TROJ_DLOADR.JG
[2.nsis]:Generic MSVC, [4.nsis]:Generic.gi, [5.nsis]:RDN/Generic.bfr!w (McAfee); Downloader (Symantec); Trojan.Win32.BHO.evj (Kaspersky); Trojan.Win32.Generic.pak!cobra, Adware.Agent.gen, Trojan.Win32.Generic!BT (Sunbelt); Trojan horse Agent.XYB.dropper (AVG)
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
91,420 bytes
EXE
Yes
05 Jun 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.
Autostart Technique
This Trojan adds the following registry entries to enable its automatic execution at every system startup:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Run
usmsvc = "%System%\usmsvc.exe"
It registers itself as a BHO to ensure its automatic execution every time Internet Explorer is used by adding the following registry keys:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Explorer\
Browser Helper Objects\{6014EABC-B61A-4F07-A32B-440EAE835DF9}
Other System Modifications
This Trojan deletes the following files:
- %User Temp%\nsp1.tmp
(Note: %User Temp% is the user's temporary folder, where it usually is C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Local\Temp on Windows Vista (32- and 64-bit), Windows 7 (32- and 64-bit), Windows 8 (32- and 64-bit), Windows 8.1 (32- and 64-bit), Windows Server 2008, and Windows Server 2012.)
It adds the following registry keys:
HKEY_CLASSES_ROOT\Usmsho.CMsgCenter.1
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Usmsho.CMsgCenter.1\CLSID
HKEY_CLASSES_ROOT\Usmsho.CMsgCenter
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Usmsho.CMsgCenter\CLSID
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Usmsho.CMsgCenter\CurVer
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{6014EABC-B61A-4F07-A32B-440EAE835DF9}
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{6014EABC-B61A-4F07-A32B-440EAE835DF9}\ProgID
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{6014EABC-B61A-4F07-A32B-440EAE835DF9}\VersionIndependentProgID
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{6014EABC-B61A-4F07-A32B-440EAE835DF9}\Programmable
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{6014EABC-B61A-4F07-A32B-440EAE835DF9}\InprocServer32
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{6014EABC-B61A-4F07-A32B-440EAE835DF9}\TypeLib
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{1CDAE980-D9E4-4DE6-A47A-12976DC299A9}
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{1CDAE980-D9E4-4DE6-A47A-12976DC299A9}\1.0
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{1CDAE980-D9E4-4DE6-A47A-12976DC299A9}\1.0\
FLAGS
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{1CDAE980-D9E4-4DE6-A47A-12976DC299A9}\1.0\
0
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{1CDAE980-D9E4-4DE6-A47A-12976DC299A9}\1.0\
0\win32
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{1CDAE980-D9E4-4DE6-A47A-12976DC299A9}\1.0\
HELPDIR
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{C33D3C5D-1068-46E5-8E24-CF11D3DB2253}
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{C33D3C5D-1068-46E5-8E24-CF11D3DB2253}\ProxyStubClsid
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{C33D3C5D-1068-46E5-8E24-CF11D3DB2253}\ProxyStubClsid32
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{C33D3C5D-1068-46E5-8E24-CF11D3DB2253}\TypeLib
It adds the following registry entries:
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{6014EABC-B61A-4F07-A32B-440EAE835DF9}\InprocServer32
ThreadingModel = "Apartment"
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{C33D3C5D-1068-46E5-8E24-CF11D3DB2253}\TypeLib
Version = "1.0"
Dropping Routine
This Trojan drops the following files:
- %System%\360up.exe
- %System%\wv.dat
- %System%\usmsvc.exe
- %System%\TElem32.dll
- %System%\imsins.ini
- %System%\usmsho.dll
(Note: %System% is the Windows system folder, where it usually is C:\Windows\System32 on all Windows operating system versions.)
Other Details
This Trojan connects to the following possibly malicious URL:
- ftp://wch:1212qwqw@xin1.{BLOCKED}x546.cn/config11/task.ini
- http://www.{BLOCKED}o.com/software/pv/config/default.htm
This report is generated via an automated analysis system.
SOLUTION
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
Step 3
Close all opened browser windows
Step 4
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_CLASSES_ROOT
- Usmsho.CMsgCenter.1
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Usmsho.CMsgCenter.1
- CLSID
- In HKEY_CLASSES_ROOT
- Usmsho.CMsgCenter
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Usmsho.CMsgCenter
- CLSID
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Usmsho.CMsgCenter
- CurVer
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID
- {6014EABC-B61A-4F07-A32B-440EAE835DF9}
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{6014EABC-B61A-4F07-A32B-440EAE835DF9}
- ProgID
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{6014EABC-B61A-4F07-A32B-440EAE835DF9}
- VersionIndependentProgID
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{6014EABC-B61A-4F07-A32B-440EAE835DF9}
- Programmable
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{6014EABC-B61A-4F07-A32B-440EAE835DF9}
- InprocServer32
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{6014EABC-B61A-4F07-A32B-440EAE835DF9}
- TypeLib
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib
- {1CDAE980-D9E4-4DE6-A47A-12976DC299A9}
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{1CDAE980-D9E4-4DE6-A47A-12976DC299A9}
- 1.0
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{1CDAE980-D9E4-4DE6-A47A-12976DC299A9}\1.0
- FLAGS
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{1CDAE980-D9E4-4DE6-A47A-12976DC299A9}\1.0
- 0
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{1CDAE980-D9E4-4DE6-A47A-12976DC299A9}\1.0\0
- win32
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{1CDAE980-D9E4-4DE6-A47A-12976DC299A9}\1.0
- HELPDIR
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface
- {C33D3C5D-1068-46E5-8E24-CF11D3DB2253}
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{C33D3C5D-1068-46E5-8E24-CF11D3DB2253}
- ProxyStubClsid
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{C33D3C5D-1068-46E5-8E24-CF11D3DB2253}
- ProxyStubClsid32
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{C33D3C5D-1068-46E5-8E24-CF11D3DB2253}
- TypeLib
Step 5
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_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
- usmsvc = "%System%\usmsvc.exe"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{6014EABC-B61A-4F07-A32B-440EAE835DF9}\InprocServer32
- ThreadingModel = "Apartment"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{C33D3C5D-1068-46E5-8E24-CF11D3DB2253}\TypeLib
- Version = "1.0"
Step 6
Search and delete these components
- %System%\360up.exe
- %System%\wv.dat
- %System%\usmsvc.exe
- %System%\TElem32.dll
- %System%\imsins.ini
- %System%\usmsho.dll
Step 7
Restart in normal mode and scan your computer with your Trend Micro product for files detected as TROJ_DLOADR.JG. 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 8
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%\nsp1.tmp
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