Analysis

  • max time kernel
    150s
  • 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
    22/01/2023, 23:39

General

  • Target
    file.exe
  • Size 194KB
  • Sample230122-3m96nacb2w
  • SHA256 cc9dfbfd2fde476496058e07b74943b3bb268fdcb544872dd38d9203b4798a9f
  • 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 2 IoCs
  • Loads dropped DLL 1 IoCs
  • 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 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 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 20 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:4700
  • C:\Users\Admin\AppData\Local\Temp\F3EA.exe
    C:\Users\Admin\AppData\Local\Temp\F3EA.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of WriteProcessMemory
    PID:1596
    • C:\Windows\SysWOW64\rundll32.exe
      C:\Windows\system32\rundll32.exe C:\Users\Admin\AppData\Local\Temp\Qdwywhepeywaes.dll,start
      2⤵
      • Blocklisted process makes network request
      • Loads dropped DLL
      • Suspicious use of SetThreadContext
      • Checks processor information in registry
      • Suspicious use of WriteProcessMemory
      PID:4900
      • C:\Windows\system32\rundll32.exe
        "C:\Windows\system32\rundll32.exe" "C:\Windows\system32\shell32.dll",#61 30672
        3⤵
        • Modifies registry class
        • Suspicious use of FindShellTrayWindow
        PID:4656
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 1596 -s 480
      2⤵
      • Program crash
      PID:2864
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 1596 -ip 1596
    1⤵
      PID:4456
    • C:\Users\Admin\AppData\Roaming\dfvgewf
      C:\Users\Admin\AppData\Roaming\dfvgewf
      1⤵
      • Executes dropped EXE
      • Checks SCSI registry key(s)
      • Suspicious behavior: MapViewOfSection
      PID:3164
    • C:\Windows\System32\rundll32.exe
      C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
      1⤵
        PID:4208

      Network

            MITRE ATT&CK Enterprise v6

            Replay Monitor

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            Downloads

            F3EA.exe

            • Path C:\Users\Admin\AppData\Local\Temp\F3EA.exe
            • Size 3.6MB
            • SHA256 f7c5377725d03b35868dfaa54bd2af6b2bb36456acb9ee7033c666b0fbedfe83
            • MD5 SHA1 SHA512 SSDEEP

            F3EA.exe

            • Path C:\Users\Admin\AppData\Local\Temp\F3EA.exe
            • Size 3.6MB
            • SHA256 f7c5377725d03b35868dfaa54bd2af6b2bb36456acb9ee7033c666b0fbedfe83
            • MD5 SHA1 SHA512 SSDEEP

            Qdwywhepeywaes.dll

            • Path C:\Users\Admin\AppData\Local\Temp\Qdwywhepeywaes.dll
            • Size 4.3MB
            • SHA256 b4af99c82a95492e7982ad4fac6781dd5669a5c918b88003f202c0e2b2466856
            • MD5 SHA1 SHA512 SSDEEP

            Qdwywhepeywaes.dll

            • Path C:\Users\Admin\AppData\Local\Temp\Qdwywhepeywaes.dll
            • Size 4.3MB
            • SHA256 b4af99c82a95492e7982ad4fac6781dd5669a5c918b88003f202c0e2b2466856
            • MD5 SHA1 SHA512 SSDEEP

            dfvgewf

            • Path C:\Users\Admin\AppData\Roaming\dfvgewf
            • Size 194KB
            • SHA256 cc9dfbfd2fde476496058e07b74943b3bb268fdcb544872dd38d9203b4798a9f
            • MD5 SHA1 SHA512 SSDEEP

            dfvgewf

            • Path C:\Users\Admin\AppData\Roaming\dfvgewf
            • Size 194KB
            • SHA256 cc9dfbfd2fde476496058e07b74943b3bb268fdcb544872dd38d9203b4798a9f
            • MD5 SHA1 SHA512 SSDEEP

            memory/1596-146-0x0000000000400000-0x0000000002F0B000-memory.dmp

            memory/1596-140-0x0000000004EB0000-0x0000000005392000-memory.dmp

            memory/1596-141-0x0000000000400000-0x0000000002F0B000-memory.dmp

            memory/1596-139-0x0000000004B2D000-0x0000000004EAF000-memory.dmp

            memory/3164-154-0x0000000000400000-0x0000000002B9B000-memory.dmp

            memory/3164-153-0x0000000002DEB000-0x0000000002DFE000-memory.dmp

            memory/3164-157-0x0000000000400000-0x0000000002B9B000-memory.dmp

            memory/4656-166-0x0000000000C90000-0x0000000000F2D000-memory.dmp

            memory/4656-165-0x00000290C4990000-0x00000290C4AD0000-memory.dmp

            memory/4656-167-0x00000290C2F40000-0x00000290C31EF000-memory.dmp

            memory/4656-164-0x00000290C4990000-0x00000290C4AD0000-memory.dmp

            memory/4656-169-0x00000290C2F40000-0x00000290C31EF000-memory.dmp

            memory/4700-134-0x0000000000400000-0x0000000002B9B000-memory.dmp

            memory/4700-135-0x0000000000400000-0x0000000002B9B000-memory.dmp

            memory/4700-132-0x0000000002D2B000-0x0000000002D3E000-memory.dmp

            memory/4700-133-0x0000000002CF0000-0x0000000002CF9000-memory.dmp

            memory/4900-150-0x0000000003910000-0x0000000004486000-memory.dmp

            memory/4900-156-0x0000000004550000-0x0000000004690000-memory.dmp

            memory/4900-158-0x0000000004550000-0x0000000004690000-memory.dmp

            memory/4900-159-0x0000000004550000-0x0000000004690000-memory.dmp

            memory/4900-160-0x0000000004550000-0x0000000004690000-memory.dmp

            memory/4900-161-0x0000000004550000-0x0000000004690000-memory.dmp

            memory/4900-155-0x0000000004550000-0x0000000004690000-memory.dmp

            memory/4900-163-0x00000000045C9000-0x00000000045CB000-memory.dmp

            memory/4900-152-0x0000000003910000-0x0000000004486000-memory.dmp

            memory/4900-151-0x0000000003910000-0x0000000004486000-memory.dmp

            memory/4900-147-0x0000000000400000-0x0000000000850000-memory.dmp

            memory/4900-145-0x0000000000400000-0x0000000000850000-memory.dmp

            memory/4900-168-0x0000000003910000-0x0000000004486000-memory.dmp