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Analysis

  • max time kernel
    101s
  • max time network
    138s
  • 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, 18:48

General

  • Target

    2024-02-13_d2eeadf2a312b9ad5dbb0c1119aa28a1_cryptolocker.exe

  • Size

    62KB

  • MD5

    d2eeadf2a312b9ad5dbb0c1119aa28a1

  • SHA1

    9d5f543ae3eca10c3c96b035dc43d5c331406a7e

  • SHA256

    31a89418a9155b8121ba290ab50182d0ced62701ca729d59fae6112c54229e74

  • SHA512

    1b70112324ea8170cd1d6728d3940bd0c6b09798e0521c4c228bc25048abed4b8375df591d5203974074266b8609038e3112c10a10bfce7f0757df7e6c17da76

  • SSDEEP

    768:zQz7yVEhs9+syJP6ntOOtEvwDpjFelaB7yBEY9Su8F5mnV9:zj+soPSMOtEvwDpj4kpmeLmnX

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\2024-02-13_d2eeadf2a312b9ad5dbb0c1119aa28a1_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-02-13_d2eeadf2a312b9ad5dbb0c1119aa28a1_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:220
    • 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:1872

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    62KB

    MD5

    175393032b175552d08244ea352fb519

    SHA1

    8799b281a1e454f52cfa7dfb8f35fd5d0231d474

    SHA256

    09ee2ca5956f9866cb1e8e68fad358f3e42acbd4bd3fe9dce39f70f9946e6e9e

    SHA512

    1326d2364c3557c9e391b382318eb2c21355c5c9cf7e833c2e1569ee2ca37f5dadbad8b838feb109c15fc0f31757f7a1b2cd80cf15e1c175aa3e78796349efff

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/220-0-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/220-1-0x00000000005A0000-0x00000000005A6000-memory.dmp

    Filesize

    24KB

  • memory/220-2-0x00000000005A0000-0x00000000005A6000-memory.dmp

    Filesize

    24KB

  • memory/220-3-0x00000000006C0000-0x00000000006C6000-memory.dmp

    Filesize

    24KB

  • memory/220-17-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/1872-19-0x00000000006D0000-0x00000000006D6000-memory.dmp

    Filesize

    24KB

  • memory/1872-25-0x00000000006B0000-0x00000000006B6000-memory.dmp

    Filesize

    24KB

  • memory/1872-48-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB