Analysis

  • max time kernel
    102s
  • max time network
    126s
  • 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, 03:45

General

  • Target

    2024-01-24_85e1cc28b1d4c37a8c2dae935a6865d0_cryptolocker.exe

  • Size

    47KB

  • MD5

    85e1cc28b1d4c37a8c2dae935a6865d0

  • SHA1

    7ac2023e73659d261a3ab1b02751a3ec416fe419

  • SHA256

    b6aadb78b27b1c45063bf4c3f4c1655da076478891963cd0187ef3b1e0aef589

  • SHA512

    3cc9c7dd3403550a95bc89dea699d9484d3e8e679e4dfee02f5f9a079d8aa053f5518c25a4f0f2ec029c58c26a0ce45b05685a70a7beacccbb245a67ef96602d

  • SSDEEP

    768:xQz7yVEhs9+4uR1bytOOtEvwDpjWE6BLbjG9Rzhwax:xj+VGMOtEvwDpjy+Tx

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\2024-01-24_85e1cc28b1d4c37a8c2dae935a6865d0_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-01-24_85e1cc28b1d4c37a8c2dae935a6865d0_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:2888
    • 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:3896

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

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

          Filesize

          47KB

          MD5

          706c48e469922ca35bdd3ca43027fa78

          SHA1

          b1e4f18f334fcc3532daabc849c64691744d652e

          SHA256

          b3e4bc460ed15b642eec2d4b491a5e17ab84e2d5a1f212ece0fc9e8196aac468

          SHA512

          b1aa959c5e261a1ad2391492c3a146b9cd3a576a4d62b1d6fd1c0f68971c243e9f7cabe891e787c0137337c8e078072c1f41d5b904f836638298a3dfd98a1aee

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

          Filesize

          315B

          MD5

          a34ac19f4afae63adc5d2f7bc970c07f

          SHA1

          a82190fc530c265aa40a045c21770d967f4767b8

          SHA256

          d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

          SHA512

          42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

        • memory/2888-0-0x0000000000500000-0x0000000000510000-memory.dmp

          Filesize

          64KB

        • memory/2888-1-0x00000000005B0000-0x00000000005B6000-memory.dmp

          Filesize

          24KB

        • memory/2888-2-0x00000000005B0000-0x00000000005B6000-memory.dmp

          Filesize

          24KB

        • memory/2888-3-0x00000000005D0000-0x00000000005D6000-memory.dmp

          Filesize

          24KB

        • memory/2888-17-0x0000000000500000-0x0000000000510000-memory.dmp

          Filesize

          64KB

        • memory/3896-18-0x0000000000500000-0x0000000000510000-memory.dmp

          Filesize

          64KB

        • memory/3896-22-0x00000000006B0000-0x00000000006B6000-memory.dmp

          Filesize

          24KB

        • memory/3896-20-0x00000000006D0000-0x00000000006D6000-memory.dmp

          Filesize

          24KB

        • memory/3896-49-0x0000000000500000-0x0000000000510000-memory.dmp

          Filesize

          64KB