Analysis

  • max time kernel
    94s
  • max time network
    125s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240426-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
  • submitted
    10/06/2024, 04:54

General

  • Target

    2024-06-10_b79f9506ec6fe2b02e6cc653fbe30e71_cryptolocker.exe

  • Size

    37KB

  • MD5

    b79f9506ec6fe2b02e6cc653fbe30e71

  • SHA1

    9e80473d7d5cd011846fb1796eec23c57ab9096f

  • SHA256

    2aaf618bbbeb43ee1d5ac2ed7850a72976dc1bae0671e075ef2776c486fad8bc

  • SHA512

    3e8dd2a4a856fc2be3185528885061ab68b8485ce8c849c2b7ce114b4d764ca4d70bd597e86c03a6612f41355acf716df8cbfe7d01108a5140a2967887cd561b

  • SSDEEP

    768:fTz7y3lhsT+hs1SQtOOtEvwDpjfAu9+4C:fT+hsMQMOtEvwDpjoIHC

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\2024-06-10_b79f9506ec6fe2b02e6cc653fbe30e71_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-06-10_b79f9506ec6fe2b02e6cc653fbe30e71_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4864
    • 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:1272

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

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

          Filesize

          37KB

          MD5

          7ecb7f524fb441004715110738655443

          SHA1

          a00e1ddfa9d8f4588a8f3d93977b552866c4e568

          SHA256

          413dc014385cee33c87a4beb02a461dc1c229c741ff780c1c8eb5077bc19d017

          SHA512

          d5d36c22c57ed0c77f7979f77acb6c4c176e5c49760e268d2aa9cd2e5a3a5cde9471b3febdd28b1df33e4d4b8316a9f4e13f702556fa64e4070714f552748f78

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

          Filesize

          315B

          MD5

          a34ac19f4afae63adc5d2f7bc970c07f

          SHA1

          a82190fc530c265aa40a045c21770d967f4767b8

          SHA256

          d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

          SHA512

          42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

        • memory/4864-0-0x00000000004D0000-0x00000000004D6000-memory.dmp

          Filesize

          24KB

        • memory/4864-1-0x00000000004F0000-0x00000000004F6000-memory.dmp

          Filesize

          24KB

        • memory/4864-8-0x00000000004D0000-0x00000000004D6000-memory.dmp

          Filesize

          24KB