Analysis

  • max time kernel
    140s
  • max time network
    123s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240419-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system
  • submitted
    02/05/2024, 18:52

General

  • Target

    2024-05-02_5289ebf8fd5313de28cbb001119c7e27_cryptolocker.exe

  • Size

    70KB

  • MD5

    5289ebf8fd5313de28cbb001119c7e27

  • SHA1

    94b68b73b5316b840a97978765d3148050931d2c

  • SHA256

    a7af0535d8a9e645d67c6ee9beb2e25efbec04fbe4afcf235e62ac4dfd2c914f

  • SHA512

    efcb42f92f4e376a218dfcaa0296ce646fe8fb8cd33d8956f479a583efdc61da20d9e3383ebea3cfddc49b5a85b1aabbc48f907f910a05b5e6781bf553e981f3

  • SSDEEP

    1536:nj+4zs2cPVhlMOtEvwDpj4H8u8rZVTs9J:C4Q2c94OtEvwDpj4H8zA

Score
9/10
upx

Malware Config

Signatures

  • Detection of CryptoLocker Variants 5 IoCs
  • Detection of Cryptolocker Samples 3 IoCs
  • UPX dump on OEP (original entry point) 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
  • UPX packed file 5 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).

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

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-05-02_5289ebf8fd5313de28cbb001119c7e27_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-02_5289ebf8fd5313de28cbb001119c7e27_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:2952
    • 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:904

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

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

          Filesize

          70KB

          MD5

          0661ddf8680764a745a322d95c1f1dca

          SHA1

          dc98f65db533ab6ed8fe16e11ea68559a587742d

          SHA256

          2ed93607c9e6beea3df4bd2ac58dc48fc2a7cdba63d2d884719a3a3e39ccedc5

          SHA512

          84bf0c7065a07d23ac8d135d444d6e67b608695b3ee0307fbb278a17a3596760e910021824d143e6683c63fa9a8e51a18711557e6ce6f981edbf2885b493d23f

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

          Filesize

          315B

          MD5

          a34ac19f4afae63adc5d2f7bc970c07f

          SHA1

          a82190fc530c265aa40a045c21770d967f4767b8

          SHA256

          d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

          SHA512

          42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

        • memory/904-19-0x0000000000500000-0x0000000000510000-memory.dmp

          Filesize

          64KB

        • memory/904-50-0x0000000000500000-0x0000000000510000-memory.dmp

          Filesize

          64KB

        • memory/2952-0-0x0000000000500000-0x0000000000510000-memory.dmp

          Filesize

          64KB

        • memory/2952-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

          Filesize

          24KB

        • memory/2952-2-0x00000000004F0000-0x00000000004F6000-memory.dmp

          Filesize

          24KB

        • memory/2952-9-0x00000000004D0000-0x00000000004D6000-memory.dmp

          Filesize

          24KB

        • memory/2952-17-0x0000000000500000-0x0000000000510000-memory.dmp

          Filesize

          64KB