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Worm.Win32.MALXMR.TIAOODFX

April 28, 2022
 Analysis by: Mc Justine De Guzman
 PLATFORM:

Windows

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

  • Threat Type: Worm

  • Destructiveness: No

  • Encrypted: No

  • In the wild: Yes

  OVERVIEW

Infection Channel:

Downloaded from the Internet, Dropped by other malware


This Worm 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:

1,033,460 bytes

File Type:

EXE

Memory Resident:

No

Initial Samples Received Date:

18 May 2018

Payload:

Connects to URLs/IPs, Drops files

Arrival Details

This Worm 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 Worm drops the following copies of itself into the affected system and executes them:

  • %Application Data%\Temps\DOC001.exe

(Note: %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).)

It drops the following files:

  • %Application Data%\Temps\NsCpuCNMiner32.exe
  • %Application Data%\Temps\NsCpuCNMiner64.exe
  • %Application Data%\Temps\nsr{random characters}.temp\inetc.dll
  • %User Temp%\java.exe
  • %User Temp%\java12.exe
  • %User Temp%\buff2.exe
  • %User Temp%\VID.exe
  • %ProgramData%\{21112319-2111-2111-211123196396}\lsm.exe
  • %User Temp%\dhelper.exe
  • %User Temp%\Javatemp\__tmp_rar_sfx_access_check_1227259
  • %User Temp%\Javatemp\jar2.exe
  • %User Temp%\Javatemp\jare.7z1
  • %User Temp%\Javatemp\temp.7z1
  • %User Temp%\oneplus.exe
  • %User Temp%\Javatemp\ini.jwd
  • %User Temp%\nsr{random characters}.temp\nsExec.dll
  • %Application Data%\cppredistx86.exe
  • %Application Data%\dhelper.exe
  • %Application Data%\TempoRX\VID001.exe
  • %Application Data%\TempoRX\uihost32.exe
  • %Application Data%\TempoRX\uihost64.exe
  • %User Temp%\javarx.exe
  • %User Temp%\javarx2.exe
  • %ProgramData%\{91140305-9114-9114-911403053998}\lsm.exe
  • %User Temp%\sysFile.exe
  • {Available Drives}\DOC001.exe
  • {Available Drives}\VID001.exe

(Note: %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).. %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).. %ProgramData% is a version of the Program Files folder where any user on a multi-user computer can make changes to programs. This contains application data for all users. This is usually C:\ProgramData on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit), or C:\Documents and Settings\All Users on Windows Server 2003(32-bit), 2000(32-bit) and XP.)

It adds the following processes:

  • %Application Data%\Temps\DOC001.exe
  • %User Temp%\java.exe -pJavajre_set7z
  • %System%\cmd.exe /c taskkill /f /im lsm.exe
  • %User Temp%\java12.exe -pJavajre_set8z
  • %User Temp%\buff2.exe -pBuff2jre_set7z
  • %System%\schtasks.exe /create /sc minute /f /tn "Microsoft LocalManager[Windows 7 Ultimate]" /tr "%ProgramData%\{21112319-2111-2111-211123196396}\lsm.exe"
  • %User Temp%\buff2.exe -pBuff2jre_set7z
  • %User Temp%\VID.exe -pJavajre_set7z
  • %Application Data%\TempoRX\VID001.exe
  • %User Temp%\dhelper.exe -pJavajre_set7z
  • %User Temp%\Javatemp\jar2.exe
  • cmd /C copy /b %temp%\Javatemp\ini.jwd %Application Data%\cppredistx86.exe
  • cmd /C copy /b %temp%\Javatemp\jare.7z1 + %temp%\Javatemp\temps.7z1 %Application Data%\dhelper.exe
  • taskkill /f /im dhelper.exe
  • %Application Data%\dhelper.exe
  • %User Temp%\javarx2.exe -pJavajre_set8z
  • %System%\schtasks.exe /create /sc minute /f /tn "Microsoft LocalManager[Windows 7 Ultimate]" /tr "%ProgramData%\{21112319-2111-2111-211123196396}\lsm.exe"
  • %System%\cmd.exe /c %User Temp%\sysFile.exe
  • taskkill /f /im NsCpuCNMiner*
  • taskkill /f /im IMG0*
  • %Application Data%\Temps\NsCpuCNMiner32.exe -o stratum+tcp://us-nbr.4{BLOCKED}r.me:3334 -a cryptonight-heavy -u N89ZFjXzNaEbasDFHX1GyoX2PQ2yxQvxP9YSKYXg46tj1DSHMdUHx7X5oCUdW1GiExNMJmGHtLf6qNGGjhPwDe2H5zcU9rj -p w=Rig1 -k -o loki:5 -u 1 -p x

