Analysis

  • max time kernel
    142s
  • max time network
    153s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231222-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system
  • submitted
    18-01-2024 22:31

General

  • Target

    2024-01-18_216885ab059fe103149353ac18530f43_cryptolocker.exe

  • Size

    45KB

  • MD5

    216885ab059fe103149353ac18530f43

  • SHA1

    7faa0cbacccb2fb8223b2dbef985377e7db631b5

  • SHA256

    d13501643a22b320f4f9b75b02f251dcc8a7e257e95cd887502f05f295e495bb

  • SHA512

    77f60dcd05ce33bda79e54c736503c76509b642602ba35c20a2b5b9a157763ae5176e49a5ce2173eb6a6f2ed468e42950101dba6d3e775c946adc4edd4a0a76e

  • SSDEEP

    768:xQz7yVEhs9+4uR1bytOOtEvwDpjWE6BLbjG9Rzhwa7l:xj+VGMOtEvwDpjy+Tx

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 4 IoCs
  • Detection of Cryptolocker Samples 4 IoCs
  • Detects executables built or packed with MPress PE compressor 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
  • 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\2024-01-18_216885ab059fe103149353ac18530f43_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-01-18_216885ab059fe103149353ac18530f43_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:5040
    • 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:364

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    45KB

    MD5

    2e210f4d8db1c98edf0ccdebbd740722

    SHA1

    68cc0463a116d4adbc00be831c390cf35a521993

    SHA256

    0513848a47a49418fd4a54545d28ed63262cf1c6adaa39cf05f47fe97540d27a

    SHA512

    66823bade5382c3da1ed700e6aaf56381b2c7ab58652be8a3f999eeb3ba01ea5f92aa6a7b76bfcfd63c19f19dd8971cdf8c605357e4329a82e642f4bc001bcc6

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/364-19-0x00000000005E0000-0x00000000005E6000-memory.dmp

    Filesize

    24KB

  • memory/364-22-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/364-48-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/5040-0-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/5040-2-0x0000000002050000-0x0000000002056000-memory.dmp

    Filesize

    24KB

  • memory/5040-1-0x0000000002050000-0x0000000002056000-memory.dmp

    Filesize

    24KB

  • memory/5040-3-0x0000000002070000-0x0000000002076000-memory.dmp

    Filesize

    24KB

  • memory/5040-17-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB