Analysis

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

    arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
  • submitted
    07/01/2023, 13:38

General

  • Target
    file.exe
  • Size 320KB
  • Sample230107-qxc8fsdf89
  • SHA256 90369817c82aae26e575ff29d7e2f6bafde58ca3b7247a58405b04cd70c6d9dd
  • 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 4 IoCs
  • Downloads MZ/PE file
  • Executes dropped EXE 2 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 6 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 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 21 IoCs
  • Suspicious use of FindShellTrayWindow 10 IoCs
  • Suspicious use of SendNotifyMessage 1 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:1048
  • C:\Users\Admin\AppData\Local\Temp\446.exe
    C:\Users\Admin\AppData\Local\Temp\446.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of WriteProcessMemory
    PID:636
    • 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:1260
      • 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:2624
      • C:\Windows\SysWOW64\schtasks.exe
        schtasks /End /tn \Microsoft\Windows\Wininet\CacheTask
        3⤵
          PID:1932
        • C:\Windows\SysWOW64\schtasks.exe
          schtasks /Run /tn \Microsoft\Windows\Wininet\CacheTask
          3⤵
            PID:3856
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 636 -s 528
          2⤵
          • Program crash
          PID:1980
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 436 -p 636 -ip 636
        1⤵
          PID:1396
        • C:\Windows\System32\rundll32.exe
          C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
          1⤵
            PID:4288
          • C:\Users\Admin\AppData\Roaming\ujjtcdw
            C:\Users\Admin\AppData\Roaming\ujjtcdw
            1⤵
            • Executes dropped EXE
            • Checks SCSI registry key(s)
            • Suspicious behavior: MapViewOfSection
            PID:3384

          Network

                MITRE ATT&CK Enterprise v6

                Replay Monitor

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                Downloads

                446.exe

                • Path C:\Users\Admin\AppData\Local\Temp\446.exe
                • Size 1.1MB
                • SHA256 84828aecf9ce85ca4e87dc67e6b241c7b3a01eb9efda8078ff703fb7de88dd82
                • MD5 SHA1 SHA512 SSDEEP

                446.exe

                • Path C:\Users\Admin\AppData\Local\Temp\446.exe
                • Size 1.1MB
                • SHA256 84828aecf9ce85ca4e87dc67e6b241c7b3a01eb9efda8078ff703fb7de88dd82
                • 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

                ujjtcdw

                • Path C:\Users\Admin\AppData\Roaming\ujjtcdw
                • Size 320KB
                • SHA256 90369817c82aae26e575ff29d7e2f6bafde58ca3b7247a58405b04cd70c6d9dd
                • MD5 SHA1 SHA512 SSDEEP

                ujjtcdw

                • Path C:\Users\Admin\AppData\Roaming\ujjtcdw
                • Size 320KB
                • SHA256 90369817c82aae26e575ff29d7e2f6bafde58ca3b7247a58405b04cd70c6d9dd
                • MD5 SHA1 SHA512 SSDEEP

                memory/636-143-0x0000000004E60000-0x0000000004F75000-memory.dmp

                memory/636-142-0x0000000004D85000-0x0000000004E59000-memory.dmp

                memory/636-144-0x0000000000400000-0x00000000030D2000-memory.dmp

                memory/1048-135-0x0000000000400000-0x0000000003013000-memory.dmp

                memory/1048-134-0x0000000000400000-0x0000000003013000-memory.dmp

                memory/1048-133-0x0000000004C20000-0x0000000004C29000-memory.dmp

                memory/1048-132-0x000000000307D000-0x0000000003093000-memory.dmp

                memory/1260-150-0x0000000005B60000-0x0000000005CA0000-memory.dmp

                memory/1260-165-0x0000000005C53000-0x0000000005C55000-memory.dmp

                memory/1260-148-0x0000000004970000-0x0000000004AB0000-memory.dmp

                memory/1260-149-0x0000000005B60000-0x0000000005CA0000-memory.dmp

                memory/1260-146-0x00000000067D0000-0x0000000007311000-memory.dmp

                memory/1260-152-0x0000000004970000-0x0000000004AB0000-memory.dmp

                memory/1260-151-0x0000000004970000-0x0000000004AB0000-memory.dmp

                memory/1260-154-0x0000000005C53000-0x0000000005C55000-memory.dmp

                memory/1260-145-0x00000000067D0000-0x0000000007311000-memory.dmp

                memory/1260-147-0x0000000004970000-0x0000000004AB0000-memory.dmp

                memory/1260-164-0x0000000005C15000-0x0000000005C17000-memory.dmp

                memory/1260-155-0x0000000005C15000-0x0000000005C17000-memory.dmp

                memory/1260-161-0x00000000067D0000-0x0000000007311000-memory.dmp

                memory/2624-159-0x00000000000A0000-0x0000000000341000-memory.dmp

                memory/2624-163-0x000001FD434E0000-0x000001FD43792000-memory.dmp

                memory/2624-158-0x000001FD43360000-0x000001FD434A0000-memory.dmp

                memory/2624-156-0x000001FD43360000-0x000001FD434A0000-memory.dmp

                memory/2624-157-0x000001FD434E0000-0x000001FD43792000-memory.dmp

                memory/3384-168-0x000000000304D000-0x0000000003062000-memory.dmp

                memory/3384-169-0x0000000000400000-0x0000000003013000-memory.dmp

                memory/3384-170-0x0000000000400000-0x0000000003013000-memory.dmp