Analysis

  • max time kernel
    144s
  • max time network
    146s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231222-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system
  • submitted
    11-02-2024 20:29

General

  • Target

    2024-02-11_42e65f3b467f455eea8d170fd7e6f126_cryptolocker.exe

  • Size

    48KB

  • MD5

    42e65f3b467f455eea8d170fd7e6f126

  • SHA1

    aa7d9b045b2f67442055d8bd990e3293a16a5161

  • SHA256

    dad115518b6bc8751e5ae275176e6ac2496b3c719980593fea7bb4b7b4247ce7

  • SHA512

    e87a17109121c4b539298f2d4849263ba0d5fd7a6968742091643be0ce29096f7a33af8c323d0fa2b4b39f3d3c121f96e48b7816c2485114527c88a66890ca78

  • SSDEEP

    768:6Qz7yVEhs9+4OR7tOOtEvwDpjLHqPhqlcnvgpnuQ3SzjL:6j+1NMOtEvwDpjr8hgpuQ3+

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 8 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-02-11_42e65f3b467f455eea8d170fd7e6f126_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-02-11_42e65f3b467f455eea8d170fd7e6f126_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:428
    • 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:4092

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    48KB

    MD5

    78131e6adf45e9f3865ff07c03a4ac08

    SHA1

    f0fdb7c54719e9dbfa136607f98646e9afae50c0

    SHA256

    0d9b47b4e77b59f15da5bd4b093764f646b4024bd560a398bfcf7562262bebce

    SHA512

    4b9aa077235dc9fe30642607fbf56b943fef1b8724e0ed59c656c16c57cb554a4598164c2ec608c7448da9433c4d163d43954a09f0901b7a17492ad2e0f5ee75

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/428-0-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB

  • memory/428-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/428-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/428-3-0x0000000000660000-0x0000000000666000-memory.dmp

    Filesize

    24KB

  • memory/428-18-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB

  • memory/4092-17-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB

  • memory/4092-21-0x00000000005F0000-0x00000000005F6000-memory.dmp

    Filesize

    24KB

  • memory/4092-20-0x00000000005D0000-0x00000000005D6000-memory.dmp

    Filesize

    24KB

  • memory/4092-49-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB