Analysis

  • max time kernel
    135s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    14/02/2024, 17:51

General

  • Target

    2024-02-14_fc2bf02250cdf2c00c61d83a8f570e42_cryptolocker.exe

  • Size

    57KB

  • MD5

    fc2bf02250cdf2c00c61d83a8f570e42

  • SHA1

    26cbe43bfa284fdd974540e50485bb922750b5bc

  • SHA256

    03f949818d3c49a3f63f820e93bacb54e11af32781c48b06d381e49cbd0149ad

  • SHA512

    85992589ffc5531c9266f141465782b059aa4e7cb8f03fa055bf74f28d400a62f2bf97d27c8f8ac173281dfeb6113e1da74cf14e2255ebdcddc8eb323be0ca9a

  • SSDEEP

    768:xQz7yVEhs9+4uR1bytOOtEvwDpjWfbZgBh8i6g7Goi20PbF:xj+VGMOtEvwDpjubEgV20DF

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 4 IoCs
  • Detection of Cryptolocker Samples 4 IoCs
  • Detects executables built or packed with MPress PE compressor 4 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\2024-02-14_fc2bf02250cdf2c00c61d83a8f570e42_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-02-14_fc2bf02250cdf2c00c61d83a8f570e42_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:3980
    • 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:5104

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

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

          Filesize

          57KB

          MD5

          d020ef882d3077dc785c34dd65198ae1

          SHA1

          cc71617a71f476cb3c8b9325918bb143f7bb9d30

          SHA256

          caecd21f6999d9fc8f8ec44f7cde65f62220c85d63310290dee164dfcef6f8f1

          SHA512

          4fc39434b90095f9d6ac19da2cd008e115a65e8993ec09bfe13ad04f3e18f7e8faed6eb43e95ffdd1b7a479c26483c2ec90d294b84c51887ffd0b20c0a15d218

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

          Filesize

          315B

          MD5

          a34ac19f4afae63adc5d2f7bc970c07f

          SHA1

          a82190fc530c265aa40a045c21770d967f4767b8

          SHA256

          d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

          SHA512

          42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

        • memory/3980-0-0x0000000000500000-0x0000000000510000-memory.dmp

          Filesize

          64KB

        • memory/3980-1-0x00000000005A0000-0x00000000005A6000-memory.dmp

          Filesize

          24KB

        • memory/3980-2-0x00000000005A0000-0x00000000005A6000-memory.dmp

          Filesize

          24KB

        • memory/3980-3-0x00000000005D0000-0x00000000005D6000-memory.dmp

          Filesize

          24KB

        • memory/3980-24-0x0000000000500000-0x0000000000510000-memory.dmp

          Filesize

          64KB

        • memory/5104-18-0x00000000007D0000-0x00000000007D6000-memory.dmp

          Filesize

          24KB

        • memory/5104-25-0x00000000007B0000-0x00000000007B6000-memory.dmp

          Filesize

          24KB

        • memory/5104-48-0x0000000000500000-0x0000000000510000-memory.dmp

          Filesize

          64KB