Analysis

  • max time kernel
    141s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    23-01-2024 16:28

General

  • Target

    2024-01-23_70f088a8b0700644065406b570b271be_cryptolocker.exe

  • Size

    51KB

  • MD5

    70f088a8b0700644065406b570b271be

  • SHA1

    6490caab8a1c6242ff234d0c3467527047a06247

  • SHA256

    3fdd5ac52891171ab406dc18613aee190e19b0c9af9b199b6eaa9f506bca1783

  • SHA512

    1e5d36890fe5f7effe4b4db297d74d78184ff9eae48441350cfda1d580dd7a79205500592097d16a7d0a55fa1ef87032a8674fdc1f0aeeda8f32f26a149c799d

  • SSDEEP

    1536:ZzFbxmLPWQMOtEvwDpj386Sj/WprgJN6tZdO5S:ZVxkGOtEvwDpjcw

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 1 IoCs
  • Checks computer location settings 2 TTPs 2 IoCs

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

  • Executes dropped EXE 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Modifies system certificate store 2 TTPs 6 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-01-23_70f088a8b0700644065406b570b271be_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-01-23_70f088a8b0700644065406b570b271be_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:3872
    • 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:4536

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    51KB

    MD5

    99396d90052df92d687aaaa4cdceca03

    SHA1

    c95dd6c2b37ddc4d2c81374da5445ff9dd4a5751

    SHA256

    19e9b65d5b91e2292191c1d405423d851785237b942485ce9e2057063dd6d84d

    SHA512

    c3640a33b6074e7271113eb429504a04f05c8f09a6a15a161a29027c19da1035eabe13767d82649764f90cf1e94be57945de7b25cfae268e832510b4e048f8c1

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/3872-0-0x0000000000620000-0x0000000000626000-memory.dmp

    Filesize

    24KB

  • memory/3872-1-0x0000000000620000-0x0000000000626000-memory.dmp

    Filesize

    24KB

  • memory/3872-2-0x0000000000750000-0x0000000000756000-memory.dmp

    Filesize

    24KB

  • memory/4536-16-0x0000000000620000-0x0000000000626000-memory.dmp

    Filesize

    24KB

  • memory/4536-19-0x00000000020F0000-0x00000000020F6000-memory.dmp

    Filesize

    24KB

  • memory/4536-18-0x0000000000570000-0x0000000000576000-memory.dmp

    Filesize

    24KB

  • memory/4536-47-0x0000000000620000-0x0000000000626000-memory.dmp

    Filesize

    24KB