Analysis by: Carlos Villegas Madrid
ALIASES:

TrojanDownloader:O97M/Powdow.RX!MTB (MICROSOFT)

 PLATFORM:

Windows

 OVERALL RISK RATING:
 DAMAGE POTENTIAL:
 DISTRIBUTION POTENTIAL:
 REPORTED INFECTION:
 INFORMATION EXPOSURE:

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

Infection Channel: Downloaded from the Internet, Dropped by other malware

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.

  TECHNICAL DETAILS

File Size: 88,576 bytes
File Type: PPT
Memory Resident: No
Initial Samples Received Date: 03 May 2023
Payload: Connects to URLs/IPs, Drops files

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 folders:

  • %Temporary Internet Files%\Content.IE5YEFGVF95
  • %Temporary Internet Files%\Content.IE5NVUI4L47
  • %Temporary Internet Files%\Content.IE57KZJEKTK
  • %Temporary Internet Files%\Content.IE5BL7GWO8U

(Note: %Temporary Internet Files% is the Temporary Internet Files folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temporary Internet Files on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\AppData\Local\Microsoft\Windows\Temporary Internet Files on Windows Vista, 7 and 2008(64-bit), or C:\Users\{user name}\AppData\Local\Microsoft\Windows\INetCache on Windows 8, 8.1, 2012(64-bit) and 10(64-bit).)

It drops the following files:

  • %User Temp%\~{Random}.TMP
  • %User Temp%\VBE\MSForms.exd
  • %Application Data%\Microsoft\Office\Recent\{Malware File Name}.ppt.LNK
  • %Application Data%\Microsoft\Office\Recent\a.LNK
  • %Application Data%\Microsoft\Office\Recent\index.dat
  • %Application Data%\Microsoft\Office\VB12.pip
  • %Application Data%\Microsoft\Office\PowerP12.pip
  • %Application Data%\Microsoft\Windows\Cookies\{Username}@accounts.google[1].txt
  • %Temporary Internet Files%\Content.IE5\YEFGVF95\blogin[1].g
  • %Temporary Internet Files%\Content.IE5\YEFGVF95\281434096-static_pages[1].css
  • %Temporary Internet Files%\Content.IE5\NVUI4L47\maia[1].css
  • %Temporary Internet Files%\Content.IE5\7KZJEKTK\analytics[1].js
  • %Temporary Internet Files%\Content.IE5\BL7GWO8U\3101730221-analytics_autotrack[1].js
  • %Temporary Internet Files%\Content.IE5\YEFGVF95\css[1].txt
  • %Temporary Internet Files%\Content.IE5\NVUI4L47\css[1].txt
  • %Temporary Internet Files%\Content.IE5\7KZJEKTK\memSYaGs126MiZpBa-UvWbX2vVnXBbObj2OVZyOOSr4dVJWUgsiH0B4gaVY[1].eot
  • %Temporary Internet Files%\Content.IE5\BL7GWO8U\kJEjBvgX7BgnkSrUwT8UnLVc38YydejYY-oE_LvN[1].eot
  • %Temporary Internet Files%\Content.IE5\YEFGVF95\blogger-logotype-color-black-1x[1].png
  • %Temporary Internet Files%\Content.IE5\NVUI4L47\css[2].txt
  • %Temporary Internet Files%\Content.IE5\7KZJEKTK\error[1]
  • %Temporary Internet Files%\Content.IE5\BL7GWO8U\error[1]
  • %Temporary Internet Files%\Content.IE5\YEFGVF95\warning[1]
  • %Temporary Internet Files%\Content.IE5\NVUI4L47\KFOmCnqEu92Fr1Mu4mxO[1].eot
  • %Temporary Internet Files%\Content.IE5\NVUI4L47\pxiDypQkot1TnFhsFMOfGShVF9eK[1].eot
  • %Temporary Internet Files%\Content.IE5\7KZJEKTK\google_transparent_accounts[1].png

(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).. %Application Data% is the current user's Application Data folder, which is usually C:\Documents and Settings\{user name}\Application Data on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\AppData\Roaming on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).. %Temporary Internet Files% is the Temporary Internet Files folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temporary Internet Files on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\AppData\Local\Microsoft\Windows\Temporary Internet Files on Windows Vista, 7 and 2008(64-bit), or C:\Users\{user name}\AppData\Local\Microsoft\Windows\INetCache on Windows 8, 8.1, 2012(64-bit) and 10(64-bit).)

It adds the following processes:

  • mshta http://{BLOCKED}37%728748%728748%728748%728748%728748@j.mp/hdhksaasghdahjkdqtgwyetqsd

Other Details

This Trojan connects to the following possibly malicious URL:

  • https://{BLOCKED}s.google.com/ServiceLogin?passive=true&continue=https://www.{BLOCKED}r.com/blogin.g?blogspotURL%3Dhttps://{BLOCKED}aatresearchers.blogspot.com/p/seconddivine2.html%26type%3Dblog%26bpli%3D1&followup=https://www.{BLOCKED}er.com/blogin.g?blogspotURL%3Dhttps://{BLOCKED}aatresearchers.blogspot.com/p/seconddivine2.html%26type%3Dblog%26bpli%3D1&go=true
  • https://www.{BLOCKED}-analytics.com/analytics.js
  • https://www.{BLOCKED}r.com/blogin.g?blogspotURL=https://{BLOCKED}aatresearchers.blogspot.com/p/seconddivine2.html&type=blog
  • https://www.{BLOCKED}r.com/blogin.g?blogspotURL=https://{BLOCKED}aatresearchers.blogspot.com/p/seconddivine2.html&type=blog&bpli=1
  • http://{BLOCKED}.mp/hdhksaasghdahjkdqtgwyetqsd
  • https://www.{BLOCKED}r.com/img/blogger-logotype-color-black-1x.png
  • https://www.{BLOCKED}r.com/img/google_transparent_accounts.png
  • https://{BLOCKED}aaatresearchers.blogspot.com/p/seconddivine2.html
  • https://{BLOCKED}static.com/s/materialiconsextended/v149/kJEjBvgX7BgnkSrUwT8UnLVc38YydejYY-oE_LvN.eot
  • https://{BLOCKED}static.com/s/opensans/v35/memSYaGs126MiZpBa-UvWbX2vVnXBbObj2OVZyOOSr4dVJWUgsiH0B4gaVY.eot
  • https://{BLOCKED}static.com/s/productsans/v19/pxiDypQkot1TnFhsFMOfGShVF9eK.eot
  • https://{BLOCKED}static.com/s/roboto/v30/KFOmCnqEu92Fr1Mu4mxO.eot
  • https://www.{BLOCKED}r.com/static/v1/jsbin/3101730221-analytics_autotrack.js
  • https://www.{BLOCKED}r.com/static/v1/v-css/281434096-static_pages.css

  SOLUTION

Minimum Scan Engine: 9.800
FIRST VSAPI PATTERN FILE: 18.422.05
FIRST VSAPI PATTERN DATE: 03 May 2023
VSAPI OPR PATTERN File: 18.423.00
VSAPI OPR PATTERN Date: 04 May 2023

Step 1

Trend Micro Predictive Machine Learning detects and blocks malware at the first sign of its existence, before it executes on your system. When enabled, your Trend Micro product detects this malware under the following machine learning name:

     
    • Downloader.VBA.TRX.XXVBAF01FF040

Step 2

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 3

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 4

Search and delete this file

[ Learn More ]
There may be some files that are hidden. Please make sure you check the Search Hidden Files and Folders checkbox in the "More advanced options" option to include all hidden files and folders in the search result.
  • %ProgramData%\Microsoft\OFFICE\DaTa\opa12.dat
  • %User Temp%\~{Random}.TMP
  • %User Temp%\VBE\MSForms.exd
  • %Application Data%\Microsoft\Office\Recent\{Malware File Name}.ppt.LNK
  • %Application Data%\Microsoft\Office\Recent\a.LNK
  • %Application Data%\Microsoft\Office\Recent\index.dat
  • %Application Data%\Microsoft\Office\VB12.pip
  • %Application Data%\Microsoft\Office\PowerP12.pip
  • %Application Data%\Microsoft\Windows\Cookies\{Username}@accounts.google[1].txt
  • %Temporary Internet Files%\Content.IE5\YEFGVF95\blogin[1].g
  • %Temporary Internet Files%\Content.IE5\YEFGVF95\281434096-static_pages[1].css
  • %Temporary Internet Files%\Content.IE5\NVUI4L47\maia[1].css
  • %Temporary Internet Files%\Content.IE5\7KZJEKTK\analytics[1].js
  • %Temporary Internet Files%\Content.IE5\BL7GWO8U\3101730221-analytics_autotrack[1].js
  • %Temporary Internet Files%\Content.IE5\YEFGVF95\css[1].txt
  • %Temporary Internet Files%\Content.IE5\NVUI4L47\css[1].txt
  • %Temporary Internet Files%\Content.IE5\7KZJEKTK\memSYaGs126MiZpBa-UvWbX2vVnXBbObj2OVZyOOSr4dVJWUgsiH0B4gaVY[1].eot
  • %Temporary Internet Files%\Content.IE5\BL7GWO8U\kJEjBvgX7BgnkSrUwT8UnLVc38YydejYY-oE_LvN[1].eot
  • %Temporary Internet Files%\Content.IE5\YEFGVF95\blogger-logotype-color-black-1x[1].png
  • %Temporary Internet Files%\Content.IE5\NVUI4L47\css[2].txt
  • %Temporary Internet Files%\Content.IE5\7KZJEKTK\error[1]
  • %Temporary Internet Files%\Content.IE5\BL7GWO8U\error[1]
  • %Temporary Internet Files%\Content.IE5\YEFGVF95\warning[1]
  • %Temporary Internet Files%\Content.IE5\NVUI4L47\KFOmCnqEu92Fr1Mu4mxO[1].eot
  • %Temporary Internet Files%\Content.IE5\NVUI4L47\pxiDypQkot1TnFhsFMOfGShVF9eK[1].eot
  • %Temporary Internet Files%\Content.IE5\7KZJEKTK\google_transparent_accounts[1].png

Step 5

Search and delete these folders

[ Learn More ]
Please make sure you check the Search Hidden Files and Folders checkbox in the More advanced options option to include all hidden folders in the search result.
  • %Temporary Internet Files%\Content.IE5YEFGVF95
  • %Temporary Internet Files%\Content.IE5NVUI4L47
  • %Temporary Internet Files%\Content.IE57KZJEKTK
  • %Temporary Internet Files%\Content.IE5BL7GWO8U

Step 6

Scan your computer with your Trend Micro product to delete files detected as Trojan.O97M.POWLOAD.0NA103KP20. 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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