Analysis

  • max time kernel
    150s
  • max time network
    152s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20221111-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
  • submitted
    29/12/2022, 12:41

General

  • Target
    file.exe
  • Size 326KB
  • Sample221229-pwrtsada73
  • SHA256 d7b9c47da642f6f5a5c2e89598427ef7d5f46df43950302e7a3b68ce619a6ca4
  • 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 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
  • 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 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:4888
  • C:\Users\Admin\AppData\Local\Temp\3A9.exe
    C:\Users\Admin\AppData\Local\Temp\3A9.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of WriteProcessMemory
    PID:344
    • C:\Windows\SysWOW64\rundll32.exe
      "C:\Windows\system32\rundll32.exe" "C:\Users\Admin\AppData\Local\Temp\Qfyshwqueqdpai.tmp",Dioeeedresq
      2⤵
      • Blocklisted process makes network request
      • Loads dropped DLL
      • Accesses Microsoft Outlook accounts
      • Accesses Microsoft Outlook profiles
      • Suspicious use of SetThreadContext
      • Drops file in Program Files directory
      • Checks processor information in registry
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of WriteProcessMemory
      • outlook_office_path
      • outlook_win_path
      PID:3108
      • C:\Windows\system32\rundll32.exe
        "C:\Windows\system32\rundll32.exe" "C:\Windows\system32\shell32.dll",#61 13996
        3⤵
        • Modifies registry class
        • Suspicious use of FindShellTrayWindow
        PID:1864
      • C:\Windows\SysWOW64\schtasks.exe
        schtasks /End /tn \Microsoft\Windows\Wininet\CacheTask
        3⤵
          PID:2824
        • C:\Windows\SysWOW64\schtasks.exe
          schtasks /Run /tn \Microsoft\Windows\Wininet\CacheTask
          3⤵
            PID:3944
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 344 -s 528
          2⤵
          • Program crash
          PID:1008
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 448 -p 344 -ip 344
        1⤵
          PID:528
        • C:\Windows\System32\rundll32.exe
          C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
          1⤵
            PID:3508

          Network

                MITRE ATT&CK Enterprise v6

                Replay Monitor

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                Downloads

                3A9.exe

                • Path C:\Users\Admin\AppData\Local\Temp\3A9.exe
                • Size 1.1MB
                • SHA256 f3e89b4065c6299fc2785bf60dabf4a62eb12c3d429aa89190afa44a766b4bc7
                • MD5 SHA1 SHA512 SSDEEP

                3A9.exe

                • Path C:\Users\Admin\AppData\Local\Temp\3A9.exe
                • Size 1.1MB
                • SHA256 f3e89b4065c6299fc2785bf60dabf4a62eb12c3d429aa89190afa44a766b4bc7
                • MD5 SHA1 SHA512 SSDEEP

                Qfyshwqueqdpai.tmp

                • Path C:\Users\Admin\AppData\Local\Temp\Qfyshwqueqdpai.tmp
                • Size 792KB
                • SHA256 72bdb3a06dca8458ac9aedf06785b2d7b95a19f8b9f3f8f5be2eb4744e9c5d1d
                • MD5 SHA1 SHA512 SSDEEP

                Qfyshwqueqdpai.tmp

                • Path C:\Users\Admin\AppData\Local\Temp\Qfyshwqueqdpai.tmp
                • Size 792KB
                • SHA256 72bdb3a06dca8458ac9aedf06785b2d7b95a19f8b9f3f8f5be2eb4744e9c5d1d
                • MD5 SHA1 SHA512 SSDEEP

                memory/344-140-0x0000000000ABC000-0x0000000000B92000-memory.dmp

                memory/344-142-0x0000000002340000-0x0000000002451000-memory.dmp

                memory/344-144-0x0000000000400000-0x0000000000517000-memory.dmp

                memory/1864-156-0x0000000000E40000-0x00000000010DC000-memory.dmp

                memory/1864-157-0x000001A22C2F0000-0x000001A22C59E000-memory.dmp

                memory/1864-155-0x000001A22C1A0000-0x000001A22C2E0000-memory.dmp

                memory/1864-154-0x000001A22C1A0000-0x000001A22C2E0000-memory.dmp

                memory/3108-146-0x0000000006220000-0x0000000006D7D000-memory.dmp

                memory/3108-148-0x0000000004780000-0x00000000048C0000-memory.dmp

                memory/3108-149-0x0000000004780000-0x00000000048C0000-memory.dmp

                memory/3108-150-0x0000000004780000-0x00000000048C0000-memory.dmp

                memory/3108-151-0x0000000004780000-0x00000000048C0000-memory.dmp

                memory/3108-152-0x0000000004780000-0x00000000048C0000-memory.dmp

                memory/3108-147-0x0000000004780000-0x00000000048C0000-memory.dmp

                memory/3108-145-0x0000000006220000-0x0000000006D7D000-memory.dmp

                memory/3108-159-0x0000000006220000-0x0000000006D7D000-memory.dmp

                memory/4888-135-0x0000000000400000-0x0000000000456000-memory.dmp

                memory/4888-134-0x0000000000400000-0x0000000000456000-memory.dmp

                memory/4888-133-0x00000000005B0000-0x00000000005B9000-memory.dmp

                memory/4888-132-0x0000000000677000-0x000000000068C000-memory.dmp