Analysis

  • max time kernel
    150s
  • max time network
    124s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220901-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system
  • submitted
    30/01/2023, 17:51

General

  • Target
    file.exe
  • Size 169KB
  • Sample230130-we54eabd63
  • SHA256 57c57303ab13a2a061006556dc2903e53af6eb3fca8a94b8b6561227ac615e41
  • 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 21 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 21 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:4016
  • C:\Users\Admin\AppData\Local\Temp\36FE.exe
    C:\Users\Admin\AppData\Local\Temp\36FE.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of WriteProcessMemory
    PID:4648
    • C:\Windows\SysWOW64\rundll32.exe
      C:\Windows\system32\rundll32.exe C:\Users\Admin\AppData\Local\Temp\Eorppuwwrieiyod.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:2824
      • C:\Windows\system32\rundll32.exe
        "C:\Windows\system32\rundll32.exe" "C:\Windows\system32\shell32.dll",#61 23777
        3⤵
        • Modifies registry class
        • Suspicious use of FindShellTrayWindow
        PID:1740
      • C:\Windows\SysWOW64\schtasks.exe
        schtasks /End /tn \Microsoft\Windows\Wininet\CacheTask
        3⤵
          PID:2596
        • C:\Windows\SysWOW64\schtasks.exe
          schtasks /Run /tn \Microsoft\Windows\Wininet\CacheTask
          3⤵
            PID:4592
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 4648 -s 400
          2⤵
          • Program crash
          PID:2120
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 432 -p 4648 -ip 4648
        1⤵
          PID:3592
        • C:\Windows\System32\rundll32.exe
          C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
          1⤵
            PID:3292

          Network

                MITRE ATT&CK Enterprise v6

                Replay Monitor

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                Downloads

                36FE.exe

                • Path C:\Users\Admin\AppData\Local\Temp\36FE.exe
                • Size 3.1MB
                • SHA256 0ab2a3d3b3c7b7b44fd3d1d3e19748224acc5f0543bd48ff73e82271736351d8
                • MD5 SHA1 SHA512 SSDEEP

                36FE.exe

                • Path C:\Users\Admin\AppData\Local\Temp\36FE.exe
                • Size 3.1MB
                • SHA256 0ab2a3d3b3c7b7b44fd3d1d3e19748224acc5f0543bd48ff73e82271736351d8
                • MD5 SHA1 SHA512 SSDEEP

                Eorppuwwrieiyod.dll

                • Path C:\Users\Admin\AppData\Local\Temp\Eorppuwwrieiyod.dll
                • Size 4.2MB
                • SHA256 daa0b567ee7a4275de80dece617042c63444b09c3144caf92c4ca0bd211162ec
                • MD5 SHA1 SHA512 SSDEEP

                Eorppuwwrieiyod.dll

                • Path C:\Users\Admin\AppData\Local\Temp\Eorppuwwrieiyod.dll
                • Size 4.2MB
                • SHA256 daa0b567ee7a4275de80dece617042c63444b09c3144caf92c4ca0bd211162ec
                • MD5 SHA1 SHA512 SSDEEP

                Eorppuwwrieiyod.dll

                • Path C:\Users\Admin\AppData\Local\Temp\Eorppuwwrieiyod.dll
                • Size 4.2MB
                • SHA256 daa0b567ee7a4275de80dece617042c63444b09c3144caf92c4ca0bd211162ec
                • MD5 SHA1 SHA512 SSDEEP

                memory/1740-161-0x0000027573230000-0x00000275734D3000-memory.dmp

                memory/1740-160-0x0000000000E20000-0x00000000010B1000-memory.dmp

                memory/1740-159-0x0000027574C80000-0x0000027574DC0000-memory.dmp

                memory/1740-158-0x0000027574C80000-0x0000027574DC0000-memory.dmp

                memory/2824-156-0x0000000004A60000-0x0000000004BA0000-memory.dmp

                memory/2824-154-0x0000000004A60000-0x0000000004BA0000-memory.dmp

                memory/2824-164-0x0000000003E40000-0x0000000004991000-memory.dmp

                memory/2824-146-0x0000000002830000-0x0000000002C6C000-memory.dmp

                memory/2824-155-0x0000000004A60000-0x0000000004BA0000-memory.dmp

                memory/2824-148-0x0000000003E40000-0x0000000004991000-memory.dmp

                memory/2824-149-0x0000000003E40000-0x0000000004991000-memory.dmp

                memory/2824-150-0x0000000003E40000-0x0000000004991000-memory.dmp

                memory/2824-151-0x0000000004A60000-0x0000000004BA0000-memory.dmp

                memory/2824-152-0x0000000004A60000-0x0000000004BA0000-memory.dmp

                memory/2824-153-0x0000000004A60000-0x0000000004BA0000-memory.dmp

                memory/4016-132-0x0000000002EDD000-0x0000000002EF0000-memory.dmp

                memory/4016-135-0x0000000000400000-0x0000000002B93000-memory.dmp

                memory/4016-134-0x0000000000400000-0x0000000002B93000-memory.dmp

                memory/4016-133-0x0000000002E30000-0x0000000002E39000-memory.dmp

                memory/4648-147-0x0000000000400000-0x0000000002E81000-memory.dmp

                memory/4648-139-0x0000000004C21000-0x0000000004F21000-memory.dmp

                memory/4648-140-0x0000000004F30000-0x00000000052EC000-memory.dmp

                memory/4648-141-0x0000000000400000-0x0000000002E81000-memory.dmp