Analysis

  • max time kernel
    148s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    03/06/2024, 18:54

General

  • Target

    2024-06-03_5013df3a309af671baf9754241b5a93c_cryptolocker.exe

  • Size

    82KB

  • MD5

    5013df3a309af671baf9754241b5a93c

  • SHA1

    73fba610bd72aa85fa6a65e01b8b6481b6e54e87

  • SHA256

    00e3408d41edeb344772da27be8f36c93e3fe388e8ea6c5d3fe021007f3d14dd

  • SHA512

    a3e1f83d493d742caa7bd6b4b11895184ffd37dfd3e23a263ab2195db89509fa2c73da7940f323218ce3069a1c00cc509d093d04abec8587e9ae923357f7f978

  • SSDEEP

    1536:zj+soPSMOtEvwDpj4ktBl01hJ0tq1ky7QpSxl:zCsanOtEvwDpj4

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\2024-06-03_5013df3a309af671baf9754241b5a93c_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-06-03_5013df3a309af671baf9754241b5a93c_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:1780
    • 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:924

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    82KB

    MD5

    aba0437c2f74a1f203ffdce67870e501

    SHA1

    5296e709ed168a6c991499f4026515178ee68fbe

    SHA256

    f8b5efb434d6a58454799caac2446a4929b322bc91abf800fac772be8f1c8846

    SHA512

    1c5aea4f6a6f4ff23ca7a7c924e285eb13c2f9bc87c6a5d29a56592a81abbdfa8fc8cc3450a534a4f6859393e661b320f486c1c6a01d8174816eb45dd97d9a55

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/924-17-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/924-20-0x00000000004F0000-0x00000000004F6000-memory.dmp

    Filesize

    24KB

  • memory/924-26-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/924-49-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/1780-0-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/1780-1-0x00000000021E0000-0x00000000021E6000-memory.dmp

    Filesize

    24KB

  • memory/1780-2-0x0000000001FF0000-0x0000000001FF6000-memory.dmp

    Filesize

    24KB

  • memory/1780-9-0x00000000021E0000-0x00000000021E6000-memory.dmp

    Filesize

    24KB

  • memory/1780-18-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB