Trojan.BAT.POWLOAD.TIAOEJV
Trojan.PowerShell.Agent (IKARUS); PowerShell/Rozena.AF trojan (NOD32); PowerShell/Rozena.AF!tr (FORTINET)
Windows
Threat Type: Trojan
Destructiveness: No
Encrypted: Yes
In the wild: Yes
OVERVIEW
Downloaded from the Internet
This Trojan arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.
As of this writing, the said sites are inaccessible.
TECHNICAL DETAILS
7,094 bytes
BAT
Yes
23 Jan 2020
Connects to URLs/IPs
Arrival Details
This Trojan 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 drops the following files:
- %User Temp%\{Random Filename 3}.tmp
- %User Temp%\{Random Filename 2}.tmp
- %User Temp%\{Random Filename 1}.0.cs
- %User Temp%\{Random Filename 1}.cmdline
- %User Temp%\{Random Filename 1}.dll
- %User Temp%\{Random Filename 1}.err
- %User Temp%\{Random Filename 1}.out
- %User Temp%\{Random Filename 1}.pdb
- %User Temp%\{Random Filename 1}.tmp
(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:
- %Windows%\Microsoft.NET\Framework\v2.0.50727\cvtres.exe /NOLOGO /READONLY /MACHINE:IX86 "/OUT:%User Temp%\{Random Filename 2}.tmp" "%User Temp%\{Random Filename 3}.tmp"
- %Windows%\Microsoft.NET\Framework\v2.0.50727\csc.exe /noconfig /fullpaths @"%User Temp%\{Random Filename 1}.cmdline"
(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).)
Download Routine
This Trojan connects to the following website(s) to download and execute a malicious file:
- {BLOCKED}.{BLOCKED}.2.15:4444
As of this writing, the said sites are inaccessible.
SOLUTION
9.850
15.638.08
23 Jan 2020
15.639.00
24 Jan 2020
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 Trojan.BAT.POWLOAD.TIAOEJV
- 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 this file
- %User Temp%\{Random Filename 3}.tmp
- %User Temp%\{Random Filename 2}.tmp
- %User Temp%\{Random Filename 1}.0.cs
- %User Temp%\{Random Filename 1}.cmdline
- %User Temp%\{Random Filename 1}.dll
- %User Temp%\{Random Filename 1}.err
- %User Temp%\{Random Filename 1}.out
- %User Temp%\{Random Filename 1}.pdb
- %User Temp%\{Random Filename 1}.tmp
Step 5
Scan your computer with your Trend Micro product to delete files detected as Trojan.BAT.POWLOAD.TIAOEJV. 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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