Analysis

  • max time kernel
    150s
  • max time network
    154s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220901-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system
  • submitted
    22/12/2022, 22:29

General

  • Target
    file.exe
  • Size 316KB
  • Sample221222-2d749sfd37
  • SHA256 180e11790ebe78432f068176dc8bede2d0818f3cb9258d8760c908d05fea39cc
  • 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
  • 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 6 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 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 18 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:1720
  • C:\Users\Admin\AppData\Local\Temp\1F7E.exe
    C:\Users\Admin\AppData\Local\Temp\1F7E.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of WriteProcessMemory
    PID:1960
    • C:\Windows\SysWOW64\rundll32.exe
      "C:\Windows\system32\rundll32.exe" "C:\Users\Admin\AppData\Local\Temp\Oyiesauffusw.tmp",Wuuitfqhpt
      2⤵
      • Blocklisted process makes network request
      • Loads dropped DLL
      • Suspicious use of SetThreadContext
      • Checks processor information in registry
      • Suspicious use of WriteProcessMemory
      PID:4700
      • C:\Windows\system32\rundll32.exe
        "C:\Windows\system32\rundll32.exe" "C:\Windows\system32\shell32.dll",#61 17153
        3⤵
        • Modifies registry class
        • Suspicious use of FindShellTrayWindow
        PID:4240
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 1960 -s 540
      2⤵
      • Program crash
      PID:3636
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 460 -p 1960 -ip 1960
    1⤵
      PID:4224
    • C:\Users\Admin\AppData\Roaming\sdhargu
      C:\Users\Admin\AppData\Roaming\sdhargu
      1⤵
      • Executes dropped EXE
      • Checks SCSI registry key(s)
      • Suspicious behavior: MapViewOfSection
      PID:4128
    • C:\Windows\System32\rundll32.exe
      C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
      1⤵
        PID:1536

      Network

            MITRE ATT&CK Enterprise v6

            Replay Monitor

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            Downloads

            1F7E.exe

            • Path C:\Users\Admin\AppData\Local\Temp\1F7E.exe
            • Size 1.1MB
            • SHA256 d12e6a159d37fe10801fb4136ef450b20d498fd1591205b17d8455f4638df3d5
            • MD5 SHA1 SHA512 SSDEEP

            1F7E.exe

            • Path C:\Users\Admin\AppData\Local\Temp\1F7E.exe
            • Size 1.1MB
            • SHA256 d12e6a159d37fe10801fb4136ef450b20d498fd1591205b17d8455f4638df3d5
            • MD5 SHA1 SHA512 SSDEEP

            Oyiesauffusw.tmp

            • Path C:\Users\Admin\AppData\Local\Temp\Oyiesauffusw.tmp
            • Size 730KB
            • SHA256 5cb8e52b000f84494627db8e8e700e7731c9bfa2eb9e6a8a8280d2311327e81a
            • MD5 SHA1 SHA512 SSDEEP

            Oyiesauffusw.tmp

            • Path C:\Users\Admin\AppData\Local\Temp\Oyiesauffusw.tmp
            • Size 730KB
            • SHA256 5cb8e52b000f84494627db8e8e700e7731c9bfa2eb9e6a8a8280d2311327e81a
            • MD5 SHA1 SHA512 SSDEEP

            sdhargu

            • Path C:\Users\Admin\AppData\Roaming\sdhargu
            • Size 316KB
            • SHA256 180e11790ebe78432f068176dc8bede2d0818f3cb9258d8760c908d05fea39cc
            • MD5 SHA1 SHA512 SSDEEP

            sdhargu

            • Path C:\Users\Admin\AppData\Roaming\sdhargu
            • Size 316KB
            • SHA256 180e11790ebe78432f068176dc8bede2d0818f3cb9258d8760c908d05fea39cc
            • MD5 SHA1 SHA512 SSDEEP

            memory/1720-132-0x000000000065F000-0x0000000000675000-memory.dmp

            memory/1720-133-0x0000000000600000-0x0000000000609000-memory.dmp

            memory/1720-134-0x0000000000400000-0x0000000000455000-memory.dmp

            memory/1720-135-0x0000000000400000-0x0000000000455000-memory.dmp

            memory/1960-143-0x00000000022E0000-0x00000000023FC000-memory.dmp

            memory/1960-144-0x0000000000400000-0x000000000051F000-memory.dmp

            memory/1960-142-0x000000000214A000-0x0000000002227000-memory.dmp

            memory/4128-161-0x0000000000400000-0x0000000000455000-memory.dmp

            memory/4128-160-0x00000000006CE000-0x00000000006E3000-memory.dmp

            memory/4128-163-0x0000000000400000-0x0000000000455000-memory.dmp

            memory/4240-156-0x00000263A11D0000-0x00000263A1310000-memory.dmp

            memory/4240-158-0x0000000000480000-0x000000000071A000-memory.dmp

            memory/4240-159-0x000002639F910000-0x000002639FBBC000-memory.dmp

            memory/4240-157-0x00000263A11D0000-0x00000263A1310000-memory.dmp

            memory/4700-154-0x0000000004740000-0x0000000004880000-memory.dmp

            memory/4700-153-0x0000000004740000-0x0000000004880000-memory.dmp

            memory/4700-147-0x0000000004740000-0x0000000004880000-memory.dmp

            memory/4700-152-0x0000000004D70000-0x0000000004EB0000-memory.dmp

            memory/4700-151-0x0000000004D70000-0x0000000004EB0000-memory.dmp

            memory/4700-148-0x0000000004740000-0x0000000004880000-memory.dmp

            memory/4700-146-0x0000000006220000-0x0000000006D82000-memory.dmp

            memory/4700-145-0x0000000006220000-0x0000000006D82000-memory.dmp

            memory/4700-162-0x0000000006220000-0x0000000006D82000-memory.dmp