Analysis

  • max time kernel
    159s
  • max time network
    152s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220812-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
  • submitted
    30/11/2022, 12:44

General

  • Target
    file.exe
  • Size 185KB
  • Sample221130-pygrlabd46
  • SHA256 ce0602b9d096ff5329b1a90293ae49425626eefb7eba01b8ea7c95f2fe01d3d3
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Signatures

  • Detects Smokeloader packer 2 IoCs
  • SmokeLoader

    Modular backdoor trojan in use since 2014.

  • Blocklisted process makes network request 1 IoCs
  • Downloads MZ/PE file
  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 2 IoCs
  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs
  • Accesses Microsoft Outlook profiles 1 TTPs 4 IoCs
  • Checks installed software on the system 1 TTPs

    Looks up Uninstall key entries in the registry to enumerate software on the system.

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

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

  • Program crash 1 IoCs
  • Checks SCSI registry key(s) 3 TTPs 3 IoCs

    SCSI information is often read in order to detect sandboxing environments.

  • Checks processor information in registry 2 TTPs 23 IoCs

    Processor information is often read in order to detect sandboxing environments.

  • Modifies Internet Explorer settings 1 TTPs 4 IoCs
  • Modifies registry class 30 IoCs
  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious behavior: MapViewOfSection 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 25 IoCs
  • Suspicious use of FindShellTrayWindow 10 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 15 IoCs
  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\file.exe
    "C:\Users\Admin\AppData\Local\Temp\file.exe"
    1⤵
    • Checks SCSI registry key(s)
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious behavior: MapViewOfSection
    PID:4104
  • C:\Users\Admin\AppData\Local\Temp\214E.exe
    C:\Users\Admin\AppData\Local\Temp\214E.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of WriteProcessMemory
    PID:4732
    • C:\Windows\SysWOW64\rundll32.exe
      C:\Windows\system32\rundll32.exe C:\Users\Admin\AppData\Local\Temp\Serpodtudpwhhta.dll,start
      2⤵
      • Blocklisted process makes network request
      • Loads dropped DLL
      • Accesses Microsoft Outlook accounts
      • Accesses Microsoft Outlook profiles
      • Suspicious use of SetThreadContext
      • Checks processor information in registry
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of WriteProcessMemory
      • outlook_office_path
      • outlook_win_path
      PID:1256
      • C:\Windows\system32\rundll32.exe
        "C:\Windows\system32\rundll32.exe" "C:\Windows\system32\shell32.dll",#61 13723
        3⤵
        • Modifies registry class
        • Suspicious use of FindShellTrayWindow
        PID:428
      • C:\Windows\SysWOW64\schtasks.exe
        schtasks /End /tn \Microsoft\Windows\Wininet\CacheTask
        3⤵
          PID:840
        • C:\Windows\SysWOW64\schtasks.exe
          schtasks /Run /tn \Microsoft\Windows\Wininet\CacheTask
          3⤵
            PID:2344
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 4732 -s 484
          2⤵
          • Program crash
          PID:1152
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 476 -p 4732 -ip 4732
        1⤵
          PID:4348
        • C:\Windows\System32\rundll32.exe
          C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
          1⤵
            PID:5104

          Network

                MITRE ATT&CK Enterprise v6

                Replay Monitor

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                Downloads

                214E.exe

                • Path C:\Users\Admin\AppData\Local\Temp\214E.exe
                • Size 3.6MB
                • SHA256 d8fd6addb39d7cbded4026cec54657e0f4883266e2d3f8df6f10d3cdab15bd8c
                • MD5 SHA1 SHA512 SSDEEP

                214E.exe

                • Path C:\Users\Admin\AppData\Local\Temp\214E.exe
                • Size 3.6MB
                • SHA256 d8fd6addb39d7cbded4026cec54657e0f4883266e2d3f8df6f10d3cdab15bd8c
                • MD5 SHA1 SHA512 SSDEEP

                Serpodtudpwhhta.dll

                • Path C:\Users\Admin\AppData\Local\Temp\Serpodtudpwhhta.dll
                • Size 4.3MB
                • SHA256 05328d3b0251bbde5283670ad1619cabbe9f1908b380eec2fa847c3a125d61fa
                • MD5 SHA1 SHA512 SSDEEP

                Serpodtudpwhhta.dll

                • Path C:\Users\Admin\AppData\Local\Temp\Serpodtudpwhhta.dll
                • Size 4.3MB
                • SHA256 05328d3b0251bbde5283670ad1619cabbe9f1908b380eec2fa847c3a125d61fa
                • MD5 SHA1 SHA512 SSDEEP

                Serpodtudpwhhta.dll

                • Path C:\Users\Admin\AppData\Local\Temp\Serpodtudpwhhta.dll
                • Size 4.3MB
                • SHA256 05328d3b0251bbde5283670ad1619cabbe9f1908b380eec2fa847c3a125d61fa
                • MD5 SHA1 SHA512 SSDEEP

                memory/428-163-0x000001E7410D0000-0x000001E741210000-memory.dmp

                memory/428-165-0x0000000000390000-0x0000000000626000-memory.dmp

                memory/428-166-0x000001E73F680000-0x000001E73F928000-memory.dmp

                memory/428-164-0x000001E7410D0000-0x000001E741210000-memory.dmp

                memory/1256-148-0x0000000002270000-0x00000000026C7000-memory.dmp

                memory/1256-154-0x0000000003310000-0x0000000003E5D000-memory.dmp

                memory/1256-167-0x0000000003310000-0x0000000003E5D000-memory.dmp

                memory/1256-161-0x0000000003F20000-0x0000000004060000-memory.dmp

                memory/1256-160-0x0000000003F20000-0x0000000004060000-memory.dmp

                memory/1256-159-0x0000000004950000-0x0000000004A90000-memory.dmp

                memory/1256-149-0x0000000002270000-0x00000000026C7000-memory.dmp

                memory/1256-158-0x0000000003F20000-0x0000000004060000-memory.dmp

                memory/1256-157-0x0000000003F20000-0x0000000004060000-memory.dmp

                memory/1256-152-0x0000000002270000-0x00000000026C7000-memory.dmp

                memory/1256-153-0x0000000003310000-0x0000000003E5D000-memory.dmp

                memory/1256-155-0x0000000003310000-0x0000000003E5D000-memory.dmp

                memory/1256-156-0x0000000003F20000-0x0000000004060000-memory.dmp

                memory/4104-135-0x000000000050D000-0x000000000051D000-memory.dmp

                memory/4104-136-0x0000000002060000-0x0000000002069000-memory.dmp

                memory/4104-137-0x0000000000400000-0x0000000000464000-memory.dmp

                memory/4104-132-0x000000000050D000-0x000000000051D000-memory.dmp

                memory/4104-134-0x0000000000400000-0x0000000000464000-memory.dmp

                memory/4104-133-0x0000000002060000-0x0000000002069000-memory.dmp

                memory/4732-141-0x000000000261C000-0x00000000029A1000-memory.dmp

                memory/4732-151-0x0000000000400000-0x00000000008F2000-memory.dmp

                memory/4732-150-0x00000000029B0000-0x0000000002E95000-memory.dmp

                memory/4732-143-0x0000000000400000-0x00000000008F2000-memory.dmp

                memory/4732-142-0x00000000029B0000-0x0000000002E95000-memory.dmp