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Analysis

  • max time kernel
    129s
  • max time network
    123s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240426-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
  • submitted
    25/05/2024, 03:28

General

  • Target

    2024-05-25_220183e5c9541cb21a4aabb39f78928a_cryptolocker.exe

  • Size

    70KB

  • MD5

    220183e5c9541cb21a4aabb39f78928a

  • SHA1

    cde1a57c4cd9044adc20da968dcd970716e9f6aa

  • SHA256

    b3373e05a0c094d1c601b5315f524ea75742c86091a19e5a6bec9501efd9f864

  • SHA512

    425dd26b9f3c393c5138ef8834a2af65751728e323a4ae6c15e4d45d0c72f9200e4cf863daf77a7757e99860f9b9e698839d14d0740c17689c70f71895ee77ff

  • SSDEEP

    1536:nj+4zs2cPVhlMOtEvwDpj4H8u8rZVTs96:C4Q2c94OtEvwDpj4H8zP

Score
9/10
upx

Malware Config

Signatures

  • Detection of CryptoLocker Variants 4 IoCs
  • Detection of Cryptolocker Samples 2 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 8 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-05-25_220183e5c9541cb21a4aabb39f78928a_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-25_220183e5c9541cb21a4aabb39f78928a_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:5072
    • 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:1784

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    70KB

    MD5

    fd826da775684d7212bcf936594ffa54

    SHA1

    b48a1640d9fce2ced2036a28cba78428e57f86b4

    SHA256

    0c071d31a15cfe339ca4400d7a7c51b952ea6e9fff1f24fb61dc5df95e4ef3e7

    SHA512

    a24e62a0909131bde1c47f34473cbccfdde2b17a957a569ac73228fdbc0ba3543b7c27a153a186edc667f12d9825509aa1b03298db0a91b81738b3aaeb6c0857

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/1784-20-0x0000000002070000-0x0000000002076000-memory.dmp

    Filesize

    24KB

  • memory/1784-26-0x0000000002050000-0x0000000002056000-memory.dmp

    Filesize

    24KB

  • memory/1784-49-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/5072-0-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/5072-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/5072-2-0x00000000004F0000-0x00000000004F6000-memory.dmp

    Filesize

    24KB

  • memory/5072-9-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/5072-18-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB