Analysis

  • max time kernel
    148s
  • max time network
    149s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    23-05-2024 01:22

General

  • Target

    2024-05-23_240332263e3a7c8f4a3057bd3a5fb9aa_cryptolocker.exe

  • Size

    96KB

  • MD5

    240332263e3a7c8f4a3057bd3a5fb9aa

  • SHA1

    6e24e48929e3c45b9aa9c211e70b4ba7424ca17d

  • SHA256

    9753932ae0403472f5e175eb38d560c61cf73ae3af55c3ec8ddcd5b3eec331ae

  • SHA512

    a10b2434c7eb498d8748b6e5771a1b86a96be41012d2bec1f445c8cc54f7f3d1400cfac612b6c5bcbb00b7d998b238a0e0b81f23b33febd1c7f8cd83a5fa2eba

  • SSDEEP

    768:xQz7yVEhs9+4uR1bytOOtEvwDpjWfbZ7uyA36S7MpxRXrZSUfFKazNclMjNUvAcT:xj+VGMOtEvwDpjubwQEI8UtzNcO8AcT

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 5 IoCs
  • Detection of Cryptolocker Samples 5 IoCs
  • Detects executables built or packed with MPress PE compressor 5 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 5 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-05-23_240332263e3a7c8f4a3057bd3a5fb9aa_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-23_240332263e3a7c8f4a3057bd3a5fb9aa_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:1520
    • 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:2644

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    96KB

    MD5

    8d722de688b20d43668fbaa9991f7c38

    SHA1

    f0dde3401c4fb999be1bc51a153cff913e232a2f

    SHA256

    e0f8a340ddd1ea71c730856da0fb11dbdff4c20ab2e6adba6b4a37046eb68d5c

    SHA512

    67ce08316552cdf0ed9cf706d0ebf98f7610f51eb389fc996ad186ed08389359bea4bb826ad6b95697ba35be3c307374fc120662866a49ae3242ebcb78fb1f1b

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/1520-0-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/1520-9-0x00000000020E0000-0x00000000020E6000-memory.dmp

    Filesize

    24KB

  • memory/1520-2-0x0000000002100000-0x0000000002106000-memory.dmp

    Filesize

    24KB

  • memory/1520-1-0x00000000020E0000-0x00000000020E6000-memory.dmp

    Filesize

    24KB

  • memory/1520-16-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/2644-18-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/2644-20-0x0000000002110000-0x0000000002116000-memory.dmp

    Filesize

    24KB

  • memory/2644-48-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB