Analysis

  • max time kernel
    150s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240426-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
  • submitted
    12-05-2024 19:21

General

  • Target

    2024-05-11_075b77c6c266863bee6595c98937ef7b_cryptolocker.exe

  • Size

    73KB

  • MD5

    075b77c6c266863bee6595c98937ef7b

  • SHA1

    8cbc2db5f1fefb88571fd1982e290585c44df54b

  • SHA256

    16a068b9a6e217e0131402239da624ae0f3498e8089dc141d17da98cd9503203

  • SHA512

    04dd6fa1a002acaab355fe84d2b98da6dd1096d8450b932e962f245e77d424f61ca60acbc589ced17222b6d15e003ac4e0e95002ff9b00b07df56698fe00bcaa

  • SSDEEP

    1536:nj+4zs2cPVhlMOtEvwDpj4H8u8rZVTs9I:C4Q2c94OtEvwDpj4H8zJ

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\2024-05-11_075b77c6c266863bee6595c98937ef7b_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-11_075b77c6c266863bee6595c98937ef7b_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4880
    • 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:4532

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    73KB

    MD5

    91e65c849dee3a8d28f42addc88b3c1f

    SHA1

    a137c8c4709fde5b45a794e724af8a0c5550c3a4

    SHA256

    7cd963bd7165ab6410659da06ddb7c9640ddb1c257f85db0eb237363cbbba966

    SHA512

    d6b3b6cc8d289f9d7ee1b1a2059a8af64990f20c2b983ab941c055ee7862644070ef36aef3f81307409ca17efd58c47ea29bfd1aa216a334dd747d94b69fbc56

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/4532-19-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/4532-21-0x0000000000510000-0x0000000000516000-memory.dmp

    Filesize

    24KB

  • memory/4532-27-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/4532-50-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/4880-0-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/4880-1-0x00000000005A0000-0x00000000005A6000-memory.dmp

    Filesize

    24KB

  • memory/4880-8-0x00000000005A0000-0x00000000005A6000-memory.dmp

    Filesize

    24KB

  • memory/4880-2-0x00000000005C0000-0x00000000005C6000-memory.dmp

    Filesize

    24KB

  • memory/4880-18-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB