Analysis

  • max time kernel
    152s
  • max time network
    158s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    07/03/2024, 00:42

General

  • Target

    2024-03-07_10e58ceaa9a5e5b63ff3c93a7be9ce97_cryptolocker.exe

  • Size

    46KB

  • MD5

    10e58ceaa9a5e5b63ff3c93a7be9ce97

  • SHA1

    e4b3ea3eefb6e54f9b7a4fb875eb1331f992c7c6

  • SHA256

    2bfee29753786dae21870005912f24cdf8f2d221bc58cfb6b49e6649a7603d0a

  • SHA512

    713267abd4146bc121d08d4b090f6d27daacdb357ec5efd86c170a69ae722c1a45d6806845a6b1b7b4e8e0cb35e0f5c8ea1884ef794b3bc5591b16d6dad7a36b

  • SSDEEP

    768:qmOKYQDf5XdrDmjr5tOOtEvwDpjAajFEitQbDmoSQCVUBJUkQqAHBIG05W2MobeU:qmbhXDmjr5MOtEvwDpj5cDtKkQZQt

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\2024-03-07_10e58ceaa9a5e5b63ff3c93a7be9ce97_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-03-07_10e58ceaa9a5e5b63ff3c93a7be9ce97_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:1552
    • C:\Users\Admin\AppData\Local\Temp\asih.exe
      "C:\Users\Admin\AppData\Local\Temp\asih.exe"
      2⤵
      • Executes dropped EXE
      PID:1264

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

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

          Filesize

          47KB

          MD5

          0f51b7f0d182550ba681aefd57cd56d3

          SHA1

          7b59922c2fe22bbe705a5d1aba6273fd09522a69

          SHA256

          e2325f9dd9adcaa4af4d6623e366ec3045418ed760b73ad8efcb9f1545f4ddc6

          SHA512

          4454d0597b7c84685d7667d58b35386e620655aec006729cfaf110e497a6bcb425f91fa8fdd1695aff74d0badfd001e1dc02580835d18d00ef111510dcd04ac9

        • memory/1264-19-0x00000000007D0000-0x00000000007D6000-memory.dmp

          Filesize

          24KB

        • memory/1264-21-0x0000000000660000-0x0000000000666000-memory.dmp

          Filesize

          24KB

        • memory/1264-26-0x0000000000500000-0x0000000000510000-memory.dmp

          Filesize

          64KB

        • memory/1552-0-0x0000000000500000-0x0000000000510000-memory.dmp

          Filesize

          64KB

        • memory/1552-1-0x0000000002060000-0x0000000002066000-memory.dmp

          Filesize

          24KB

        • memory/1552-2-0x0000000002060000-0x0000000002066000-memory.dmp

          Filesize

          24KB

        • memory/1552-3-0x0000000002080000-0x0000000002086000-memory.dmp

          Filesize

          24KB

        • memory/1552-17-0x0000000000500000-0x0000000000510000-memory.dmp

          Filesize

          64KB