Analysis

  • max time kernel
    139s
  • max time network
    124s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    17/05/2024, 03:33

General

  • Target

    2024-05-17_8b4389fcd39e6bcb128816fc847bd20f_cryptolocker.exe

  • Size

    80KB

  • MD5

    8b4389fcd39e6bcb128816fc847bd20f

  • SHA1

    b895eafe43ea201cc55362762cc1ec8659fca421

  • SHA256

    d0a7f6b75303f8874947440ca86fb91989165bb7b604f1df068e68b6be9bcba4

  • SHA512

    87607a1404e799c6ed7f1efbc21e7cc0306734097bbccef27ecec25104a26bdb9592ccd59961df3f811705d6de2a37e719e94592aae00a9b360a0928417c4d5b

  • SSDEEP

    1536:zj+soPSMOtEvwDpj4ktBl01hJ0tq1ky7QM:zCsanOtEvwDpjY

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 8 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-05-17_8b4389fcd39e6bcb128816fc847bd20f_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-17_8b4389fcd39e6bcb128816fc847bd20f_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:3568
    • 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:4436

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

        Loading Replay Monitor...

        Downloads

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

          Filesize

          81KB

          MD5

          5b8f4711fb74bb03769fda9d8eba0d3a

          SHA1

          8431761704afe60531a952bd8cb352349722399d

          SHA256

          c966f316715653dcb964d3aec4425a3bddd78d3ba98b6f1d575248f97ea992c3

          SHA512

          8e0cbfc9655fc70aec9ddea733f6058b9998b626eced419e57b3cab12409e437712451f927264f2a5b826d8ba73c72d7550e81aabf724b1a6941b91b7f2ff491

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

          Filesize

          315B

          MD5

          a34ac19f4afae63adc5d2f7bc970c07f

          SHA1

          a82190fc530c265aa40a045c21770d967f4767b8

          SHA256

          d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

          SHA512

          42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

        • memory/3568-0-0x0000000000500000-0x0000000000510000-memory.dmp

          Filesize

          64KB

        • memory/3568-1-0x00000000005B0000-0x00000000005B6000-memory.dmp

          Filesize

          24KB

        • memory/3568-2-0x00000000005D0000-0x00000000005D6000-memory.dmp

          Filesize

          24KB

        • memory/3568-9-0x00000000005B0000-0x00000000005B6000-memory.dmp

          Filesize

          24KB

        • memory/3568-17-0x0000000000500000-0x0000000000510000-memory.dmp

          Filesize

          64KB

        • memory/4436-19-0x00000000006C0000-0x00000000006C6000-memory.dmp

          Filesize

          24KB

        • memory/4436-25-0x00000000006A0000-0x00000000006A6000-memory.dmp

          Filesize

          24KB

        • memory/4436-48-0x0000000000500000-0x0000000000510000-memory.dmp

          Filesize

          64KB