It creates the following folders:

  • %Application Data%\Temps
  • %ProgramData%\{21112319-2111-2111-211123196396}
  • %Application Data%\TempoRX
  • %User Temp%\Javatemp
  • %User Temp%\nsr{random characters}.temp
  • %ProgramData%\{91140305-9114-9114-911403053998}

(Note: %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).. %ProgramData% is a version of the Program Files folder where any user on a multi-user computer can make changes to programs. This contains application data for all users. This is usually C:\ProgramData on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit), or C:\Documents and Settings\All Users on Windows Server 2003(32-bit), 2000(32-bit) and XP.. %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).)

Autostart Technique

This Worm drops the following files:

  • %User Startup%\explorer.lnk -> points to %Application Data%\Temps\DOC001.exe

(Note: %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).)

Download Routine

This Worm connects to the following website(s) to download and execute a malicious file:

  • http://k{BLOCKED}s.ru/java.dat
  • http://z{BLOCKED}p.ru/java12.dat
  • http://u.f{BLOCKED}y.com/buff2.dat
  • http://u.f{BLOCKED}y.com/VID.dat
  • http://{BLOCKED}.co/1Lan77
  • http://u.f{BLOCKED}y.com/dhelper.dat
  • http://i{BLOCKED}d.pw/ioad.exe
  • http://u.f{BLOCKED}1y.com/oneplus.dat

  SOLUTION

Minimum Scan Engine:

9.800

FIRST VSAPI PATTERN FILE:

17.528.06

FIRST VSAPI PATTERN DATE:

26 Apr 2022

VSAPI OPR PATTERN File:

17.529.00

VSAPI OPR PATTERN Date:

27 Apr 2022

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

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.
  • %Application Data%\Temps\DOC001.exe
  • %Application Data%\Temps\NsCpuCNMiner32.exe
  • %Application Data%\Temps\NsCpuCNMiner64.exe
  • %User Startup%\explorer.lnk
  • %Application Data%\Temps\nsr{random characters}.temp\inetc.dll
  • %User Temp%\java.exe
  • %User Temp%\java12.exe
  • %User Temp%\buff2.exe
  • %User Temp%\VID.exe
  • %ProgramData%\{21112319-2111-2111-211123196396}\lsm.exe
  • %User Temp%\dhelper.exe
  • %User Temp%\Javatemp\__tmp_rar_sfx_access_check_1227259
  • %User Temp%\Javatemp\jar2.exe
  • %User Temp%\Javatemp\jare.7z1
  • %User Temp%\Javatemp\temp.7z1
  • %User Temp%\oneplus.exe
  • %User Temp%\Javatemp\ini.jwd
  • %User Temp%\nsr{random characters}.temp\nsExec.dll
  • %Application Data%\cppredistx86.exe
  • %Application Data%\dhelper.exe
  • %Application Data%\TempoRX\VID001.exe
  • %Application Data%\TempoRX\uihost32.exe
  • %Application Data%\TempoRX\uihost64.exe
  • %User Temp%\javarx.exe
  • %User Temp%\javarx2.exe
  • %ProgramData%\{91140305-9114-9114-911403053998}\lsm.exe
  • %User Temp%\sysFile.exe
  • {Available Drives}\DOC001.exe
  • {Available Drives}\VID001.exe

Step 4

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.
  • %Application Data%\Temps
  • %ProgramData%\{21112319-2111-2111-211123196396}
  • %Application Data%\TempoRX
  • %User Temp%\Javatemp
  • %User Temp%\nsr{random characters}.temp
  • %ProgramData%\{91140305-9114-9114-911403053998}

Step 5

Scan your computer with your Trend Micro product to delete files detected as Worm.Win32.MALXMR.TIAOODFX. 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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