Analysis

  • max time kernel
    135s
  • max time network
    125s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240419-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system
  • submitted
    07/05/2024, 04:28

General

  • Target

    2024-05-07_36df8da7ebf310d2f94c41bf185f14d4_cryptolocker.exe

  • Size

    89KB

  • MD5

    36df8da7ebf310d2f94c41bf185f14d4

  • SHA1

    801fd28245107419efd19be9f5ba661692018454

  • SHA256

    34561f8efbb025c30e3624d1a5744b677caed16b33c71372b4eb6ca8fd8a816a

  • SHA512

    790b081ddd4effed75f9528cae59536f79292741a631e9ee83fb11df62b8a6d8de2c0ab611c697d2fc3c44089e1c7aca80f90e7e467c463bc9472aa95a00f158

  • SSDEEP

    1536:zj+soPSMOtEvwDpj4ktBl01hJl8QAPM8Ho6cRMy8tybl9:zCsanOtEvwDpjW

Score
9/10
upx

Malware Config

Signatures

  • Detection of CryptoLocker Variants 5 IoCs
  • Detection of Cryptolocker Samples 5 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\2024-05-07_36df8da7ebf310d2f94c41bf185f14d4_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-07_36df8da7ebf310d2f94c41bf185f14d4_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:2848
    • 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:1212

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

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

          Filesize

          89KB

          MD5

          21dc310e46149236f3962f2414845ff7

          SHA1

          7b3451b30428fc6a98277443de473f79631f4f54

          SHA256

          57112435198b1e5fb3c7532efb15e61dff1a869b0b23652c7e6b10ec5b635633

          SHA512

          ed016258f84cfa6c30959698af286c98b7ce34289aed3c34acf5f5869827a254fafd14ddb7dbf05316130ae8cca7ad5192e6b5c5adf901022bc9536f0ffdda21

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

          Filesize

          315B

          MD5

          a34ac19f4afae63adc5d2f7bc970c07f

          SHA1

          a82190fc530c265aa40a045c21770d967f4767b8

          SHA256

          d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

          SHA512

          42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

        • memory/1212-17-0x0000000000500000-0x0000000000510000-memory.dmp

          Filesize

          64KB

        • memory/1212-20-0x00000000006C0000-0x00000000006C6000-memory.dmp

          Filesize

          24KB

        • memory/1212-26-0x00000000006A0000-0x00000000006A6000-memory.dmp

          Filesize

          24KB

        • memory/1212-49-0x0000000000500000-0x0000000000510000-memory.dmp

          Filesize

          64KB

        • memory/2848-0-0x0000000000500000-0x0000000000510000-memory.dmp

          Filesize

          64KB

        • memory/2848-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

          Filesize

          24KB

        • memory/2848-2-0x00000000004F0000-0x00000000004F6000-memory.dmp

          Filesize

          24KB

        • memory/2848-9-0x00000000004D0000-0x00000000004D6000-memory.dmp

          Filesize

          24KB

        • memory/2848-18-0x0000000000500000-0x0000000000510000-memory.dmp

          Filesize

          64KB