Analysis

  • max time kernel
    92s
  • max time network
    129s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240426-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
  • submitted
    11-06-2024 02:30

General

  • Target

    2024-06-11_682a7a05f50648c5066dc00b5f48b127_cryptolocker.exe

  • Size

    72KB

  • MD5

    682a7a05f50648c5066dc00b5f48b127

  • SHA1

    f8a796f36cb7be82e2579ade695d6574bab675b3

  • SHA256

    63cebebbca7dd537bab4dffec9cc8072559cad0f81f6afb9dda56eb515fe1c8e

  • SHA512

    60640b2221f631260431975a649e155e7a8dbb31bff56304a1491f3fec8292047bb9352f1d5e2de96ca9555f76f879f1374ed139cabe87c0a51e8cb4d92281a2

  • SSDEEP

    1536:nj+4zs2cPVhlMOtEvwDpj4H8u8rZVTs9Hl:C4Q2c94OtEvwDpj4H8zk

Score
9/10
upx

Malware Config

Signatures

  • Detection of CryptoLocker Variants 5 IoCs
  • Detection of Cryptolocker Samples 4 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\2024-06-11_682a7a05f50648c5066dc00b5f48b127_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-06-11_682a7a05f50648c5066dc00b5f48b127_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:384
    • 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:4504

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    72KB

    MD5

    8664798ae30a23a979b2a96febe5e7dc

    SHA1

    947228aa2bcc5a6ccfdfd49ef1981e25a763c118

    SHA256

    dfa4a0c76365b88d386b008fa9e6838d3d064a7a6983d94b6148899a5717b0d1

    SHA512

    c18b7eef587f728f10cee98eb7cc1e9f9ba2c647db641c3f6dccfa376d7ac611e7f6c612c5220e19ba91b6eb216c164742c2b544f1e58b26a4ce5246829ad7da

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/384-0-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/384-1-0x00000000006B0000-0x00000000006B6000-memory.dmp

    Filesize

    24KB

  • memory/384-2-0x00000000020F0000-0x00000000020F6000-memory.dmp

    Filesize

    24KB

  • memory/384-9-0x00000000006B0000-0x00000000006B6000-memory.dmp

    Filesize

    24KB

  • memory/384-18-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/4504-19-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/4504-21-0x00000000004F0000-0x00000000004F6000-memory.dmp

    Filesize

    24KB

  • memory/4504-27-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/4504-51-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB