TROJ_AGENT.BCGG
[6.nsis]:Generic.tfr!bu (McAfee); ARC:NSIS (Kaspersky); Trojan.Win32.Generic!BT (Sunbelt); MemScan:Trojan.Generic.5481775 (FSecure)
Windows 2000, Windows XP, Windows Server 2003
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
161,374 bytes
EXE
No
19 May 2012
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 creates the following folders:
- %System Root%\Documents and Settings\Administrator
(Note: %System Root% is the root folder, which is usually C:\. It is also where the operating system is located.)
Other System Modifications
This Trojan deletes the following files:
- %User Temp%\nsc1.tmp
(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.)
It adds the following registry keys:
HKEY_CURRENT_USER\Software\kdisk_barcon01
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
barcon
HKEY_CLASSES_ROOT\TestExtension.MasterObject.1
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TestExtension.MasterObject.1\CLSID
HKEY_CLASSES_ROOT\TestExtension.MasterObject
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TestExtension.MasterObject\CLSID
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TestExtension.MasterObject\CurVer
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{D700729C-E1F0-4D92-8C00-DEDEB6A69D88}
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{D700729C-E1F0-4D92-8C00-DEDEB6A69D88}\ProgID
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{D700729C-E1F0-4D92-8C00-DEDEB6A69D88}\VersionIndependentProgID
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{D700729C-E1F0-4D92-8C00-DEDEB6A69D88}\Programmable
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{D700729C-E1F0-4D92-8C00-DEDEB6A69D88}\InprocServer32
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{D700729C-E1F0-4D92-8C00-DEDEB6A69D88}\TypeLib
HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\Extensions\{C1F0024B-8278-4999-B7E6-2718426D9FE6}
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{B4DDB057-9EDC-45B5-89A3-8CAD9F265F1E}
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{B4DDB057-9EDC-45B5-89A3-8CAD9F265F1E}\1.0
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{B4DDB057-9EDC-45B5-89A3-8CAD9F265F1E}\1.0\
FLAGS
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{B4DDB057-9EDC-45B5-89A3-8CAD9F265F1E}\1.0\
0
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{B4DDB057-9EDC-45B5-89A3-8CAD9F265F1E}\1.0\
0\win32
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{B4DDB057-9EDC-45B5-89A3-8CAD9F265F1E}\1.0\
HELPDIR
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{D89080BE-5019-4399-96E1-2A0E32AEF599}
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{D89080BE-5019-4399-96E1-2A0E32AEF599}\ProxyStubClsid
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{D89080BE-5019-4399-96E1-2A0E32AEF599}\ProxyStubClsid32
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{D89080BE-5019-4399-96E1-2A0E32AEF599}\TypeLib
It adds the following registry entries:
HKEY_CURRENT_USER\Software\kdisk_barcon01
installed = "1"
HKEY_CURRENT_USER\Software\kdisk_barcon01
cp_code = "pandorabc_05"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
barcon
DisplayName = "ÃֽſµÈ ´Ù¿î¹Þ±â"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
barcon
DisplayIcon = "%System%\movie6.ico"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
barcon
DisplayVersion = "1.0"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
barcon
UninstallString = "%System%\Uninstallbarcon.exe"
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{D700729C-E1F0-4D92-8C00-DEDEB6A69D88}\InprocServer32
ThreadingModel = "Apartment"
HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\Extensions\{C1F0024B-8278-4999-B7E6-2718426D9FE6}
ButtonText = "ÃֽſµÈ ´Ù¿î¹Þ±â"
HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\Extensions\{C1F0024B-8278-4999-B7E6-2718426D9FE6}
Icon = "%System%\barcon.dll,201"
HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\Extensions\{C1F0024B-8278-4999-B7E6-2718426D9FE6}
HotIcon = "%System%\barcon.dll,202"
HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\Extensions\{C1F0024B-8278-4999-B7E6-2718426D9FE6}
CLSID = "{1FBA04EE-3024-11d2-8F1F-0000F87ABD16}"
HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\Extensions\{C1F0024B-8278-4999-B7E6-2718426D9FE6}
ClsidExtension = "{D700729C-E1F0-4D92-8C00-DEDEB6A69D88}"
HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\Extensions\{C1F0024B-8278-4999-B7E6-2718426D9FE6}
Default Visible = "yes"
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{D89080BE-5019-4399-96E1-2A0E32AEF599}\TypeLib
Version = "1.0"
Dropping Routine
This Trojan drops the following files:
- %User Profile%\Application Data\SetupHlpr.exe
- %User Profile%\Application Data\movie6.ico
- %Desktop%\ÃֽſµÈ ´Ù¿î¹Þ±â.lnk
- %System%\barcon.dll
- %System%\movie6.ico
- %System%\SetupHlpr.exe
- %System%\Uninstallbarcon.exe
(Note: %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.. %Desktop% is the current user's desktop, which is usually C:\Documents and Settings\{User Name}\Desktop on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\Desktop on Windows Vista and 7.. %System% is the Windows system folder, which is usually C:\Windows\System32.)
This report is generated via an automated analysis system.
SOLUTION
9.200
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
Delete this registry key
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
- kdisk_barcon01
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall
- barcon
- In HKEY_CLASSES_ROOT
- TestExtension.MasterObject.1
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TestExtension.MasterObject.1
- CLSID
- In HKEY_CLASSES_ROOT
- TestExtension.MasterObject
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TestExtension.MasterObject
- CLSID
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TestExtension.MasterObject
- CurVer
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID
- {D700729C-E1F0-4D92-8C00-DEDEB6A69D88}
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{D700729C-E1F0-4D92-8C00-DEDEB6A69D88}
- ProgID
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{D700729C-E1F0-4D92-8C00-DEDEB6A69D88}
- VersionIndependentProgID
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{D700729C-E1F0-4D92-8C00-DEDEB6A69D88}
- Programmable
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{D700729C-E1F0-4D92-8C00-DEDEB6A69D88}
- InprocServer32
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{D700729C-E1F0-4D92-8C00-DEDEB6A69D88}
- TypeLib
- In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Extensions
- {C1F0024B-8278-4999-B7E6-2718426D9FE6}
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib
- {B4DDB057-9EDC-45B5-89A3-8CAD9F265F1E}
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{B4DDB057-9EDC-45B5-89A3-8CAD9F265F1E}
- 1.0
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{B4DDB057-9EDC-45B5-89A3-8CAD9F265F1E}\1.0
- FLAGS
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{B4DDB057-9EDC-45B5-89A3-8CAD9F265F1E}\1.0
- 0
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{B4DDB057-9EDC-45B5-89A3-8CAD9F265F1E}\1.0\0
- win32
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{B4DDB057-9EDC-45B5-89A3-8CAD9F265F1E}\1.0
- HELPDIR
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface
- {D89080BE-5019-4399-96E1-2A0E32AEF599}
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{D89080BE-5019-4399-96E1-2A0E32AEF599}
- ProxyStubClsid
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{D89080BE-5019-4399-96E1-2A0E32AEF599}
- ProxyStubClsid32
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{D89080BE-5019-4399-96E1-2A0E32AEF599}
- TypeLib
Step 3
Delete this registry value
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\kdisk_barcon01
- installed = "1"
- In HKEY_CURRENT_USER\Software\kdisk_barcon01
- cp_code = "pandorabc_05"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\barcon
- DisplayName = "ÃֽſµÈ ´Ù¿î¹Þ±â"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\barcon
- DisplayIcon = "%System%\movie6.ico"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\barcon
- DisplayVersion = "1.0"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\barcon
- UninstallString = "%System%\Uninstallbarcon.exe"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{D700729C-E1F0-4D92-8C00-DEDEB6A69D88}\InprocServer32
- ThreadingModel = "Apartment"
- In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Extensions\{C1F0024B-8278-4999-B7E6-2718426D9FE6}
- ButtonText = "ÃֽſµÈ ´Ù¿î¹Þ±â"
- In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Extensions\{C1F0024B-8278-4999-B7E6-2718426D9FE6}
- Icon = "%System%\barcon.dll,201"
- In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Extensions\{C1F0024B-8278-4999-B7E6-2718426D9FE6}
- HotIcon = "%System%\barcon.dll,202"
- In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Extensions\{C1F0024B-8278-4999-B7E6-2718426D9FE6}
- CLSID = "{1FBA04EE-3024-11d2-8F1F-0000F87ABD16}"
- In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Extensions\{C1F0024B-8278-4999-B7E6-2718426D9FE6}
- ClsidExtension = "{D700729C-E1F0-4D92-8C00-DEDEB6A69D88}"
- In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Extensions\{C1F0024B-8278-4999-B7E6-2718426D9FE6}
- Default Visible = "yes"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{D89080BE-5019-4399-96E1-2A0E32AEF599}\TypeLib
- Version = "1.0"
Step 4
Search and delete these components
- %User Profile%\Application Data\SetupHlpr.exe
- %User Profile%\Application Data\movie6.ico
- %Desktop%\ÃֽſµÈ ´Ù¿î¹Þ±â.lnk
- %System%\barcon.dll
- %System%\movie6.ico
- %System%\SetupHlpr.exe
- %System%\Uninstallbarcon.exe
Step 5
Search and delete this folder
- %System Root%\Documents and Settings\Administrator
Step 6
Scan your computer with your Trend Micro product to delete files detected as TROJ_AGENT.BCGG. 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.
- %User Temp%\nsc1.tmp
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