heb.exe - The Trojan Installer Program

This section describes what is the Trojan installer program heb.exe and how McAfee VirusScan failed to stop it from installing malicious executable programs with random names in the system folder.

I continued my inspection of the McAfee VirusScan log file, OnAccessScanLog.txt, as mentioned in the previous section and found what the Trojan installer program heb.exe did to the system:

< date< 6:01:07 PM Deleted hyang C:\WINDOWS\system32\heb.exe
   C:\WINDOWS\SYSTEM32\PCAXYOQRXA.EXE PWS-Mmorpg.gen (Trojan)

< date< 6:01:07 PM Deleted hyang C:\WINDOWS\system32\heb.exe 
   C:\WINDOWS\system32\pcaxyoqrxa.exe\pcaxyoqrxa.exe\0000d500.EXE 
   PWS-Mmorpg.gen (Trojan)
   
< date< 6:01:07 PM Deleted hyang C:\WINDOWS\system32\heb.exe 
   C:\WINDOWS\SYSTEM32\CXBYQPRAYB.EXE PWS-Mmorpg.gen (Trojan)

< date< 6:01:07 PM Deleted hyang C:\WINDOWS\system32\heb.exe 
   C:\WINDOWS\system32\cxbyqprayb.exe\cxbyqprayb.exe\0000d500.EXE 
   PWS-Mmorpg.gen (Trojan)

< date< 6:01:08 PM Cleaned hyang C:\WINDOWS\system32\xybzqcaxyo.exe
   c:\windows\system32\de02f764.dll PWS-OnlineGames.s (Trojan)

As you can see from the log records, as soon as the JavaScript Trojan downloader succeeded downloading and saving the Trojan installer program heb.exe, this PWS Trojan tried to install multiple malicious programs on to the host system.

At the beginning, the installer program, heb.exe tried to install an executable file to the system folder with random file names like, PCAXYOQRXA.EXE. McAfee VirusScan was able to detect and delete 3 of them.

However within 2 seconds of trying, heb.exe managed to install 1 malicious program in the system folder: C:\WINDOWS\system32\xybzqcaxyo.exe. The last log record shows that xybzqcaxyo.exe was executed and it tried to install a malicious DLL file in the system folder.

Why McAfee VirusScan failed to stop the Trojan installer, heb.exe, saving this xybzqcaxyo.exe file in the system folder? I don't know the correct answer. But my guesses are: (1) xybzqcaxyo.exe did not contain any virus signature strings known to McAfee; (2) the Trojan fired too many file saving threads to jam the McAfee program and caused it to fail.

Last update: 2006.

Table of Contents

 About This Windows Security Book

 Windows 8: System Security Review

 Windows 8: System Security Protection

 Windows 8 System Recovery

 Windows 8 Defender for Real-Time Protection

 Windows 7: System Security Review

 Windows 7: System Security Protection

 Windows 7 System Recovery

 Windows 7 Forefront Client Security

 Norton Power Eraser - Anti-Virus Scan Tool

 McAfee Virus and Malware Protection Tools

 Spybot - Spyware Blocker, Detection and Removal

 Keeping Firefox Secure

 Keeping IE (Internet Explorer) Secure

 Malware (Adware, Spyware, Trojan, Worm, and Virus)

 HijackThis - Browser Hijacker Diagnosis Tool

 IE Add-on Program Listing and Removal

 "Conduit Search" - Malware Detection and Removal

 "Tube Dimmer", "Scorpion Saver" or "Adpeak" Malware

 Malware Manual Removal Experience

 Vundo (VirtuMonde/VirtuMundo) - vtsts.dll Removal

 Trojan and Malware "Puper" Description and Removal

 VSToolbar (VSAdd-in.dll) - Description and Removal

PWS (Password Stealer) Trojan Infection Removal

 What Is PWS (Password Stealer) Trojan?

 JS/Downloader.gen - JavaScript Downloader Malware

 PWS-Mmorpg.gen - A Password Stealer Trojan

heb.exe - The Trojan Installer Program

 .exe and .dll Files Installed by the Trojan

 my.exe - A Second PWS Trojan Infection

 .exe and .dll Files of the Second Trojan

 Explorer.EXE Trying to Install a Trojan

 AccessProtectionLog.txt Log File Records

 ATF-Cleaner.exe - Temporary File Remover

 Trajon Files Left in the System Folder

 Removing PWS Trojan Files

 Removing PWS Trojan Startup Entries

 Command Processor AutoRun - Registry Value

 UserInit - Winlogon Registry Key

 js.users.51.la - hosts File Entries

 Image File Execution Options - Registry Key

 regedit.exe Not Working

 MS08-001 Vulnerability on Windows Systems

 Antivirus System PRO

 References

 PDF Printing Version