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Analysis

  • max time kernel
    149s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    06/06/2024, 20:05

General

  • Target

    2024-06-06_bc0e5e60a5c00404f13de8803b0afdfe_cryptolocker.exe

  • Size

    75KB

  • MD5

    bc0e5e60a5c00404f13de8803b0afdfe

  • SHA1

    2b06af060b32d99d66ebf437ca4b9fde6e82a060

  • SHA256

    74c84fd48eb2753f57b18f4fe6187cc14ca22e64ce0b93e26cac6c4e8961f9be

  • SHA512

    b057030dd61230854a99d63e95b1cc8eefe79f7d8dfaf68322cd39eeb79888be1cb401bd2883afecfe5b9318607907cbbfadd1e6ff1a50b7a842bc4a7f121876

  • SSDEEP

    1536:nj+4zs2cPVhlMOtEvwDpj4H8u8rZVTs9Vq:C4Q2c94OtEvwDpj4H8zV

Score
9/10
upx

Malware Config

Signatures

  • Detection of CryptoLocker Variants 5 IoCs
  • Detection of Cryptolocker Samples 3 IoCs
  • UPX dump on OEP (original entry point) 5 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 5 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\2024-06-06_bc0e5e60a5c00404f13de8803b0afdfe_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-06-06_bc0e5e60a5c00404f13de8803b0afdfe_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:388
    • 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:1684

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    75KB

    MD5

    45a2247700efb44573e8008752baf19c

    SHA1

    600047775734039ba32556e435db08df779c3295

    SHA256

    cd176511933a9cdb1dcbe430f07f91e63dbfe5767e275948715a6ef26073a1d5

    SHA512

    744e44d85e4af3044d6ccec9627f69c02c1391f023360891e1097a24765d5d96b7d00f889ce6b32754ac187981702741d161543c60d44888ca3a933d6b9b83f0

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/388-0-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/388-1-0x0000000000730000-0x0000000000736000-memory.dmp

    Filesize

    24KB

  • memory/388-2-0x00000000020F0000-0x00000000020F6000-memory.dmp

    Filesize

    24KB

  • memory/388-9-0x0000000000730000-0x0000000000736000-memory.dmp

    Filesize

    24KB

  • memory/388-19-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/1684-18-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/1684-21-0x00000000004F0000-0x00000000004F6000-memory.dmp

    Filesize

    24KB

  • memory/1684-27-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/1684-51-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB