Analysis

  • max time kernel
    141s
  • max time network
    125s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240426-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
  • submitted
    10/05/2024, 07:28

General

  • Target

    2024-05-10_2b1c1aaf6870c2e449f2db15022af353_cryptolocker.exe

  • Size

    73KB

  • MD5

    2b1c1aaf6870c2e449f2db15022af353

  • SHA1

    5ae51d766186042b405b4629c7cd1cd5ef48fa74

  • SHA256

    961ca367c008b21171e00d263cd66930a045f7329c3052ef3d2f463d35c60edd

  • SHA512

    ccc6a2030fe5a08bffbe8618e5f93bb9648008c746faae05eb5e89f8e6bb55d032a9136cb821765300e3a128a2d38e08cc68f64642daa4320f54197aa26a78a9

  • SSDEEP

    1536:nj+4zs2cPVhlMOtEvwDpj4H8u8rZVTs9VZ:C4Q2c94OtEvwDpj4H8z+

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\2024-05-10_2b1c1aaf6870c2e449f2db15022af353_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-10_2b1c1aaf6870c2e449f2db15022af353_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:2728
    • 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:4388

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

        Loading Replay Monitor...

        Downloads

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

          Filesize

          73KB

          MD5

          758518110c381c1d72ab35c58fe923e7

          SHA1

          cd955bea74049fb0ce288637d14dc8ceedf8ea48

          SHA256

          27a6245c67e3833aa718b7d7fe2628b255c6e3c095343b79cb16de0de6fe2f1a

          SHA512

          4925de9692effd7963631e2f292b4b4191512871b8b18144a861350a544a41f534b4a5fc7184e49172da5d143616018d6267b37568049ec4cd93c3e02a205235

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

          Filesize

          315B

          MD5

          a34ac19f4afae63adc5d2f7bc970c07f

          SHA1

          a82190fc530c265aa40a045c21770d967f4767b8

          SHA256

          d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

          SHA512

          42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

        • memory/2728-0-0x0000000000500000-0x0000000000510000-memory.dmp

          Filesize

          64KB

        • memory/2728-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

          Filesize

          24KB

        • memory/2728-2-0x00000000004F0000-0x00000000004F6000-memory.dmp

          Filesize

          24KB

        • memory/2728-9-0x00000000004D0000-0x00000000004D6000-memory.dmp

          Filesize

          24KB

        • memory/2728-19-0x0000000000500000-0x0000000000510000-memory.dmp

          Filesize

          64KB

        • memory/4388-17-0x0000000000500000-0x0000000000510000-memory.dmp

          Filesize

          64KB

        • memory/4388-21-0x0000000002080000-0x0000000002086000-memory.dmp

          Filesize

          24KB

        • memory/4388-27-0x0000000002050000-0x0000000002056000-memory.dmp

          Filesize

          24KB

        • memory/4388-50-0x0000000000500000-0x0000000000510000-memory.dmp

          Filesize

          64KB