Analysis

  • max time kernel
    150s
  • max time network
    139s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220812-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
  • submitted
    02/11/2022, 17:10

General

  • Target
    file.exe
  • Size 321KB
  • Sample221102-vppzhadaam
  • SHA256 7f6ea9338a4b68eb6283ddae937631094fef9cff02765f724f6e9accf69ab726
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Signatures

  • Detects Smokeloader packer 1 IoCs
  • SmokeLoader

    Modular backdoor trojan in use since 2014.

  • 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 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 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 34 IoCs
  • Suspicious use of FindShellTrayWindow 1 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 7 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:3364
  • C:\Users\Admin\AppData\Local\Temp\F1D7.exe
    C:\Users\Admin\AppData\Local\Temp\F1D7.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • Checks processor information in registry
    • Suspicious use of WriteProcessMemory
    PID:456
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 456 -s 824
      2⤵
      • Program crash
      PID:2484
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 456 -s 868
      2⤵
      • Program crash
      PID:3512
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 456 -s 872
      2⤵
      • Program crash
      PID:332
    • 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:4996
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 456 -s 872
      2⤵
      • Program crash
      PID:1932
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 360 -p 456 -ip 456
    1⤵
      PID:5088
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -pss -s 420 -p 456 -ip 456
      1⤵
        PID:4460
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 536 -p 456 -ip 456
        1⤵
          PID:3248
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -pss -s 552 -p 456 -ip 456
          1⤵
            PID:3524

          Network

                MITRE ATT&CK Enterprise v6

                Replay Monitor

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                Downloads

                F1D7.exe

                • Path C:\Users\Admin\AppData\Local\Temp\F1D7.exe
                • Size 4.9MB
                • SHA256 067353f5fd94046bea45e9ed171fd668f8266e1a8443bd4a7ef9b8ee8f4c38b9
                • MD5 SHA1 SHA512 SSDEEP

                F1D7.exe

                • Path C:\Users\Admin\AppData\Local\Temp\F1D7.exe
                • Size 4.9MB
                • SHA256 067353f5fd94046bea45e9ed171fd668f8266e1a8443bd4a7ef9b8ee8f4c38b9
                • MD5 SHA1 SHA512 SSDEEP

                Rpiidpytrto.tmp

                • Path C:\Users\Admin\AppData\Local\Temp\Rpiidpytrto.tmp
                • Size 3.5MB
                • SHA256 8c67a70fe070595fda6ec977af7da0085d40df299f04cdd5669156752fee3f31
                • MD5 SHA1 SHA512 SSDEEP

                sa.9NCBCSZSJRSB_0__.Public.InstallAgent.dat

                • Path C:\Users\Admin\AppData\Local\Temp\sa.9NCBCSZSJRSB_0__.Public.InstallAgent.dat
                • Size 55KB
                • SHA256 103edcdb6b30e07e2e7a9dd045e99809537d32d510d5484ab33d39c54374d833
                • MD5 SHA1 SHA512 SSDEEP

                wct168.tmp

                • Path C:\Users\Admin\AppData\Local\Temp\wct168.tmp
                • Size 62KB
                • SHA256 094754a618b102b7ad0800dd4c9c02c882cf2d1e7996ba864f422fa4312427e1
                • MD5 SHA1 SHA512 SSDEEP

                memory/456-150-0x0000000006C20000-0x0000000006D60000-memory.dmp

                memory/456-153-0x0000000006C20000-0x0000000006D60000-memory.dmp

                memory/456-139-0x0000000004DE4000-0x000000000528E000-memory.dmp

                memory/456-140-0x0000000005290000-0x00000000058E5000-memory.dmp

                memory/456-141-0x0000000000400000-0x00000000030D3000-memory.dmp

                memory/456-142-0x0000000000400000-0x00000000030D3000-memory.dmp

                memory/456-143-0x0000000005EF0000-0x0000000006A59000-memory.dmp

                memory/456-144-0x0000000005EF0000-0x0000000006A59000-memory.dmp

                memory/456-145-0x0000000005EF0000-0x0000000006A59000-memory.dmp

                memory/456-146-0x0000000006C20000-0x0000000006D60000-memory.dmp

                memory/456-147-0x0000000006C20000-0x0000000006D60000-memory.dmp

                memory/456-148-0x0000000006C20000-0x0000000006D60000-memory.dmp

                memory/456-149-0x0000000006C20000-0x0000000006D60000-memory.dmp

                memory/456-168-0x0000000000400000-0x00000000030D3000-memory.dmp

                memory/456-151-0x0000000006C20000-0x0000000006D60000-memory.dmp

                memory/456-167-0x0000000005EF0000-0x0000000006A59000-memory.dmp

                memory/456-152-0x0000000006C20000-0x0000000006D60000-memory.dmp

                memory/456-166-0x0000000000400000-0x00000000030D3000-memory.dmp

                memory/3364-135-0x0000000000400000-0x0000000002C3E000-memory.dmp

                memory/3364-132-0x0000000002FA9000-0x0000000002FBF000-memory.dmp

                memory/3364-133-0x0000000002D80000-0x0000000002D89000-memory.dmp

                memory/3364-134-0x0000000000400000-0x0000000002C3E000-memory.dmp

                memory/4996-158-0x00000000037A0000-0x00000000038E0000-memory.dmp

                memory/4996-156-0x0000000002B50000-0x00000000036B9000-memory.dmp

                memory/4996-159-0x00000000037A0000-0x00000000038E0000-memory.dmp

                memory/4996-163-0x00000000037A0000-0x00000000038E0000-memory.dmp

                memory/4996-164-0x00000000037A0000-0x00000000038E0000-memory.dmp

                memory/4996-165-0x0000000002B50000-0x00000000036B9000-memory.dmp

                memory/4996-155-0x0000000000690000-0x00000000010DA000-memory.dmp

                memory/4996-157-0x0000000002B50000-0x00000000036B9000-memory.dmp