Analysis by: Maria Emreen Viray
ALIASES:

HEUR:Trojan.Win64.Miner.pef (KASPERSKY)

 PLATFORM:

Windows

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted: Yes

  • In the wild: Yes

  OVERVIEW

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.

It deletes the initially executed copy of itself.

  TECHNICAL DETAILS

File Size: 2,148,544 bytes
File Type: EXE
Memory Resident: Yes
Initial Samples Received Date: 18 Jun 2021

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 copies of itself into the affected system:

  • %System%\{String Name}.exe - where String Name can be any of the following:
    • about
    • account
    • activities
    • administration
    • advertised
    • along
    • always
    • always
    • areas
    • around
    • attend
    • Authentication
    • because
    • become
    • besides
    • both
    • capacity
    • ceremony
    • change
    • cloud
    • collecting
    • command
    • compromised
    • computer
    • constructive
    • consultants
    • cooperation
    • coverage
    • crime
    • crowded
    • cultural
    • culture
    • development
    • development
    • digital
    • disable
    • disaster
    • Dongpo
    • during
    • energy
    • ensure
    • escalated
    • even
    • Even
    • event
    • Falcon
    • Falcon
    • featuring
    • festivals
    • figure
    • financial
    • firewalls
    • First
    • first
    • former
    • forum
    • found
    • from
    • gotten
    • governments
    • historical
    • hotbed
    • imagine
    • improve
    • inadequate
    • information
    • innovation
    • installed
    • international
    • learn
    • legendary
    • line
    • machine
    • management
    • manager
    • may
    • Meanwhile
    • memorial
    • more
    • needtemporarily
    • neglect
    • notice
    • obvious
    • often
    • often
    • opening
    • opening
    • past
    • people
    • performances
    • poverty
    • pretty
    • prevention
    • product
    • products
    • programs
    • proper
    • provided
    • quality
    • quickly
    • realize
    • recently
    • recorded
    • related
    • residence
    • response
    • result
    • routes
    • running
    • sanitation
    • scenario
    • scientific
    • Sensor
    • sensor
    • services
    • silently
    • sites
    • skeptical
    • Slums
    • slums
    • special
    • strengthening
    • such
    • suffer
    • suggestions
    • sure
    • sustainable
    • technological
    • temple
    • there
    • those
    • thought
    • through
    • tintr
    • tools
    • tourist
    • transformation
    • turn
    • turned
    • turning
    • uninstall
    • uninstall
    • unwilling
    • visit
    • watch
    • when
    • which
    • wireless
    • your
    • yourself
  • %System%\wostmp\{random numbers}

(Note: %System% is the Windows system folder, where it usually is C:\Windows\System32 on all Windows operating system versions.)

It drops the following files:

  • %Windows%\Swil\prologs
  • %System%\LogFiles\baple.exe → Renamed Downloaded File.
  • %System%\mops\baple.exe → Copy of Renamed Downloaded File.
  • %System%\Speech\{Random Numbers} → Copy of Renamed Downloaded File.
  • Dropped by Renamed Downloaded File:
    • %System%\LogFiles\ccSvcHosts.exe → Dropped Coinminer.
    • %System%\LogFiles\ccSvcHostse.exe → Dropped Coinminer.
    • %System%\LogFiles\dump
    • %System%\LogFiles\dump1
    • %System%\LogFiles\dump3
    • %System%\LogFiles\tune_config
    • %System%\LogFiles\libcrypto-1_1-x64.dll
    • %System%\LogFiles\libcurl-4.dll
    • %System%\LogFiles\libgcc_s_seh-1.dll
    • %System%\LogFiles\libstdc++-6.dll
    • %System%\LogFiles\libwinpthread-1.dll
    • %System%\LogFiles\WinRing0x64.sys
    • %System%\LogFiles\zlib1.dll
    • %System%\mops\ccSvcHosts.exe → Copy of Dropped Coinminer.
    • %System%\mops\ccSvcHostse.exe → Copy of Dropped Coinminer.
    • %System%\mops\dump
    • %System%\mops\dump1
    • %System%\mops\dump3
    • %System%\mops\libcrypto-1_1-x64.dll
    • %System%\mops\libcurl-4.dll
    • %System%\mops\libgcc_s_seh-1.dll
    • %System%\mops\libstdc++-6.dll
    • %System%\mops\libwinpthread-1.dll
    • %System%\mops\tune_config
    • %System%\mops\WinRing0x64.sys
    • %System%\mops\zlib1.dll

(Note: %Windows% is the Windows folder, where it usually is C:\Windows on all Windows operating system versions.. %System% is the Windows system folder, where it usually is C:\Windows\System32 on all Windows operating system versions.)

