Analysis

  • max time kernel
    148s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240802-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
  • submitted
    05-09-2024 12:34

General

  • Target

    2024-09-05_a3b461521ca3dc46dff2ff6d13da2c56_cryptolocker.exe

  • Size

    72KB

  • MD5

    a3b461521ca3dc46dff2ff6d13da2c56

  • SHA1

    8d9dc94cbcb89714f6aba406b2e08d5196e3db85

  • SHA256

    2c7a3f60c039ebdc28ef6247b91fbc78b01f47dec00e3a9c6c04f1c5bd2ad272

  • SHA512

    c7a5cda651e743e33928eb17c1f09523eaa55be7e30a97c3081f44a1d092af0ffbd3b1670a11733eb1ff0c4d18b9fcb2981f8bac77ca4252a75395fde68b190a

  • SSDEEP

    1536:nj+4zs2cPVhlMOtEvwDpj4H8u8rZVTs91:C4Q2c94OtEvwDpj4H8z8

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
  • UPX packed file 4 IoCs

    Detects executables packed with UPX/modified UPX open source packer.

  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • System Location Discovery: System Language Discovery 1 TTPs 2 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Modifies system certificate store 2 TTPs 8 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-09-05_a3b461521ca3dc46dff2ff6d13da2c56_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-09-05_a3b461521ca3dc46dff2ff6d13da2c56_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2652
    • C:\Users\Admin\AppData\Local\Temp\misid.exe
      "C:\Users\Admin\AppData\Local\Temp\misid.exe"
      2⤵
      • Checks computer location settings
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      • Modifies system certificate store
      PID:3004

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    73KB

    MD5

    d7fe6af0958572aaa9ce1b908e5d6da1

    SHA1

    fa7816d42933d36e45fed1770713f6e932b7132c

    SHA256

    d425a87b12186415f8a66bb652842b7a15e941c3870b51e106c05234e828fa9b

    SHA512

    fff63fc84c19ec85c6a680608da0ad43037141a530782276dc9e787478e31fd1f249e30024d433e88995bc41eb3230b351f085f092ae230c5d4a52b8ebef499b

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/2652-0-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/2652-1-0x00000000020D0000-0x00000000020D6000-memory.dmp

    Filesize

    24KB

  • memory/2652-2-0x00000000020D0000-0x00000000020D6000-memory.dmp

    Filesize

    24KB

  • memory/2652-3-0x00000000020F0000-0x00000000020F6000-memory.dmp

    Filesize

    24KB

  • memory/2652-18-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/3004-20-0x00000000006A0000-0x00000000006A6000-memory.dmp

    Filesize

    24KB

  • memory/3004-21-0x0000000002060000-0x0000000002066000-memory.dmp

    Filesize

    24KB

  • memory/3004-49-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB