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Analysis

  • max time kernel
    135s
  • max time network
    146s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231023-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231023-enlocale:en-usos:windows10-2004-x64system
  • submitted
    23/10/2023, 19:53

General

  • Target

    NEAS.2023-09-06_dca794bf234757ae9149c821ab42e65a_cryptolocker_JC.exe

  • Size

    60KB

  • MD5

    dca794bf234757ae9149c821ab42e65a

  • SHA1

    e28550c0cecf67a9b5eac8e1997854b8526b867a

  • SHA256

    1e1463a796820afc6f903142cb52472e732ec680a4394abe5b92e078cf330859

  • SHA512

    550093c39b759ae3efa96d5022e0d8ede8f28f80fa393cc66468f7122ac32e5b953a61d8cf3593bd2c001d4f90aa8a844fa1a0a2f379af0e2dc12f8b581237e1

  • SSDEEP

    768:6Qz7yVEhs9+4OR7tOOtEvwDpjLHqPOYRmNxt5I52kGElUAx:6j+1NMOtEvwDpjr8ox8UDElbx

Score
7/10

Malware Config

Signatures

  • 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\NEAS.2023-09-06_dca794bf234757ae9149c821ab42e65a_cryptolocker_JC.exe
    "C:\Users\Admin\AppData\Local\Temp\NEAS.2023-09-06_dca794bf234757ae9149c821ab42e65a_cryptolocker_JC.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4948
    • 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:1536

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    60KB

    MD5

    2163fd7e1c98285c0c4850504220ded7

    SHA1

    d4fc2f47d12f2307895368403913b4b50d7026bf

    SHA256

    618cb5ac4732ef008f961f8c47f34f0a934c9e33c536537986bdaa43247096fd

    SHA512

    0788c0ee3be1e4a39fab0432b0e44a3cb4501e9284a03621b7555593b605208d5c4e354b7df3379a8b8fe86a9d6deb5c363288754d50f529b51e2f087f07cfa5

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

    Filesize

    60KB

    MD5

    2163fd7e1c98285c0c4850504220ded7

    SHA1

    d4fc2f47d12f2307895368403913b4b50d7026bf

    SHA256

    618cb5ac4732ef008f961f8c47f34f0a934c9e33c536537986bdaa43247096fd

    SHA512

    0788c0ee3be1e4a39fab0432b0e44a3cb4501e9284a03621b7555593b605208d5c4e354b7df3379a8b8fe86a9d6deb5c363288754d50f529b51e2f087f07cfa5

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

    Filesize

    60KB

    MD5

    2163fd7e1c98285c0c4850504220ded7

    SHA1

    d4fc2f47d12f2307895368403913b4b50d7026bf

    SHA256

    618cb5ac4732ef008f961f8c47f34f0a934c9e33c536537986bdaa43247096fd

    SHA512

    0788c0ee3be1e4a39fab0432b0e44a3cb4501e9284a03621b7555593b605208d5c4e354b7df3379a8b8fe86a9d6deb5c363288754d50f529b51e2f087f07cfa5

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/1536-19-0x00000000005D0000-0x00000000005D6000-memory.dmp

    Filesize

    24KB

  • memory/1536-20-0x00000000005B0000-0x00000000005B6000-memory.dmp

    Filesize

    24KB

  • memory/1536-46-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB

  • memory/4948-0-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB

  • memory/4948-1-0x00000000004E0000-0x00000000004E6000-memory.dmp

    Filesize

    24KB

  • memory/4948-2-0x00000000004E0000-0x00000000004E6000-memory.dmp

    Filesize

    24KB

  • memory/4948-3-0x0000000000660000-0x0000000000666000-memory.dmp

    Filesize

    24KB

  • memory/4948-12-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB