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Analysis

  • max time kernel
    149s
  • max time network
    155s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    25/03/2024, 13:25

General

  • Target

    2024-03-25_1035df6c5d3c42999fd62d2e86609063_cryptolocker.exe

  • Size

    98KB

  • MD5

    1035df6c5d3c42999fd62d2e86609063

  • SHA1

    af937edbe5fd0f676b0a7390a2ec14c575341ffb

  • SHA256

    27e2d06bd818ef96f2310db2ee8d5ec73ae27c46fc13f0fa223f0fb18cbece71

  • SHA512

    868642fd553850ba3d7d8e1953d4a74fad8a9b97c5c012fa46e7533d3eb82b3ecdcfcd6a087fe06c5daf0e8f527989a63530590d12df9e7c2f239a01d54344cb

  • SSDEEP

    1536:z6QFElP6n+gKmddpMOtEvwDpj3GYQbbr/BKiseW:z6a+CdOOtEvwDpjcgH

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 1 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).

  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-03-25_1035df6c5d3c42999fd62d2e86609063_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-03-25_1035df6c5d3c42999fd62d2e86609063_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:3332
    • C:\Users\Admin\AppData\Local\Temp\asih.exe
      "C:\Users\Admin\AppData\Local\Temp\asih.exe"
      2⤵
      • Executes dropped EXE
      PID:4228

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    98KB

    MD5

    c95aca1a47d4f3102ceea36d2bc899c4

    SHA1

    dbf42e9e7bf8639b03358fd2e408e66ad311d37d

    SHA256

    06ee473696b6978aefa67ae79e2ed4b41bc6dddb93309fd7d387bf5ed05f4578

    SHA512

    01755fd88072f13f9585075ef3033041b14dfc36416b248854c90c97c3f64afa83fd8d39108dbfd6bc275a27012829c27e68f02285e8e903ab424cdf1738f418

  • memory/3332-0-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/3332-1-0x0000000000520000-0x0000000000526000-memory.dmp

    Filesize

    24KB

  • memory/3332-2-0x0000000000520000-0x0000000000526000-memory.dmp

    Filesize

    24KB

  • memory/3332-3-0x00000000006C0000-0x00000000006C6000-memory.dmp

    Filesize

    24KB

  • memory/3332-17-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/4228-19-0x00000000004F0000-0x00000000004F6000-memory.dmp

    Filesize

    24KB

  • memory/4228-22-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/4228-26-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB