Analysis

  • max time kernel
    148s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240220-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240220-enlocale:en-usos:windows10-2004-x64system
  • submitted
    20-02-2024 12:28

General

  • Target

    2024-02-20_3a35ca6204e6d8cfe6c9e62b78aafd65_cryptolocker.exe

  • Size

    53KB

  • MD5

    3a35ca6204e6d8cfe6c9e62b78aafd65

  • SHA1

    eafc5b2e8625c69a5b43798da4fad0eff7e95571

  • SHA256

    f6cab8bf30f9870fbf8b1a9a83ac4ed84839cd445d682a9151664f3e83a0f97b

  • SHA512

    52c81623a2ab7119c725a9674e8864d081816db38913522fdeb2898988bf6f2df8ca02231cdaef7df01bb7cf92fb8c9e0763ce360ff16abbf93130740d174b7e

  • SSDEEP

    768:79inqyNR/QtOOtEvwDpjBK/iVTab3GRuv3VylSV/CCjgA:79mqyNhQMOtEvwDpjBPY7xv3g8OA

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 4 IoCs
  • Detection of Cryptolocker Samples 4 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\2024-02-20_3a35ca6204e6d8cfe6c9e62b78aafd65_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-02-20_3a35ca6204e6d8cfe6c9e62b78aafd65_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:2484
    • C:\Users\Admin\AppData\Local\Temp\asih.exe
      "C:\Users\Admin\AppData\Local\Temp\asih.exe"
      2⤵
      • Executes dropped EXE
      PID:5052

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    53KB

    MD5

    c766763d71d5e1e9cbccfcae2aea6595

    SHA1

    c44ff82f0fe391d2a3ab70e8af72ee8923f6556a

    SHA256

    9b9b1cdd6d235a9475ad7608241a1cf31f40b43227daa872f7214ce463b1bd96

    SHA512

    9e21b6f21b59dbb46f80c95cdfff0f73ef4de6a85bc65bbaf12d7db855db45109361f8fc803a363da38ba748fca5057593c2826fdc8f55633417065663ac9d3c

  • memory/2484-0-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB

  • memory/2484-1-0x0000000000610000-0x0000000000616000-memory.dmp

    Filesize

    24KB

  • memory/2484-2-0x0000000000610000-0x0000000000616000-memory.dmp

    Filesize

    24KB

  • memory/2484-3-0x0000000000640000-0x0000000000646000-memory.dmp

    Filesize

    24KB

  • memory/2484-17-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB

  • memory/5052-18-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB

  • memory/5052-20-0x0000000000650000-0x0000000000656000-memory.dmp

    Filesize

    24KB

  • memory/5052-22-0x0000000000630000-0x0000000000636000-memory.dmp

    Filesize

    24KB