Analysis

  • max time kernel
    94s
  • max time network
    140s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    05/04/2024, 07:31

General

  • Target

    2024-04-05_52af4a3a2db1c5fd40af44744288a6d7_cryptolocker.exe

  • Size

    49KB

  • MD5

    52af4a3a2db1c5fd40af44744288a6d7

  • SHA1

    89e2c80c60deb8effc2fcae264716239c7f7fbb5

  • SHA256

    9e12c34b4cd8020ac6c12ca87880bbff99296370b07a3ba4053d1056b435180b

  • SHA512

    007dd54d6f325f4e3707584f1df3f236e8c1cb7303369e40318491ee72c37cc62648fb1b04630ba3a49430bd6c20d32288c2c3b8d2ccfe4c98b97f293f7e2c39

  • SSDEEP

    768:6Qz7yVEhs9+4OR7tOOtEvwDpjLHqPhqlcnvhx5/xFRHnx:6j+1NMOtEvwDpjr8hhX9x

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\2024-04-05_52af4a3a2db1c5fd40af44744288a6d7_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-04-05_52af4a3a2db1c5fd40af44744288a6d7_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:3168
    • 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:3172

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    49KB

    MD5

    6f43741eaf2a3841bb0c2453d494695a

    SHA1

    0811fe8a105520906542efc2082d6a36f1e66966

    SHA256

    cf7f40e811f573bcfc4690ff315f61d43ae47c3a34c63b0090591789aa206c11

    SHA512

    8080806c85cf68af486810c4c5b1aa0b0717ae33ff64d037aa26409fb422ce4acbe3bf29e704ae9c09f914aacb9df90ef91b75e84f988fb276af81f9c5708f23

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/3168-0-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB

  • memory/3168-1-0x0000000000730000-0x0000000000736000-memory.dmp

    Filesize

    24KB

  • memory/3168-2-0x0000000000730000-0x0000000000736000-memory.dmp

    Filesize

    24KB

  • memory/3168-3-0x0000000000750000-0x0000000000756000-memory.dmp

    Filesize

    24KB

  • memory/3168-17-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB

  • memory/3172-19-0x0000000000760000-0x0000000000766000-memory.dmp

    Filesize

    24KB

  • memory/3172-21-0x0000000000740000-0x0000000000746000-memory.dmp

    Filesize

    24KB

  • memory/3172-48-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB