Summary
Trojans are malicious programs that pretend be to benign. Trojans do not replicate themselves.
Removal
Based on the settings of your F-Secure security product, it will either move the file to the quarantine where it cannot spread or cause harm, or remove it.
A False Positive is when a file is incorrectly detected as harmful, usually because its code or behavior resembles known harmful programs. A False Positive will usually be fixed in a subsequent database update without any action needed on your part. If you wish, you may also:
Check for the latest database updates
First, check if your F-Secure security program is using the latest updates, then try scanning the file again.
Submit a sample
After checking, if you still believe the file is incorrectly detected, you can submit a sample of it for re-analysis.
Note: If the file was moved to quarantine, you need to collect the file from quarantine before you can submit it.
Exclude a file from further scanning
If you are certain that the file is safe and want to continue using it, you can exclude it from further scanning by the F-Secure security product.
Note: You need administrative rights to change the settings.
Technical Details
The malware's hosts file contains banking related search strings targeting a bank in the .mx Top Level Domain (TLD).
File System Changes
Creates these files:
- %temp%\win32.exe
- %windir%\system32\drivers\etc\hosts
Removes these files:
- %cwd%\sample.exe
- %windir%\system32\drivers\etc\hosts
Process Changes
Creates these processes:
- %programfiles%\Internet Explorer\IEXPLORE.EXE
Uses these temporary processes:
- %localsettings\Temp\win32.exe
Creates these mutexes:
- IEXPLORE.EXE: _SHuassist.mtx
- IEXPLORE.EXE: CritOpMutex
Network Connections
Attempts to download files from:
- https://bux.to/[REMOVED].php
Registry Modifications
Sets these values:
- HKCU\Software\Microsoft\Internet Explorer\Main FullScreen = no
- HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\\\UserAssist\{5E6AB780-7743-11CF-A12B-00AA004AE837}\Count HRZR_PGYFRFFVBA = \x94\x3F\x43\x0E\x28\x00\x00\x00
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