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Analysis

  • max time kernel
    143s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    13/02/2024, 05:39

General

  • Target

    2024-02-13_9a72f6e605ddcf3d99cf6bd6ef8bf765_cryptolocker.exe

  • Size

    93KB

  • MD5

    9a72f6e605ddcf3d99cf6bd6ef8bf765

  • SHA1

    ffe4dc1f6e0717e8f3e230af8a108a440b6e4052

  • SHA256

    db0b69b204aedf4e54513056ac1f1786785c1f306e94da5f9900e65f51658d7a

  • SHA512

    f00baf77686176293bd074672bb118cf5c6d475eb5f3d6ec9810d7cfec3794d25b3646be9d1f1950fb8ee097e70eec722b60d98bbd73da394d6524c5941d2ab5

  • SSDEEP

    1536:zj+soPSMOtEvwDpj4ktBl01hJl8QAPM8Ho6cRDjgx/Tg:zCsanOtEvwDpjB8

Score
9/10
upx

Malware Config

Signatures

  • Detection of CryptoLocker Variants 4 IoCs
  • Detection of Cryptolocker Samples 4 IoCs
  • UPX dump on OEP (original entry point) 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
  • 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).

  • Modifies system certificate store 2 TTPs 10 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-02-13_9a72f6e605ddcf3d99cf6bd6ef8bf765_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-02-13_9a72f6e605ddcf3d99cf6bd6ef8bf765_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:1548
    • 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:544

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    93KB

    MD5

    1a85c48444cf465d3c93303700e860cb

    SHA1

    33a61428c975f29d8cca1fe6f0cc7aeb1b38b1b4

    SHA256

    86c309b5823825804e3602897a79e0231274fb975ba3f6cefbc6af9e7db72e94

    SHA512

    f7f45b823f5ba529798ddb8f46c6ad0e79f9011d99bd137bd5da0bccc641d3422ae33a68b6044422957463ae5f91fa6671b9d482588358084e6cdb8725cdd76e

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/544-19-0x0000000001F80000-0x0000000001F86000-memory.dmp

    Filesize

    24KB

  • memory/544-25-0x0000000000850000-0x0000000000856000-memory.dmp

    Filesize

    24KB

  • memory/544-46-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/1548-0-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/1548-1-0x00000000004E0000-0x00000000004E6000-memory.dmp

    Filesize

    24KB

  • memory/1548-2-0x00000000004E0000-0x00000000004E6000-memory.dmp

    Filesize

    24KB

  • memory/1548-3-0x0000000000510000-0x0000000000516000-memory.dmp

    Filesize

    24KB

  • memory/1548-17-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB