TROJ_DIALR6.TOMA
Dialer:Win32/WebDial.A [non_writable_container] (Microsoft); Dialer-RAS.c.gen. (McAfee); Dialer.Generic (Symantec); Trojan.Win32.Scar.omgz (Kaspersky); Dial/WebDial-A (Sophos); BehavesLike.Win32.Malware.wsc (mx-v) (Sunbelt)
Windows
![](/vinfo/imgFiles/legend.jpg)
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
48,128 bytes
EXE
Yes
08 Oct 2019
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:
- %windows%\{malware file name}.exe
It adds the following processes:
- %System%\svchost.exe -k netsvcs
(Note: %System% is the Windows system folder, where it usually is C:\Windows\System32 on all Windows operating system versions.)
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
3ae2b1738a578affb7a2f6bb641c23b597ef913e = "%windows%\{malware file name}.exe -m"
Other System Modifications
This Trojan deletes the following files:
- %Start Menu%\Programs\3ae2b1738a578affb7a2f6bb641c23b597ef913e.lnk
- %User Startup%\3ae2b1738a578affb7a2f6bb641c23b597ef913e.lnk
(Note: %Start Menu% is the current user's Start Menu folder, which is usually C:\Windows\Start Menu or C:\Documents and Settings\{User name}\Start Menu on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\AppData\Roaming\Microsoft\Windows\Start Menu on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).. %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, C:\Documents and Settings\{User name}\Start Menu\Programs\Startup on Windows 2003(32-bit), XP and 2000(32-bit), or C:\Users\{user name}\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit), 10(64-bit).)
It adds the following registry keys:
HKEY_CURRENT_USER\Software\Webdialer
HKEY_CURRENT_USER\Software\Webdialer\
105-1-19-2
HKEY_LOCAL_MACHINE\Software\Microsoft\
Windows\CurrentVersion\Uninstall\
Webdialer - www.lesbianteens.de Reg.N:105-1-19-2
It adds the following registry entries:
HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\
Microsoft\Windows\CurrentVersion\
Uninstall\Webdialer - www.lesbianteens.de Reg.N:105-1-19-2
DisplayName = "WebDialer - www.lesbianteens.de Reg.N:105-1-19-2"
HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\
Microsoft\Windows\CurrentVersion\
Uninstall\Webdialer - www.lesbianteens.de Reg.N:105-1-19-2
UninstallString = "%windows%\{malware file name}.exe -m -u"
HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\
Microsoft\Tracing\3ae2b1738a578affb7a2f6bb641c23b597ef913e_RASMANCS
EnableFileTracing = "0"
HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\
Microsoft\Tracing\3ae2b1738a578affb7a2f6bb641c23b597ef913e_RASMANCS
EnableConsoleTracing = "0"
HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\
Microsoft\Tracing\3ae2b1738a578affb7a2f6bb641c23b597ef913e_RASMANCS
FileTracingMask = "4294901760"
HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\
Microsoft\Tracing\3ae2b1738a578affb7a2f6bb641c23b597ef913e_RASMANCS
ConsoleTracingMask = "4294901760"
HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\
Microsoft\Tracing\3ae2b1738a578affb7a2f6bb641c23b597ef913e_RASMANCS
MaxFileSize = "1048576"
HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\
Microsoft\Tracing\3ae2b1738a578affb7a2f6bb641c23b597ef913e_RASMANCS
FileDirectory = "%windir%\tracing"
It deletes the following registry keys:
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run\
3ae2b1738a578affb7a2f6bb641c23b597ef913e
Dropping Routine
This Trojan drops the following files:
- %Start Menu%\3ae2b1738a578affb7a2f6bb641c23b597ef913e.lnk
- %Desktop%\3ae2b1738a578affb7a2f6bb641c23b597ef913e.lnk
(Note: %Start Menu% is the current user's Start Menu folder, which is usually C:\Windows\Start Menu or C:\Documents and Settings\{User name}\Start Menu on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\AppData\Roaming\Microsoft\Windows\Start Menu on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).. %Desktop% is the current user's desktop, which is usually C:\Documents and Settings\{User Name}\Desktop on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\Desktop on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).)
This report is generated via an automated analysis system.
SOLUTION
9.850
Step 1
Before doing any scans, Windows 7, Windows 8, Windows 8.1, and Windows 10 users must disable System Restore to allow full scanning of their computers.
Step 2
Restart in Safe Mode
Step 3
Identify and terminate files detected as TROJ_DIALR6.TOMA
- Windows Task Manager may not display all running processes. In this case, please use a third-party process viewer, preferably Process Explorer, to terminate the malware/grayware/spyware file. You may download the said tool here.
- If the detected file is displayed in either Windows Task Manager or Process Explorer but you cannot delete it, restart your computer in safe mode. To do this, refer to this link for the complete steps.
- If the detected file is not displayed in either Windows Task Manager or Process Explorer, continue doing the next steps.
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
- Webdialer
- In HKEY_CURRENT_USER\Software\Webdialer
- 105-1-19-2
- In HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Uninstall
- Webdialer - www.lesbianteens.de Reg.N:105-1-19-2
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\Software\Microsoft\Windows\CurrentVersion\Run
- 3ae2b1738a578affb7a2f6bb641c23b597ef913e = "%windows%\{malware file name}.exe -m"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall\Webdialer - www.lesbianteens.de Reg.N:105-1-19-2
- DisplayName = "WebDialer - www.lesbianteens.de Reg.N:105-1-19-2"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall\Webdialer - www.lesbianteens.de Reg.N:105-1-19-2
- UninstallString = "%windows%\{malware file name}.exe -m -u"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Tracing\3ae2b1738a578affb7a2f6bb641c23b597ef913e_RASMANCS
- EnableFileTracing = "0"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Tracing\3ae2b1738a578affb7a2f6bb641c23b597ef913e_RASMANCS
- EnableConsoleTracing = "0"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Tracing\3ae2b1738a578affb7a2f6bb641c23b597ef913e_RASMANCS
- FileTracingMask = "4294901760"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Tracing\3ae2b1738a578affb7a2f6bb641c23b597ef913e_RASMANCS
- ConsoleTracingMask = "4294901760"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Tracing\3ae2b1738a578affb7a2f6bb641c23b597ef913e_RASMANCS
- MaxFileSize = "1048576"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Tracing\3ae2b1738a578affb7a2f6bb641c23b597ef913e_RASMANCS
- FileDirectory = "%windir%\tracing"
Step 6
Search and delete these components
- %Start Menu%\3ae2b1738a578affb7a2f6bb641c23b597ef913e.lnk
- %Desktop%\3ae2b1738a578affb7a2f6bb641c23b597ef913e.lnk
Step 7
Restart in normal mode and scan your computer with your Trend Micro product for files detected as TROJ_DIALR6.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.
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.
- %Start Menu%\Programs\3ae2b1738a578affb7a2f6bb641c23b597ef913e.lnk
- %User Startup%\3ae2b1738a578affb7a2f6bb641c23b597ef913e.lnk
Step 9
Restore these deleted registry keys/values from backup
*Note: Only Microsoft-related keys/values will be restored. If the malware/grayware also deleted registry keys/values related to programs that are not from Microsoft, please reinstall those programs on your computer.
- In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
- 3ae2b1738a578affb7a2f6bb641c23b597ef913e
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