Analysis

  • max time kernel
    196s
  • max time network
    209s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220812-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
  • submitted
    31/10/2022, 00:08

General

  • Target

    f8bfd08ef293bae9cd7165779355b486216e72bdeba860c0e5f4c014df3bed0b.exe

  • Size

    842KB

  • MD5

    a18fcf174aa25e18ec2d94b5b418c85e

  • SHA1

    c49846f245365554052b73d013f864c50bf32788

  • SHA256

    f8bfd08ef293bae9cd7165779355b486216e72bdeba860c0e5f4c014df3bed0b

  • SHA512

    5e92b26709397f8b8de66f0394dd521e1dba7e9f8d41ba23b659be3861628406a9a5dbffac86beea6bd49ab392acde2bba726bd4299f8c0d8d0a8631945d9898

  • SSDEEP

    6144:a+nglw9ayQv3ahvyn/PU7O0KXgTTSj9ltfgIg+oa+ZEN2ERBOzi0q5Lm17z6cA0:rjS3Yvyn/0TkLF+I0q5LvF0

Score
10/10

Malware Config

Signatures

  • Modifies WinLogon for persistence 2 TTPs 1 IoCs
  • Executes dropped EXE 1 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Adds Run key to start application 2 TTPs 4 IoCs
  • Drops file in System32 directory 3 IoCs
  • Drops file in Program Files directory 42 IoCs
  • Drops file in Windows directory 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of WriteProcessMemory 15 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\f8bfd08ef293bae9cd7165779355b486216e72bdeba860c0e5f4c014df3bed0b.exe
    "C:\Users\Admin\AppData\Local\Temp\f8bfd08ef293bae9cd7165779355b486216e72bdeba860c0e5f4c014df3bed0b.exe"
    1⤵
    • Modifies WinLogon for persistence
    • Checks computer location settings
    • Drops file in System32 directory
    • Drops file in Program Files directory
    • Drops file in Windows directory
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:1668
    • C:\Windows\SysWOW64\cmd.exe
      cmd /c reg ADD HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Run /v freizer /t REG_SZ /d C:\WINDOWS\system32\freizer.exe /f
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1448
      • C:\Windows\SysWOW64\reg.exe
        reg ADD HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Run /v freizer /t REG_SZ /d C:\WINDOWS\system32\freizer.exe /f
        3⤵
        • Adds Run key to start application
        PID:4240
    • C:\Windows\SysWOW64\cmd.exe
      cmd /c reg ADD HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Run /v svchost /t REG_SZ /d C:\WINDOWS\system32\svchost.exe /f
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1512
      • C:\Windows\SysWOW64\reg.exe
        reg ADD HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Run /v svchost /t REG_SZ /d C:\WINDOWS\system32\svchost.exe /f
        3⤵
        • Adds Run key to start application
        PID:4516
    • C:\windows\temp\41422.exe
      "C:\windows\temp\41422.exe"
      2⤵
      • Executes dropped EXE
      PID:4868

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • C:\Windows\Temp\41422.exe

    Filesize

    15KB

    MD5

    eb934876df98326f113edbc7c8bffef3

    SHA1

    f5cba9aec319c16276e7a79bd8827d1f132bf02f

    SHA256

    3bf1758a111fe6253b21d0f090a92e1c35c8f6a3277b843a38a5fcd486baafc3

    SHA512

    eb03c7fb8fac405d7d94adcf22da168386efb5eaedbcf5cdb54ef0390c0bac53894cc7d3d7543c91ef28a4192729391d72614f435a11be5619be1594eb959178

  • C:\windows\temp\41422.exe

    Filesize

    15KB

    MD5

    eb934876df98326f113edbc7c8bffef3

    SHA1

    f5cba9aec319c16276e7a79bd8827d1f132bf02f

    SHA256

    3bf1758a111fe6253b21d0f090a92e1c35c8f6a3277b843a38a5fcd486baafc3

    SHA512

    eb03c7fb8fac405d7d94adcf22da168386efb5eaedbcf5cdb54ef0390c0bac53894cc7d3d7543c91ef28a4192729391d72614f435a11be5619be1594eb959178

  • memory/4868-139-0x0000000073350000-0x0000000073901000-memory.dmp

    Filesize

    5.7MB