tracing\Microsoft\eappprxy]
"Active" = "1"

[HKLM\System\CurrentControlSet\Services\Eventlog\Application\ESENT]
"CategoryMessageFile" = "%System%\ESENT.dll"
"EventMessageFile" = "%System%\ESENT.dll"

[HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Tracing\Microsoft\eappcfg\traceIdentifier]
"BitNames" = " Error Unusual Info Debug"

[HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Tracing\Microsoft\eappcfg]
"Active" = "1"

[HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Tracing\Microsoft\QUtil]
"Active" = "1"
"ControlFlags" = "1"

[HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Tracing\Microsoft\QUtil\traceIdentifier]
"BitNames" = " Error Unusual Info Debug"

[HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Tracing\Microsoft\eappprxy\traceIdentifier]
"BitNames" = " Error Unusual Info Debug"

[HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Tracing\Microsoft\eappprxy]
"LogSessionName" = "stdout"

[HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Tracing\Microsoft\QUtil]
"LogSessionName" = "stdout"

[HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Tracing\Microsoft\eappcfg\traceIdentifier]
"Guid" = "5f31090b-d990-4e91-b16d-46121d0255aa"

[HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Tracing\Microsoft\eappcfg]
"ControlFlags" = "1"

[HKLM\System\CurrentControlSet\Services\Eventlog\Application\ESENT]
"CategoryCount" = "16"
"TypesSupported" = "7"

[HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Tracing\Microsoft\eappcfg]
"LogSessionName" = "stdout"

[HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Tracing\Microsoft\eappprxy]
"ControlFlags" = "1"

The process ipconfig.exe:480 makes changes in the system registry.
The Worm creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "FE 11 B3 EB C8 FD 6F D7 13 15 44 34 A4 24 48 C3"

[HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Tracing\Microsoft\eappprxy\traceIdentifier]
"Guid" = "5f31090b-d990-4e91-b16d-46121d0255aa"

[HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Tracing\Microsoft\QUtil\traceIdentifier]
"Guid" = "8aefce96-4618-42ff-a057-3536aa78233e"

[HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Tracing\Microsoft\eappprxy]
"Active" = "1"

[HKLM\System\CurrentControlSet\Services\Eventlog\Application\ESENT]
"CategoryMessageFile" = "%System%\ESENT.dll"
"EventMessageFile" = "%System%\ESENT.dll"

[HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Tracing\Microsoft\eappcfg\traceIdentifier]
"BitNames" = " Error Unusual Info Debug"

[HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Tracing\Microsoft\eappcfg]
"Active" = "1"

[HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Tracing\Microsoft\QUtil]
"Active" = "1"
"ControlFlags" = "1"

[HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Tracing\Microsoft\QUtil\traceIdentifier]
"BitNames" = " Error Unusual Info Debug"

[HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Tracing\Microsoft\eappprxy\traceIdentifier]
"BitNames" = " Error Unusual Info Debug"

[HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Tracing\Microsoft\eappprxy]
"LogSessionName" = "stdout"

[HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Tracing\Microsoft\QUtil]
"LogSessionName" = "stdout"

[HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Tracing\Microsoft\eappcfg\traceIdentifier]
"Guid" = "5f31090b-d990-4e91-b16d-46121d0255aa"

[HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Tracing\Microsoft\eappcfg]
"ControlFlags" = "1"

[HKLM\System\CurrentControlSet\Services\Eventlog\Application\ESENT]
"CategoryCount" = "16"
"TypesSupported" = "7"

[HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Tracing\Microsoft\eappcfg]
"LogSessionName" = "stdout"

[HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Tracing\Microsoft\eappprxy]
"ControlFlags" = "1"

The process %original file name%.exe:1480 makes changes in the system registry.
The Worm creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "E1 42 C1 98 CF 5F 17 4C F4 92 BB FB 55 65 22 01"

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

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

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

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

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

To automatically run itself each time Windows is booted, the Worm adds the following link to its file to the system registry autorun key:

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]
"MicroSoftUpdate" = "C:\DOCUME~1\"%CurrentUserName%"\LOCALS~1\Temp\svshost.exe"

Network activity (URLs)

No activity has been detected.

HOSTS file anomalies

The Worm modifies "%System%\drivers\etc\hosts" file which is used to translate DNS entries to IP addresses.
The modified file is 1192 bytes in size. The following strings are added to the hosts file listed below:

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):
   

   svshost.exe:456
   wuauclt.exe:344
   ipconfig.exe:240
   ipconfig.exe:480
   %original file name%.exe:1480
   

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

   %Documents and Settings%\%current user%\Local Settings\Temp\sqlwriter.exe (10 bytes)
   %WinDir%\SoftwareDistribution\DataStore\Logs\edb.chk (100 bytes)
   %WinDir%\SoftwareDistribution\DataStore\Logs\edb.log (3576 bytes)
   %WinDir%\SoftwareDistribution\DataStore\DataStore.edb (100 bytes)
   %Documents and Settings%\%current user%\Local Settings\Temp\svshost.exe (22641 bytes)
   %Documents and Settings%\%current user%\Local Settings\Temp\TMP654.dll (41 bytes)
   C:\System.exe (7547 bytes)
   %System%\drivers\etc\hosts (887 bytes)
   %Documents and Settings%\%current user%\Application Data\check.txt (5 bytes)
   %Documents and Settings%\%current user%\Local Settings\Temp\jusched.log (347 bytes)

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

   [HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]
   "MicroSoftUpdate" = "C:\DOCUME~1\"%CurrentUserName%"\LOCALS~1\Temp\svshost.exe"
   
   

5. Restore the original content of the HOSTS file (%System%\drivers\etc\hosts):
   127.0.0.1 localhost
   
6. Reboot the computer.
   

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