Analysis

  • max time kernel
    149s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240426-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
  • submitted
    25/05/2024, 02:36

General

  • Target

    2024-05-25_408adf8e8566165abcfcd59f30c783f8_cryptolocker.exe

  • Size

    72KB

  • MD5

    408adf8e8566165abcfcd59f30c783f8

  • SHA1

    4ca53be33c2ebfa9d7e53cd7eca3ee93a45d383c

  • SHA256

    c66fc75bafb3709649feeeca00e834ca70d767343f9e97dbd6c699779741a7bd

  • SHA512

    8871fe779f7ae1276295a5ff3cbf72eb48fb778b69f15061b2239249cf8216ac592fce35b51533208b255967391ddce4016c521af26fde7d818596113374fe79

  • SSDEEP

    768:vQz7yVEhs9+js1SQtOOtEvwDpjz9+4ZPsED3VK2+ZtyOjgO4r9vFAg2rq2g1B/RR:vj+jsMQMOtEvwDpj5HZYTjipvF24p

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\2024-05-25_408adf8e8566165abcfcd59f30c783f8_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-25_408adf8e8566165abcfcd59f30c783f8_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:1280
    • 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:5104

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

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

          Filesize

          72KB

          MD5

          70e2cfd3a183ce2b2ebf8e50233937a2

          SHA1

          10e9fa33bcce1eb9058e667a66f5c05f005690a1

          SHA256

          19f9b05806470d44f50210df24324f973eb9c3a5457c4a220a57761bee715b3e

          SHA512

          8d60153384ad337ed24ad11a48f03dd9082bf01293b89bf275a00414f7d2aa6f3fc72d2ffc293e99201147d2afce9f8c0f1198c8aaa7fe4969db19a5e5094e9a

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

          Filesize

          315B

          MD5

          a34ac19f4afae63adc5d2f7bc970c07f

          SHA1

          a82190fc530c265aa40a045c21770d967f4767b8

          SHA256

          d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

          SHA512

          42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

        • memory/1280-0-0x00000000004D0000-0x00000000004D6000-memory.dmp

          Filesize

          24KB

        • memory/1280-1-0x00000000004F0000-0x00000000004F6000-memory.dmp

          Filesize

          24KB

        • memory/1280-8-0x00000000004D0000-0x00000000004D6000-memory.dmp

          Filesize

          24KB

        • memory/5104-17-0x0000000000660000-0x0000000000666000-memory.dmp

          Filesize

          24KB

        • memory/5104-23-0x00000000004E0000-0x00000000004E6000-memory.dmp

          Filesize

          24KB