Analysis

  • max time kernel
    133s
  • 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
    01/06/2024, 13:04

General

  • Target

    2024-06-01_1ac30f870574d3bef484d671d11413ae_cryptolocker.exe

  • Size

    71KB

  • MD5

    1ac30f870574d3bef484d671d11413ae

  • SHA1

    beea14b23d6d737b3de447a08f2f44b48fb50f4e

  • SHA256

    52bb9c3e72e991fe28de0a3cb568c9e0bb8856727830bb75a99f092fb9804611

  • SHA512

    b15e8c163d7ba23bd5351c01f22eddf3a1263c8c55b597cfbca4b5c71c92eefc90524e38b8c2418e4edee47fbb72d05677e16c1e79dc4c4b31a1212c32ce7167

  • SSDEEP

    1536:nj+4zs2cPVhlMOtEvwDpj4H8u8rZVTs95OJ:C4Q2c94OtEvwDpj4H8zr

Score
9/10
upx

Malware Config

Signatures

  • Detection of CryptoLocker Variants 5 IoCs
  • Detection of Cryptolocker Samples 4 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\2024-06-01_1ac30f870574d3bef484d671d11413ae_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-06-01_1ac30f870574d3bef484d671d11413ae_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:232
    • 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:3608

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

        Loading Replay Monitor...

        Downloads

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

          Filesize

          72KB

          MD5

          30682c352492f149da2eca701d7bc5f0

          SHA1

          1da15f3d4f9bb9b680181b0076844a91594e19ad

          SHA256

          6d6be2c534c8fe77536b7efec4c0455b9da38b843e010489b292421946341903

          SHA512

          a93b99712ca8be1afa2e0c68bcff04b54982056b4fb638cc0054a696c791c1fb687933abfd6ed97dc567696daee8915cdf2e054e7c3c76c707c0cf141ce9cedf

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

          Filesize

          315B

          MD5

          a34ac19f4afae63adc5d2f7bc970c07f

          SHA1

          a82190fc530c265aa40a045c21770d967f4767b8

          SHA256

          d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

          SHA512

          42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

        • memory/232-0-0x0000000000500000-0x0000000000510000-memory.dmp

          Filesize

          64KB

        • memory/232-1-0x0000000000560000-0x0000000000566000-memory.dmp

          Filesize

          24KB

        • memory/232-4-0x0000000000560000-0x0000000000566000-memory.dmp

          Filesize

          24KB

        • memory/232-2-0x0000000002070000-0x0000000002076000-memory.dmp

          Filesize

          24KB

        • memory/232-18-0x0000000000500000-0x0000000000510000-memory.dmp

          Filesize

          64KB

        • memory/3608-19-0x0000000000500000-0x0000000000510000-memory.dmp

          Filesize

          64KB

        • memory/3608-21-0x00000000006C0000-0x00000000006C6000-memory.dmp

          Filesize

          24KB

        • memory/3608-27-0x00000000006A0000-0x00000000006A6000-memory.dmp

          Filesize

          24KB

        • memory/3608-53-0x0000000000500000-0x0000000000510000-memory.dmp

          Filesize

          64KB