Analysis

  • max time kernel
    137s
  • max time network
    146s
  • 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, 21:03

General

  • Target

    2024-01-23_dbd86559f81ca4467bda44a8eef801c8_cryptolocker.exe

  • Size

    60KB

  • MD5

    dbd86559f81ca4467bda44a8eef801c8

  • SHA1

    cc6494c2d15eb684d1008aae878bf36e50d92993

  • SHA256

    2c8c2f531c188bf3e1f0a42a3628d22a044999e76a51e99e40a043ae1ffe2744

  • SHA512

    483de60b7ab6674e222e8857ded7e9a6eb7b71df00b0fe4aa4ebdb4de7390ed552960ba76d8bfd0dc75afd9c237cec60a703e6813ed31e8e4f7c63f2be007c56

  • SSDEEP

    1536:Tj+jsMQMOtEvwDpj5HmpJpOUHECgNMo0vp2EMm:TCjsIOtEvwDpj5HE/OUHnSM1

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 4 IoCs
  • Detection of Cryptolocker Samples 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\2024-01-23_dbd86559f81ca4467bda44a8eef801c8_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-01-23_dbd86559f81ca4467bda44a8eef801c8_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4788
    • 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:220

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    60KB

    MD5

    00072a8ad65b08b9354ccb4384500023

    SHA1

    0d86778ffab0bd3e690d2ee76cf57516ed11c36a

    SHA256

    1046907ce9465d74be83ea0c17549dcd9e11deadc20f32b4d01740fd0a7e68e8

    SHA512

    96523642306600c55b1d2e573ea66cdce93201bd7dacc605350796cf81d7758a05d2772390f3940bec0265d584e2ebcb8d17c074c4094054151f8ddd9f42a38a

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/220-19-0x00000000005C0000-0x00000000005C6000-memory.dmp

    Filesize

    24KB

  • memory/220-22-0x00000000005A0000-0x00000000005A6000-memory.dmp

    Filesize

    24KB

  • memory/220-48-0x0000000000500000-0x000000000050E000-memory.dmp

    Filesize

    56KB

  • memory/4788-0-0x0000000000500000-0x000000000050E000-memory.dmp

    Filesize

    56KB

  • memory/4788-1-0x0000000000570000-0x0000000000576000-memory.dmp

    Filesize

    24KB

  • memory/4788-2-0x0000000000570000-0x0000000000576000-memory.dmp

    Filesize

    24KB

  • memory/4788-3-0x00000000020F0000-0x00000000020F6000-memory.dmp

    Filesize

    24KB

  • memory/4788-17-0x0000000000500000-0x000000000050E000-memory.dmp

    Filesize

    56KB