Analysis

  • max time kernel
    149s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240419-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system
  • submitted
    03-05-2024 10:04

General

  • Target

    2024-05-03_bc35d3ecb9929dff7a9c10be3c31a10d_cryptolocker.exe

  • Size

    72KB

  • MD5

    bc35d3ecb9929dff7a9c10be3c31a10d

  • SHA1

    2800de97c1b14456ae52e9f0580049542a4e14bb

  • SHA256

    e26147442ac6b97b4f210d7c6e2c4aa8d52f3a68ad926b2dc4fb4ea708b4553f

  • SHA512

    36f76853a5230f0a4de4eca828aa11c3b1ca548f5a14db6930df6c97deb5fdd98c9e6124c702ffb4e7e8e7b36bb877bd4cd005ac59c6136eaa3f21f7a27a3db7

  • SSDEEP

    1536:nj+4zs2cPVhlMOtEvwDpj4H8u8rZVTs9I:C4Q2c94OtEvwDpj4H8zR

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\2024-05-03_bc35d3ecb9929dff7a9c10be3c31a10d_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-03_bc35d3ecb9929dff7a9c10be3c31a10d_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4412
    • 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:2352

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    72KB

    MD5

    85f7e79ff550623f3f4df584be92bfc2

    SHA1

    028d6d695ed235cf455132293885bb9bc685a379

    SHA256

    261ff6b856f9df227a08ea669099283f4de1624a260627a635d513b9224aa350

    SHA512

    e6748cbd11fe410d5940f123effbdba5943a9b809afa895ea6fd7991a5c516c4137f07a67730d860acd0a673a640b0ea9bf76ad4dfa40228303c2185a733df68

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/2352-20-0x0000000002060000-0x0000000002066000-memory.dmp

    Filesize

    24KB

  • memory/2352-26-0x00000000021D0000-0x00000000021D6000-memory.dmp

    Filesize

    24KB

  • memory/2352-50-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/4412-0-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/4412-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/4412-2-0x00000000004F0000-0x00000000004F6000-memory.dmp

    Filesize

    24KB

  • memory/4412-9-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/4412-17-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB