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Analysis

  • max time kernel
    151s
  • max time network
    157s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    13/03/2024, 05:44

General

  • Target

    2024-03-13_764ab904f255437dabe01483f3f19a8f_cryptolocker.exe

  • Size

    32KB

  • MD5

    764ab904f255437dabe01483f3f19a8f

  • SHA1

    2c504a630343588555c17ce6c25785d4d0d19145

  • SHA256

    6712a9b7478e868be0dee4d8cb166694db0213885d2804b170da14cfe3ca4910

  • SHA512

    fd803204e390b8def54a33f1cf7325a840cea394c39fddc936e001144334fc3e75920ea9da965cc12799fc9365fe9a358356c768a5e0846c9ebf4d6e7b0d6765

  • SSDEEP

    384:bM7Q0pjC4GybxMv01d3AcASBQMf6i/zzzcYgUPSznUsso+:b/yC4GyNM01GuQMNXw2PSjWo+

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\2024-03-13_764ab904f255437dabe01483f3f19a8f_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-03-13_764ab904f255437dabe01483f3f19a8f_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:2512
    • C:\Users\Admin\AppData\Local\Temp\retln.exe
      "C:\Users\Admin\AppData\Local\Temp\retln.exe"
      2⤵
      • Executes dropped EXE
      PID:8

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    32KB

    MD5

    43e865cd98b27924189eb5e1cfab2a6b

    SHA1

    9b0f405acbed9dc854ad810f08526f94fb7083c7

    SHA256

    79beb3a7fdde290a0ec43bbc5ad5f7976863efeec1730880795b4e6404fa424d

    SHA512

    08fe3da7bf73a4f4134c1018aa19422666431e6fd867fe65eb6dc67272ff3a6c09497dede6760bfac3952485a0f63c75410c9f65295dbe2dc47586a62b92d45c

  • memory/8-20-0x0000000002160000-0x0000000002166000-memory.dmp

    Filesize

    24KB

  • memory/2512-0-0x0000000002EA0000-0x0000000002EA6000-memory.dmp

    Filesize

    24KB

  • memory/2512-1-0x0000000002EA0000-0x0000000002EA6000-memory.dmp

    Filesize

    24KB

  • memory/2512-2-0x0000000000400000-0x0000000000406000-memory.dmp

    Filesize

    24KB