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
    28-05-2024 03:36

General

  • Target

    2024-05-28_49daf360b41e07ab5635f6054882ced3_cryptolocker.exe

  • Size

    90KB

  • MD5

    49daf360b41e07ab5635f6054882ced3

  • SHA1

    296cc3307f648fcd7f1c84178463298741d222b3

  • SHA256

    6baaaf0812ba551793ae2ea9b3718b816c6ac6528de45420b49214ec66241969

  • SHA512

    3120f5a3d651b99c2d36de572221a1955d621bbe20acdf06b3901aba79ffc5e416c1d383cbc64c0958445f0e352e5f920058a9550258f51d095c7bf12a74576a

  • SSDEEP

    1536:zj+soPSMOtEvwDpj4ktBl01hJl8QAPM8Ho6cRMy8tyblgC+:zCsanOtEvwDpj1

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\2024-05-28_49daf360b41e07ab5635f6054882ced3_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-28_49daf360b41e07ab5635f6054882ced3_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:2264
    • 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:4016

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    90KB

    MD5

    907c5f4e41ceb4cf5232e6c2676ec449

    SHA1

    1dadea21767d0cf9a701898301b4d6363769e33e

    SHA256

    f53986692c916c78508bcb86303a2b044be2a7788a51fa94ddf034da0f1862fe

    SHA512

    44452d6b7d0928a88738aac1561af198433c252bd85da60ec0d7ede04a9936abd9fbbc134d605cd56eac963f6b4bf67a7125a9a071c1b99d2c92c9b5706fcd41

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/2264-0-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/2264-1-0x00000000005B0000-0x00000000005B6000-memory.dmp

    Filesize

    24KB

  • memory/2264-7-0x00000000005E0000-0x00000000005E6000-memory.dmp

    Filesize

    24KB

  • memory/2264-9-0x00000000005B0000-0x00000000005B6000-memory.dmp

    Filesize

    24KB

  • memory/2264-17-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/4016-18-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/4016-20-0x00000000006A0000-0x00000000006A6000-memory.dmp

    Filesize

    24KB

  • memory/4016-26-0x0000000000680000-0x0000000000686000-memory.dmp

    Filesize

    24KB

  • memory/4016-49-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB