Analysis

  • max time kernel
    158s
  • max time network
    161s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220812-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
  • submitted
    22/12/2022, 15:25

General

  • Target
    file.exe
  • Size 318KB
  • Sample221222-stlfrsef89
  • SHA256 da5a1309d8b4ee724d68c0785b02bda683c3fd198bf02627b4e14c6307348c20
  • 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
  • Sets DLL path for service in the registry 2 TTPs 1 IoCs
  • Sets service image path in registry 2 TTPs 3 IoCs
  • Loads dropped DLL 1 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
  • Drops file in Program Files directory 12 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 19 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 14 IoCs
  • Suspicious use of FindShellTrayWindow 1 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 9 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:1236
  • C:\Users\Admin\AppData\Local\Temp\34C.exe
    C:\Users\Admin\AppData\Local\Temp\34C.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of WriteProcessMemory
    PID:1924
    • C:\Windows\SysWOW64\rundll32.exe
      "C:\Windows\system32\rundll32.exe" "C:\Users\Admin\AppData\Local\Temp\Dsdoiysdsysh.tmp",Ieoftteeywo
      2⤵
      • Blocklisted process makes network request
      • Sets DLL path for service in the registry
      • Sets service image path in registry
      • Loads dropped DLL
      • Suspicious use of SetThreadContext
      • Drops file in Program Files directory
      • Checks processor information in registry
      • Suspicious use of WriteProcessMemory
      PID:4080
      • C:\Windows\system32\rundll32.exe
        "C:\Windows\system32\rundll32.exe" "C:\Windows\system32\shell32.dll",#61 20465
        3⤵
        • Modifies registry class
        • Suspicious use of FindShellTrayWindow
        PID:1876
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 1924 -s 528
      2⤵
      • Program crash
      PID:360
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 452 -p 1924 -ip 1924
    1⤵
      PID:3372
    • C:\Windows\System32\rundll32.exe
      C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
      1⤵
        PID:1956
      • C:\Windows\SysWOW64\svchost.exe
        C:\Windows\SysWOW64\svchost.exe -k LocalService
        1⤵
          PID:3056
          • C:\Windows\SysWOW64\rundll32.exe
            "C:\Windows\system32\rundll32.exe" "c:\program files (x86)\windows multimedia platform\submission_history.dll",hyleNFpRODQ=
            2⤵
              PID:808

          Network

                MITRE ATT&CK Enterprise v6

                Replay Monitor

                Loading Replay Monitor...

                Downloads

                submission_history.dll

                • Path C:\Program Files (x86)\Windows Multimedia Platform\submission_history.dll
                • Size 777KB
                • SHA256 59a289832ebf4058ebba83c107e90918843c8541bcf01f7a646eb478593eb39a
                • MD5 SHA1 SHA512 SSDEEP

                submission_history.dll

                • Path C:\Program Files (x86)\Windows Multimedia Platform\submission_history.dll
                • Size 777KB
                • SHA256 59a289832ebf4058ebba83c107e90918843c8541bcf01f7a646eb478593eb39a
                • MD5 SHA1 SHA512 SSDEEP

                C2RManifest.dcfmui.msi.16.en-us.xml

                • Path C:\ProgramData\{576BD351-9723-2BFC-7725-1FF3BC535706}\C2RManifest.dcfmui.msi.16.en-us.xml
                • Size 9KB
                • SHA256 d98dec16b13c3e4a23823be0bcd45f685c6dc690ae28954c0c18075e77898f20
                • MD5 SHA1 SHA512 SSDEEP

                C2RManifest.officemuiset.msi.16.en-us.xml

                • Path C:\ProgramData\{576BD351-9723-2BFC-7725-1FF3BC535706}\C2RManifest.officemuiset.msi.16.en-us.xml
                • Size 1KB
                • SHA256 f5b39bd24efbf27831061a34d1a78cea8f0073bfccade786129495f17cf2f112
                • MD5 SHA1 SHA512

                Microsoft.DesktopAppInstaller_2019.125.2243.0_neutral_~_8wekyb3d8bbwe.xml

                • Path C:\ProgramData\{576BD351-9723-2BFC-7725-1FF3BC535706}\Microsoft.DesktopAppInstaller_2019.125.2243.0_neutral_~_8wekyb3d8bbwe.xml
                • Size 26KB
                • SHA256 d8bd4c83debd08b1a21d24b3c4a445512ef1931717c01e113fbfc20f47157ea8
                • MD5 SHA1 SHA512 SSDEEP

                Microsoft.MicrosoftOfficeHub_18.1903.1152.0_neutral_split.scale-125_8wekyb3d8bbwe.xml

                • Path C:\ProgramData\{576BD351-9723-2BFC-7725-1FF3BC535706}\Microsoft.MicrosoftOfficeHub_18.1903.1152.0_neutral_split.scale-125_8wekyb3d8bbwe.xml
                • Size 913B
                • SHA256 49300e653a9546101b9d906d9782250976b92aaa7f6d92b561f130d5ac6c856f
                • MD5 SHA1 SHA512

