Analysis

  • max time kernel
    145s
  • max time network
    147s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    04/04/2024, 22:25

General

  • Target

    2024-04-04_3cfba78dcda6f9aa277d11101b3351c8_cryptolocker.exe

  • Size

    92KB

  • MD5

    3cfba78dcda6f9aa277d11101b3351c8

  • SHA1

    c784f015681d9abfe635e3e62feb0db128e1f07d

  • SHA256

    7c8fc2cd06ce5492079cb852f00a6df380f18b46579e1b10411b9f13727b8e81

  • SHA512

    0c9c1ed87d9a8825d72eda97dcbc31db03b17e2d4aa2a29dde561ad0fd3f8c1d03d01e06db8ed6dc57457f9c74894710226dcf356d1eeba2921cbbb0e59765ca

  • SSDEEP

    1536:zj+soPSMOtEvwDpj4ktBl01hJl8QAPM8Ho6cRDjhWTf:zCsanOtEvwDpjz

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 10 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-04-04_3cfba78dcda6f9aa277d11101b3351c8_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-04-04_3cfba78dcda6f9aa277d11101b3351c8_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:3408
    • 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:2188

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    92KB

    MD5

    977d7f4fc3ddc45db1e5ec77076261c2

    SHA1

    b4c084b3ec15813934df0067f676258f4dbd0949

    SHA256

    3dd224b79055af4f85c26fb4d17549baf28a0551872493dd535978250f300c58

    SHA512

    8bcb6c378735b6de36f3f707c66c52c43d329227dc49580d658ea4d297b5e76d9779b587cfdc0b060496d3c29a33193d93d2294b4c86ac8390127c3c6c9395c9

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/2188-19-0x0000000000860000-0x0000000000866000-memory.dmp

    Filesize

    24KB

  • memory/2188-47-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/3408-0-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/3408-1-0x00000000006A0000-0x00000000006A6000-memory.dmp

    Filesize

    24KB

  • memory/3408-2-0x00000000006A0000-0x00000000006A6000-memory.dmp

    Filesize

    24KB

  • memory/3408-3-0x00000000007D0000-0x00000000007D6000-memory.dmp

    Filesize

    24KB

  • memory/3408-17-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB