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Analysis

  • max time kernel
    148s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240426-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
  • submitted
    11/05/2024, 14:34

General

  • Target

    2024-05-11_f4c6732e6082f572e97d548403f578d7_cryptolocker.exe

  • Size

    88KB

  • MD5

    f4c6732e6082f572e97d548403f578d7

  • SHA1

    8200660db4677ac3e2e3b84a73301cc4818d2697

  • SHA256

    49d0edb6a97b487d8c68bff3e6d02ecd001cc3f6372ed4b431ac32be408947d3

  • SHA512

    3fa3d32f43f7a669391eb2b184ad5cb68e55cc808e2f4d47e033d8f76433b5caff012ac6ea3b1f3c80a9dcf86cc540139dcf60659e0f180af64e4c9aea93e9f2

  • SSDEEP

    1536:qkmnpomddpMOtEvwDpjJGYQbN/PKwMgQq:AnBdOOtEvwDpj6zl

Score
9/10
upx

Malware Config

Signatures

  • Detection of CryptoLocker Variants 5 IoCs
  • Detection of Cryptolocker Samples 5 IoCs
  • UPX dump on OEP (original entry point) 5 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Executes dropped EXE 1 IoCs
  • UPX packed file 5 IoCs

    Detects executables packed with UPX/modified UPX open source packer.

  • 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\2024-05-11_f4c6732e6082f572e97d548403f578d7_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-11_f4c6732e6082f572e97d548403f578d7_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4912
    • C:\Users\Admin\AppData\Local\Temp\asih.exe
      "C:\Users\Admin\AppData\Local\Temp\asih.exe"
      2⤵
      • Executes dropped EXE
      PID:3572

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    88KB

    MD5

    2fb72ff6a08ea09a675927f2e86ed618

    SHA1

    73ee16bc9915469cbb4b1c91febd749b2282bbf6

    SHA256

    2017fbd7e0db584a0d0bd5c4ed6f56fcd610e30d4e6840f285c40d75ad42e44f

    SHA512

    1f2b62c5383ad50c3f7f2f326c2d9b2d8a34db472634468d86ef0031c9e1c21ad90e06bac89594f30f83111f1136cb3aeee590944f52775088021c971fb9bca7

  • memory/3572-16-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB

  • memory/3572-20-0x0000000002070000-0x0000000002076000-memory.dmp

    Filesize

    24KB

  • memory/3572-26-0x00000000006B0000-0x00000000006B6000-memory.dmp

    Filesize

    24KB

  • memory/3572-27-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB

  • memory/4912-0-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB

  • memory/4912-1-0x0000000000630000-0x0000000000636000-memory.dmp

    Filesize

    24KB

  • memory/4912-9-0x0000000000630000-0x0000000000636000-memory.dmp

    Filesize

    24KB

  • memory/4912-2-0x0000000000760000-0x0000000000766000-memory.dmp

    Filesize

    24KB

  • memory/4912-18-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB