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Analysis

  • max time kernel
    0s
  • max time network
    121s
  • platform
    windows7_x64
  • resource
    win7-20231215-en
  • resource tags

    arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
  • submitted
    09/01/2024, 06:40

General

  • Target

    2024-01-08_4dbfb24ec6b9576ca1e5668e4c0619fe_cryptolocker.exe

  • Size

    36KB

  • MD5

    4dbfb24ec6b9576ca1e5668e4c0619fe

  • SHA1

    7b8389f21d821e184736e5e8d43ad1d0b846c30f

  • SHA256

    61c573f2cdcf8e5a2734408407559746774d5950e2ef874a38ba022d65d67bf5

  • SHA512

    e7af818e7b87f56eed3cf0a3b73d08211e2554cf2b52fd0d415befb029ecac3c6d452b4a6817d1c71ed48234654cda471d9a7b2cbfc85f13dcc8eb1c44271988

  • SSDEEP

    384:bM7Q0pjC4GybxMv01d3AcASBQMf6i/zzzcYgUPSznHzl6AJvDSuYlb:b/yC4GyNM01GuQMNXw2PSjHPbSuYlb

Score
7/10

Malware Config

Signatures

  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 1 IoCs
  • Creates a large amount of network flows 1 TTPs

    This may indicate a network scan to discover remotely running services.

  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • Suspicious use of UnmapMainImage 2 IoCs
  • Suspicious use of WriteProcessMemory 4 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-01-08_4dbfb24ec6b9576ca1e5668e4c0619fe_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-01-08_4dbfb24ec6b9576ca1e5668e4c0619fe_cryptolocker.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of UnmapMainImage
    • Suspicious use of WriteProcessMemory
    PID:2136
    • C:\Users\Admin\AppData\Local\Temp\retln.exe
      "C:\Users\Admin\AppData\Local\Temp\retln.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious use of UnmapMainImage
      PID:2712

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • \Users\Admin\AppData\Local\Temp\retln.exe

    Filesize

    37KB

    MD5

    a9262767a896c23340eac4d13216199c

    SHA1

    d11fa381dc0453297bbaf5ac215b88817fb18c3b

    SHA256

    8fee13b1d2f9b7164509c3506df9cf55b50d3879dd1f01d9baefef882092eb33

    SHA512

    35af3b7c138d041a5108c620a3b832e7cf6525d08c9edef337662c0a8dc796b49e7f24478e4abab7f343b33a6df50511e9100945807dab7a4d4d427b479a1454

  • memory/2136-1-0x0000000000400000-0x0000000000406000-memory.dmp

    Filesize

    24KB

  • memory/2136-0-0x0000000000380000-0x0000000000386000-memory.dmp

    Filesize

    24KB

  • memory/2136-8-0x0000000000380000-0x0000000000386000-memory.dmp

    Filesize

    24KB

  • memory/2712-23-0x00000000003C0000-0x00000000003C6000-memory.dmp

    Filesize

    24KB