Analysis

  • max time kernel
    150s
  • max time network
    156s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220901-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system
  • submitted
    05/12/2022, 09:25

General

  • Target
    file.exe
  • Size 200KB
  • Sample221205-ldl9ssfa34
  • SHA256 03c8b94a394019a66f93cbd3393c4f4fb94c8079853dcd6f2b382fe4f800be84
  • 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 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 39 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 38 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:4828
  • C:\Users\Admin\AppData\Local\Temp\4064.exe
    C:\Users\Admin\AppData\Local\Temp\4064.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • Checks processor information in registry
    • Suspicious use of WriteProcessMemory
    PID:3568
    • C:\Windows\SysWOW64\rundll32.exe
      "C:\Windows\syswow64\rundll32.exe" "C:\Windows\syswow64\shell32.dll",#61
      2⤵
      • Blocklisted process makes network request
      PID:4860
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 3568 -s 768
      2⤵
      • Program crash
      PID:4916
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 3568 -s 932
      2⤵
      • Program crash
      PID:60
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 3568 -s 1004
      2⤵
      • Program crash
      PID:4824
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 3568 -s 988
      2⤵
      • Program crash
      PID:4120
    • 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:2424
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 3568 -s 1104
      2⤵
      • Program crash
      PID:544
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 3568 -ip 3568
    1⤵
      PID:4888
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -pss -s 524 -p 3568 -ip 3568
      1⤵
        PID:2372
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 540 -p 3568 -ip 3568
        1⤵
          PID:2088
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -pss -s 468 -p 3568 -ip 3568
          1⤵
            PID:1508
          • C:\Windows\SysWOW64\WerFault.exe
            C:\Windows\SysWOW64\WerFault.exe -pss -s 520 -p 3568 -ip 3568
            1⤵
              PID:5012

            Network

                  MITRE ATT&CK Enterprise v6

                  Replay Monitor

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                  Downloads

                  4064.exe

                  • Path C:\Users\Admin\AppData\Local\Temp\4064.exe
                  • Size 1.7MB
                  • SHA256 cb011c5b9f1fe3f4febc23ab68008af3a3c3621c85baa48deec4466be32e2f78
                  • MD5 SHA1 SHA512 SSDEEP

                  4064.exe

                  • Path C:\Users\Admin\AppData\Local\Temp\4064.exe
                  • Size 1.7MB
                  • SHA256 cb011c5b9f1fe3f4febc23ab68008af3a3c3621c85baa48deec4466be32e2f78
                  • MD5 SHA1 SHA512 SSDEEP

                  Yquweehou.tmp

                  • Path C:\Users\Admin\AppData\Local\Temp\Yquweehou.tmp
                  • Size 3.5MB
                  • SHA256 b6fe7509e0f2421159039611dc2a24c6ccef55c55382c888564c443017528c6e
                  • MD5 SHA1 SHA512 SSDEEP

                  memory/2424-181-0x00000000033D0000-0x0000000003F33000-memory.dmp

                  memory/2424-174-0x00000000033D0000-0x0000000003F33000-memory.dmp

                  memory/2424-176-0x0000000000E00000-0x0000000001844000-memory.dmp

                  memory/2424-177-0x0000000004000000-0x0000000004140000-memory.dmp

                  memory/2424-175-0x0000000004000000-0x0000000004140000-memory.dmp

                  memory/2424-178-0x00000000033D0000-0x0000000003F33000-memory.dmp

                  memory/2424-179-0x0000000004000000-0x0000000004140000-memory.dmp

                  memory/2424-180-0x0000000004000000-0x0000000004140000-memory.dmp

                  memory/3568-140-0x0000000000400000-0x00000000007FB000-memory.dmp

                  memory/3568-172-0x0000000003F00000-0x0000000004040000-memory.dmp

                  memory/3568-182-0x0000000000400000-0x00000000007FB000-memory.dmp

                  memory/3568-183-0x00000000032D0000-0x0000000003E33000-memory.dmp

                  memory/3568-143-0x0000000000400000-0x00000000007FB000-memory.dmp

                  memory/3568-142-0x0000000000400000-0x00000000007FB000-memory.dmp

                  memory/3568-168-0x0000000003F00000-0x0000000004040000-memory.dmp

                  memory/3568-139-0x000000000247D000-0x0000000002617000-memory.dmp

                  memory/3568-141-0x0000000002720000-0x0000000002B0E000-memory.dmp

                  memory/3568-166-0x0000000003F00000-0x0000000004040000-memory.dmp

                  memory/3568-167-0x0000000003F00000-0x0000000004040000-memory.dmp

                  memory/3568-165-0x0000000003F00000-0x0000000004040000-memory.dmp

                  memory/3568-171-0x0000000003F00000-0x0000000004040000-memory.dmp

                  memory/3568-170-0x0000000003F00000-0x0000000004040000-memory.dmp

                  memory/3568-169-0x0000000003F00000-0x0000000004040000-memory.dmp

                  memory/3568-160-0x0000000000400000-0x00000000007FB000-memory.dmp

                  memory/3568-164-0x00000000032D0000-0x0000000003E33000-memory.dmp

                  memory/3568-162-0x00000000032D0000-0x0000000003E33000-memory.dmp

                  memory/3568-163-0x00000000032D0000-0x0000000003E33000-memory.dmp

                  memory/4828-133-0x00000000005B0000-0x00000000005B9000-memory.dmp

                  memory/4828-134-0x0000000000400000-0x0000000000468000-memory.dmp

                  memory/4828-132-0x0000000000729000-0x000000000073A000-memory.dmp

                  memory/4828-135-0x0000000000400000-0x0000000000468000-memory.dmp

                  memory/4860-146-0x0000000000DE0000-0x0000000000DE3000-memory.dmp

                  memory/4860-159-0x00000000010A0000-0x00000000010A3000-memory.dmp

                  memory/4860-157-0x0000000001090000-0x0000000001093000-memory.dmp

                  memory/4860-158-0x00000000010A0000-0x00000000010A3000-memory.dmp

                  memory/4860-156-0x0000000001080000-0x0000000001083000-memory.dmp

                  memory/4860-155-0x0000000001070000-0x0000000001073000-memory.dmp

                  memory/4860-154-0x0000000001060000-0x0000000001063000-memory.dmp

                  memory/4860-153-0x0000000001050000-0x0000000001053000-memory.dmp

                  memory/4860-152-0x0000000001040000-0x0000000001043000-memory.dmp

                  memory/4860-151-0x0000000001030000-0x0000000001033000-memory.dmp

                  memory/4860-150-0x0000000001020000-0x0000000001023000-memory.dmp

                  memory/4860-149-0x0000000001010000-0x0000000001013000-memory.dmp

                  memory/4860-148-0x0000000001000000-0x0000000001003000-memory.dmp

                  memory/4860-147-0x0000000000DF0000-0x0000000000DF3000-memory.dmp

                  memory/4860-145-0x0000000000DD0000-0x0000000000DD3000-memory.dmp