Analysis

  • max time kernel
    150s
  • max time network
    153s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240221-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240221-enlocale:en-usos:windows10-2004-x64system
  • submitted
    22/02/2024, 17:38

General

  • Target

    2024-02-22_5b3f14eadc9ee8eacdf50f2b4ed39e1d_cryptolocker.exe

  • Size

    31KB

  • MD5

    5b3f14eadc9ee8eacdf50f2b4ed39e1d

  • SHA1

    c791bfa73b31650d249feb6672e85083b74b972b

  • SHA256

    e689e0dd3483f5cec614632fe93788fbde40d9b5f92020162f15e5f2854f30ad

  • SHA512

    8442fbda0557183e1d9fa6220c260ab4cb49a5d3c5aef7285fad9639a8f81a2fdb1e087aa6e9eb5d65f3bd28873ae46527a81a8d193ca32c82f085071246c613

  • SSDEEP

    384:bM7Q0pjC4GybxMv01d3AcASBQMf6i/zzzcYgUPSznUssoT:b/yC4GyNM01GuQMNXw2PSjWoT

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 1 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Executes dropped EXE 1 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-02-22_5b3f14eadc9ee8eacdf50f2b4ed39e1d_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-02-22_5b3f14eadc9ee8eacdf50f2b4ed39e1d_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:1596
    • C:\Users\Admin\AppData\Local\Temp\retln.exe
      "C:\Users\Admin\AppData\Local\Temp\retln.exe"
      2⤵
      • Executes dropped EXE
      PID:4980

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

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

          Filesize

          31KB

          MD5

          6b2cebbda46f03e28edcc28c4d0e3e12

          SHA1

          1cc9c621b828608cdc4d68aab3d933dc48664a9a

          SHA256

          4620177060892eb70ca96513e1749d0a1e145a4359db5a04fd08aaf21e29c5be

          SHA512

          c752ca421c7793029a77fe93c171110366c73672c33e1147c81cf084bed58b598adfe7feb057bcaf286a868ab989184010e775b4c38f1d4871b334cf27f61b3e

        • memory/1596-0-0x0000000002260000-0x0000000002266000-memory.dmp

          Filesize

          24KB

        • memory/1596-1-0x0000000002260000-0x0000000002266000-memory.dmp

          Filesize

          24KB

        • memory/1596-2-0x0000000000400000-0x0000000000406000-memory.dmp

          Filesize

          24KB

        • memory/4980-20-0x0000000002D60000-0x0000000002D66000-memory.dmp

          Filesize

          24KB