Analysis

  • max time kernel
    147s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220812-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
  • submitted
    20/01/2023, 00:32

General

  • Target
    file.exe
  • Size 192KB
  • Sample230120-avmfcaeg21
  • SHA256 44e119230ae24d7852d040b374463993437a5d589b8d851fd7be76fbefca9f50
  • 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
  • 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 22 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 16 IoCs
  • Suspicious use of FindShellTrayWindow 1 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 9 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:2400
  • C:\Users\Admin\AppData\Local\Temp\C77B.exe
    C:\Users\Admin\AppData\Local\Temp\C77B.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of WriteProcessMemory
    PID:308
    • C:\Windows\SysWOW64\rundll32.exe
      "C:\Windows\system32\rundll32.exe" "C:\Users\Admin\AppData\Local\Temp\Thhqeqq.tmp",Yeytaeyds
      2⤵
      • Blocklisted process makes network request
      • Loads dropped DLL
      • Suspicious use of SetThreadContext
      • Checks processor information in registry
      • Suspicious use of WriteProcessMemory
      PID:2432
      • C:\Windows\system32\rundll32.exe
        "C:\Windows\system32\rundll32.exe" "C:\Windows\system32\shell32.dll",#61 13819
        3⤵
        • Modifies registry class
        • Suspicious use of FindShellTrayWindow
        PID:1480
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 308 -s 528
      2⤵
      • Program crash
      PID:3740
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 452 -p 308 -ip 308
    1⤵
      PID:872
    • C:\Windows\System32\rundll32.exe
      C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
      1⤵
        PID:3304
      • C:\Windows\SysWOW64\svchost.exe
        C:\Windows\SysWOW64\svchost.exe -k LocalService
        1⤵
          PID:3588
          • C:\Windows\SysWOW64\rundll32.exe
            "C:\Windows\system32\rundll32.exe" "c:\program files (x86)\google\update\pddom.dll",KyUGbnJaUEg=
            2⤵
              PID:4320

          Network

                MITRE ATT&CK Enterprise v6

                Replay Monitor

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                Downloads

                PDDom.dll

                • Path C:\Program Files (x86)\Google\Update\PDDom.dll
                • Size 762KB
                • SHA256 f6d6919914ba84b428ed9ba0cfb59cb437eec479ad02f82bd29e58482aff28a5
                • MD5 SHA1 SHA512 SSDEEP

                PDDom.dll

                • Path C:\Program Files (x86)\Google\Update\PDDom.dll
                • Size 762KB
                • SHA256 f6d6919914ba84b428ed9ba0cfb59cb437eec479ad02f82bd29e58482aff28a5
                • MD5 SHA1 SHA512 SSDEEP

                CiST0000.002

                • Path C:\ProgramData\{20975B9B-A8E0-9ADF-1023-6C9A2360079C}\CiST0000.002
                • Size 64KB
                • SHA256 c792c4e853db7add4707ca53602f6fc82db515f472238d7633603bd6b42f4cc8
                • MD5 SHA1 SHA512 SSDEEP

                Microsoft.BingWeather_4.25.20211.0_neutral_split.scale-150_8wekyb3d8bbwe.xml

                • Path C:\ProgramData\{20975B9B-A8E0-9ADF-1023-6C9A2360079C}\Microsoft.BingWeather_4.25.20211.0_neutral_split.scale-150_8wekyb3d8bbwe.xml
                • Size 849B
                • SHA256 40d6a0b80770bf41ddc0a3b3607ac53eb82d0f90675e5a595a18cd3f8bdf3d94
                • MD5 SHA1 SHA512

                Microsoft.GetHelp_10.1706.13331.0_neutral_split.scale-100_8wekyb3d8bbwe.xml

                • Path C:\ProgramData\{20975B9B-A8E0-9ADF-1023-6C9A2360079C}\Microsoft.GetHelp_10.1706.13331.0_neutral_split.scale-100_8wekyb3d8bbwe.xml
                • Size 820B
                • SHA256 a8ed53b828f69fb5e6e28eef9a38b5753320aa7a942b4a4c2dbf67705d21e309
                • MD5 SHA1 SHA512