It adds the following processes:

  • %System%\{String Name}.exe {Service Name}
  • %System%\LogFiles\baple.exe allbit32 wxp|w2003 mwrite:0 ewrite:0 twrite:0 size:0 newrun:1 flag:2 c:3 stopwork:nope "{Base64 encoded string}" "25|{Base64 encoded string}" "25|{Base64 encoded string}" "{Base64 encoded string}" "{Base64 encoded string}" "xmIg" "{Base64 encoded string}"
  • %System%\mops\baple.exe allbit32 wxp|w2003 mwrite:0 ewrite:0 twrite:0 size:0 newrun:1 flag:2 c:3 stopwork:nope "{Base64 encoded string}" "25|{Base64 encoded string}" "25|{Base64 encoded string}" "{Base64 encoded string}" "{Base64 encoded string}" "xmIg" "{Base64 encoded string}"
  • %System%\LogFiles\ccSvcHosts.exe -a gr -o stratum+tcp://{BLOCKED}.{BLOCKED}.150.191:7056 -u RGnYuvVTZCX7FqWEtnvYCudZN3LBbTrDoN -p c=RTM -t {Number of Threads}
  • %System%\LogFiles\ccSvcHostse.exe -a gr -o stratum+tcp://{BLOCKED}.{BLOCKED}.150.191:7056 -u RGnYuvVTZCX7FqWEtnvYCudZN3LBbTrDoN -p c=RTM -t {Number of Threads}
  • %System%\mops\ccSvcHosts.exe -a gr -o stratum+tcp://{BLOCKED}.{BLOCKED}.150.191:7056 -u RGnYuvVTZCX7FqWEtnvYCudZN3LBbTrDoN -p c=RTM -t {Number of Threads}
  • %System%\mops\ccSvcHostse.exe -a gr -o stratum+tcp://{BLOCKED}.{BLOCKED}.150.191:7056 -u RGnYuvVTZCX7FqWEtnvYCudZN3LBbTrDoN -p c=RTM -t {Number of Threads}

It creates the following folders:

  • %Fonts%\clientdb
  • %Fonts%\clientdb\ds
  • %Fonts%\clientdb\gt
  • %Fonts%\MSBuild
  • %System%\wostmp
  • %System%\mops\
  • %Windows%\Swil\

(Note: %Fonts% is the Windows Fonts folder, which is usually C:\Window\Fonts on Windows 2000(32-bit), XP, Server 2003(32-bit), Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).. %System% is the Windows system folder, where it usually is C:\Windows\System32 on all Windows operating system versions.. %Windows% is the Windows folder, where it usually is C:\Windows on all Windows operating system versions.)

Other System Modifications

This Trojan modifies the following registry entries:

HKEY_CLASSES_ROOT\SHTinfo
comment = {Malware Defined Values}

HKEY_CLASSES_ROOT\SHTinfo
intranet = {Malware Defined Values}

HKEY_CLASSES_ROOT\SHTinfo
notice = {Malware Defined Values}

HKEY_CLASSES_ROOT\SHTinfo
peer = {Malware Defined Values}

HKEY_CLASSES_ROOT\SHTinfo
sha1 = {Malware Defined Values}

HKEY_CLASSES_ROOT\SHTinfo
staticpeer = {Malware Defined Values}

HKEY_CLASSES_ROOT\SHTinfo
tunnel = {Malware Defined Values}

Download Routine

This Trojan saves the files it downloads using the following names:

  • %Fonts%\clientdb\gt\{Hash of Downloaded File}
  • %Fonts%\clientdb\ds\{Hash of Downloaded File}

(Note: %Fonts% is the Windows Fonts folder, which is usually C:\Window\Fonts on Windows 2000(32-bit), XP, Server 2003(32-bit), Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).)

