Analysis

  • max time kernel
    145s
  • max time network
    149s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220812-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
  • submitted
    08/01/2023, 07:22

General

  • Target
    file.exe
  • Size 264KB
  • Sample230108-h683gsda52
  • SHA256 4381432a0b7b1cd7d90206fecbf8c543ebcb23746ea13c23eb8433894bce8217
  • 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 3 IoCs
  • Downloads MZ/PE file
  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 1 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 26 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 23 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:2424
  • C:\Users\Admin\AppData\Local\Temp\D66F.exe
    C:\Users\Admin\AppData\Local\Temp\D66F.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of WriteProcessMemory
    PID:3828
    • C:\Windows\SysWOW64\rundll32.exe
      "C:\Windows\system32\rundll32.exe" "C:\Users\Admin\AppData\Local\Temp\Wtfoiq.tmp",Iyidwoiowsw
      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:3644
      • C:\Windows\system32\rundll32.exe
        "C:\Windows\system32\rundll32.exe" "C:\Windows\system32\shell32.dll",#61 15605
        3⤵
        • Modifies registry class
        • Suspicious use of FindShellTrayWindow
        PID:4172
      • C:\Windows\SysWOW64\schtasks.exe
        schtasks /End /tn \Microsoft\Windows\Wininet\CacheTask
        3⤵
          PID:4524
        • C:\Windows\SysWOW64\schtasks.exe
          schtasks /Run /tn \Microsoft\Windows\Wininet\CacheTask
          3⤵
            PID:3844
          • C:\Windows\SysWOW64\schtasks.exe
            schtasks /End /tn \Microsoft\Windows\Wininet\CacheTask
            3⤵
              PID:1716
          • C:\Windows\SysWOW64\WerFault.exe
            C:\Windows\SysWOW64\WerFault.exe -u -p 3828 -s 468
            2⤵
            • Program crash
            PID:3656
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -pss -s 432 -p 3828 -ip 3828
          1⤵
            PID:3632
          • C:\Windows\System32\rundll32.exe
            C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
            1⤵
              PID:4084
            • C:\Windows\SysWOW64\svchost.exe
              C:\Windows\SysWOW64\svchost.exe -k LocalService
              1⤵
                PID:1804
                • C:\Windows\SysWOW64\rundll32.exe
                  "C:\Windows\system32\rundll32.exe" "c:\program files (x86)\windowspowershell\modules\spelling.dll",VkYQZEQx
                  2⤵
                    PID:2028

                Network

                      MITRE ATT&CK Enterprise v6

                      Replay Monitor

                      Loading Replay Monitor...

                      Downloads

                      Spelling.dll

                      • Path C:\Program Files (x86)\WindowsPowerShell\Modules\Spelling.dll
                      • Size 714KB
                      • SHA256 aa3c3c4f2552f7a17eacb967fd758b1b9bbccb443f6c8024c3778794f9d6fdf6
                      • MD5 SHA1 SHA512 SSDEEP

                      Spelling.dll

                      • Path C:\Program Files (x86)\WindowsPowerShell\Modules\Spelling.dll
                      • Size 714KB
                      • SHA256 aa3c3c4f2552f7a17eacb967fd758b1b9bbccb443f6c8024c3778794f9d6fdf6
                      • MD5 SHA1 SHA512 SSDEEP

                      E2A4F912-2574-4A75-9BB0-0D023378592B_10.0.19041.1023_neutral_neutral_cw5n1h2txyewy.xml

                      • Path C:\ProgramData\{B7E8E476-349D-60AA-651B-798B40E3CAEC}\E2A4F912-2574-4A75-9BB0-0D023378592B_10.0.19041.1023_neutral_neutral_cw5n1h2txyewy.xml
                      • Size 2KB
                      • SHA256 c8c2ac11232a448dd5d78c34752f56b8f5b8e18fe79b3176fdd88759d5b703d5
                      • MD5 SHA1 SHA512

                      Microsoft.BingWeather_4.25.20211.0_neutral_split.scale-100_8wekyb3d8bbwe.xml

                      • Path C:\ProgramData\{B7E8E476-349D-60AA-651B-798B40E3CAEC}\Microsoft.BingWeather_4.25.20211.0_neutral_split.scale-100_8wekyb3d8bbwe.xml
                      • Size 849B
                      • SHA256 0b9ef96887d1143ced0048b15f5437eaf878c932dd89a05794a742ce8f905fe6
                      • MD5 SHA1 SHA512

                      Microsoft.MicrosoftStickyNotes_3.6.73.0_neutral_split.scale-125_8wekyb3d8bbwe.xml

                      • Path C:\ProgramData\{B7E8E476-349D-60AA-651B-798B40E3CAEC}\Microsoft.MicrosoftStickyNotes_3.6.73.0_neutral_split.scale-125_8wekyb3d8bbwe.xml
                      • Size 827B
                      • SHA256 ffc4b3afeec6909f2b6e167d903c624448bb8b5e3540142a0a762953dc758c85
                      • MD5 SHA1 SHA512

                      MicrosoftOffice2016Win32.xml

                      • Path C:\ProgramData\{B7E8E476-349D-60AA-651B-798B40E3CAEC}\MicrosoftOffice2016Win32.xml
                      • Size 64KB
                      • SHA256 bc964a0306fbeca377d20bafd127425c0700ee293a2c5caf9b28285f1b1d75e5
                      • MD5 SHA1 SHA512 SSDEEP

                      Rwdfud.tmp

                      • Path C:\ProgramData\{B7E8E476-349D-60AA-651B-798B40E3CAEC}\Rwdfud.tmp
                      • Size 3.5MB
                      • SHA256 a6adeb87a7382261b33f7862faac0cb6e8fd137daacc4f2584fd9b27818baee2
                      • MD5 SHA1 SHA512 SSDEEP

                      background.png

                      • Path C:\ProgramData\{B7E8E476-349D-60AA-651B-798B40E3CAEC}\background.png
                      • Size 126KB
                      • SHA256 d3e8d47e8c1622ec10adef672ca7a8992748c4f0a4e75f877462e7e661069698
                      • MD5 SHA1 SHA512 SSDEEP

                      edbres00001.jrs

                      • Path C:\ProgramData\{B7E8E476-349D-60AA-651B-798B40E3CAEC}\edbres00001.jrs
                      • Size 64KB
                      • SHA256 de2f256064a0af797747c2b97505dc0b9f3df0de4f489eac731c23ae9ca9cc31
                      • MD5 SHA1 SHA512 SSDEEP

                      edbtmp.log

                      • Path C:\ProgramData\{B7E8E476-349D-60AA-651B-798B40E3CAEC}\edbtmp.log
                      • Size 64KB
                      • SHA256 fc4893227a67c20d08a4e6b88ea87a909dbe011c9c82298548d2f25054da23b3
                      • MD5 SHA1 SHA512 SSDEEP

                      guest.png

                      • Path C:\ProgramData\{B7E8E476-349D-60AA-651B-798B40E3CAEC}\guest.png
                      • Size 5KB
                      • SHA256 98817a572430813ca4ca2787dab20573f7864c5168ac6912f34d14b49e7bd7c9
                      • MD5 SHA1 SHA512 SSDEEP

                      settings.ico

                      • Path C:\ProgramData\{B7E8E476-349D-60AA-651B-798B40E3CAEC}\settings.ico
                      • Size 66KB
                      • SHA256 1160a3a774b52f07453bde44755fbf76a8b1534c5ade19402f05857c249056b3
                      • MD5 SHA1 SHA512 SSDEEP

                      superbar.png

                      • Path C:\ProgramData\{B7E8E476-349D-60AA-651B-798B40E3CAEC}\superbar.png
                      • Size 38KB
                      • SHA256 0f35ace5268db33940ed18e946a9c65be4e31ec0ae31faa6e60122859c5cb5ca
                      • MD5 SHA1 SHA512 SSDEEP

                      D66F.exe

                      • Path C:\Users\Admin\AppData\Local\Temp\D66F.exe
                      • Size 1.0MB
                      • SHA256 6c71ea1c2da61692b2f287f38847437398ff38b12fe5a8b26f2307bb27d45002
                      • MD5 SHA1 SHA512 SSDEEP

                      D66F.exe

                      • Path C:\Users\Admin\AppData\Local\Temp\D66F.exe
                      • Size 1.0MB
                      • SHA256 6c71ea1c2da61692b2f287f38847437398ff38b12fe5a8b26f2307bb27d45002
                      • MD5 SHA1 SHA512 SSDEEP

                      Wtfoiq.tmp

                      • Path C:\Users\Admin\AppData\Local\Temp\Wtfoiq.tmp
                      • Size 714KB
                      • SHA256 d0ac0e9021c6e231c60256198309b7f72ce4c5e772cf343b5456c2ce0664b9bd
                      • MD5 SHA1 SHA512 SSDEEP

                      Wtfoiq.tmp

                      • Path C:\Users\Admin\AppData\Local\Temp\Wtfoiq.tmp
                      • Size 714KB
                      • SHA256 d0ac0e9021c6e231c60256198309b7f72ce4c5e772cf343b5456c2ce0664b9bd
                      • MD5 SHA1 SHA512 SSDEEP

                      spelling.dll

                      • Path \??\c:\program files (x86)\windowspowershell\modules\spelling.dll
                      • Size 714KB
                      • SHA256 aa3c3c4f2552f7a17eacb967fd758b1b9bbccb443f6c8024c3778794f9d6fdf6
                      • MD5 SHA1 SHA512 SSDEEP

                      memory/1804-167-0x0000000003810000-0x0000000004351000-memory.dmp

                      memory/1804-166-0x0000000003810000-0x0000000004351000-memory.dmp

                      memory/2028-181-0x0000000004A10000-0x0000000005551000-memory.dmp

                      memory/2028-180-0x0000000004A10000-0x0000000005551000-memory.dmp

                      memory/2424-132-0x0000000002C7D000-0x0000000002C8E000-memory.dmp

                      memory/2424-134-0x0000000000400000-0x0000000002BAA000-memory.dmp

                      memory/2424-135-0x0000000002C7D000-0x0000000002C8E000-memory.dmp

                      memory/2424-136-0x0000000000400000-0x0000000002BAA000-memory.dmp

                      memory/2424-133-0x00000000048E0000-0x00000000048E9000-memory.dmp

                      memory/3644-146-0x0000000005030000-0x0000000005B71000-memory.dmp

                      memory/3644-148-0x0000000004B10000-0x0000000004C50000-memory.dmp

                      memory/3644-147-0x0000000005030000-0x0000000005B71000-memory.dmp

                      memory/3644-150-0x0000000004B10000-0x0000000004C50000-memory.dmp

                      memory/3644-159-0x0000000005030000-0x0000000005B71000-memory.dmp

                      memory/3644-152-0x0000000004B10000-0x0000000004C50000-memory.dmp

                      memory/3644-153-0x0000000004B10000-0x0000000004C50000-memory.dmp

                      memory/3644-149-0x0000000004B10000-0x0000000004C50000-memory.dmp

                      memory/3644-151-0x0000000004B10000-0x0000000004C50000-memory.dmp

                      memory/3828-142-0x0000000004AA0000-0x0000000004BB5000-memory.dmp

                      memory/3828-141-0x00000000049C7000-0x0000000004A9B000-memory.dmp

                      memory/3828-145-0x0000000000400000-0x0000000002C6E000-memory.dmp

                      memory/4172-158-0x000001EF372E0000-0x000001EF37592000-memory.dmp

                      memory/4172-155-0x000001EF38D40000-0x000001EF38E80000-memory.dmp

                      memory/4172-156-0x000001EF38D40000-0x000001EF38E80000-memory.dmp

                      memory/4172-157-0x0000000000F80000-0x0000000001221000-memory.dmp