Analysis

  • max time kernel
    55s
  • max time network
    51s
  • platform
    windows7_x64
  • resource
    win7-20220901-en
  • resource tags

    arch:x64arch:x86image:win7-20220901-enlocale:en-usos:windows7-x64system
  • submitted
    15/01/2023, 14:33

General

  • Target
    0b58bcd32bc93b428e389f8976665749.exe
  • Size 5.7MB
  • Sample230115-rwvxjsfh97
  • SHA256 804826c7da65f0ef6aba984fc65cd2e701f4d26ef52fedd3dcea5808c4c70542
  • MD5 SHA1 SHA512 SSDEEP
Score
8/10

Malware Config

Signatures

  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 2 IoCs
  • Modifies file permissions 1 TTPs 3 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Creates scheduled task(s) 1 TTPs 1 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Suspicious use of WriteProcessMemory 15 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\0b58bcd32bc93b428e389f8976665749.exe
    "C:\Users\Admin\AppData\Local\Temp\0b58bcd32bc93b428e389f8976665749.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1252
    • C:\Windows\System32\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /CREATE /TN "Windows\IntelComputingTooIklt\IntelPaint3.8.7.2." /TR "C:\ProgramData\MsiBoostSasum\WindowsPaint-Ver3.8.7.2.exe" /SC MINUTE
      2⤵
      • Creates scheduled task(s)
      PID:1036
    • C:\Windows\System32\icacls.exe
      "C:\Windows\System32\icacls.exe" "C:\ProgramData\MsiBoostSasum" /inheritance:e /deny "*S-1-1-0:(R,REA,RA,RD)"
      2⤵
      • Modifies file permissions
      PID:1528
    • C:\Windows\System32\icacls.exe
      "C:\Windows\System32\icacls.exe" "C:\ProgramData\MsiBoostSasum" /inheritance:e /deny "*S-1-5-7:(R,REA,RA,RD)"
      2⤵
      • Modifies file permissions
      PID:596
    • C:\Windows\System32\icacls.exe
      "C:\Windows\System32\icacls.exe" "C:\ProgramData\MsiBoostSasum" /inheritance:e /deny "admin:(R,REA,RA,RD)"
      2⤵
      • Modifies file permissions
      PID:532
  • C:\Windows\system32\taskeng.exe
    taskeng.exe {A2E7C844-B589-43EE-9420-D1CFC30B60C9} S-1-5-21-4063495947-34355257-727531523-1000:RYNKSFQE\Admin:Interactive:[1]
    1⤵
    • Loads dropped DLL
    • Suspicious use of WriteProcessMemory
    PID:1224
    • C:\ProgramData\MsiBoostSasum\WindowsPaint-Ver3.8.7.2.exe
      C:\ProgramData\MsiBoostSasum\WindowsPaint-Ver3.8.7.2.exe
      2⤵
      • Executes dropped EXE
      PID:1300

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

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        Downloads

        WindowsPaint-Ver3.8.7.2.exe

        • Path C:\ProgramData\MsiBoostSasum\WindowsPaint-Ver3.8.7.2.exe
        • Size 596.3MB
        • SHA256 72b84c2df4988c38ce4b90dfe6c52e245756ff90b02e45a3213b62d4fce96dde
        • MD5 SHA1 SHA512 SSDEEP

        WindowsPaint-Ver3.8.7.2.exe

        • Path C:\ProgramData\MsiBoostSasum\WindowsPaint-Ver3.8.7.2.exe
        • Size 366.4MB
        • SHA256 b58a814bfca573ad5843cc9f7441d801b0849c21eff88b29213767ffe773ca91
        • MD5 SHA1 SHA512 SSDEEP

        WindowsPaint-Ver3.8.7.2.exe

        • Path \ProgramData\MsiBoostSasum\WindowsPaint-Ver3.8.7.2.exe
        • Size 407.4MB
        • SHA256 e103dbba27de73084c540bd0325353d7a73df16972dd35c5517e294d8a4c9ae9
        • MD5 SHA1 SHA512 SSDEEP

        WindowsPaint-Ver3.8.7.2.exe

        • Path \ProgramData\MsiBoostSasum\WindowsPaint-Ver3.8.7.2.exe
        • Size 417.6MB
        • SHA256 6deee387c4176037c66373bf4a66ee98376f650231be694b596a8e04d7658b92
        • MD5 SHA1 SHA512 SSDEEP

        memory/1252-54-0x000000013F030000-0x000000013F933000-memory.dmp

        memory/1252-57-0x000007FEFB741000-0x000007FEFB743000-memory.dmp

        memory/1300-67-0x000000013F310000-0x000000013FC13000-memory.dmp