Information Theft

This Trojan gathers the following data:

  • Computer Name
  • Username
  • CPU Information
  • Local Time

Other Details

This Trojan adds the following registry keys:

HKEY_CLASSES_ROOT\SHTinfo

It does the following:

  • It adds and runs the following services:
    • Service Name: {random}
      BinPath: %System%\{String Name}.exe {Service Name}
  • It uses the following uncommon ports:
    • 27930
  • It sends UDP packets to any of the following IP addresses within the network range:
    • 114.{BLOCKED}.1 up to 114.{BLOCKED}.255
    • 115.{BLOCKED}.1 up to 115.{BLOCKED}.255
    • 115.{BLOCKED}.1 up to 115.{BLOCKED}.255
    • 116.{BLOCKED}.1 up to 116.{BLOCKED}.255
    • 117.{BLOCKED}.1 up to 117.{BLOCKED}.255
    • 117.{BLOCKED}.1 up to 117.{BLOCKED}.255
    • 120.{BLOCKED}.1 up to 120.{BLOCKED}.255
    • 121.{BLOCKED}.1 up to 121.{BLOCKED}.255
    • 122.{BLOCKED}.1 up to 122.{BLOCKED}.255
    • 122.{BLOCKED}.1 up to 122.{BLOCKED}.255
    • 124.{BLOCKED}.1 up to 124.{BLOCKED}.255
    • 163.{BLOCKED}.1 up to 163.{BLOCKED}.255
    • 168.{BLOCKED}.1 up to 168.{BLOCKED}.255
    • 172.{BLOCKED}.1 up to 172.{BLOCKED}.255
    • 177.{BLOCKED}.1 up to 177.{BLOCKED}.255
    • 180.{BLOCKED}.1 up to 180.{BLOCKED}.255
    • 182.{BLOCKED}.1 up to 182.{BLOCKED}.255
    • 182.{BLOCKED}.1 up to 182.{BLOCKED}.255
    • 182.{BLOCKED}.1 up to 182.{BLOCKED}.255
    • 182.{BLOCKED}.1 up to 182.{BLOCKED}.255
    • 183.{BLOCKED}.1 up to 183.{BLOCKED}.255
    • 183.{BLOCKED}.1 up to 183.{BLOCKED}.255
    • 188.{BLOCKED}.1 up to 188.{BLOCKED}.255
    • 197.{BLOCKED}.1 up to 197.{BLOCKED}8.255
    • 197.{BLOCKED}.1 up to 197.{BLOCKED}.255
    • 197.{BLOCKED}.1 up to 197.{BLOCKED}.255
    • 202.{BLOCKED}.1 up to 202.{BLOCKED}.255
    • 202.{BLOCKED}.1 up to 202.{BLOCKED}.255
    • 203.{BLOCKED}.1 up to 203.{BLOCKED}.255
    • 203.{BLOCKED}.1 up to 203.{BLOCKED}.255
    • 218.{BLOCKED}.1 up to 218.{BLOCKED}.255
    • 219.{BLOCKED}.1 up to 219.{BLOCKED}.255
    • 104.{BLOCKED}.0 up to 104.{BLOCKED}.255
    • 98.{BLOCKED}.0 up to 98.{BLOCKED}.255
    • 104.{BLOCKED}.0 up to 104.{BLOCKED}.255
    • 14.{BLOCKED}.0 up to 14.{BLOCKED}.255
    • 27.{BLOCKED}.0 up to 27.{BLOCKED}.255
    • 47.{BLOCKED}.0 up to 47.{BLOCKED}.255
    • 36.{BLOCKED}.0 up to 36.{BLOCKED}.255
    • 43.{BLOCKED}.0 up to 43.{BLOCKED}.255
    • 45.{BLOCKED}.0 up to 45.{BLOCKED}.255
    • 46.{BLOCKED}.0 up to 46.{BLOCKED}.255
    • 58.{BLOCKED}.0 up to 58.{BLOCKED}.255
    • 59.{BLOCKED}.0 up to 59.{BLOCKED}.255
    • 61.{BLOCKED}.0 up to 61.{BLOCKED}.255
    • 61.{BLOCKED}.0 up to 61.{BLOCKED}.255
    • 82.{BLOCKED}.0 up to 82.{BLOCKED}.255
    • 47.{BLOCKED}.0 up to 47.{BLOCKED}.255
    • 93.{BLOCKED}.0 up to 93.{BLOCKED}.255
    • 94.{BLOCKED}.0 up to 94.{BLOCKED}.255
    • 142.{BLOCKED}.0 up to 142.{BLOCKED}.255
    • 95.{BLOCKED}.0 up to 95.{BLOCKED}.255
    • 47.{BLOCKED}.0 up to 47.{BLOCKED}.255
    • 103.{BLOCKED}.0 up to 103.{BLOCKED}.255
    • 109.{BLOCKED}.0 up to 109.{BLOCKED}.255
    • 108.{BLOCKED}.0 up to 108.{BLOCKED}.255
    • 149.{BLOCKED}.0 up to 149.{BLOCKED}.255
    • 47.{BLOCKED}.0 up to 47.{BLOCKED}.255
    • 112.{BLOCKED}.0 up to 112.{BLOCKED}.255
    • 113.{BLOCKED}.0 up to 113.{BLOCKED}.255
    • 113.{BLOCKED}.0 up to 113.{BLOCKED}.255
    • 113.{BLOCKED}.0 up to 113.{BLOCKED}.255
    • 115.{BLOCKED}.0 up to 115.{BLOCKED}.255
    • 47.{BLOCKED}.0 up to 47.{BLOCKED}.255
    • 116.{BLOCKED}.0 up to 116.{BLOCKED}.255
    • 117.{BLOCKED}.0 up to 117.{BLOCKED}.255
    • 117.{BLOCKED}.0 up to 117.{BLOCKED}.255
    • 107.{BLOCKED}.0 up to 107.{BLOCKED}.255
    • 117.{BLOCKED}.0 up to 117.{BLOCKED}.255
    • 47.{BLOCKED}.0 up to 47.{BLOCKED}.255
    • 120.{BLOCKED}.0 up to 120.{BLOCKED}.255
    • 121.{BLOCKED}.0 up to 121.{BLOCKED}.255
    • 122.{BLOCKED}.0 up to 122.{BLOCKED}.255
    • 122.{BLOCKED}.0 up to 122.{BLOCKED}.255
    • 123.{BLOCKED}.0 up to 123.{BLOCKED}.255
    • 47.{BLOCKED}.0 up to 47.{BLOCKED}.255
    • 124.{BLOCKED}.0 up to 124.{BLOCKED}.255
    • 128.{BLOCKED}.0 up to 128.{BLOCKED}.255
    • 159.{BLOCKED}.0 up to 159.{BLOCKED}.255
    • 171.{BLOCKED}.0 up to 171.{BLOCKED}.255
    • 177.{BLOCKED}.0 up to 177.{BLOCKED}0.255
    • 149.{BLOCKED}.0 up to 149.{BLOCKED}.255
    • 180.{BLOCKED}.0 up to 180.{BLOCKED}.255
    • 182.{BLOCKED}.0 up to 182.{BLOCKED}.255
    • 182.{BLOCKED}.0 up to 172.{BLOCKED}.255
    • 182.{BLOCKED}.0 up to 182.{BLOCKED}.255
    • 108.{BLOCKED}.0 up to 108.{BLOCKED}.255
    • 183.{BLOCKED}.0 up to 183.{BLOCKED}.255
    • 115.{BLOCKED}.0 up to 115.{BLOCKED}.255
    • 183.{BLOCKED}.0 up to 183.{BLOCKED}.255
    • 184.{BLOCKED}.0 up to 184.{BLOCKED}.255
    • 108.{BLOCKED}.0 up to 108.{BLOCKED}.255
    • 197.{BLOCKED}.0 up to 197.{BLOCKED}.255
    • 197.{BLOCKED}.0 up to 197.{BLOCKED}.255
    • 197.{BLOCKED.0 up to 197.{BLOCKED.255
    • 47.{BLOCKED.0 up to 47.{BLOCKED}.255
    • 202.{BLOCKED}.0 up to 202.{BLOCKED}.255
    • 203.{BLOCKED}.0 up to 203.{BLOCKED}.255
    • 203.{BLOCKED}.0 up to 203.{BLOCKED}.255
    • 220.{BLOCKED}.0 up to 220.{BLOCKED}.255
  • It searches and gather data found in the following files:
    • C:\1i.txt
    • C:\1p.txt
    • C:\1f.txt
    • D:\1i.txt
    • D:\1p.txt
    • D:\1f.txt
    • C:\Windows\1i.txt
    • C:\Windows\1p.txt
    • C:\Windows\1f.txt

It deletes the initially executed copy of itself.

  SOLUTION

Minimum Scan Engine: 9.800
FIRST VSAPI PATTERN FILE: 16.130.05
FIRST VSAPI PATTERN DATE: 28 Jul 2020
VSAPI OPR PATTERN File: 16.131.00
VSAPI OPR PATTERN Date: 29 Jul 2020

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:

     
    • Troj.Win32.TRX.XXPE50FFF045

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

Restart in Safe Mode

[ Learn More ]

Step 5

Disable this malware service

[ Learn More ]
  • {Random}

Step 6

Delete this registry value

[ Learn More ]

Important: Editing the Windows Registry incorrectly can lead to irreversible system malfunction. Please do this step only if you know how or you can ask assistance from your system administrator. Else, check this Microsoft article first before modifying your computer's registry.

  • In HKEY_CLASSES_ROOT\SHTinfo
    • comment = {Malware Defined Values}
  • In HKEY_CLASSES_ROOT\SHTinfo
    • intranet = {Malware Defined Values}
  • In HKEY_CLASSES_ROOT\SHTinfo
    • notice = {Malware Defined Values}
  • In HKEY_CLASSES_ROOT\SHTinfo
    • peer = {Malware Defined Values}
  • In HKEY_CLASSES_ROOT\SHTinfo
    • sha1 = {Malware Defined Values}
  • In HKEY_CLASSES_ROOT\SHTinfo
    • staticpeer = {Malware Defined Values}
  • In HKEY_CLASSES_ROOT\SHTinfo
    • tunnel = {Malware Defined Values}

Step 7

Delete this registry key

[ Learn More ]

Important: Editing the Windows Registry incorrectly can lead to irreversible system malfunction. Please do this step only if you know how or you can ask assistance from your system administrator. Else, check this Microsoft article first before modifying your computer's registry.

  • In HKEY_CLASSES_ROOT\SHTinfo

Step 8

Search and delete these files

[ 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.
  • %Windows%\Swil\prologs
  • %System%\LogFiles\baple.exe
  • %System%\mops\baple.exe
  • %System%\Speech\{Random Numbers}
  • %System%\LogFiles\ccSvcHostse.exe
  • %System%\LogFiles\tune_config
  • %System%\LogFiles\libcrypto-1_1-x64.dll
  • %System%\LogFiles\libcurl-4.dll
  • %System%\LogFiles\libgcc_s_seh-1.dll
  • %System%\LogFiles\libstdc++-6.dll
  • %System%\LogFiles\libwinpthread-1.dll
  • %System%\LogFiles\WinRing0x64.sys
  • %System%\LogFiles\zlib1.dll
  • %System%\mops\ccSvcHostse.exe
  • %System%\mops\libcrypto-1_1-x64.dll
  • %System%\mops\libcurl-4.dll
  • %System%\mops\libgcc_s_seh-1.dll
  • %System%\mops\libstdc++-6.dll
  • %System%\mops\libwinpthread-1.dll
  • %System%\mops\tune_config
  • %System%\mops\WinRing0x64.sys
  • %System%\mops\zlib1.dll

Step 9

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.
  • %Fonts%\clientdb
  • %Fonts%\clientdb\ds
  • %Fonts%\clientdb\gt
  • %Fonts%\MSBuild
  • %System%\wostmp
  • %System%\mops\
  • %Windows%\Swil\

Step 10

Restart in normal mode and scan your computer with your Trend Micro product for files detected as Trojan.Win64.VICERCON.SMA. 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 this Knowledge Base page for more information.


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