TrojanSpy.Win32.FAUXPERSKY.AA
Windows
![](/vinfo/imgFiles/legend.jpg)
Threat Type: Trojan Spy
Destructiveness: No
Encrypted: No
In the wild: Yes
OVERVIEW
Downloaded from the Internet, Dropped by other malware
This Trojan Spy arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.
It connects to certain websites to send and receive information.
TECHNICAL DETAILS
881,152 bytes
EXE
No
08 Feb 2023
Connects to URLs/IPs, Collects system information, Steals information, Deletes files
Arrival Details
This Trojan Spy 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 Spy adds the following processes:
- %System%\cmd.exe /c ping -n 1 -w 1000 www.google.com.my>Ping.sb → checks internet connection
- {Malware file path}\winlogin.exe → if not running in the system
- %AppData%\Temp.exe → if file is downloaded successfully
Other System Modifications
This Trojan Spy deletes the following files:
- {Malware file path}\S_Core.txt
- {Malware file path}\S_CMD.txt
- {Malware file path}\S_PTC.txt
Process Termination
This Trojan Spy terminates the following processes if found running in the affected system's memory:
- msiexec.exe
Download Routine
This Trojan Spy accesses the following websites to download files:
- https://kasperskypure.{BLOCKED}pp.com/S_Core.txt
- https://kasperskypure.{BLOCKED}pp.com/S_CMD.txt
- https://kasperskypure.{BLOCKED}pp.com/S_PTC.txt
- https://kasperskypure.{BLOCKED}pp.com/spoolsvc.exe → downloaded to update existing files in the system
- https://kasperskypure.{BLOCKED}pp.com/Temp.exe → downloaded to update existing files in the system
It saves the files it downloads using the following names:
- {Malware file path}\S_Core.txt
- {Malware file path}\S_CMD.txt
- {Malware file path}\S_PTC.txt
- {Malware file path}\spoolsvc.exe
- %AppData%\Temp.exe
Information Theft
This Trojan Spy gathers the following data:
- OS Version
- Computer Name
- User Name
- IP Address
- Content:
- Update number of downloaded files, spoolsvc.exe and Temp.exe
- Success message if execution of downloaded files are successful
Other Details
This Trojan Spy connects to the following URL(s) to check for an Internet connection:
- www.google.com.my
It connects to the following website to send and receive information:
- https://docs.google.com/forms/d/e/{BLOCKED}LSe6oGStKSshScVonAyCVFOrhANSfnmm0Im-aabnBX5ZjLabbA/viewform?entry.{BLOCKED}914=%A_OSVersion%&entry.{BLOCKED}477=%A_ComputerName%&entry.{BLOCKED}695=%A_UserName%&entry.{BLOCKED}0660=%A_IPAddress1%
It does the following:
- It checks the contents of Ping.sb if it contains the string "could not find".
- If found, it repeatedly checks for internet connection.
- It checks if all the components of the malware are already running.
- It checks if the following files are present in the directory where the sample is located:
- winlogin.exe → executed if found
- spoolsvc.exe
- If found:
- It compares the last update time of spoolsvc.exe with S_Core.txt.
- If outdated, it downloads the updated version of the file.
- If found:
- Temp.exe
- It downloads the file if not found.
- It compares the last update time of Temp.exe with S_CMD.txt.
- If outdated, it downloads the updated version of the file.
- {Malware file path}\spoolsvc.exe
- %AppData%\Temp.exe
SOLUTION
9.800
18.254.03
13 Feb 2023
18.255.00
14 Feb 2023
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
Note that not all files, folders, and registry keys and entries are installed on your computer during this malware's/spyware's/grayware's execution. This may be due to incomplete installation or other operating system conditions. If you do not find the same files/folders/registry information, please proceed to the next step.
Step 3
Identify and terminate files detected as TrojanSpy.Win32.FAUXPERSKY.AA
- 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
Search and delete these files
- {Malware file path}\Ping.sb
- {Malware file path}\S_Core.txt
- {Malware file path}\S_CMD.txt
- {Malware file path}\S_PTC.txt
- {Malware file path}\spoolsvc.exe
- %AppData%\Temp.exe
Step 5
Scan your computer with your Trend Micro product to delete files detected as TrojanSpy.Win32.FAUXPERSKY.AA. 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 the following Trend Micro Support pages for more information:
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