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Analysis

  • max time kernel
    149s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240426-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
  • submitted
    30/05/2024, 04:26

General

  • Target

    2024-05-30_d634569c212887aac007b8daf77d3adb_cryptolocker.exe

  • Size

    95KB

  • MD5

    d634569c212887aac007b8daf77d3adb

  • SHA1

    cb22c86c73d4cfeb5ea6ed18bde78827456c9087

  • SHA256

    a919f2d7a9aa6bb0647386e64a3ff9f989874098fb979c885d9ae752e98bd540

  • SHA512

    9f2af69d64bdd0168a9cc23f514d8ff2c00c545979618e5beb01ad203e359457f5c32315a3dd09ae6ca9b39962a92941874e9737449b83083ed27ba70ff2d0a3

  • SSDEEP

    1536:zj+soPSMOtEvwDpj4ktBl01hJl8QAPM8Ho6cRDjgx/kt:zCsanOtEvwDpjBS

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 2 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).

  • Modifies system certificate store 2 TTPs 8 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-05-30_d634569c212887aac007b8daf77d3adb_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-30_d634569c212887aac007b8daf77d3adb_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:5020
    • 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:4784

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    95KB

    MD5

    04b801439ac9ff118b12ab54980e9c41

    SHA1

    837552ce32eca724a2a31112292435701cc20d75

    SHA256

    98d816663a7da7fa28e1a7b715927468a48a0a7fcfc3c49e1751a3b6c21f9604

    SHA512

    f970138e5f4ea65bf19aca9759834aad09c76c8251c45153376e9a83d9a7fb4cea67d71c06106451ec1ea450f5eff9b128593e1e73e14ea6778a06eadcf184d5

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/4784-47-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/5020-0-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/5020-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/5020-3-0x00000000004F0000-0x00000000004F6000-memory.dmp

    Filesize

    24KB

  • memory/5020-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/5020-17-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB