Analysis

  • max time kernel
    149s
  • max time network
    152s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240426-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
  • submitted
    02/06/2024, 22:29

General

  • Target

    2024-06-02_f6aa69c58af44f63af3caf5aa9de898b_cryptolocker.exe

  • Size

    72KB

  • MD5

    f6aa69c58af44f63af3caf5aa9de898b

  • SHA1

    afd5f487b9ba2a4b3275b061109c35de089d1e2f

  • SHA256

    a16bb554ebec21a4791dd085377e00c0dc2ca95c2ec6be8680cd2137cf43227e

  • SHA512

    31ebf7650b22c4917b5a3bb7ee3f1e980a5a59d54169dc70131ca4386faa37a79257faf1133ae195bb412430eec7892bd8af01063769d7ba3f1722d9207d5c0a

  • SSDEEP

    1536:nj+4zs2cPVhlMOtEvwDpj4H8u8rZVTs97xr+:C4Q2c94OtEvwDpj4H8z1

Score
9/10
upx

Malware Config

Signatures

  • Detection of CryptoLocker Variants 4 IoCs
  • Detection of Cryptolocker Samples 2 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\2024-06-02_f6aa69c58af44f63af3caf5aa9de898b_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-06-02_f6aa69c58af44f63af3caf5aa9de898b_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:3336
    • 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:3704

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

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

    Filesize

    73KB

    MD5

    2c67e5fad2ca867049d38daa1b9c61ff

    SHA1

    e0608aec4d45c928f76f9cbd166a8e374195bb5e

    SHA256

    ec80540999ade45a9480d9b4d0fbd9b117effa757b7c426a50531c7922cf9d79

    SHA512

    4885878c3c1276c742a5bfecf30be6eb7b1580fce8235311f8f12a98c5cd19b9084f3f16a6ce64988ff675a29ffafa1ad80b7f12668c56db05bf9ad26ed44d52

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/3336-0-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/3336-1-0x00000000006A0000-0x00000000006A6000-memory.dmp

    Filesize

    24KB

  • memory/3336-2-0x00000000006C0000-0x00000000006C6000-memory.dmp

    Filesize

    24KB

  • memory/3336-9-0x00000000006A0000-0x00000000006A6000-memory.dmp

    Filesize

    24KB

  • memory/3336-17-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/3704-19-0x0000000002100000-0x0000000002106000-memory.dmp

    Filesize

    24KB

  • memory/3704-25-0x00000000006B0000-0x00000000006B6000-memory.dmp

    Filesize

    24KB

  • memory/3704-49-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB