Analysis

  • max time kernel
    149s
  • max time network
    154s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    19-03-2024 09:48

General

  • Target

    2024-03-19_8be055ef89f5cd57ca12e27d7d47508d_cryptolocker.exe

  • Size

    63KB

  • MD5

    8be055ef89f5cd57ca12e27d7d47508d

  • SHA1

    2a0670c8554856adeab184101e393e0165693bfa

  • SHA256

    dfc44d5643185c2aa5a2fd4b6ffc20bda3310a77f4e3c7709e24258fc4afe499

  • SHA512

    cbd8cff228c2b3164cf8ec347f77b297d720902540d8fb03d026843e472f2b83fc54cfd80cdb34984671137ae29b5504ca127f0e3190a60d41c80d01ca9d60be

  • SSDEEP

    768:6Qz7yVEhs9+4OR7tOOtEvwDpjLHqPOYRmNxt5I52kGEKIR8:6j+1NMOtEvwDpjr8ox8UDEKK8

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\2024-03-19_8be055ef89f5cd57ca12e27d7d47508d_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-03-19_8be055ef89f5cd57ca12e27d7d47508d_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4256
    • 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:1920

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    64KB

    MD5

    980a8a3032e4686ea56f7ebcc3c9601b

    SHA1

    1060d842183df47da4a387a79cff632884761369

    SHA256

    10a052a820eed23003baca48b9c3e3d0ef08e22579e0bff6b3379834ec4874dd

    SHA512

    8215e7c7287f043d18bb05803e20fc82e574a152c4048e0b4e2a580ecc072c78e570d06384f73732a00efbc72546bcee4f21b4e1a8d23679dd396c6a143383fa

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/1920-19-0x0000000001F70000-0x0000000001F76000-memory.dmp

    Filesize

    24KB

  • memory/1920-25-0x0000000001F50000-0x0000000001F56000-memory.dmp

    Filesize

    24KB

  • memory/1920-48-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB

  • memory/4256-0-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB

  • memory/4256-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/4256-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/4256-3-0x00000000004F0000-0x00000000004F6000-memory.dmp

    Filesize

    24KB

  • memory/4256-17-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB