Analysis

  • max time kernel
    138s
  • max time network
    146s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231023-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231023-enlocale:en-usos:windows10-2004-x64system
  • submitted
    12/11/2023, 16:25

General

  • Target
    316801558730488.js
  • Size 1.3MB
  • Sample231112-txc48shd68
  • SHA256 e896bbf849048589fe0b467dfef4e2803e46bcec51f6b91a5c402452653e581c
  • MD5 SHA1 SHA512 SSDEEP
Score
10/10

Malware Config

Extracted

Family
  • strela

C2
  • 193.109.85.77

Signatures

  • Strela

    An info stealer targeting mail credentials first seen in late 2022.

  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Loads dropped DLL 1 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • Suspicious use of WriteProcessMemory 8 IoCs

Processes

  • C:\Windows\system32\wscript.exe
    wscript.exe C:\Users\Admin\AppData\Local\Temp\316801558730488.js
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:772
    • C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /k copy "C:\Users\Admin\AppData\Local\Temp\316801558730488.js" "C:\Users\Admin\AppData\Local\Temp\\detectmintauspiciousleather.bat" && "C:\Users\Admin\AppData\Local\Temp\\detectmintauspiciousleather.bat"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:2984
      • C:\Windows\system32\findstr.exe
        findstr /V wholesaleshockrailmurder ""C:\Users\Admin\AppData\Local\Temp\\detectmintauspiciousleather.bat""
        3⤵
          PID:3924
        • C:\Windows\system32\certutil.exe
          certutil -f -decode flavorknottystimulatingobeisant motionlessroofeducationgroup.dll
          3⤵
            PID:3728
          • C:\Windows\system32\regsvr32.exe
            regsvr32 motionlessroofeducationgroup.dll
            3⤵
            • Loads dropped DLL
            PID:432

      Network

            MITRE ATT&CK Enterprise v15

            Replay Monitor

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            Downloads

            detectmintauspiciousleather.bat

            • Path C:\Users\Admin\AppData\Local\Temp\detectmintauspiciousleather.bat
            • Size 1.3MB
            • SHA256 e896bbf849048589fe0b467dfef4e2803e46bcec51f6b91a5c402452653e581c
            • MD5 SHA1 SHA512 SSDEEP

            detectmintauspiciousleather.bat

            • Path C:\Users\Admin\AppData\Local\Temp\detectmintauspiciousleather.bat
            • Size 1.3MB
            • SHA256 e896bbf849048589fe0b467dfef4e2803e46bcec51f6b91a5c402452653e581c
            • MD5 SHA1 SHA512 SSDEEP

            flavorknottystimulatingobeisant

            • Path C:\Users\Admin\AppData\Local\Temp\flavorknottystimulatingobeisant
            • Size 1.2MB
            • SHA256 6a0a8079c011cb8ceca4ebe9373a569cfd8fc2b504a2c7357a477f489e3f3548
            • MD5 SHA1 SHA512 SSDEEP

            motionlessroofeducationgroup.dll

            • Path C:\Users\Admin\AppData\Local\Temp\motionlessroofeducationgroup.dll
            • Size 937KB
            • SHA256 10069561921b8fa154124a034ab6efabc4db1433a68bacfef9bc6b7f41251877
            • MD5 SHA1 SHA512 SSDEEP

            motionlessroofeducationgroup.dll

            • Path C:\Users\Admin\AppData\Local\Temp\motionlessroofeducationgroup.dll
            • Size 937KB
            • SHA256 10069561921b8fa154124a034ab6efabc4db1433a68bacfef9bc6b7f41251877
            • MD5 SHA1 SHA512 SSDEEP

            memory/432-845-0x0000000003890000-0x00000000038B1000-memory.dmp

            memory/432-846-0x000000006D7C0000-0x000000006D8B1000-memory.dmp