Analysis

  • max time kernel
    100s
  • max time network
    152s
  • platform
    windows10_x64
  • resource
    win10v20210408
  • submitted
    17/09/2021, 21:36

General

  • Target
    acd210a0d0b6d5b9ea2de9d144ac77b9caf10348.dll
  • Size 84KB
  • Sample210917-1fxkwagfa4
  • SHA256 754a35180c3545e644e82f3a075779f49e99ba7a525dd580e437f13a81efd2b5
  • MD5 SHA1 SHA512
Score
10/10

Malware Config

Signatures

  • BazarBackdoor

    Stealthy backdoor targeting corporate networks, believed to be developed by Trickbot's authors.

  • Bazar/Team9 Backdoor payload 3 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs

Processes

  • C:\Windows\system32\regsvr32.exe
    regsvr32 /s C:\Users\Admin\AppData\Local\Temp\acd210a0d0b6d5b9ea2de9d144ac77b9caf10348.dll
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:644
    • C:\Windows\system32\svchost.exe
      C:\Windows\system32\svchost.exe -k UnistackSvcGroup
      2⤵
        PID:2724
    • C:\Windows\System32\rundll32.exe
      C:\Windows\System32\rundll32.exe C:\Users\Admin\AppData\Local\Temp\acd210a0d0b6d5b9ea2de9d144ac77b9caf10348.dll,DllRegisterServer {9AE34F11-ACBC-40B5-846F-32DE4C3F568E}
      1⤵
        PID:2080

      Network

            MITRE ATT&CK Matrix

            Replay Monitor

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            Downloads

            memory/644-116-0x0000000002CF0000-0x0000000002D06000-memory.dmp

            memory/2080-119-0x000002049A500000-0x000002049A516000-memory.dmp

            memory/2724-120-0x00007FF7D1920000-0x00007FF7D196B000-memory.dmp

            memory/2724-122-0x00007FF7D1920000-0x00007FF7D196B000-memory.dmp