Analysis

  • max time kernel
    183s
  • max time network
    193s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240221-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240221-enlocale:en-usos:windows10-2004-x64system
  • submitted
    24/02/2024, 11:32

General

  • Target

    2024-02-24_2719975fbe1e4e70e709d384341c1db1_cryptolocker.exe

  • Size

    45KB

  • MD5

    2719975fbe1e4e70e709d384341c1db1

  • SHA1

    bd58a5e726fa50c99dbc81107ca45facb4391400

  • SHA256

    85ac581d7f8494bce51b5f5649f479dcd29f59173e04c6281511f1f1dde23d47

  • SHA512

    9e4d8c3bd08bb176c59c42ba32b39f7604caf3605131dedad7dff7c3ba732a550b5f7e8db00488efd75faaa4737fe0b75b46462ff759ce0d7d5e53483d760b82

  • SSDEEP

    768:qmOKYQDf5XdrDmjr5tOOtEvwDpjAajFEitQbDmoSQCVUBJUkQqAHBIG05W2MomzF:qmbhXDmjr5MOtEvwDpj5cDtKkQZQqF

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 4 IoCs
  • Detection of Cryptolocker Samples 2 IoCs
  • UPX dump on OEP (original entry point) 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\2024-02-24_2719975fbe1e4e70e709d384341c1db1_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-02-24_2719975fbe1e4e70e709d384341c1db1_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4448
    • C:\Users\Admin\AppData\Local\Temp\asih.exe
      "C:\Users\Admin\AppData\Local\Temp\asih.exe"
      2⤵
      • Executes dropped EXE
      PID:1820

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

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

          Filesize

          46KB

          MD5

          e731152036e0c4a5d89683b44dc3dc44

          SHA1

          65cae42e377ee8160e407feb5b71e88c392b0721

          SHA256

          5089bfc2e966819b01f5e449df57a8caf33d8ef728478c68688755b5efe5ba22

          SHA512

          077603ebab3c06c5d6afdba68c919d1ea7dcc2f7efbab019b5d2c560420ccf2a2b5fa5c50c639d897f35b83e03ad8816f184f162a7b33100d7c58201e76df9c6

        • memory/1820-19-0x00000000004F0000-0x00000000004F6000-memory.dmp

          Filesize

          24KB

        • memory/1820-21-0x00000000004D0000-0x00000000004D6000-memory.dmp

          Filesize

          24KB

        • memory/1820-26-0x0000000000500000-0x0000000000510000-memory.dmp

          Filesize

          64KB

        • memory/4448-0-0x0000000000500000-0x0000000000510000-memory.dmp

          Filesize

          64KB

        • memory/4448-1-0x00000000005A0000-0x00000000005A6000-memory.dmp

          Filesize

          24KB

        • memory/4448-2-0x00000000005A0000-0x00000000005A6000-memory.dmp

          Filesize

          24KB

        • memory/4448-3-0x00000000005D0000-0x00000000005D6000-memory.dmp

          Filesize

          24KB

        • memory/4448-16-0x0000000000500000-0x0000000000510000-memory.dmp

          Filesize

          64KB