BKDR_ZXSHELL.WNZ
Trojan:Win32/Occamy.C (Microsoft), Trojan-Dropper.Win32.Agent (ikarus)
Windows
![](/vinfo/imgFiles/legend.jpg)
Threat Type: Backdoor
Destructiveness: No
Encrypted:
In the wild: Yes
OVERVIEW
This Backdoor 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
3,463,584 bytes
EXE
No
07 Aug 2018
Arrival Details
This Backdoor 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 Backdoor drops the following files:
- %Windows%\PROPSYS.dll
- %System%\imseo21.ime
- %Windows%\Help\DirectX.msc
- {Malware Path}\51FADBE.bat
(Note: %Windows% is the Windows folder, where it usually is C:\Windows on all Windows operating system versions.. %System% is the Windows system folder, where it usually is C:\Windows\System32 on all Windows operating system versions.)
It adds the following processes:
- C:\Windows\system32\Cacls.exe "C:\Windows\PROPSYS.dll" /E /G everyone:F
- C:\Windows\system32\Cacls.exe "C:\Windows\system32\imseo21.ime" /E /G everyone:F
- C:\Windows\system32\rundll32.exe "C:\Windows\system32\imseo21.ime",ProxyDll
- cmd /c C:\Users\{BLOCKED}er_732\Desktop\51FADBE.bat
Other Details
This Backdoor connects to the following possibly malicious URL:
- r2---sn-i3b7knld.{BLOCKED}1.com
SOLUTION
9.850
14.444.04
15 Aug 2018
14.445.00
16 Aug 2018
Step 1
Before doing any scans, Windows XP, Windows Vista, and Windows 7 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 these files
- %Windows%\PROPSYS.dll
- %System%\imseo21.ime
- %Windows%\Help\DirectX.msc
- {Malware Path}\51FADBE.bat
Step 4
Scan your computer with your Trend Micro product to delete files detected as BKDR_ZXSHELL.WNZ. 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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