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Analysis

  • max time kernel
    94s
  • max time network
    146s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240426-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
  • submitted
    04/06/2024, 17:33

General

  • Target

    2024-06-04_c19f1e5729ead9161fcc4844395095b6_cryptolocker.exe

  • Size

    81KB

  • MD5

    c19f1e5729ead9161fcc4844395095b6

  • SHA1

    c42d115322566f940a5842b418a2e0e3d56bc763

  • SHA256

    d1caeebd9ef2ec6da2ff4139b1ef03df8b8cb55e3a1d9d2fbe28e78665f8899a

  • SHA512

    5c0d9d565a58fbe2c1e8070fd7258086c71557991dfce32177a89ef470c63d3955ca5bb43bea42554585ce88bda37cb1fbdb72520dc0f7cf3c5796cb567efdb4

  • SSDEEP

    1536:zj+soPSMOtEvwDpj4ktBl01hJ0tq1ky7Qc:zCsanOtEvwDpj4

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 8 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-06-04_c19f1e5729ead9161fcc4844395095b6_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-06-04_c19f1e5729ead9161fcc4844395095b6_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:2092
    • 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:4448

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    82KB

    MD5

    6f98893cd894bbc3dbc89c651f33622b

    SHA1

    4495f25c4868b3644d4d378b1601422d78827882

    SHA256

    c3fefd22ab90ceef9d89f91f1d68334e70ecb905d36ecb1529fbba07b349cd5c

    SHA512

    32a92bbe87fbebecb7073941cc063ce305532f0323fd87cbd093bdeae650219415a0ef1f3899c701b790556e78af17ae377b2acae0c6600e4d98ccede642b773

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/2092-0-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/2092-1-0x0000000000630000-0x0000000000636000-memory.dmp

    Filesize

    24KB

  • memory/2092-2-0x00000000020F0000-0x00000000020F6000-memory.dmp

    Filesize

    24KB

  • memory/2092-9-0x0000000000630000-0x0000000000636000-memory.dmp

    Filesize

    24KB

  • memory/2092-16-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/4448-19-0x0000000000820000-0x0000000000826000-memory.dmp

    Filesize

    24KB

  • memory/4448-25-0x0000000000660000-0x0000000000666000-memory.dmp

    Filesize

    24KB

  • memory/4448-48-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB