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Analysis

  • max time kernel
    145s
  • max time network
    154s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    28/01/2024, 19:32

General

  • Target

    2024-01-28_a09be619d349e2cbc20941d1ab1bd638_cryptolocker.exe

  • Size

    56KB

  • MD5

    a09be619d349e2cbc20941d1ab1bd638

  • SHA1

    3bd47574ab86e899afe96e7d4ef526d265200ddf

  • SHA256

    f6cea30ac4e9d7d90acf5fc2504911a7efb46a8b78891cade0395fa6bb0fee34

  • SHA512

    a973fe037c4a1c63f2ae488fccbd32218d5d0f31a5cf81e5dfd59825a2fd4602000150ddcbd633f3f2772cb3ba7a656ca241a963f126f0b1de0f97f60d3fb594

  • SSDEEP

    768:zQz7yVEhs9+syJP6ntOOtEvwDpjFeV0ZOfcpLzbvt:zj+soPSMOtEvwDpj4yzbvt

Score
9/10
upx

Malware Config

Signatures

  • Detection of CryptoLocker Variants 5 IoCs
  • Detection of Cryptolocker Samples 5 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\2024-01-28_a09be619d349e2cbc20941d1ab1bd638_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-01-28_a09be619d349e2cbc20941d1ab1bd638_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:3048
    • 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:60

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    57KB

    MD5

    3aa54f3b75e4194156fedb598f7e1117

    SHA1

    04560113c794d5e97cf219452969a253d5904232

    SHA256

    8e06fe49a103b786a6eab97ef2e243fd70f3e1f8c9111f7a7f83d2992b284755

    SHA512

    91ec4d22be58eee27f42c9144be23475c21cc97c3b4ca4d0495725e542918e9399b17ee6a26d3dd5fa1431b0148e9160b8d48ecc4ab49fad1933f81844761a24

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/60-17-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/60-20-0x0000000000750000-0x0000000000756000-memory.dmp

    Filesize

    24KB

  • memory/60-23-0x0000000000730000-0x0000000000736000-memory.dmp

    Filesize

    24KB

  • memory/60-49-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/3048-0-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/3048-1-0x00000000006A0000-0x00000000006A6000-memory.dmp

    Filesize

    24KB

  • memory/3048-2-0x00000000006A0000-0x00000000006A6000-memory.dmp

    Filesize

    24KB

  • memory/3048-3-0x00000000006C0000-0x00000000006C6000-memory.dmp

    Filesize

    24KB

  • memory/3048-19-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB