Analysis

  • max time kernel
    150s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20221111-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
  • submitted
    11/01/2023, 12:47

General

  • Target
    file.exe
  • Size 327KB
  • Sample230111-pz7dmscb72
  • SHA256 6d1085ca99904e2f7d26eb2e2b040929c00d5a3d6e39437b53b6b7aaab8bd690
  • 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 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
  • Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
  • 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 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 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 21 IoCs
  • Suspicious use of FindShellTrayWindow 10 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 18 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:4332
  • C:\Users\Admin\AppData\Local\Temp\20E6.exe
    C:\Users\Admin\AppData\Local\Temp\20E6.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of WriteProcessMemory
    PID:5112
    • C:\Windows\SysWOW64\rundll32.exe
      "C:\Windows\system32\rundll32.exe" "C:\Users\Admin\AppData\Local\Temp\Qytyaworpiotpd.tmp",Edoqqdswdffqipe
      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:3172
      • C:\Windows\system32\rundll32.exe
        "C:\Windows\system32\rundll32.exe" "C:\Windows\system32\shell32.dll",#61 23759
        3⤵
        • Modifies registry class
        • Suspicious use of FindShellTrayWindow
        PID:1540
      • C:\Windows\SysWOW64\schtasks.exe
        schtasks /End /tn \Microsoft\Windows\Wininet\CacheTask
        3⤵
          PID:3836
        • C:\Windows\SysWOW64\schtasks.exe
          schtasks /Run /tn \Microsoft\Windows\Wininet\CacheTask
          3⤵
            PID:2592
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 5112 -s 560
          2⤵
          • Program crash
          PID:3748
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 460 -p 5112 -ip 5112
        1⤵
          PID:5064
        • C:\Windows\System32\rundll32.exe
          C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
          1⤵
            PID:396
          • C:\Users\Admin\AppData\Local\Temp\F3A8.exe
            C:\Users\Admin\AppData\Local\Temp\F3A8.exe
            1⤵
            • Executes dropped EXE
            PID:2348

          Network

                MITRE ATT&CK Enterprise v6

                Replay Monitor

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                Downloads

                20E6.exe

                • Path C:\Users\Admin\AppData\Local\Temp\20E6.exe
                • Size 1.1MB
                • SHA256 33ce3667901ba42f04678e49b2153420e0b85094d8c3640077cabc751f348f55
                • MD5 SHA1 SHA512 SSDEEP

                20E6.exe

                • Path C:\Users\Admin\AppData\Local\Temp\20E6.exe
                • Size 1.1MB
                • SHA256 33ce3667901ba42f04678e49b2153420e0b85094d8c3640077cabc751f348f55
                • MD5 SHA1 SHA512 SSDEEP

                F3A8.exe

                • Path C:\Users\Admin\AppData\Local\Temp\F3A8.exe
                • Size 347KB
                • SHA256 727f18733aa96b80ed4a42b4543d746230f8d3a0ac13931f8ca1935d3cd1c96d
                • MD5 SHA1 SHA512 SSDEEP

                F3A8.exe

                • Path C:\Users\Admin\AppData\Local\Temp\F3A8.exe
                • Size 347KB
                • SHA256 727f18733aa96b80ed4a42b4543d746230f8d3a0ac13931f8ca1935d3cd1c96d
                • MD5 SHA1 SHA512 SSDEEP

                Qytyaworpiotpd.tmp

                • Path C:\Users\Admin\AppData\Local\Temp\Qytyaworpiotpd.tmp
                • Size 752KB
                • SHA256 72021339c18f79141f9867c30616cbbdc517471e44d16bfe81063e5c7dba56c3
                • MD5 SHA1 SHA512 SSDEEP

                Qytyaworpiotpd.tmp

                • Path C:\Users\Admin\AppData\Local\Temp\Qytyaworpiotpd.tmp
                • Size 752KB
                • SHA256 72021339c18f79141f9867c30616cbbdc517471e44d16bfe81063e5c7dba56c3
                • MD5 SHA1 SHA512 SSDEEP

                memory/1540-153-0x00000173F0860000-0x00000173F09A0000-memory.dmp

                memory/1540-160-0x00000173F09E0000-0x00000173F0C9B000-memory.dmp

                memory/1540-156-0x00000000005A0000-0x000000000084A000-memory.dmp

                memory/1540-157-0x00000173F09E0000-0x00000173F0C9B000-memory.dmp

                memory/1540-155-0x00000173F0860000-0x00000173F09A0000-memory.dmp

                memory/2348-168-0x0000000000400000-0x000000000045C000-memory.dmp

                memory/2348-167-0x00000000006B0000-0x00000000006DA000-memory.dmp

                memory/2348-169-0x0000000000400000-0x000000000045C000-memory.dmp

                memory/2348-166-0x000000000076E000-0x0000000000788000-memory.dmp

                memory/3172-150-0x0000000004450000-0x0000000004590000-memory.dmp

                memory/3172-162-0x0000000006C75000-0x0000000006C77000-memory.dmp

                memory/3172-151-0x0000000004450000-0x0000000004590000-memory.dmp

                memory/3172-154-0x0000000006C75000-0x0000000006C77000-memory.dmp

                memory/3172-149-0x0000000006BA0000-0x0000000006CE0000-memory.dmp

                memory/3172-148-0x0000000006BA0000-0x0000000006CE0000-memory.dmp

                memory/3172-147-0x0000000004450000-0x0000000004590000-memory.dmp

                memory/3172-146-0x0000000004450000-0x0000000004590000-memory.dmp

                memory/3172-158-0x00000000049C0000-0x000000000551B000-memory.dmp

                memory/3172-145-0x00000000049C0000-0x000000000551B000-memory.dmp

                memory/4332-132-0x00000000004DE000-0x00000000004F3000-memory.dmp

                memory/4332-135-0x0000000000400000-0x0000000000458000-memory.dmp

                memory/4332-134-0x0000000000400000-0x0000000000458000-memory.dmp

                memory/4332-133-0x0000000002190000-0x0000000002199000-memory.dmp

                memory/5112-144-0x0000000000400000-0x0000000000525000-memory.dmp

                memory/5112-143-0x00000000022F0000-0x0000000002410000-memory.dmp

                memory/5112-142-0x0000000002105000-0x00000000021E6000-memory.dmp