                Tqeowahqrywaui.tmp

                • Path C:\ProgramData\{20975B9B-A8E0-9ADF-1023-6C9A2360079C}\Tqeowahqrywaui.tmp
                • Size 3.5MB
                • SHA256 db1d17f5416904b85302248cf58eabee33619e9ced5ba8b73bdf65d55b19ff46
                • MD5 SHA1 SHA512 SSDEEP

                device.png

                • Path C:\ProgramData\{20975B9B-A8E0-9ADF-1023-6C9A2360079C}\device.png
                • Size 43KB
                • SHA256 609824cc9c4f6c26c529ea3eb6f112c1a7c74d5ed58e25b6f9d88dce5944626a
                • MD5 SHA1 SHA512 SSDEEP

                scan_settings.ico

                • Path C:\ProgramData\{20975B9B-A8E0-9ADF-1023-6C9A2360079C}\scan_settings.ico
                • Size 62KB
                • SHA256 d660f44fb7efbfdcec4cba821fea1be0977e3f66cc709b313edf9ead575994a5
                • MD5 SHA1 SHA512 SSDEEP

                C77B.exe

                • Path C:\Users\Admin\AppData\Local\Temp\C77B.exe
                • Size 1.0MB
                • SHA256 481466edf5d82788ec20a2c786d49d7fedd8518c56d5214ce93c83b9d8733950
                • MD5 SHA1 SHA512 SSDEEP

                C77B.exe

                • Path C:\Users\Admin\AppData\Local\Temp\C77B.exe
                • Size 1.0MB
                • SHA256 481466edf5d82788ec20a2c786d49d7fedd8518c56d5214ce93c83b9d8733950
                • MD5 SHA1 SHA512 SSDEEP

                Thhqeqq.tmp

                • Path C:\Users\Admin\AppData\Local\Temp\Thhqeqq.tmp
                • Size 762KB
                • SHA256 fdafcea4a906ec7204c7b6991ca6c9640c9a54f1679bc1df6684f6716cef56ef
                • MD5 SHA1 SHA512 SSDEEP

                Thhqeqq.tmp

                • Path C:\Users\Admin\AppData\Local\Temp\Thhqeqq.tmp
                • Size 762KB
                • SHA256 fdafcea4a906ec7204c7b6991ca6c9640c9a54f1679bc1df6684f6716cef56ef
                • MD5 SHA1 SHA512 SSDEEP

                pddom.dll

                • Path \??\c:\program files (x86)\google\update\pddom.dll
                • Size 762KB
                • SHA256 f6d6919914ba84b428ed9ba0cfb59cb437eec479ad02f82bd29e58482aff28a5
                • MD5 SHA1 SHA512 SSDEEP

                memory/308-144-0x0000000000400000-0x0000000002C6C000-memory.dmp

                memory/308-141-0x0000000004A30000-0x0000000004B56000-memory.dmp

                memory/308-139-0x000000000493F000-0x0000000004A23000-memory.dmp

                memory/1480-154-0x0000016B7EC60000-0x0000016B7EDA0000-memory.dmp

                memory/1480-155-0x0000016B7EC60000-0x0000016B7EDA0000-memory.dmp

                memory/1480-156-0x0000000000F50000-0x00000000011EF000-memory.dmp

                memory/1480-157-0x0000016B7D210000-0x0000016B7D4C0000-memory.dmp

                memory/2400-134-0x0000000000400000-0x0000000002B9A000-memory.dmp

                memory/2400-133-0x0000000002CE0000-0x0000000002CE9000-memory.dmp

                memory/2400-132-0x0000000002F3F000-0x0000000002F52000-memory.dmp

                memory/2400-135-0x0000000000400000-0x0000000002B9A000-memory.dmp

                memory/2432-152-0x0000000005580000-0x00000000056C0000-memory.dmp

                memory/2432-151-0x0000000005580000-0x00000000056C0000-memory.dmp

                memory/2432-150-0x0000000005580000-0x00000000056C0000-memory.dmp

                memory/2432-158-0x0000000004940000-0x00000000054BC000-memory.dmp

                memory/2432-149-0x0000000005580000-0x00000000056C0000-memory.dmp

                memory/2432-148-0x0000000005580000-0x00000000056C0000-memory.dmp

                memory/2432-147-0x0000000005580000-0x00000000056C0000-memory.dmp

                memory/2432-146-0x0000000004940000-0x00000000054BC000-memory.dmp

                memory/2432-145-0x0000000004940000-0x00000000054BC000-memory.dmp

                memory/3588-162-0x0000000003D00000-0x000000000487C000-memory.dmp

                memory/3588-171-0x0000000003D00000-0x000000000487C000-memory.dmp

                memory/4320-170-0x0000000004C40000-0x00000000057BC000-memory.dmp