Analysis

  • max time kernel
    88s
  • max time network
    125s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    24-01-2024 00:48

General

  • Target

    2024-01-24_d90e186679da316c3bb7136696bee34d_cryptolocker.exe

  • Size

    122KB

  • MD5

    d90e186679da316c3bb7136696bee34d

  • SHA1

    4c01e17d0673ddca3cbfd5cb21c1512d524dbcfe

  • SHA256

    d58a0bebbca2ce37c484956f23ddf7bef6fbf0c7ac42c444530b0a110f21cb09

  • SHA512

    e8aee25344de5d781a28f67c7ad694b48022511624db30d6169327f7449be438457f16abe40ff689499532733baa8102784e2ecc3c33fcea02cad536bcf7830d

  • SSDEEP

    1536:gUj+AIMOtEvwDpjNbwQEIPlemUhYwkkxE4Q:vCA9OtEvwDpj1

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 1 IoCs
  • Detection of Cryptolocker Samples 1 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\2024-01-24_d90e186679da316c3bb7136696bee34d_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-01-24_d90e186679da316c3bb7136696bee34d_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4048
    • 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:3676

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    123KB

    MD5

    52452432ee1b9ac32002bb3d30a5f28f

    SHA1

    17b5ae2b847f69a4f126049c14687a1c28228419

    SHA256

    97a7bd4d2b37e7a72a59282ed61a863426037fd5b46435036e6e397e17698ffc

    SHA512

    05e4a900961098b4496d46eb635ed7ec9574b9ed761c484f3822a0c0e1ef5f7f038228f6a9bdd26613e1790bdb395e5897f30a186adefe6602e32eeaddd8bc66

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/3676-17-0x00000000006B0000-0x00000000006B6000-memory.dmp

    Filesize

    24KB

  • memory/3676-18-0x0000000002100000-0x0000000002106000-memory.dmp

    Filesize

    24KB

  • memory/4048-1-0x0000000000560000-0x0000000000566000-memory.dmp

    Filesize

    24KB

  • memory/4048-2-0x0000000000680000-0x0000000000686000-memory.dmp

    Filesize

    24KB

  • memory/4048-0-0x0000000000560000-0x0000000000566000-memory.dmp

    Filesize

    24KB