TROJ_OBFUSCATED_0000030.TOMA
TrojanDownloader:Win32/Renos.GN (Microsoft); Downloader-BON (McAfee); SecurityRisk.Dropper (Symantec); Trojan-Downloader.Win32.FraudLoad.wirn (Kaspersky); Trojan-Spy.Win32.Zbot.njy (v) (Sunbelt); Trojan horse FakeAlert.HR (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.
It disables Task Manager, Registry Editor, and Folder Options.
TECHNICAL DETAILS
72,192 bytes
EXE
No
11 May 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 creates the following folders:
- %Program Files%\XPPoliceAntivirus
(Note: %Program Files% is the default Program Files folder, usually C:\Program Files in Windows 2000, Server 2003, and XP (32-bit), Vista (32-bit), and 7 (32-bit), or C:\Program Files (x86) in Windows XP (64-bit), Vista (64-bit), and 7 (64-bit).)
Autostart Technique
This Trojan 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\{b6b571fb-b71d-449c-ad70-82e966328795}
Other System Modifications
This Trojan adds the following registry keys:
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Policies\
System
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Explorer\
Browser Helper Objects
HKEY_CLASSES_ROOT\WinApp.WinSafe.1
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
WinApp.WinSafe.1\CLSID
HKEY_CLASSES_ROOT\WinApp.WinSafe
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
WinApp.WinSafe\CLSID
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
WinApp.WinSafe\CurVer
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{b6b571fb-b71d-449c-ad70-82e966328795}
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{b6b571fb-b71d-449c-ad70-82e966328795}\ProgID
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{b6b571fb-b71d-449c-ad70-82e966328795}\VersionIndependentProgID
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{b6b571fb-b71d-449c-ad70-82e966328795}\Programmable
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{b6b571fb-b71d-449c-ad70-82e966328795}\InprocServer32
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{b6b571fb-b71d-449c-ad70-82e966328795}\TypeLib
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{16406580-14CE-4441-B904-AD56CC8064CA}
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{16406580-14CE-4441-B904-AD56CC8064CA}\1.0
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{16406580-14CE-4441-B904-AD56CC8064CA}\1.0\
FLAGS
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{16406580-14CE-4441-B904-AD56CC8064CA}\1.0\
0
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{16406580-14CE-4441-B904-AD56CC8064CA}\1.0\
0\win32
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{16406580-14CE-4441-B904-AD56CC8064CA}\1.0\
HELPDIR
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{967A494A-6AEC-4555-9CAF-FA6EB00ACF91}
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{967A494A-6AEC-4555-9CAF-FA6EB00ACF91}\ProxyStubClsid
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{967A494A-6AEC-4555-9CAF-FA6EB00ACF91}\ProxyStubClsid32
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{967A494A-6AEC-4555-9CAF-FA6EB00ACF91}\TypeLib
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{9692BE2F-EB8F-49D9-A11C-C24C1EF734D5}
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{9692BE2F-EB8F-49D9-A11C-C24C1EF734D5}\ProxyStubClsid
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{9692BE2F-EB8F-49D9-A11C-C24C1EF734D5}\ProxyStubClsid32
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{9692BE2F-EB8F-49D9-A11C-C24C1EF734D5}\TypeLib
It adds the following registry entries:
HKEY_CURRENT_USER\Control Panel\don't load
scui.cpl = "No"
HKEY_CURRENT_USER\Control Panel\don't load
wscui.cpl = "No"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Explorer\
Browser Helper Objects\{b6b571fb-b71d-449c-ad70-82e966328795}
NoExplorer = "1"
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{b6b571fb-b71d-449c-ad70-82e966328795}\InprocServer32
ThreadingModel = "Apartment"
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{967A494A-6AEC-4555-9CAF-FA6EB00ACF91}\TypeLib
Version = "1.0"
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{9692BE2F-EB8F-49D9-A11C-C24C1EF734D5}\TypeLib
Version = "1.0"
It modifies the following registry entries:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Security Center
AntiVirusDisableNotify = "1"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Security Center
UpdatesDisableNotify = "1"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Security Center
FirewallDisableNotify = "1"
It creates the following registry entry(ies) to disable Task Manager, Registry Tools and Folder Options:
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Policies\
System
DisableTaskMgr = "1"
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Policies\
System
DisableRegistryTools = "1"
Dropping Routine
This Trojan drops the following files:
- %Program Files%\XPPoliceAntivirus\setup.dat
(Note: %Program Files% is the default Program Files folder, usually C:\Program Files in Windows 2000, Server 2003, and XP (32-bit), Vista (32-bit), and 7 (32-bit), or C:\Program Files (x86) in Windows XP (64-bit), Vista (64-bit), and 7 (64-bit).)
Other Details
This Trojan connects to the following possibly malicious URL:
- http://{BLOCKED}.194.188/setup.dat
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
Close all opened browser windows
Step 3
Enable Registry Editor, Task Manager, and Folder options
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_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies
- System
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer
- Browser Helper Objects
- In HKEY_CLASSES_ROOT
- WinApp.WinSafe.1
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\WinApp.WinSafe.1
- CLSID
- In HKEY_CLASSES_ROOT
- WinApp.WinSafe
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\WinApp.WinSafe
- CLSID
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\WinApp.WinSafe
- CurVer
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID
- {b6b571fb-b71d-449c-ad70-82e966328795}
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{b6b571fb-b71d-449c-ad70-82e966328795}
- ProgID
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{b6b571fb-b71d-449c-ad70-82e966328795}
- VersionIndependentProgID
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{b6b571fb-b71d-449c-ad70-82e966328795}
- Programmable
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{b6b571fb-b71d-449c-ad70-82e966328795}
- InprocServer32
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{b6b571fb-b71d-449c-ad70-82e966328795}
- TypeLib
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib
- {16406580-14CE-4441-B904-AD56CC8064CA}
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{16406580-14CE-4441-B904-AD56CC8064CA}
- 1.0
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{16406580-14CE-4441-B904-AD56CC8064CA}\1.0
- FLAGS
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{16406580-14CE-4441-B904-AD56CC8064CA}\1.0
- 0
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{16406580-14CE-4441-B904-AD56CC8064CA}\1.0\0
- win32
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{16406580-14CE-4441-B904-AD56CC8064CA}\1.0
- HELPDIR
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface
- {967A494A-6AEC-4555-9CAF-FA6EB00ACF91}
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{967A494A-6AEC-4555-9CAF-FA6EB00ACF91}
- ProxyStubClsid
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{967A494A-6AEC-4555-9CAF-FA6EB00ACF91}
- ProxyStubClsid32
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{967A494A-6AEC-4555-9CAF-FA6EB00ACF91}
- TypeLib
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface
- {9692BE2F-EB8F-49D9-A11C-C24C1EF734D5}
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{9692BE2F-EB8F-49D9-A11C-C24C1EF734D5}
- ProxyStubClsid
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{9692BE2F-EB8F-49D9-A11C-C24C1EF734D5}
- ProxyStubClsid32
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{9692BE2F-EB8F-49D9-A11C-C24C1EF734D5}
- 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_CURRENT_USER\Control Panel\don't load
- scui.cpl = "No"
- In HKEY_CURRENT_USER\Control Panel\don't load
- wscui.cpl = "No"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{b6b571fb-b71d-449c-ad70-82e966328795}
- NoExplorer = "1"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{b6b571fb-b71d-449c-ad70-82e966328795}\InprocServer32
- ThreadingModel = "Apartment"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{967A494A-6AEC-4555-9CAF-FA6EB00ACF91}\TypeLib
- Version = "1.0"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{9692BE2F-EB8F-49D9-A11C-C24C1EF734D5}\TypeLib
- Version = "1.0"
Step 6
Restore these modified registry values
Important:Editing the Windows Registry incorrectly can lead to irreversible system malfunction. Please do this only if you know how to or you can seek your system administrator's help. You may also check out this Microsoft article first before modifying your computer's registry.
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Security Center
- AntiVirusDisableNotify = "1"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Security Center
- UpdatesDisableNotify = "1"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Security Center
- FirewallDisableNotify = "1"
Step 7
Search and delete this file
- %Program Files%\XPPoliceAntivirus\setup.dat
Step 8
Search and delete this folder
- %Program Files%\XPPoliceAntivirus
Step 9
Scan your computer with your Trend Micro product to delete files detected as TROJ_OBFUSCATED_0000030.TOMA. 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.
Did this description help? Tell us how we did.