Analysis

  • max time kernel
    94s
  • max time network
    126s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240426-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
  • submitted
    06-06-2024 19:59

General

  • Target

    2024-06-06_91cf5b2c40f9b82584bda0b57bb5d83d_cryptolocker.exe

  • Size

    62KB

  • MD5

    91cf5b2c40f9b82584bda0b57bb5d83d

  • SHA1

    67fa061062191ebfc91e599ba70f88ec3d6f0cae

  • SHA256

    7c29a6cfa27534225e95f2b3914a210ba1bb5c694fd289a66973c8214a83c64d

  • SHA512

    5be084a026b81f17f4b38ace7621f710bfe0930687ec511ea0d4c48c26fd3f8cc82ad4fa749a64398ec685a26b1fdd44262dbb7d3007789ca4ffb092edde6a50

  • SSDEEP

    768:0Qz7yVEhs9+syJP6ntOOtEvwDpjFSXOQ69zbjlAAX5e9zz:0j+soPSMOtEvwDpjwizbR9Xwzz

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\2024-06-06_91cf5b2c40f9b82584bda0b57bb5d83d_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-06-06_91cf5b2c40f9b82584bda0b57bb5d83d_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:1440
    • 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:3460

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    63KB

    MD5

    4281cc194c3e3b0adebdb63dda4dfba1

    SHA1

    42238773bc3ac76d0bd59f4504a5b825d714c944

    SHA256

    283c7993ca3bd5dbd96bd04db88d88c85b3affaa41b3f52d5871537c917fcef8

    SHA512

    a759b11420f4271d63622df233b953b06dc868506721ed9bb1d1e9566952e9b063cf4900f7af172804d26c2dc147638dc472d7ba1be3116479b890b468d34a50

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/1440-0-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/1440-1-0x00000000021C0000-0x00000000021C6000-memory.dmp

    Filesize

    24KB

  • memory/1440-2-0x00000000020E0000-0x00000000020E6000-memory.dmp

    Filesize

    24KB

  • memory/1440-9-0x00000000021C0000-0x00000000021C6000-memory.dmp

    Filesize

    24KB

  • memory/1440-17-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/3460-26-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/3460-20-0x00000000004F0000-0x00000000004F6000-memory.dmp

    Filesize

    24KB

  • memory/3460-19-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/3460-49-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB