PLATFORM:

Windows 2000, Windows XP, Windows Server 2003

 OVERALL RISK RATING:
 DAMAGE POTENTIAL:
 DISTRIBUTION POTENTIAL:
 REPORTED INFECTION:

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

This Trojan arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

  TECHNICAL DETAILS

File Size: 27,648 bytes
File Type: EXE
Memory Resident: Yes
Initial Samples Received Date: 21 Nov 2013

Arrival Details

This Trojan arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

Installation

This Trojan drops the following copies of itself into the affected system:

  • %User Temp%\SCV.exe

(Note: %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Local\Temp on Windows Vista and 7.)

Autostart Technique

This Trojan adds the following registry entries to enable its automatic execution at every system startup:

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
scv.exe = "%User Temp%\scv.exe"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Run
scv.exe = "%User Temp%\scv.exe"

Other System Modifications

This Trojan deletes the following files:

  • %Windows%\Microsoft.NET\Framework\v2.0.50727\config\security.config.cch.696.129171
  • %Windows%\Microsoft.NET\Framework\v2.0.50727\config\enterprisesec.config.cch.696.129468
  • %User Profile%\v2.0.50727.42\security.config.cch.696.131281

(Note: %Windows% is the Windows folder, which is usually C:\Windows.. %User Profile% is the current user's profile folder, which is usually C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003, or C:\Users\{user name} on Windows Vista and 7.)

It adds the following registry keys:

HKEY_CLASSES_ROOT\nj.D

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
nj.D\CLSID

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{D79F0736-B62D-37B8-A2C0-FB76C6F0D84C}

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{D79F0736-B62D-37B8-A2C0-FB76C6F0D84C}\InprocServer32

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{D79F0736-B62D-37B8-A2C0-FB76C6F0D84C}\InprocServer32\
0.0.0.0

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{D79F0736-B62D-37B8-A2C0-FB76C6F0D84C}\ProgId

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{D79F0736-B62D-37B8-A2C0-FB76C6F0D84C}\Implemented Categories

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{D79F0736-B62D-37B8-A2C0-FB76C6F0D84C}\Implemented Categories\
{62C8FE65-4EBB-45e7-B440-6E39B2CDBF29}

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Component Categories\{62C8FE65-4EBB-45e7-B440-6E39B2CDBF29}

HKEY_CLASSES_ROOT\nj.a

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
nj.a\CLSID

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{368080B9-32F7-357B-B491-F5239DA91118}

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{368080B9-32F7-357B-B491-F5239DA91118}\InprocServer32

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{368080B9-32F7-357B-B491-F5239DA91118}\InprocServer32\
0.0.0.0

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{368080B9-32F7-357B-B491-F5239DA91118}\ProgId

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{368080B9-32F7-357B-B491-F5239DA91118}\Implemented Categories

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{368080B9-32F7-357B-B491-F5239DA91118}\Implemented Categories\
{62C8FE65-4EBB-45e7-B440-6E39B2CDBF29}

HKEY_CLASSES_ROOT\nj.W

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
nj.W\CLSID

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{21D15CCB-5259-3F4D-A11C-131A0BD0EBF4}

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{21D15CCB-5259-3F4D-A11C-131A0BD0EBF4}\InprocServer32

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{21D15CCB-5259-3F4D-A11C-131A0BD0EBF4}\InprocServer32\
0.0.0.0

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{21D15CCB-5259-3F4D-A11C-131A0BD0EBF4}\ProgId

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{21D15CCB-5259-3F4D-A11C-131A0BD0EBF4}\Implemented Categories

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{21D15CCB-5259-3F4D-A11C-131A0BD0EBF4}\Implemented Categories\
{62C8FE65-4EBB-45e7-B440-6E39B2CDBF29}

It adds the following registry entries:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\policies\
system
EnableLUA = "0"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{D79F0736-B62D-37B8-A2C0-FB76C6F0D84C}\InprocServer32
ThreadingModel = "Both"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{D79F0736-B62D-37B8-A2C0-FB76C6F0D84C}\InprocServer32
Class = "nj.D"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{D79F0736-B62D-37B8-A2C0-FB76C6F0D84C}\InprocServer32
Assembly = "nj, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{D79F0736-B62D-37B8-A2C0-FB76C6F0D84C}\InprocServer32
RuntimeVersion = "v2.0.50727"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{D79F0736-B62D-37B8-A2C0-FB76C6F0D84C}\InprocServer32
CodeBase = "file:///%System Root%/DOCUME~1/Wilbert/LOCALS~1/Temp/SCV.exe"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{D79F0736-B62D-37B8-A2C0-FB76C6F0D84C}\InprocServer32\
0.0.0.0
Class = "nj.D"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{D79F0736-B62D-37B8-A2C0-FB76C6F0D84C}\InprocServer32\
0.0.0.0
Assembly = "nj, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{D79F0736-B62D-37B8-A2C0-FB76C6F0D84C}\InprocServer32\
0.0.0.0
RuntimeVersion = "v2.0.50727"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{D79F0736-B62D-37B8-A2C0-FB76C6F0D84C}\InprocServer32\
0.0.0.0
CodeBase = "file:///%System Root%/DOCUME~1/Wilbert/LOCALS~1/Temp/SCV.exe"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Component Categories\{62C8FE65-4EBB-45e7-B440-6E39B2CDBF29}
0 = ".NET Category"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{368080B9-32F7-357B-B491-F5239DA91118}\InprocServer32
ThreadingModel = "Both"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{368080B9-32F7-357B-B491-F5239DA91118}\InprocServer32
Class = "nj.a"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{368080B9-32F7-357B-B491-F5239DA91118}\InprocServer32
Assembly = "nj, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{368080B9-32F7-357B-B491-F5239DA91118}\InprocServer32
RuntimeVersion = "v2.0.50727"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{368080B9-32F7-357B-B491-F5239DA91118}\InprocServer32
CodeBase = "file:///%System Root%/DOCUME~1/Wilbert/LOCALS~1/Temp/SCV.exe"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{368080B9-32F7-357B-B491-F5239DA91118}\InprocServer32\
0.0.0.0
Class = "nj.a"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{368080B9-32F7-357B-B491-F5239DA91118}\InprocServer32\
0.0.0.0
Assembly = "nj, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{368080B9-32F7-357B-B491-F5239DA91118}\InprocServer32\
0.0.0.0
RuntimeVersion = "v2.0.50727"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{368080B9-32F7-357B-B491-F5239DA91118}\InprocServer32\
0.0.0.0
CodeBase = "file:///%System Root%/DOCUME~1/Wilbert/LOCALS~1/Temp/SCV.exe"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{21D15CCB-5259-3F4D-A11C-131A0BD0EBF4}\InprocServer32
ThreadingModel = "Both"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{21D15CCB-5259-3F4D-A11C-131A0BD0EBF4}\InprocServer32
Class = "nj.W"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{21D15CCB-5259-3F4D-A11C-131A0BD0EBF4}\InprocServer32
Assembly = "nj, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{21D15CCB-5259-3F4D-A11C-131A0BD0EBF4}\InprocServer32
RuntimeVersion = "v2.0.50727"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{21D15CCB-5259-3F4D-A11C-131A0BD0EBF4}\InprocServer32
CodeBase = "file:///%System Root%/DOCUME~1/Wilbert/LOCALS~1/Temp/SCV.exe"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{21D15CCB-5259-3F4D-A11C-131A0BD0EBF4}\InprocServer32\
0.0.0.0
Class = "nj.W"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{21D15CCB-5259-3F4D-A11C-131A0BD0EBF4}\InprocServer32\
0.0.0.0
Assembly = "nj, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{21D15CCB-5259-3F4D-A11C-131A0BD0EBF4}\InprocServer32\
0.0.0.0
RuntimeVersion = "v2.0.50727"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{21D15CCB-5259-3F4D-A11C-131A0BD0EBF4}\InprocServer32\
0.0.0.0
CodeBase = "file:///%System Root%/DOCUME~1/Wilbert/LOCALS~1/Temp/SCV.exe"

HKEY_CURRENT_USER
Nj = "2013-7-4"

Dropping Routine

This Trojan drops the following files:

  • %User Temp%\scv.vbe
  • %User Startup%\scv.exe

(Note: %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Local\Temp on Windows Vista and 7.. %User Startup% is the current user's Startup folder, which is usually C:\Windows\Profiles\{user name}\Start Menu\Programs\Startup on Windows 98 and ME, C:\WINNT\Profiles\{user name}\Start Menu\Programs\Startup on Windows NT, and C:\Documents and Settings\{User name}\Start Menu\Programs\Startup.)

This report is generated via an automated analysis system.

  SOLUTION

Minimum Scan Engine: 9.300

Step 1

Before doing any scans, Windows XP, Windows Vista, and Windows 7 users must disable System Restore to allow full scanning of their computers.