                MicrosoftOffice2013BackupWin32.xml

                • Path C:\ProgramData\{576BD351-9723-2BFC-7725-1FF3BC535706}\MicrosoftOffice2013BackupWin32.xml
                • Size 12KB
                • SHA256 3e0f02c2bd9c695d43963c9085e496ab42e7914bdc05f511d56442883c6c9687
                • MD5 SHA1 SHA512 SSDEEP

                Pyedeutsp.tmp

                • Path C:\ProgramData\{576BD351-9723-2BFC-7725-1FF3BC535706}\Pyedeutsp.tmp
                • Size 3.5MB
                • SHA256 bd0143a8171a5f47b43e4f7d9287aaf132767a2e2f5aae91516fa05e57a5f22e
                • MD5 SHA1 SHA512 SSDEEP

                Pyedeutsp.tmp

                • Path C:\ProgramData\{576BD351-9723-2BFC-7725-1FF3BC535706}\Pyedeutsp.tmp
                • Size 3.4MB
                • SHA256 599b6accb99a2868824de117018261cf7968f0fc5d39014f99d6f302a3087887
                • MD5 SHA1 SHA512 SSDEEP

                34C.exe

                • Path C:\Users\Admin\AppData\Local\Temp\34C.exe
                • Size 1.1MB
                • SHA256 137e531c9d1372f97c4b8ca36cbd595b8e3f7aaec8c06b0abe48be45449cc139
                • MD5 SHA1 SHA512 SSDEEP

                34C.exe

                • Path C:\Users\Admin\AppData\Local\Temp\34C.exe
                • Size 1.1MB
                • SHA256 137e531c9d1372f97c4b8ca36cbd595b8e3f7aaec8c06b0abe48be45449cc139
                • MD5 SHA1 SHA512 SSDEEP

                Dsdoiysdsysh.tmp

                • Path C:\Users\Admin\AppData\Local\Temp\Dsdoiysdsysh.tmp
                • Size 777KB
                • SHA256 16e766159a5706f4278b48824d00707ecc8329f55af3204cf6b96f8c573ac1a9
                • MD5 SHA1 SHA512 SSDEEP

                Dsdoiysdsysh.tmp

                • Path C:\Users\Admin\AppData\Local\Temp\Dsdoiysdsysh.tmp
                • Size 777KB
                • SHA256 16e766159a5706f4278b48824d00707ecc8329f55af3204cf6b96f8c573ac1a9
                • MD5 SHA1 SHA512 SSDEEP

                submission_history.dll

                • Path \??\c:\program files (x86)\windows multimedia platform\submission_history.dll
                • Size 777KB
                • SHA256 59a289832ebf4058ebba83c107e90918843c8541bcf01f7a646eb478593eb39a
                • MD5 SHA1 SHA512 SSDEEP

                memory/1236-134-0x0000000000400000-0x0000000000456000-memory.dmp

                memory/1236-135-0x0000000000400000-0x0000000000456000-memory.dmp

                memory/1236-133-0x00000000005F0000-0x00000000005F9000-memory.dmp

                memory/1236-132-0x000000000069D000-0x00000000006B3000-memory.dmp

                memory/1876-156-0x000002448C750000-0x000002448C890000-memory.dmp

                memory/1876-158-0x000002448AD00000-0x000002448AFA5000-memory.dmp

                memory/1876-157-0x00000000009E0000-0x0000000000C74000-memory.dmp

                memory/1876-155-0x000002448C750000-0x000002448C890000-memory.dmp

                memory/1924-142-0x00000000021C9000-0x00000000022A1000-memory.dmp

                memory/1924-143-0x0000000002350000-0x0000000002463000-memory.dmp

                memory/1924-144-0x0000000000400000-0x0000000000519000-memory.dmp

                memory/3056-163-0x0000000004420000-0x0000000004F87000-memory.dmp

                memory/3056-172-0x0000000004420000-0x0000000004F87000-memory.dmp

                memory/4080-150-0x00000000046F0000-0x0000000004830000-memory.dmp

                memory/4080-149-0x00000000046F0000-0x0000000004830000-memory.dmp

                memory/4080-148-0x00000000046F0000-0x0000000004830000-memory.dmp

                memory/4080-147-0x00000000046F0000-0x0000000004830000-memory.dmp

                memory/4080-146-0x0000000004CC0000-0x0000000005827000-memory.dmp

                memory/4080-145-0x0000000004CC0000-0x0000000005827000-memory.dmp

                memory/4080-153-0x00000000046F0000-0x0000000004830000-memory.dmp

                memory/4080-152-0x0000000004769000-0x000000000476B000-memory.dmp

                memory/4080-159-0x0000000004CC0000-0x0000000005827000-memory.dmp

                memory/4080-151-0x00000000046F0000-0x0000000004830000-memory.dmp