Analysis

  • max time kernel
    150s
  • max time network
    127s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220901-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system
  • submitted
    11/11/2022, 00:43

General

  • Target
    file.exe
  • Size 371KB
  • Sample221111-a2w85afff5
  • SHA256 938ac3f9a57a840d6bcb51fb341f2e87f6cd08dd9b8fa3a0f329589ad2af1f93
  • 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
  • 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 5 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 48 IoCs

    Processor information is often read in order to detect sandboxing environments.

  • Modifies Internet Explorer settings 1 TTPs 4 IoCs
  • Modifies registry class 19 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 31 IoCs
  • Suspicious use of FindShellTrayWindow 1 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 26 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:3436
  • C:\Users\Admin\AppData\Local\Temp\32A9.exe
    C:\Users\Admin\AppData\Local\Temp\32A9.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • Checks processor information in registry
    • Suspicious use of WriteProcessMemory
    PID:368
    • C:\Windows\SysWOW64\rundll32.exe
      "C:\Windows\syswow64\rundll32.exe" "C:\Windows\syswow64\shell32.dll",#61
      2⤵
      • Blocklisted process makes network request
      PID:1644
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 368 -s 456
      2⤵
      • Program crash
      PID:4140
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 368 -s 948
      2⤵
      • Program crash
      PID:2820
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 368 -s 960
      2⤵
      • Program crash
      PID:3856
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 368 -s 1052
      2⤵
      • Program crash
      PID:4668
    • C:\Windows\SysWOW64\rundll32.exe
      "C:\Windows\syswow64\rundll32.exe" "C:\Windows\syswow64\shell32.dll",#61
      2⤵
      • Checks processor information in registry
      • Modifies registry class
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of FindShellTrayWindow
      PID:3476
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 368 -s 1060
      2⤵
      • Program crash
      PID:900
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 368 -ip 368
    1⤵
      PID:1704
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -pss -s 184 -p 368 -ip 368
      1⤵
        PID:5000
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 368 -ip 368
        1⤵
          PID:3644
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -pss -s 476 -p 368 -ip 368
          1⤵
            PID:3008
          • C:\Windows\SysWOW64\WerFault.exe
            C:\Windows\SysWOW64\WerFault.exe -pss -s 420 -p 368 -ip 368
            1⤵
              PID:2196

            Network

                  MITRE ATT&CK Enterprise v6

                  Replay Monitor

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                  Downloads

                  32A9.exe

                  • Path C:\Users\Admin\AppData\Local\Temp\32A9.exe
                  • Size 1.4MB
                  • SHA256 4e94b98199ecb75a5643e717eb06e53fbe3cd3abe53604b9f1adf5ee2c177f72
                  • MD5 SHA1 SHA512 SSDEEP

                  32A9.exe

                  • Path C:\Users\Admin\AppData\Local\Temp\32A9.exe
                  • Size 1.4MB
                  • SHA256 4e94b98199ecb75a5643e717eb06e53fbe3cd3abe53604b9f1adf5ee2c177f72
                  • MD5 SHA1 SHA512 SSDEEP

                  Ppihhitfqsu.tmp

                  • Path C:\Users\Admin\AppData\Local\Temp\Ppihhitfqsu.tmp
                  • Size 3.5MB
                  • SHA256 8f81545e6729d29ce074dd09d121627ce357a142b86ed102425a02b3bf25424b
                  • MD5 SHA1 SHA512 SSDEEP

                  memory/368-164-0x0000000003F90000-0x00000000040D0000-memory.dmp

                  memory/368-157-0x0000000003310000-0x0000000003E66000-memory.dmp

                  memory/368-176-0x0000000000400000-0x000000000096A000-memory.dmp

                  memory/368-139-0x0000000002626000-0x0000000002746000-memory.dmp

                  memory/368-140-0x0000000002750000-0x0000000002A16000-memory.dmp

                  memory/368-141-0x0000000000400000-0x000000000096A000-memory.dmp

                  memory/368-142-0x0000000000400000-0x000000000096A000-memory.dmp

                  memory/368-175-0x0000000003310000-0x0000000003E66000-memory.dmp

                  memory/368-165-0x0000000003F90000-0x00000000040D0000-memory.dmp

                  memory/368-163-0x0000000003F90000-0x00000000040D0000-memory.dmp

                  memory/368-155-0x0000000003310000-0x0000000003E66000-memory.dmp

                  memory/368-162-0x0000000003F90000-0x00000000040D0000-memory.dmp

                  memory/368-161-0x0000000003F90000-0x00000000040D0000-memory.dmp

                  memory/368-160-0x0000000003F90000-0x00000000040D0000-memory.dmp

                  memory/368-159-0x0000000003F90000-0x00000000040D0000-memory.dmp

                  memory/368-151-0x0000000000400000-0x000000000096A000-memory.dmp

                  memory/368-158-0x0000000003F90000-0x00000000040D0000-memory.dmp

                  memory/368-156-0x0000000003310000-0x0000000003E66000-memory.dmp

                  memory/1644-146-0x0000000000800000-0x0000000000804000-memory.dmp

                  memory/1644-144-0x00000000005E0000-0x00000000005E4000-memory.dmp

                  memory/1644-153-0x0000000000840000-0x0000000000844000-memory.dmp

                  memory/1644-152-0x0000000000840000-0x0000000000844000-memory.dmp

                  memory/1644-150-0x0000000000840000-0x0000000000844000-memory.dmp

                  memory/1644-149-0x0000000000830000-0x0000000000834000-memory.dmp

                  memory/1644-148-0x0000000000820000-0x0000000000824000-memory.dmp

                  memory/1644-147-0x0000000000810000-0x0000000000814000-memory.dmp

                  memory/1644-145-0x00000000005F0000-0x00000000005F4000-memory.dmp

                  memory/3436-132-0x000000000095B000-0x0000000000970000-memory.dmp

                  memory/3436-133-0x00000000008E0000-0x00000000008E9000-memory.dmp

                  memory/3436-135-0x0000000000400000-0x000000000085F000-memory.dmp

                  memory/3436-134-0x0000000000400000-0x000000000085F000-memory.dmp

                  memory/3476-167-0x00000000030E0000-0x0000000003C36000-memory.dmp

                  memory/3476-169-0x0000000000F50000-0x0000000001986000-memory.dmp

                  memory/3476-170-0x0000000003D00000-0x0000000003E40000-memory.dmp

                  memory/3476-168-0x0000000003D00000-0x0000000003E40000-memory.dmp

                  memory/3476-171-0x00000000030E0000-0x0000000003C36000-memory.dmp

                  memory/3476-172-0x0000000003D00000-0x0000000003E40000-memory.dmp

                  memory/3476-173-0x0000000003D00000-0x0000000003E40000-memory.dmp

                  memory/3476-174-0x00000000030E0000-0x0000000003C36000-memory.dmp