Troj/Tepfer-Q
Posted: April 18, 2013
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: | 9/10 |
|---|---|
| Infected PCs: | 30 |
| First Seen: | April 18, 2013 |
|---|---|
| Last Seen: | April 14, 2022 |
| OS(es) Affected: | Windows |
Troj/Tepfer-Q is a Trojan that is a part of a spam malware attack related to the Boston Marathon bombing. Spam email messages state to include a link to video footage of Monday's terrorist activity in Boston, with subject lines such as '2 Explosions at Boston Marathon'. If the target recipient clicks on the link mistakenly, he/she is taken to a website which, while displaying the victim legitimate YouTube videos of the horrific incident, strives to corrupt the computer system with a Windows Trojan called Troj/Tepfer-Q. If installed on the compromised PC, Troj/Tepfer-Q makes modifications to the Windows Registry and installs the malicious files, which allow cybercrooks to gain remote access and control to the attacked computer. The file 'NPF.sys' is registered as a new service named 'NPF', with a display name of 'WinPcap Packet Driver (NPF)'.
Other subject lines used in the malware campaign involve:
Boston Explosion Caught on Video
Video of Explosion at the Boston Marathon 2013
Aftermath to explosion at Boston Marathon
It's no surprise to see that the links used in the malicious email can vary - no doubt in an attempt to avoid rudimentary email filtering but they all appear to be based in Ukraine and Latvia.
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:[System]\wpcap.dll
File name: [System]\wpcap.dllFile type: Dynamic link library
Mime Type: unknown/dll
Group: Malware file
[System]\Packet.dll
File name: [System]\Packet.dllFile type: Dynamic link library
Mime Type: unknown/dll
Group: Malware file
[System]\drivers\npf.sys
File name: [System]\drivers\npf.sysFile type: System file
Mime Type: unknown/sys
Group: Malware file
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