Analysis

  • max time kernel
    147s
  • max time network
    152s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    06/04/2024, 07:33

General

  • Target

    2024-04-06_6b4705691ad145907fb723504a5fbbb8_cryptolocker.exe

  • Size

    69KB

  • MD5

    6b4705691ad145907fb723504a5fbbb8

  • SHA1

    65c803decf76f348991233101c45f9e20b6aef43

  • SHA256

    1ff5449e10fd647aacc148947779b3603d00771a36adacf06dffbb57780d2bbd

  • SHA512

    6eab168c2904c7d5ec86a95935c201b3cf169a419dcf500bf7ce2cee90b7c3d056afd2e1028b87cbec55e7488f42d5a5dcdcb4e0d67525df02a5aadbcff73857

  • SSDEEP

    1536:nj+4zs2cPVhlMOtEvwDpj4H8u8rZVTs9B:C4Q2c94OtEvwDpj4H8zA

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\2024-04-06_6b4705691ad145907fb723504a5fbbb8_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-04-06_6b4705691ad145907fb723504a5fbbb8_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:5020
    • 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:372

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

        Loading Replay Monitor...

        Downloads

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

          Filesize

          69KB

          MD5

          8415a18deb7438614fe38b319bb24af0

          SHA1

          4f206ec99bbbcc90ed748cec48954e22a642888e

          SHA256

          75bbe6a32b5555928a3cc9725ac0861a6e5e4865c19b6d1e50825eb540d9045a

          SHA512

          ac15c84e3591e1e728d0b1a108e00f533dd3d5313669847e52f4ebd9c1d5e036b45ec067cdb6875baa8ab6469b5978c55cb2faae53950038b952b08c14281198

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

          Filesize

          315B

          MD5

          a34ac19f4afae63adc5d2f7bc970c07f

          SHA1

          a82190fc530c265aa40a045c21770d967f4767b8

          SHA256

          d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

          SHA512

          42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

        • memory/372-19-0x00000000004F0000-0x00000000004F6000-memory.dmp

          Filesize

          24KB

        • memory/372-20-0x00000000004D0000-0x00000000004D6000-memory.dmp

          Filesize

          24KB

        • memory/372-48-0x0000000000500000-0x0000000000510000-memory.dmp

          Filesize

          64KB

        • memory/5020-0-0x0000000000500000-0x0000000000510000-memory.dmp

          Filesize

          64KB

        • memory/5020-1-0x0000000002050000-0x0000000002056000-memory.dmp

          Filesize

          24KB

        • memory/5020-2-0x0000000002050000-0x0000000002056000-memory.dmp

          Filesize

          24KB

        • memory/5020-3-0x0000000002070000-0x0000000002076000-memory.dmp

          Filesize

          24KB

        • memory/5020-18-0x0000000000500000-0x0000000000510000-memory.dmp

          Filesize

          64KB