Analysis

  • max time kernel
    150s
  • 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
    07/05/2024, 04:25

General

  • Target

    2024-05-07_1874035581d07e53c7717d1ae2a64859_cryptolocker.exe

  • Size

    72KB

  • MD5

    1874035581d07e53c7717d1ae2a64859

  • SHA1

    ca6023f530ba652370ace60677669f1d117416a3

  • SHA256

    f16935efffa821996453242e4361a8f2d55586d88a82cb6d62615e49e4f4ef43

  • SHA512

    97d615a45af7eb6b1357f7912c8014075efd5776c743c6a7fa3fb7f3856a75f0d87edc3464ed8cc559bce7e50103810e4449a73bef5ed0b2bbfe635ed54dea50

  • SSDEEP

    1536:nj+4zs2cPVhlMOtEvwDpj4H8u8rZVTs93:C4Q2c94OtEvwDpj4H8zK

Score
9/10
upx

Malware Config

Signatures

  • Detection of CryptoLocker Variants 5 IoCs
  • Detection of Cryptolocker Samples 2 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\2024-05-07_1874035581d07e53c7717d1ae2a64859_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-07_1874035581d07e53c7717d1ae2a64859_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:3064
    • 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:5040

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

        Loading Replay Monitor...

        Downloads

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

          Filesize

          72KB

          MD5

          6cf8ca911af5beabd957b94bf6b73986

          SHA1

          6fdb73d548b19e80066be4fabb26396de91cc314

          SHA256

          3b995d2bd9e9ac40575c98f1ba91327bb7a1b8c6a27b7d0721a1211e2d71cc70

          SHA512

          d0ab295519f6a80bfddc3a5734ead325b40d35ab619036a0264a10501b824bf0b2736f29ad1b680b8a18236db0c06970c90e7ee6cf1b58367b5c755f039b71f2

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

          Filesize

          315B

          MD5

          a34ac19f4afae63adc5d2f7bc970c07f

          SHA1

          a82190fc530c265aa40a045c21770d967f4767b8

          SHA256

          d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

          SHA512

          42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

        • memory/3064-0-0x0000000000500000-0x0000000000510000-memory.dmp

          Filesize

          64KB

        • memory/3064-1-0x0000000000620000-0x0000000000626000-memory.dmp

          Filesize

          24KB

        • memory/3064-2-0x0000000000750000-0x0000000000756000-memory.dmp

          Filesize

          24KB

        • memory/3064-9-0x0000000000620000-0x0000000000626000-memory.dmp

          Filesize

          24KB

        • memory/3064-18-0x0000000000500000-0x0000000000510000-memory.dmp

          Filesize

          64KB

        • memory/5040-17-0x0000000000500000-0x0000000000510000-memory.dmp

          Filesize

          64KB

        • memory/5040-20-0x0000000002070000-0x0000000002076000-memory.dmp

          Filesize

          24KB

        • memory/5040-26-0x0000000000520000-0x0000000000526000-memory.dmp

          Filesize

          24KB

        • memory/5040-50-0x0000000000500000-0x0000000000510000-memory.dmp

          Filesize

          64KB