Analysis

  • max time kernel
    136s
  • max time network
    129s
  • platform
    windows10_x64
  • resource
    win10v200430
  • submitted
    07-05-2020 13:29

General

  • Target

    buer.exe

  • Size

    111KB

  • MD5

    f884618092b55e3edc48096757aab143

  • SHA1

    0c0ad1301fc561699dba22cc779decc0df5570a1

  • SHA256

    6728db086194c2fa6a8e17e7b13bac1f5329b501e6f93b3587416895d387d343

  • SHA512

    195f4995907e34867d72778fb7e5857ea16e802376cf7ef17e2af3afa64e929bacfed4ed1b60d71a1ad8ea29e47c795c97ee7e41b6a02db59c9cc68fbb32e6ad

Score
7/10

Malware Config

Signatures

  • Loads dropped DLL 1 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

  • Suspicious behavior: MapViewOfSection 1 IoCs
  • Suspicious use of WriteProcessMemory 4 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\buer.exe
    "C:\Users\Admin\AppData\Local\Temp\buer.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of SetThreadContext
    • Suspicious behavior: MapViewOfSection
    • Suspicious use of WriteProcessMemory
    PID:3848
    • C:\Users\Admin\AppData\Local\Temp\buer.exe
      "C:\Users\Admin\AppData\Local\Temp\buer.exe"
      2⤵
        PID:1524

    Network

    MITRE ATT&CK Enterprise v6

    Replay Monitor

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    Downloads

    • \Users\Admin\AppData\Local\Temp\nsxE9EE.tmp\System.dll

      MD5

      0063d48afe5a0cdc02833145667b6641

      SHA1

      e7eb614805d183ecb1127c62decb1a6be1b4f7a8

      SHA256

      ac9dfe3b35ea4b8932536ed7406c29a432976b685cc5322f94ef93df920fede7

      SHA512

      71cbbcaeb345e09306e368717ea0503fe8df485be2e95200febc61bcd8ba74fb4211cd263c232f148c0123f6c6f2e3fd4ea20bdecc4070f5208c35c6920240f0