Analysis

  • max time kernel
    130s
  • max time network
    138s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240426-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
  • submitted
    15/05/2024, 12:35

General

  • Target

    2024-05-15_7d78a0b9073d2368cdfdebe73577c980_cryptolocker.exe

  • Size

    70KB

  • MD5

    7d78a0b9073d2368cdfdebe73577c980

  • SHA1

    c2fe35d463be4a453dd5ad6987df4f77d4fe3895

  • SHA256

    cd3dd26d5db83692ef8f64920875b0cea14489a44542b2f48f683f16badac052

  • SHA512

    c624ef354e0adc2550357e90c4b10086a20201378a5d398718fb1eb8a11755ed4952df9aa98c42fa614439f686b9e36eda51df8dd010a3a59d538d8e21a81dfc

  • SSDEEP

    1536:nj+4zs2cPVhlMOtEvwDpj4H8u8rZVTs9Y:C4Q2c94OtEvwDpj4H8zp

Score
9/10
upx

Malware Config

Signatures

  • Detection of CryptoLocker Variants 4 IoCs
  • Detection of Cryptolocker Samples 2 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\2024-05-15_7d78a0b9073d2368cdfdebe73577c980_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-15_7d78a0b9073d2368cdfdebe73577c980_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:3356
    • 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:2464

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

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

          Filesize

          71KB

          MD5

          15a62d2eb12bd39ecb09dc89130cbd0c

          SHA1

          48241fc304039cd0a99ac564a459db3af7aa07d2

          SHA256

          35bfa23da25d053293f4221d387869dc9156e9ebd79a3c10f50218d35d9abf02

          SHA512

          d460237140d37ded6fcafeca290e28476d04932e4555c07dfcba6bcc85fd04819f5f07fd1147e506e507cfa7abafe80cd47ed50480cbe16670d73dc8c35e9446

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

          Filesize

          315B

          MD5

          a34ac19f4afae63adc5d2f7bc970c07f

          SHA1

          a82190fc530c265aa40a045c21770d967f4767b8

          SHA256

          d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

          SHA512

          42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

        • memory/2464-27-0x0000000000500000-0x0000000000510000-memory.dmp

          Filesize

          64KB

        • memory/2464-21-0x00000000006C0000-0x00000000006C6000-memory.dmp

          Filesize

          24KB

        • memory/2464-20-0x00000000006A0000-0x00000000006A6000-memory.dmp

          Filesize

          24KB

        • memory/3356-0-0x0000000000500000-0x0000000000510000-memory.dmp

          Filesize

          64KB

        • memory/3356-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

          Filesize

          24KB

        • memory/3356-2-0x0000000000660000-0x0000000000666000-memory.dmp

          Filesize

          24KB

        • memory/3356-9-0x00000000004D0000-0x00000000004D6000-memory.dmp

          Filesize

          24KB

        • memory/3356-18-0x0000000000500000-0x0000000000510000-memory.dmp

          Filesize

          64KB