PUA.Win32.HostChanger.F
BAT/HostsChanger.C (NOD32)
Windows
Threat Type: Potentially Unwanted Application
Destructiveness: No
Encrypted:
In the wild: Yes
OVERVIEW
This Potentially Unwanted Application arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.
TECHNICAL DETAILS
62,464 bytes
EXE
No
07 Apr 2022
Arrival Details
This Potentially Unwanted Application 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 Potentially Unwanted Application drops the following files:
- %User Temp%\{random}.tmp\{random}.bat
(Note: %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\AppData\Local\Temp on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).)
It adds the following processes:
- "%System%\cmd.exe" /c "%User Temp%\{random}.tmp\{random}.bat {Malware Path and Malware Filename}"
- FIND /C /I "cbs.{BLOCKED}.com" %System%\drivers\etc\hosts
- FIND /C /I "lwww.cbs.{BLOCKED}.com" >%System%\drivers\etc\hosts
- FIND /C /I "platform.{BLOCKED}.com" %System%\drivers\etc\hosts
- FIND /C /I "www.{BLOCKED}.com" %System%\drivers\etc\hosts
SOLUTION
9.800
2.505.00
07 Apr 2022
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
Search and delete this file
- %User Temp%\{random}.tmp\{random}.bat
Step 4
Scan your computer with your Trend Micro product to delete files detected as PUA.Win32.HostChanger.F. 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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