Analysis

  • max time kernel
    148s
  • max time network
    152s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220901-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system
  • submitted
    22/12/2022, 11:07

General

  • Target
    file.exe
  • Size 318KB
  • Sample221222-m7zbwsed27
  • SHA256 abcb39b5f6f417023963894bd17a9cdd009291bde79ff323caa5ce49627be9d1
  • 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 25 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:5028
  • C:\Users\Admin\AppData\Local\Temp\1DB9.exe
    C:\Users\Admin\AppData\Local\Temp\1DB9.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of WriteProcessMemory
    PID:4504
    • 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
      • 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:4420
      • C:\Windows\system32\rundll32.exe
        "C:\Windows\system32\rundll32.exe" "C:\Windows\system32\shell32.dll",#61 20471
        3⤵
        • Modifies registry class
        • Suspicious use of FindShellTrayWindow
        PID:4924
      • C:\Windows\SysWOW64\schtasks.exe
        schtasks /End /tn \Microsoft\Windows\Wininet\CacheTask
        3⤵
          PID:4484
        • C:\Windows\SysWOW64\schtasks.exe
          schtasks /Run /tn \Microsoft\Windows\Wininet\CacheTask
          3⤵
            PID:4828
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 4504 -s 528
          2⤵
          • Program crash
          PID:1828
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 4504 -ip 4504
        1⤵
          PID:3196
        • C:\Windows\System32\rundll32.exe
          C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
          1⤵
            PID:2868
          • C:\Windows\SysWOW64\svchost.exe
            C:\Windows\SysWOW64\svchost.exe -k LocalService
            1⤵
              PID:4284

            Network

                  MITRE ATT&CK Enterprise v6

                  Replay Monitor

                  Loading Replay Monitor...

                  Downloads

                  share.dll

                  • Path C:\Program Files (x86)\Windows NT\TableTextService\share.dll
                  • Size 777KB
                  • SHA256 38b73df787facb1a34855cf4a009075fe525265e03129e66cc69be40c922348e
                  • MD5 SHA1 SHA512 SSDEEP

                  Pyedeutsp.tmp

                  • Path C:\ProgramData\{576BD351-9723-2BFC-7725-1FF3BC535706}\Pyedeutsp.tmp
                  • Size 1.7MB
                  • SHA256 caaac409610c8cffd4722899d8e2a2f74d7d1106378f405da21f7d284eff6a38
                  • MD5 SHA1 SHA512 SSDEEP

                  1DB9.exe

                  • Path C:\Users\Admin\AppData\Local\Temp\1DB9.exe
                  • Size 1.1MB
                  • SHA256 b61186b0ebb67f79943d8bcccde51c220f1d26250eb87a3e9d136417b10833df
                  • MD5 SHA1 SHA512 SSDEEP

                  1DB9.exe

                  • Path C:\Users\Admin\AppData\Local\Temp\1DB9.exe
                  • Size 1.1MB
                  • SHA256 b61186b0ebb67f79943d8bcccde51c220f1d26250eb87a3e9d136417b10833df
                  • 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

                  share.dll

                  • Path \??\c:\program files (x86)\windows nt\tabletextservice\share.dll
                  • Size 777KB
                  • SHA256 38b73df787facb1a34855cf4a009075fe525265e03129e66cc69be40c922348e
                  • MD5 SHA1 SHA512 SSDEEP

                  memory/4420-150-0x0000000004B10000-0x0000000004C50000-memory.dmp

                  memory/4420-155-0x0000000004B10000-0x0000000004C50000-memory.dmp

                  memory/4420-164-0x0000000005010000-0x0000000005B77000-memory.dmp

                  memory/4420-154-0x0000000004B10000-0x0000000004C50000-memory.dmp

                  memory/4420-153-0x0000000004B10000-0x0000000004C50000-memory.dmp

                  memory/4420-148-0x0000000005010000-0x0000000005B77000-memory.dmp

                  memory/4420-149-0x0000000005010000-0x0000000005B77000-memory.dmp

                  memory/4420-151-0x0000000004B10000-0x0000000004C50000-memory.dmp

                  memory/4420-152-0x00000000072A0000-0x00000000073E0000-memory.dmp

                  memory/4504-147-0x0000000000400000-0x0000000000519000-memory.dmp

                  memory/4504-146-0x0000000002380000-0x0000000002493000-memory.dmp

                  memory/4504-145-0x0000000002085000-0x000000000215C000-memory.dmp

                  memory/4924-159-0x0000000000FE0000-0x0000000001274000-memory.dmp

                  memory/4924-160-0x000001DBF5370000-0x000001DBF5615000-memory.dmp

                  memory/4924-158-0x000001DBF6DC0000-0x000001DBF6F00000-memory.dmp

                  memory/4924-162-0x000001DBF5370000-0x000001DBF5615000-memory.dmp

                  memory/4924-157-0x000001DBF6DC0000-0x000001DBF6F00000-memory.dmp

                  memory/5028-135-0x00000000005CD000-0x00000000005E3000-memory.dmp

                  memory/5028-138-0x0000000000400000-0x0000000000456000-memory.dmp

                  memory/5028-137-0x0000000000400000-0x0000000000456000-memory.dmp

                  memory/5028-136-0x0000000000520000-0x0000000000529000-memory.dmp