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Analysis

  • max time kernel
    148s
  • max time network
    153s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240412-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
  • submitted
    20/04/2024, 00:51

General

  • Target

    2024-04-20_cef42451928080211c4447b4d253025a_cryptolocker.exe

  • Size

    69KB

  • MD5

    cef42451928080211c4447b4d253025a

  • SHA1

    0b995833d6352493a821fe33a649988f3856d4b2

  • SHA256

    f255481163ab8077a97f60d879b64227fb2060397aa5304a6098dd7cd1b7a930

  • SHA512

    57e0779f6bf430e15e65d609b27ed4227e3ed4aa4b9a6e64e1062c46e002017601dfb3df57a436ee4bda6b2db8b170ec9c70bca245991b22d89ed46d7d9273f3

  • SSDEEP

    1536:Dk/xY0sllyGQMOtEvwDpjwycDtKkQZQRKb61vSbgZ3QzNKU50i:DW60sllyWOtEvwDpjwF85t

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 3 IoCs
  • Detection of Cryptolocker Samples 3 IoCs
  • Checks computer location settings 2 TTPs 1 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).

  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-04-20_cef42451928080211c4447b4d253025a_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-04-20_cef42451928080211c4447b4d253025a_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4280
    • C:\Users\Admin\AppData\Local\Temp\asih.exe
      "C:\Users\Admin\AppData\Local\Temp\asih.exe"
      2⤵
      • Executes dropped EXE
      PID:4452

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    70KB

    MD5

    dc53bd2ac6037be845c1e4ec4fe15968

    SHA1

    225d64e7e4319e92292e34d701ac8a0789030d94

    SHA256

    0bfa7227e7a800caa084bb5e97c9bc06dd71ba6922951ddb611fee15289df5b1

    SHA512

    053600368596a04d81dad2b13948d4654fa95dfe0ff35f797c8fdaafe2a9b98e2887f0377104fe221310b3a2d74c7bfbe034caf10e70e5119c73b0ed528962fb

  • memory/4280-0-0x0000000000500000-0x000000000050B000-memory.dmp

    Filesize

    44KB

  • memory/4280-1-0x0000000000620000-0x0000000000626000-memory.dmp

    Filesize

    24KB

  • memory/4280-2-0x0000000000620000-0x0000000000626000-memory.dmp

    Filesize

    24KB

  • memory/4280-3-0x0000000000640000-0x0000000000646000-memory.dmp

    Filesize

    24KB

  • memory/4280-17-0x0000000000500000-0x000000000050B000-memory.dmp

    Filesize

    44KB

  • memory/4452-19-0x00000000006D0000-0x00000000006D6000-memory.dmp

    Filesize

    24KB

  • memory/4452-22-0x0000000000660000-0x0000000000666000-memory.dmp

    Filesize

    24KB