Trojan.Tapaoux
Posted: November 24, 2011
Threat Metric
The following fields listed on the Threat Meter containing a specific value, are explained in detail below:
Threat Level: The threat level scale goes from 1 to 10 where 10 is the highest level of severity and 1 is the lowest level of severity. Each specific level is relative to the threat's consistent assessed behaviors collected from SpyHunter's risk assessment model.
Detection Count: The collective number of confirmed and suspected cases of a particular malware threat. The detection count is calculated from infected PCs retrieved from diagnostic and scan log reports generated by SpyHunter.
Volume Count: Similar to the detection count, the Volume Count is specifically based on the number of confirmed and suspected threats infecting systems on a daily basis. High volume counts usually represent a popular threat but may or may not have infected a large number of systems. High detection count threats could lay dormant and have a low volume count. Criteria for Volume Count is relative to a daily detection count.
Trend Path: The Trend Path, utilizing an up arrow, down arrow or equal symbol, represents the level of recent movement of a particular threat. Up arrows represent an increase, down arrows represent a decline and the equal symbol represent no change to a threat's recent movement.
% Impact (Last 7 Days): This demonstrates a 7-day period change in the frequency of a malware threat infecting PCs. The percentage impact correlates directly to the current Trend Path to determine a rise or decline in the percentage.
| Threat Level: | 8/10 |
|---|---|
| Infected PCs: | 14 |
| First Seen: | November 24, 2011 |
|---|---|
| Last Seen: | August 22, 2018 |
| OS(es) Affected: | Windows |
Trojan.Tapaoux is a harmful Trojan that downloads and installs additional malware threats onto the computer system. Trojan.Tapaoux covers itself as a normal Windows service and writes itself into startup process and Windows Registry. Trojan.Tapaoux tries to exploit the Adobe Reader 'CoolType.dll' TTF Font Remote Code Execution Vulnerability (BID 43057). Once the Trojan is executed, it adds a DLL file and installs itself as a system driver. Trojan.Tapaoux also checks for security-related software by looking for certain registry subkeys. If Trojan.Tapaoux finds any of the appropriate registry subkeys or processes, it will exit. Trojan.Tapaoux then tries to connect to certain domains. If Trojan.Tapaoux connects successfully, it will download and install potentially malicious files onto the affected machine and execute them. Also, Trojan.Tapaoux installs a rootkit that modifies the System Service Dispatch Table (SSDT) in order to disguise itself.
Technical Details
File System Modifications
Tutorials: If you wish to learn how to remove malware components manually, you can read the tutorials on how to find malware, kill unwanted processes, remove malicious DLLs and delete other harmful files. Always be sure to back up your PC before making any changes.
The following files were created in the system:C:\Users\<username>\Desktop\file.exe
File name: file.exeSize: 43.52 KB (43523 bytes)
MD5: c2915bece3269b7a8dac1e2745063b49
Detection count: 93
File type: Executable File
Mime Type: unknown/exe
Path: C:\Users\<username>\Desktop
Group: Malware file
Last Updated: April 4, 2018
%SYSTEMDRIVE%\Users\<username>\AppData\Roaming\iexp\expsrv32.exe
File name: expsrv32.exeSize: 113.43 KB (113432 bytes)
MD5: 653ffc574a13c4bc8337c688124fd0bf
Detection count: 58
File type: Executable File
Mime Type: unknown/exe
Path: %SYSTEMDRIVE%\Users\<username>\AppData\Roaming\iexp\expsrv32.exe
Group: Malware file
Last Updated: June 26, 2020
vpmde.dll
File name: vpmde.dllSize: 166.68 KB (166680 bytes)
MD5: 566e92f79497a3c6136b815c9960b898
Detection count: 57
File type: Dynamic link library
Mime Type: unknown/dll
Group: Malware file
file.dll
File name: file.dllSize: 174.87 KB (174872 bytes)
MD5: 387128c489a66a70c7ed76b27f1dd4e2
Detection count: 17
File type: Dynamic link library
Mime Type: unknown/dll
Group: Malware file
Last Updated: November 28, 2011
6619a4ff7f0478f8c15fc0391651a1694afe876d25ebd07e3da08167e4f0b3d3.exe
File name: 6619a4ff7f0478f8c15fc0391651a1694afe876d25ebd07e3da08167e4f0b3d3.exeSize: 370.87 KB (370872 bytes)
MD5: 60af79fb0bd2c9f33375035609c931cb
Detection count: 5
File type: Executable File
Mime Type: unknown/exe
Group: Malware file
Last Updated: August 14, 2021
%System%\schechk.exe
File name: %System%\schechk.exeFile type: Executable File
Mime Type: unknown/exe
Group: Malware file
%System%\hwpolicy.dll
File name: %System%\hwpolicy.dllFile type: Dynamic link library
Mime Type: unknown/dll
Group: Malware file
%System%\schechk.bin
File name: %System%\schechk.binFile type: Binary File
Mime Type: unknown/bin
Group: Malware file
%System%\schechk.sys
File name: %System%\schechk.sysFile type: System file
Mime Type: unknown/sys
Group: Malware file
%System%\imagepk.sys
File name: %System%\imagepk.sysFile type: System file
Mime Type: unknown/sys
Group: Malware file
%System%\npidsz4.sys
File name: %System%\npidsz4.sysFile type: System file
Mime Type: unknown/sys
Group: Malware file
%System%\securx86.sys
File name: %System%\securx86.sysFile type: System file
Mime Type: unknown/sys
Group: Malware file
%System%\hwpolicy.sys
File name: %System%\hwpolicy.sysFile type: System file
Mime Type: unknown/sys
Group: Malware file
%System%\sscore1.sys
File name: %System%\sscore1.sysFile type: System file
Mime Type: unknown/sys
Group: Malware file
%System%\sisraid3.sys
File name: %System%\sisraid3.sysFile type: System file
Mime Type: unknown/sys
Group: Malware file
%System%\expsrv32.sys
File name: %System%\expsrv32.sysFile type: System file
Mime Type: unknown/sys
Group: Malware file
%System%\ql5200.sys
File name: %System%\ql5200.sysFile type: System file
Mime Type: unknown/sys
Group: Malware file
More files
Registry Modifications
HKEY..\..\..\..{Subkeys}HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\EpsonK200
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