Analysis

  • max time kernel
    150s
  • max time network
    148s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220812-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
  • submitted
    21/01/2023, 23:25

General

  • Target
    file.exe
  • Size 195KB
  • Sample230121-3d9hrsed46
  • SHA256 cba622cccb196f9afafd53eca46ff2e0dcc123d9725ed0b07168e7cffd8961b7
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Signatures

  • Detects Smokeloader packer 1 IoCs
  • SmokeLoader

    Modular backdoor trojan in use since 2014.

  • Blocklisted process makes network request 2 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 24 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 43 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:644
  • C:\Users\Admin\AppData\Local\Temp\DB70.exe
    C:\Users\Admin\AppData\Local\Temp\DB70.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of WriteProcessMemory
    PID:2348
    • C:\Windows\SysWOW64\rundll32.exe
      C:\Windows\system32\rundll32.exe C:\Users\Admin\AppData\Local\Temp\Athusdiuuhasd.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:1968
      • C:\Windows\system32\rundll32.exe
        "C:\Windows\system32\rundll32.exe" "C:\Windows\system32\shell32.dll",#61 22613
        3⤵
        • Modifies registry class
        • Suspicious use of FindShellTrayWindow
        PID:2156
      • C:\Windows\SysWOW64\schtasks.exe
        schtasks /End /tn \Microsoft\Windows\Wininet\CacheTask
        3⤵
          PID:728
        • C:\Windows\SysWOW64\schtasks.exe
          schtasks /Run /tn \Microsoft\Windows\Wininet\CacheTask
          3⤵
            PID:1076
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 2348 -s 484
          2⤵
          • Program crash
          PID:4516
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 2348 -ip 2348
        1⤵
          PID:3412
        • C:\Windows\System32\rundll32.exe
          C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
          1⤵
            PID:1520

          Network

                MITRE ATT&CK Enterprise v6

                Replay Monitor

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                Downloads

                Athusdiuuhasd.dll

                • Path C:\Users\Admin\AppData\Local\Temp\Athusdiuuhasd.dll
                • Size 4.4MB
                • SHA256 4e4e51b2a058af1a686644f4f0f8b156192c5cd4a32370d25cb95da0f15357ba
                • MD5 SHA1 SHA512 SSDEEP

                Athusdiuuhasd.dll

                • Path C:\Users\Admin\AppData\Local\Temp\Athusdiuuhasd.dll
                • Size 4.4MB
                • SHA256 4e4e51b2a058af1a686644f4f0f8b156192c5cd4a32370d25cb95da0f15357ba
                • MD5 SHA1 SHA512 SSDEEP

                Athusdiuuhasd.dll

                • Path C:\Users\Admin\AppData\Local\Temp\Athusdiuuhasd.dll
                • Size 4.4MB
                • SHA256 4e4e51b2a058af1a686644f4f0f8b156192c5cd4a32370d25cb95da0f15357ba
                • MD5 SHA1 SHA512 SSDEEP

                DB70.exe

                • Path C:\Users\Admin\AppData\Local\Temp\DB70.exe
                • Size 3.7MB
                • SHA256 c9d735fdc3057722ab627a516bd5138df88e2c777006903a4ae17b4bdab8b25f
                • MD5 SHA1 SHA512 SSDEEP

                DB70.exe

                • Path C:\Users\Admin\AppData\Local\Temp\DB70.exe
                • Size 3.7MB
                • SHA256 c9d735fdc3057722ab627a516bd5138df88e2c777006903a4ae17b4bdab8b25f
                • MD5 SHA1 SHA512 SSDEEP

                memory/644-133-0x00000000048D0000-0x00000000048D9000-memory.dmp

                memory/644-134-0x0000000000400000-0x0000000002B9B000-memory.dmp

                memory/644-135-0x0000000000400000-0x0000000002B9B000-memory.dmp

                memory/644-132-0x0000000002E00000-0x0000000002E13000-memory.dmp

                memory/1968-159-0x0000000004280000-0x00000000043C0000-memory.dmp

                memory/1968-156-0x0000000004C30000-0x0000000004D70000-memory.dmp

                memory/1968-170-0x0000000004CF6000-0x0000000004CF8000-memory.dmp

                memory/1968-147-0x00000000026C0000-0x0000000002B2E000-memory.dmp

                memory/1968-167-0x0000000003660000-0x00000000041BA000-memory.dmp

                memory/1968-148-0x00000000026C0000-0x0000000002B2E000-memory.dmp

                memory/1968-161-0x0000000004CF6000-0x0000000004CF8000-memory.dmp

                memory/1968-150-0x00000000026C0000-0x0000000002B2E000-memory.dmp

                memory/1968-151-0x0000000003660000-0x00000000041BA000-memory.dmp

                memory/1968-152-0x0000000003660000-0x00000000041BA000-memory.dmp

                memory/1968-153-0x0000000003660000-0x00000000041BA000-memory.dmp

                memory/1968-154-0x0000000004280000-0x00000000043C0000-memory.dmp

                memory/1968-155-0x0000000004280000-0x00000000043C0000-memory.dmp

                memory/1968-157-0x0000000004280000-0x00000000043C0000-memory.dmp

                memory/1968-158-0x0000000004280000-0x00000000043C0000-memory.dmp

                memory/2156-162-0x000001E0B89A0000-0x000001E0B8AE0000-memory.dmp

                memory/2156-164-0x000001E0B89A0000-0x000001E0B8AE0000-memory.dmp

                memory/2156-163-0x000001E0B70E0000-0x000001E0B7383000-memory.dmp

                memory/2156-165-0x0000000000BA0000-0x0000000000E31000-memory.dmp

                memory/2156-166-0x000001E0B70E0000-0x000001E0B7383000-memory.dmp

                memory/2348-140-0x0000000004FD0000-0x00000000054C0000-memory.dmp

                memory/2348-149-0x0000000000400000-0x0000000002F19000-memory.dmp

                memory/2348-141-0x0000000000400000-0x0000000002F19000-memory.dmp

                memory/2348-139-0x0000000004C36000-0x0000000004FC7000-memory.dmp

                memory/2348-142-0x0000000004C36000-0x0000000004FC7000-memory.dmp