Analysis

  • max time kernel
    151s
  • max time network
    145s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20221111-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
  • submitted
    21/01/2023, 08:20

General

  • Target
    be624ecf973508abc4197fc65c9e5f6f.exe
  • Size 330KB
  • Sample230121-j8e3vsde7z
  • SHA256 ec1543dcb1aac141e705aa67ac43c7ba085bcc2aadba346d13a7ac4f224d79aa
  • 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 27 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 25 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\be624ecf973508abc4197fc65c9e5f6f.exe
    "C:\Users\Admin\AppData\Local\Temp\be624ecf973508abc4197fc65c9e5f6f.exe"
    1⤵
    • Checks SCSI registry key(s)
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious behavior: MapViewOfSection
    PID:2484
  • C:\Users\Admin\AppData\Local\Temp\DF49.exe
    C:\Users\Admin\AppData\Local\Temp\DF49.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of WriteProcessMemory
    PID:4332
    • C:\Windows\SysWOW64\rundll32.exe
      C:\Windows\system32\rundll32.exe C:\Users\Admin\AppData\Local\Temp\Athusdiuuhasd.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:5036
      • C:\Windows\system32\rundll32.exe
        "C:\Windows\system32\rundll32.exe" "C:\Windows\system32\shell32.dll",#61 22593
        3⤵
        • Modifies registry class
        • Suspicious use of FindShellTrayWindow
        PID:4920
      • C:\Windows\SysWOW64\schtasks.exe
        schtasks /End /tn \Microsoft\Windows\Wininet\CacheTask
        3⤵
          PID:4684
        • C:\Windows\SysWOW64\schtasks.exe
          schtasks /Run /tn \Microsoft\Windows\Wininet\CacheTask
          3⤵
            PID:3612
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 4332 -s 488
          2⤵
          • Program crash
          PID:4224
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 4332 -ip 4332
        1⤵
          PID:4080
        • C:\Windows\System32\rundll32.exe
          C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
          1⤵
            PID:3460

          Network

                MITRE ATT&CK Enterprise v6

                Replay Monitor

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                Downloads

                Athusdiuuhasd.dll

                • Path C:\Users\Admin\AppData\Local\Temp\Athusdiuuhasd.dll
                • Size 4.4MB
                • SHA256 e9ef29c6f37e9cf970ace09f428904c47d833a62722295a84d9a71e6b73470f4
                • MD5 SHA1 SHA512 SSDEEP

                Athusdiuuhasd.dll

                • Path C:\Users\Admin\AppData\Local\Temp\Athusdiuuhasd.dll
                • Size 4.4MB
                • SHA256 e9ef29c6f37e9cf970ace09f428904c47d833a62722295a84d9a71e6b73470f4
                • MD5 SHA1 SHA512 SSDEEP

                Athusdiuuhasd.dll

                • Path C:\Users\Admin\AppData\Local\Temp\Athusdiuuhasd.dll
                • Size 4.4MB
                • SHA256 e9ef29c6f37e9cf970ace09f428904c47d833a62722295a84d9a71e6b73470f4
                • MD5 SHA1 SHA512 SSDEEP

                DF49.exe

                • Path C:\Users\Admin\AppData\Local\Temp\DF49.exe
                • Size 3.7MB
                • SHA256 9a3ad0f29c064a09a752ccf4fd1d9a2de0929992e4684f620865e82839366016
                • MD5 SHA1 SHA512 SSDEEP

                DF49.exe

                • Path C:\Users\Admin\AppData\Local\Temp\DF49.exe
                • Size 3.7MB
                • SHA256 9a3ad0f29c064a09a752ccf4fd1d9a2de0929992e4684f620865e82839366016
                • MD5 SHA1 SHA512 SSDEEP

                memory/2484-133-0x0000000002190000-0x0000000002199000-memory.dmp

                memory/2484-134-0x0000000000400000-0x000000000045A000-memory.dmp

                memory/2484-135-0x0000000000400000-0x000000000045A000-memory.dmp

                memory/2484-132-0x000000000056E000-0x0000000000584000-memory.dmp

                memory/4332-148-0x0000000000400000-0x0000000002F19000-memory.dmp

                memory/4332-139-0x0000000004C11000-0x0000000004FA2000-memory.dmp

                memory/4332-141-0x0000000000400000-0x0000000002F19000-memory.dmp

                memory/4332-140-0x0000000004FB0000-0x00000000054A0000-memory.dmp

                memory/4920-159-0x000001D2F44E0000-0x000001D2F4620000-memory.dmp

                memory/4920-162-0x000001D2F2A90000-0x000001D2F2D33000-memory.dmp

                memory/4920-161-0x0000000000760000-0x00000000009F1000-memory.dmp

                memory/4920-160-0x000001D2F44E0000-0x000001D2F4620000-memory.dmp

                memory/5036-153-0x0000000004600000-0x0000000004740000-memory.dmp

                memory/5036-154-0x0000000005030000-0x0000000005170000-memory.dmp

                memory/5036-155-0x0000000004600000-0x0000000004740000-memory.dmp

                memory/5036-156-0x0000000004600000-0x0000000004740000-memory.dmp

                memory/5036-157-0x0000000004600000-0x0000000004740000-memory.dmp

                memory/5036-149-0x0000000002410000-0x000000000287E000-memory.dmp

                memory/5036-152-0x0000000004600000-0x0000000004740000-memory.dmp

                memory/5036-151-0x00000000039E0000-0x000000000453A000-memory.dmp

                memory/5036-150-0x00000000039E0000-0x000000000453A000-memory.dmp

                memory/5036-163-0x00000000039E0000-0x000000000453A000-memory.dmp

                memory/5036-147-0x0000000002410000-0x000000000287E000-memory.dmp

                memory/5036-146-0x0000000002410000-0x000000000287E000-memory.dmp