Analysis

  • max time kernel
    151s
  • max time network
    131s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220812-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
  • submitted
    05/11/2022, 05:41

General

  • Target
    file.exe
  • Size 285KB
  • Sample221105-gde39seae9
  • SHA256 9174d0e4f9da37ff45e7c811238cf4e0f2a287d45860ba77a46b5d93e8fe5f8a
  • 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
  • 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 6 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 44 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 32 IoCs
  • Suspicious use of FindShellTrayWindow 1 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 37 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:4616
  • C:\Users\Admin\AppData\Local\Temp\E12D.exe
    C:\Users\Admin\AppData\Local\Temp\E12D.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • Checks processor information in registry
    • Suspicious use of WriteProcessMemory
    PID:4960
    • C:\Windows\SysWOW64\rundll32.exe
      "C:\Windows\syswow64\rundll32.exe" "C:\Windows\syswow64\shell32.dll",#61
      2⤵
      • Blocklisted process makes network request
      PID:3252
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 4960 -s 616
      2⤵
      • Program crash
      PID:2960
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 4960 -s 1000
      2⤵
      • Program crash
      PID:2096
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 4960 -s 1000
      2⤵
      • Program crash
      PID:4660
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 4960 -s 1060
      2⤵
      • Program crash
      PID:3412
    • 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 FindShellTrayWindow
      PID:2396
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 4960 -s 1064
      2⤵
      • Program crash
      PID:852
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 4960 -s 1132
      2⤵
      • Program crash
      PID:3376
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 4960 -ip 4960
    1⤵
      PID:2428
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -pss -s 436 -p 4960 -ip 4960
      1⤵
        PID:1324
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 496 -p 4960 -ip 4960
        1⤵
          PID:3968
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -pss -s 488 -p 4960 -ip 4960
          1⤵
            PID:2896
          • C:\Windows\SysWOW64\WerFault.exe
            C:\Windows\SysWOW64\WerFault.exe -pss -s 360 -p 4960 -ip 4960
            1⤵
              PID:1288
            • C:\Windows\SysWOW64\WerFault.exe
              C:\Windows\SysWOW64\WerFault.exe -pss -s 416 -p 4960 -ip 4960
              1⤵
                PID:3912

              Network

                    MITRE ATT&CK Enterprise v6

                    Replay Monitor

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                    Downloads

                    E12D.exe

                    • Path C:\Users\Admin\AppData\Local\Temp\E12D.exe
                    • Size 1.3MB
                    • SHA256 7e44b50da7c6ef3604c42ec381d7570fd01a18d1efb9e029f9b9a801b128527f
                    • MD5 SHA1 SHA512 SSDEEP

                    E12D.exe

                    • Path C:\Users\Admin\AppData\Local\Temp\E12D.exe
                    • Size 1.3MB
                    • SHA256 7e44b50da7c6ef3604c42ec381d7570fd01a18d1efb9e029f9b9a801b128527f
                    • MD5 SHA1 SHA512 SSDEEP

                    Wffwew.tmp

                    • Path C:\Users\Admin\AppData\Local\Temp\Wffwew.tmp
                    • Size 3.5MB
                    • SHA256 bcdf4c540c4289f81c98448d0a4482a96522fb767ab6015e76288afce148226a
                    • MD5 SHA1 SHA512 SSDEEP

                    memory/2396-167-0x0000000000B20000-0x0000000001560000-memory.dmp

                    memory/2396-165-0x0000000003690000-0x00000000037D0000-memory.dmp

                    memory/2396-164-0x0000000002A70000-0x00000000035D0000-memory.dmp

                    memory/2396-168-0x0000000002A70000-0x00000000035D0000-memory.dmp

                    memory/2396-169-0x0000000002A70000-0x00000000035D0000-memory.dmp

                    memory/2396-166-0x0000000003690000-0x00000000037D0000-memory.dmp

                    memory/3252-145-0x0000000000170000-0x0000000000173000-memory.dmp

                    memory/3252-146-0x0000000000190000-0x0000000000193000-memory.dmp

                    memory/3252-147-0x0000000000180000-0x0000000000183000-memory.dmp

                    memory/3252-148-0x0000000000190000-0x0000000000193000-memory.dmp

                    memory/4616-133-0x00000000008C0000-0x00000000008C9000-memory.dmp

                    memory/4616-134-0x0000000000400000-0x000000000084A000-memory.dmp

                    memory/4616-135-0x0000000000400000-0x000000000084A000-memory.dmp

                    memory/4616-132-0x0000000000A89000-0x0000000000A9F000-memory.dmp

                    memory/4960-152-0x00000000031F0000-0x0000000003D50000-memory.dmp

                    memory/4960-162-0x0000000003F50000-0x0000000004090000-memory.dmp

                    memory/4960-153-0x00000000031F0000-0x0000000003D50000-memory.dmp

                    memory/4960-154-0x00000000031F0000-0x0000000003D50000-memory.dmp

                    memory/4960-156-0x0000000003F50000-0x0000000004090000-memory.dmp

                    memory/4960-155-0x0000000003F50000-0x0000000004090000-memory.dmp

                    memory/4960-157-0x0000000003F50000-0x0000000004090000-memory.dmp

                    memory/4960-158-0x0000000003F50000-0x0000000004090000-memory.dmp

                    memory/4960-159-0x0000000003F50000-0x0000000004090000-memory.dmp

                    memory/4960-160-0x0000000003F50000-0x0000000004090000-memory.dmp

                    memory/4960-161-0x0000000003F50000-0x0000000004090000-memory.dmp

                    memory/4960-150-0x0000000000400000-0x0000000000957000-memory.dmp

                    memory/4960-149-0x0000000000400000-0x0000000000957000-memory.dmp

                    memory/4960-143-0x0000000000400000-0x0000000000957000-memory.dmp

                    memory/4960-142-0x0000000000400000-0x0000000000957000-memory.dmp

                    memory/4960-141-0x0000000002710000-0x00000000029DC000-memory.dmp

                    memory/4960-140-0x00000000024E7000-0x0000000002609000-memory.dmp

                    memory/4960-139-0x0000000000400000-0x0000000000957000-memory.dmp

                    memory/4960-170-0x0000000000400000-0x0000000000957000-memory.dmp

                    memory/4960-171-0x00000000031F0000-0x0000000003D50000-memory.dmp