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Analysis

  • max time kernel
    93s
  • max time network
    94s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    13/05/2024, 15:28

General

  • Target

    2024-05-13_a044aa1fd316f467029b7634fd71df51_cryptolocker.exe

  • Size

    37KB

  • MD5

    a044aa1fd316f467029b7634fd71df51

  • SHA1

    c1f6b01a09c23c0bfb97b8748126ffeabde66833

  • SHA256

    9f4659371a8c8bd559b7bc918d339499320b222c50ff16521e4ed95bca66366b

  • SHA512

    6ae57ff44cc2680ec4ac4f822b48ff31275ddbc3c626ad4d1d0421c065316de9689a8dd20846939589880fad14388968e7bf4b88679fd62988944dbab7fbebd6

  • SSDEEP

    768:fTz7y3lhsT+hs1SQtOOtEvwDpjfAu9+4Y:fT+hsMQMOtEvwDpjoIHY

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 1 IoCs
  • Detection of Cryptolocker Samples 1 IoCs
  • Checks computer location settings 2 TTPs 2 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Executes dropped EXE 1 IoCs
  • 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\2024-05-13_a044aa1fd316f467029b7634fd71df51_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-13_a044aa1fd316f467029b7634fd71df51_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4004
    • 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:4136

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    38KB

    MD5

    cf13eeacb30924cd16ccea086fdaa7e2

    SHA1

    511f25f99b5835e3e33b322b7705403af3a9f36a

    SHA256

    5e301ffb61dc32e0b3a25bae5d48eaa84d6df666c044889dffcd95a009b0273c

    SHA512

    ba4bf2556db663bb7b64eb811c18c7515ea01bab08e5956560e760e111f16d0743dd5c418792890979bda2a311302884696e51aca8a7d97ddffd031a8f40a909

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/4004-0-0x0000000002050000-0x0000000002056000-memory.dmp

    Filesize

    24KB

  • memory/4004-1-0x0000000002070000-0x0000000002076000-memory.dmp

    Filesize

    24KB

  • memory/4004-8-0x0000000002050000-0x0000000002056000-memory.dmp

    Filesize

    24KB

  • memory/4136-17-0x00000000004F0000-0x00000000004F6000-memory.dmp

    Filesize

    24KB

  • memory/4136-23-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB