Analysis

  • max time kernel
    137s
  • max time network
    142s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    11/02/2024, 13:32

General

  • Target

    2024-02-11_61345b625946c7aaa0915d98ce98d479_cryptolocker.exe

  • Size

    123KB

  • MD5

    61345b625946c7aaa0915d98ce98d479

  • SHA1

    9ee8fef8a5428d9c2523e19e849fd1256efdb43f

  • SHA256

    b52fdb4b4e73e0eca1fc5d4e8863102528f961717d4d1ef42bf9df99eca014fb

  • SHA512

    83b6cfd3cad3790e68f4d05c8c49c431d9b0b33bbf48e569c68c21923a0b0210353b53d823f3c36fb3efa5edf86e8faaa6d73652d96d6500006e20e5e4fca699

  • SSDEEP

    1536:gUj+AIMOtEvwDpjNbwQEIPlemUhYwkkxE4qe:vCA9OtEvwDpjA

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 1 IoCs
  • Detection of Cryptolocker Samples 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 8 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-02-11_61345b625946c7aaa0915d98ce98d479_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-02-11_61345b625946c7aaa0915d98ce98d479_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:2244
    • 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:3484

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

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

    Filesize

    123KB

    MD5

    70f237b9e0851c7289f989ecaf4af86a

    SHA1

    fe71aa6a64d78e37ce909e69dda622d2c554a503

    SHA256

    abb842ae5b056004ad09840e642d1d0ce87e77c7336087a16533082d8482ecc4

    SHA512

    f627354a4b95fc08ab0ec3372bbb2dd298cf858fab91a923b8090672d3280a798e5fd9e1b73ecf559df26bf2cd87d560ed9a8aeeb3b4c25fc91335c39f1b42d2

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/2244-0-0x0000000002310000-0x0000000002316000-memory.dmp

    Filesize

    24KB

  • memory/2244-1-0x0000000002310000-0x0000000002316000-memory.dmp

    Filesize

    24KB

  • memory/2244-2-0x00000000021A0000-0x00000000021A6000-memory.dmp

    Filesize

    24KB

  • memory/3484-17-0x00000000007D0000-0x00000000007D6000-memory.dmp

    Filesize

    24KB

  • memory/3484-18-0x0000000000660000-0x0000000000666000-memory.dmp

    Filesize

    24KB