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Analysis

  • max time kernel
    150s
  • max time network
    152s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    05/04/2024, 03:24

General

  • Target

    2024-04-05_002b8f06e3a17fe2e11c8f4a98b519b9_cryptolocker.exe

  • Size

    33KB

  • MD5

    002b8f06e3a17fe2e11c8f4a98b519b9

  • SHA1

    588a0dd8e589db6e4747063b9203f52c82bec6bf

  • SHA256

    454ece330cc86117b460bacba94aa486423960fede869170443aa2ac10728449

  • SHA512

    865ad6e706219888ae1c441bff36d8425d3f4cbf1ebbc19bb5cc97b3a9180b6c3f3d605900ea692867b524b45327ea00afa65d0ba449f8981b30dd4ab7637ff6

  • SSDEEP

    384:bM7Q0pjC4GybxMv01d3AcASBQMf6i/zzzcYgUPSznUsD5h5:b/yC4GyNM01GuQMNXw2PSjZ/5

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\2024-04-05_002b8f06e3a17fe2e11c8f4a98b519b9_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-04-05_002b8f06e3a17fe2e11c8f4a98b519b9_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:3228
    • C:\Users\Admin\AppData\Local\Temp\retln.exe
      "C:\Users\Admin\AppData\Local\Temp\retln.exe"
      2⤵
      • Executes dropped EXE
      PID:2868

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    33KB

    MD5

    14e8b6719e2894aebb6d9b79063d4c9c

    SHA1

    c6100979e848bf0d81825d067362840c6bf41832

    SHA256

    7a8197fa94e0ecc2af3ef4b2bf80dcef6cfc1b1da333df6608058e730aec8e24

    SHA512

    7604cbeb0c6afc8170f228d465ee7a72d2eb416c608f2e971bcba3dc035b562c93b09ab99a124bc51c600143ba7e1c9a3fa0e6b22fc3535300ea2e78718c52b7

  • memory/2868-20-0x0000000002EA0000-0x0000000002EA6000-memory.dmp

    Filesize

    24KB

  • memory/3228-0-0x0000000002250000-0x0000000002256000-memory.dmp

    Filesize

    24KB

  • memory/3228-1-0x0000000002250000-0x0000000002256000-memory.dmp

    Filesize

    24KB

  • memory/3228-2-0x0000000000400000-0x0000000000406000-memory.dmp

    Filesize

    24KB