Analysis

  • max time kernel
    151s
  • max time network
    152s
  • 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, 12:36

General

  • Target
    file.exe
  • Size 286KB
  • Sample221105-psxkvsfgg5
  • SHA256 e3d5762c646dbcb51527f36e67495cfbbdb4805b0cbcbe526cb24a581d2a6eb3
  • 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 4 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 46 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 28 IoCs
  • Suspicious use of FindShellTrayWindow 1 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 33 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:1932
  • C:\Users\Admin\AppData\Local\Temp\16D4.exe
    C:\Users\Admin\AppData\Local\Temp\16D4.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • Checks processor information in registry
    • Suspicious use of WriteProcessMemory
    PID:640
    • C:\Windows\SysWOW64\rundll32.exe
      "C:\Windows\syswow64\rundll32.exe" "C:\Windows\syswow64\shell32.dll",#61
      2⤵
      • Blocklisted process makes network request
      PID:3588
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 640 -s 616
      2⤵
      • Program crash
      PID:4996
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 640 -s 944
      2⤵
      • Program crash
      PID:1876
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 640 -s 1000
      2⤵
      • Program crash
      PID:2104
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 640 -s 1060
      2⤵
      • Program crash
      PID:4320
    • 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:2200
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 640 -ip 640
    1⤵
      PID:3304
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -pss -s 468 -p 640 -ip 640
      1⤵
        PID:4836
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 184 -p 640 -ip 640
        1⤵
          PID:4304
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -pss -s 556 -p 640 -ip 640
          1⤵
            PID:756

          Network

                MITRE ATT&CK Enterprise v6

                Replay Monitor

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                Downloads

                16D4.exe

                • Path C:\Users\Admin\AppData\Local\Temp\16D4.exe
                • Size 1.3MB
                • SHA256 9feafb379bcaf62e49cbad3127dc92b7e05ef23af2275ebbd17c575f66df4e49
                • MD5 SHA1 SHA512 SSDEEP

                16D4.exe

                • Path C:\Users\Admin\AppData\Local\Temp\16D4.exe
                • Size 1.3MB
                • SHA256 9feafb379bcaf62e49cbad3127dc92b7e05ef23af2275ebbd17c575f66df4e49
                • 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/640-171-0x0000000004060000-0x00000000041A0000-memory.dmp

                memory/640-170-0x0000000004060000-0x00000000041A0000-memory.dmp

                memory/640-167-0x0000000004060000-0x00000000041A0000-memory.dmp

                memory/640-166-0x0000000003270000-0x0000000003DD0000-memory.dmp

                memory/640-139-0x000000000268F000-0x00000000027B1000-memory.dmp

                memory/640-141-0x00000000027C0000-0x0000000002A8C000-memory.dmp

                memory/640-140-0x0000000000400000-0x0000000000957000-memory.dmp

                memory/640-142-0x0000000000400000-0x0000000000957000-memory.dmp

                memory/640-143-0x0000000000400000-0x0000000000957000-memory.dmp

                memory/640-185-0x0000000003270000-0x0000000003DD0000-memory.dmp

                memory/640-165-0x0000000003270000-0x0000000003DD0000-memory.dmp

                memory/640-184-0x0000000000400000-0x0000000000957000-memory.dmp

                memory/640-164-0x0000000003270000-0x0000000003DD0000-memory.dmp

                memory/640-162-0x0000000000400000-0x0000000000957000-memory.dmp

                memory/640-169-0x0000000004060000-0x00000000041A0000-memory.dmp

                memory/640-168-0x0000000004060000-0x00000000041A0000-memory.dmp

                memory/640-172-0x0000000004060000-0x00000000041A0000-memory.dmp

                memory/640-173-0x0000000004060000-0x00000000041A0000-memory.dmp

                memory/640-174-0x0000000004060000-0x00000000041A0000-memory.dmp

                memory/1932-134-0x0000000000400000-0x000000000084A000-memory.dmp

                memory/1932-135-0x0000000000400000-0x000000000084A000-memory.dmp

                memory/1932-132-0x0000000000A29000-0x0000000000A3F000-memory.dmp

                memory/1932-133-0x00000000008C0000-0x00000000008C9000-memory.dmp

                memory/2200-178-0x0000000003680000-0x00000000037C0000-memory.dmp

                memory/2200-182-0x0000000003680000-0x00000000037C0000-memory.dmp

                memory/2200-180-0x0000000002B20000-0x0000000003680000-memory.dmp

                memory/2200-177-0x0000000003680000-0x00000000037C0000-memory.dmp

                memory/2200-183-0x0000000002B20000-0x0000000003680000-memory.dmp

                memory/2200-179-0x0000000000B40000-0x0000000001580000-memory.dmp

                memory/2200-181-0x0000000003680000-0x00000000037C0000-memory.dmp

                memory/2200-176-0x0000000002B20000-0x0000000003680000-memory.dmp

                memory/3588-145-0x0000000000730000-0x0000000000734000-memory.dmp

                memory/3588-161-0x0000000000A20000-0x0000000000A24000-memory.dmp

                memory/3588-160-0x0000000000A20000-0x0000000000A24000-memory.dmp

                memory/3588-159-0x0000000000A10000-0x0000000000A14000-memory.dmp

                memory/3588-158-0x0000000000A00000-0x0000000000A04000-memory.dmp

                memory/3588-157-0x00000000007F0000-0x00000000007F4000-memory.dmp

                memory/3588-156-0x00000000007E0000-0x00000000007E4000-memory.dmp

                memory/3588-154-0x00000000007C0000-0x00000000007C4000-memory.dmp

                memory/3588-155-0x00000000007D0000-0x00000000007D4000-memory.dmp

                memory/3588-153-0x00000000007B0000-0x00000000007B4000-memory.dmp

                memory/3588-152-0x00000000007A0000-0x00000000007A4000-memory.dmp

                memory/3588-151-0x0000000000790000-0x0000000000794000-memory.dmp

                memory/3588-150-0x0000000000780000-0x0000000000784000-memory.dmp

                memory/3588-149-0x0000000000770000-0x0000000000774000-memory.dmp

                memory/3588-148-0x0000000000760000-0x0000000000764000-memory.dmp

                memory/3588-147-0x0000000000750000-0x0000000000754000-memory.dmp

                memory/3588-146-0x0000000000740000-0x0000000000744000-memory.dmp