Analysis

  • max time kernel
    89s
  • max time network
    124s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231222-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system
  • submitted
    28/01/2024, 03:40

General

  • Target

    2024-01-28_e4ecc1e43d5d4e0ead10deea942501e0_cryptolocker.exe

  • Size

    78KB

  • MD5

    e4ecc1e43d5d4e0ead10deea942501e0

  • SHA1

    f118c7e48daabbafa5bc10a418fc97b761f6de48

  • SHA256

    1815b5c09ae4e1d1b2cf46131eec352236815490abe62da72447a86680df2411

  • SHA512

    e090fd1690fe614249c185651c54ad2da3c4a10fa135fca32ad62d150fcbaac325fa8599d9ab6de48b1f3ecf9fed419550b3a39e597a34f90ddce3062d4fdb42

  • SSDEEP

    1536:zj+soPSMOtEvwDpj4ktBl01hJ0tq1ky7Qc7:zCsanOtEvwDpj0

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\2024-01-28_e4ecc1e43d5d4e0ead10deea942501e0_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-01-28_e4ecc1e43d5d4e0ead10deea942501e0_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:2472
    • 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:3812

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

        Loading Replay Monitor...

        Downloads

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

          Filesize

          78KB

          MD5

          1ec40be66127f0e99aa1fc366838979a

          SHA1

          aa91bc86c1c798f0964d3c05a4afb47b1c201533

          SHA256

          300875993310057cb920826e648a94ef4d10b24f0de3fe2152cbc6f82e69338e

          SHA512

          3dddbd8f66370432f388c1c80ffc059581b2efb2ce2d609d28a563f1cbdc7545fb45d14c7ae80e1bb791139ca6c11ec322beefd72752194aefcfafd43cb88bc5

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

          Filesize

          315B

          MD5

          a34ac19f4afae63adc5d2f7bc970c07f

          SHA1

          a82190fc530c265aa40a045c21770d967f4767b8

          SHA256

          d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

          SHA512

          42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

        • memory/2472-0-0x0000000000500000-0x0000000000510000-memory.dmp

          Filesize

          64KB

        • memory/2472-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

          Filesize

          24KB

        • memory/2472-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

          Filesize

          24KB

        • memory/2472-3-0x00000000004F0000-0x00000000004F6000-memory.dmp

          Filesize

          24KB

        • memory/2472-17-0x0000000000500000-0x0000000000510000-memory.dmp

          Filesize

          64KB

        • memory/3812-19-0x00000000007D0000-0x00000000007D6000-memory.dmp

          Filesize

          24KB

        • memory/3812-21-0x00000000006A0000-0x00000000006A6000-memory.dmp

          Filesize

          24KB

        • memory/3812-48-0x0000000000500000-0x0000000000510000-memory.dmp

          Filesize

          64KB