Analysis

  • max time kernel
    150s
  • max time network
    154s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231222-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system
  • submitted
    18/01/2024, 22:36

General

  • Target

    2024-01-18_3131a22eded390f24e2710bc0235f3ad_cryptolocker.exe

  • Size

    120KB

  • MD5

    3131a22eded390f24e2710bc0235f3ad

  • SHA1

    5a06fa8de94bde9cd419e7fe4ca4ccce6914ea57

  • SHA256

    bd5a80f9cfe737fbb3eb293f4ba0940c499a7601433ab63299a58902a9dacf51

  • SHA512

    d02f19992ae1f2137e123d8c19a64b324798cce4990ca28f86f9ae21c0244db9230084800fad8149b8349be64d6a42c8ac06a22fe8d27b87e4cd6b573442df9a

  • SSDEEP

    768:gUQz7yVEhs9+4T/1bytOOtEvwDpjNbZ7uyA36S7MpxRIIXVe3mU9TYwlOBTKY:gUj+AIMOtEvwDpjNbwQEIPlemUhYaY

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 1 IoCs
  • Detection of Cryptolocker Samples 1 IoCs
  • Checks computer location settings 2 TTPs 2 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).

  • Modifies system certificate store 2 TTPs 8 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-01-18_3131a22eded390f24e2710bc0235f3ad_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-01-18_3131a22eded390f24e2710bc0235f3ad_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:2768
    • C:\Users\Admin\AppData\Local\Temp\misid.exe
      "C:\Users\Admin\AppData\Local\Temp\misid.exe"
      2⤵
      • Checks computer location settings
      • Executes dropped EXE
      • Modifies system certificate store
      PID:1288

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

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

          Filesize

          121KB

          MD5

          e26027bb4c807d6613c9361ec9efa72e

          SHA1

          2cead0423fbbaef28482971c7404cda73fce1678

          SHA256

          f5d17fd77c8cfaf502f2f3f8fe766d9209fe849fd8005aa5d22d6175a0ea15a2

          SHA512

          1797028a7ee2e5810315839966711825c1cd7ccab356d782c872ccefe043dfd4a908160a1c995529c5cb6bf4832f9a951f0e1afdb38413fee6f23a47f9965ac1

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

          Filesize

          315B

          MD5

          a34ac19f4afae63adc5d2f7bc970c07f

          SHA1

          a82190fc530c265aa40a045c21770d967f4767b8

          SHA256

          d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

          SHA512

          42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

        • memory/1288-17-0x00000000005E0000-0x00000000005E6000-memory.dmp

          Filesize

          24KB

        • memory/1288-20-0x00000000005C0000-0x00000000005C6000-memory.dmp

          Filesize

          24KB

        • memory/2768-0-0x00000000006A0000-0x00000000006A6000-memory.dmp

          Filesize

          24KB

        • memory/2768-1-0x00000000006A0000-0x00000000006A6000-memory.dmp

          Filesize

          24KB

        • memory/2768-2-0x0000000000850000-0x0000000000856000-memory.dmp

          Filesize

          24KB