Analysis

  • max time kernel
    133s
  • max time network
    123s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240419-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system
  • submitted
    04/05/2024, 10:43

General

  • Target

    2024-05-04_fe5a96975b4bb15cb6dc5d633016f0b7_cryptolocker.exe

  • Size

    72KB

  • MD5

    fe5a96975b4bb15cb6dc5d633016f0b7

  • SHA1

    44206cd669a5249851c6f9a35c84d1cfede3ecd2

  • SHA256

    d0225df84153d4eff257b9ee4827a61d5a5bae159a32cc98c57dc18dcfd57975

  • SHA512

    22f7aacf0d246c72a5bbbfe41e1ba922d5d96743067f809d18d8e9d2244d6075ffe1e88bfcd418f6ec2eff00a31061a53c41f958635246ccf4dcee399ba7d801

  • SSDEEP

    1536:nj+4zs2cPVhlMOtEvwDpj4H8u8rZVTs93:C4Q2c94OtEvwDpj4H8zy

Score
9/10
upx

Malware Config

Signatures

  • Detection of CryptoLocker Variants 4 IoCs
  • Detection of Cryptolocker Samples 2 IoCs
  • UPX dump on OEP (original entry point) 4 IoCs
  • Checks computer location settings 2 TTPs 2 IoCs

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

  • Executes dropped EXE 1 IoCs
  • UPX packed file 4 IoCs

    Detects executables packed with UPX/modified UPX open source packer.

  • Enumerates physical storage devices 1 TTPs

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

  • Modifies system certificate store 2 TTPs 8 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-05-04_fe5a96975b4bb15cb6dc5d633016f0b7_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-04_fe5a96975b4bb15cb6dc5d633016f0b7_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:3464
    • C:\Users\Admin\AppData\Local\Temp\misid.exe
      "C:\Users\Admin\AppData\Local\Temp\misid.exe"
      2⤵
      • Checks computer location settings
      • Executes dropped EXE
      • Modifies system certificate store
      PID:2992

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\misid.exe

    Filesize

    72KB

    MD5

    3d23866e60c3e7ca9be0f653294eaeab

    SHA1

    e2bcd1fc2988314f8d2329a059a1f55f619b9db0

    SHA256

    9ff23df876868be5d649d6a94105cd90650a12ef18b25348eedf9be47c5a12e9

    SHA512

    6e9601d6d1f006ab2b92ecaf3d2646cd53209b8a1ed1761622fb2273aecf8ef8c49178db7b078870e57ca4aedf8e314cc0bcd7e061d80082f12b08ec86cb1388

  • C:\Users\Admin\AppData\Local\Temp\misids.exe

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/2992-20-0x0000000000750000-0x0000000000756000-memory.dmp

    Filesize

    24KB

  • memory/2992-26-0x0000000000660000-0x0000000000666000-memory.dmp

    Filesize

    24KB

  • memory/2992-50-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/3464-0-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/3464-1-0x00000000005C0000-0x00000000005C6000-memory.dmp

    Filesize

    24KB

  • memory/3464-2-0x00000000005E0000-0x00000000005E6000-memory.dmp

    Filesize

    24KB

  • memory/3464-9-0x00000000005C0000-0x00000000005C6000-memory.dmp

    Filesize

    24KB

  • memory/3464-18-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB