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Analysis

  • max time kernel
    150s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240419-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system
  • submitted
    01/05/2024, 12:34

General

  • Target

    2024-05-01_6a3c9cf37807f1b8022691ee853e99e3_cryptolocker.exe

  • Size

    43KB

  • MD5

    6a3c9cf37807f1b8022691ee853e99e3

  • SHA1

    e4ca30f6f0d4e4d42a15f6532b8027805e344326

  • SHA256

    aadba286df38c1db19116df6677e873005ebb21c24241b7a8fc34d589fe1d00a

  • SHA512

    1d4d92f4e955f8326f01bc5d2b17aa9ba7faee9f927e7c99a8967793bdfb33fd8400f15e006e04a9dc2ba62ee4c87c2d2e5288eb8841dd89092e007b04adb19b

  • SSDEEP

    768:b/yC4GyNM01GuQMNXw2PSjHPbSuYlW8PAJ:b/pYayGig5HjS3NPAJ

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\2024-05-01_6a3c9cf37807f1b8022691ee853e99e3_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-01_6a3c9cf37807f1b8022691ee853e99e3_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:3740
    • C:\Users\Admin\AppData\Local\Temp\retln.exe
      "C:\Users\Admin\AppData\Local\Temp\retln.exe"
      2⤵
      • Executes dropped EXE
      PID:2444

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    43KB

    MD5

    221a2d98824fba31a570b2ed58099ead

    SHA1

    ed8cedf9fa7749172d6883496ed2d481d611cf7a

    SHA256

    849239ff50df4d3eee62c72357be5a4e9c56d896e0079a77fad4eb5fc8517507

    SHA512

    265ccfc076a82bb53d38607b1469f52c0f62a6963c3cf3388b258b3b52797bba7ba998d86a31a637be298d7e370500552c8122d125dabf538957541efc868162

  • memory/2444-25-0x00000000006F0000-0x00000000006F6000-memory.dmp

    Filesize

    24KB

  • memory/3740-0-0x0000000000600000-0x0000000000606000-memory.dmp

    Filesize

    24KB

  • memory/3740-1-0x0000000000400000-0x0000000000406000-memory.dmp

    Filesize

    24KB

  • memory/3740-8-0x0000000000600000-0x0000000000606000-memory.dmp

    Filesize

    24KB