Step 2

Restart in Safe Mode

[ Learn More ]

Step 3

Delete this registry key

[ Learn More ]

Important: Editing the Windows Registry incorrectly can lead to irreversible system malfunction. Please do this step only if you know how or you can ask assistance from your system administrator. Else, check this Microsoft article first before modifying your computer's registry.

  • In HKEY_CLASSES_ROOT
    • nj.D
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\nj.D
    • CLSID
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID
    • {D79F0736-B62D-37B8-A2C0-FB76C6F0D84C}
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{D79F0736-B62D-37B8-A2C0-FB76C6F0D84C}
    • InprocServer32
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{D79F0736-B62D-37B8-A2C0-FB76C6F0D84C}\InprocServer32
    • 0.0.0.0
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{D79F0736-B62D-37B8-A2C0-FB76C6F0D84C}
    • ProgId
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{D79F0736-B62D-37B8-A2C0-FB76C6F0D84C}
    • Implemented Categories
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{D79F0736-B62D-37B8-A2C0-FB76C6F0D84C}\Implemented Categories
    • {62C8FE65-4EBB-45e7-B440-6E39B2CDBF29}
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Component Categories
    • {62C8FE65-4EBB-45e7-B440-6E39B2CDBF29}
  • In HKEY_CLASSES_ROOT
    • nj.a
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\nj.a
    • CLSID
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID
    • {368080B9-32F7-357B-B491-F5239DA91118}
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{368080B9-32F7-357B-B491-F5239DA91118}
    • InprocServer32
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{368080B9-32F7-357B-B491-F5239DA91118}\InprocServer32
    • 0.0.0.0
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{368080B9-32F7-357B-B491-F5239DA91118}
    • ProgId
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{368080B9-32F7-357B-B491-F5239DA91118}
    • Implemented Categories
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{368080B9-32F7-357B-B491-F5239DA91118}\Implemented Categories
    • {62C8FE65-4EBB-45e7-B440-6E39B2CDBF29}
  • In HKEY_CLASSES_ROOT
    • nj.W
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\nj.W
    • CLSID
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID
    • {21D15CCB-5259-3F4D-A11C-131A0BD0EBF4}
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{21D15CCB-5259-3F4D-A11C-131A0BD0EBF4}
    • InprocServer32
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{21D15CCB-5259-3F4D-A11C-131A0BD0EBF4}\InprocServer32
    • 0.0.0.0
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{21D15CCB-5259-3F4D-A11C-131A0BD0EBF4}
    • ProgId
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{21D15CCB-5259-3F4D-A11C-131A0BD0EBF4}
    • Implemented Categories
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{21D15CCB-5259-3F4D-A11C-131A0BD0EBF4}\Implemented Categories
    • {62C8FE65-4EBB-45e7-B440-6E39B2CDBF29}

Step 4

Delete this registry value

[ Learn More ]

Important: Editing the Windows Registry incorrectly can lead to irreversible system malfunction. Please do this step only if you know how or you can ask assistance from your system administrator. Else, check this Microsoft article first before modifying your computer's registry.

  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
    • scv.exe = "%User Temp%\scv.exe"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
    • scv.exe = "%User Temp%\scv.exe"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\policies\system
    • EnableLUA = "0"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{D79F0736-B62D-37B8-A2C0-FB76C6F0D84C}\InprocServer32
    • ThreadingModel = "Both"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{D79F0736-B62D-37B8-A2C0-FB76C6F0D84C}\InprocServer32
    • Class = "nj.D"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{D79F0736-B62D-37B8-A2C0-FB76C6F0D84C}\InprocServer32
    • Assembly = "nj, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{D79F0736-B62D-37B8-A2C0-FB76C6F0D84C}\InprocServer32
    • RuntimeVersion = "v2.0.50727"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{D79F0736-B62D-37B8-A2C0-FB76C6F0D84C}\InprocServer32
    • CodeBase = "file:///%System Root%/DOCUME~1/Wilbert/LOCALS~1/Temp/SCV.exe"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{D79F0736-B62D-37B8-A2C0-FB76C6F0D84C}\InprocServer32\0.0.0.0
    • Class = "nj.D"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{D79F0736-B62D-37B8-A2C0-FB76C6F0D84C}\InprocServer32\0.0.0.0
    • Assembly = "nj, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{D79F0736-B62D-37B8-A2C0-FB76C6F0D84C}\InprocServer32\0.0.0.0
    • RuntimeVersion = "v2.0.50727"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{D79F0736-B62D-37B8-A2C0-FB76C6F0D84C}\InprocServer32\0.0.0.0
    • CodeBase = "file:///%System Root%/DOCUME~1/Wilbert/LOCALS~1/Temp/SCV.exe"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Component Categories\{62C8FE65-4EBB-45e7-B440-6E39B2CDBF29}
    • 0 = ".NET Category"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{368080B9-32F7-357B-B491-F5239DA91118}\InprocServer32
    • ThreadingModel = "Both"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{368080B9-32F7-357B-B491-F5239DA91118}\InprocServer32
    • Class = "nj.a"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{368080B9-32F7-357B-B491-F5239DA91118}\InprocServer32
    • Assembly = "nj, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{368080B9-32F7-357B-B491-F5239DA91118}\InprocServer32
    • RuntimeVersion = "v2.0.50727"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{368080B9-32F7-357B-B491-F5239DA91118}\InprocServer32
    • CodeBase = "file:///%System Root%/DOCUME~1/Wilbert/LOCALS~1/Temp/SCV.exe"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{368080B9-32F7-357B-B491-F5239DA91118}\InprocServer32\0.0.0.0
    • Class = "nj.a"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{368080B9-32F7-357B-B491-F5239DA91118}\InprocServer32\0.0.0.0
    • Assembly = "nj, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{368080B9-32F7-357B-B491-F5239DA91118}\InprocServer32\0.0.0.0
    • RuntimeVersion = "v2.0.50727"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{368080B9-32F7-357B-B491-F5239DA91118}\InprocServer32\0.0.0.0
    • CodeBase = "file:///%System Root%/DOCUME~1/Wilbert/LOCALS~1/Temp/SCV.exe"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{21D15CCB-5259-3F4D-A11C-131A0BD0EBF4}\InprocServer32
    • ThreadingModel = "Both"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{21D15CCB-5259-3F4D-A11C-131A0BD0EBF4}\InprocServer32
    • Class = "nj.W"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{21D15CCB-5259-3F4D-A11C-131A0BD0EBF4}\InprocServer32
    • Assembly = "nj, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{21D15CCB-5259-3F4D-A11C-131A0BD0EBF4}\InprocServer32
    • RuntimeVersion = "v2.0.50727"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{21D15CCB-5259-3F4D-A11C-131A0BD0EBF4}\InprocServer32
    • CodeBase = "file:///%System Root%/DOCUME~1/Wilbert/LOCALS~1/Temp/SCV.exe"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{21D15CCB-5259-3F4D-A11C-131A0BD0EBF4}\InprocServer32\0.0.0.0
    • Class = "nj.W"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{21D15CCB-5259-3F4D-A11C-131A0BD0EBF4}\InprocServer32\0.0.0.0
    • Assembly = "nj, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{21D15CCB-5259-3F4D-A11C-131A0BD0EBF4}\InprocServer32\0.0.0.0
    • RuntimeVersion = "v2.0.50727"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{21D15CCB-5259-3F4D-A11C-131A0BD0EBF4}\InprocServer32\0.0.0.0
    • CodeBase = "file:///%System Root%/DOCUME~1/Wilbert/LOCALS~1/Temp/SCV.exe"
  • In HKEY_CURRENT_USER
    • Nj = "2013-7-4"

Step 5

Search and delete these components

[ Learn More ]
There may be some components that are hidden. Please make sure you check the Search Hidden Files and Folders checkbox in the "More advanced options" option to include all hidden files and folders in the search result.
  • %User Temp%\scv.vbe
  • %User Startup%\scv.exe

Step 6

Restart in normal mode and scan your computer with your Trend Micro product for files detected as TROJ_MSIL.BBJ. If the detected files have already been cleaned, deleted, or quarantined by your Trend Micro product, no further step is required. You may opt to simply delete the quarantined files. Please check this Knowledge Base page for more information.

Step 7

Restore this file from backup only Microsoft-related files will be restored. If this malware/grayware also deleted files related to programs that are not from Microsoft, please reinstall those programs on you computer again.

  • %Windows%\Microsoft.NET\Framework\v2.0.50727\config\security.config.cch.696.129171
  • %Windows%\Microsoft.NET\Framework\v2.0.50727\config\enterprisesec.config.cch.696.129468
  • %User Profile%\v2.0.50727.42\security.config.cch.696.131281


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