Analysis

  • max time kernel
    155s
  • max time network
    162s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220901-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system
  • submitted
    08/11/2022, 11:20

General

  • Target
    file.exe
  • Size 165KB
  • Sample221108-nffadadef5
  • SHA256 d0d87cb5e049db6d429e8102c6457ae19a87e3cccfa487b670d4638ea6eaaaa7
  • 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 30 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:4540
  • C:\Users\Admin\AppData\Local\Temp\668A.exe
    C:\Users\Admin\AppData\Local\Temp\668A.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • Checks processor information in registry
    • Suspicious use of WriteProcessMemory
    PID:3484
    • C:\Windows\SysWOW64\rundll32.exe
      "C:\Windows\syswow64\rundll32.exe" "C:\Windows\syswow64\shell32.dll",#61
      2⤵
      • Blocklisted process makes network request
      PID:3732
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 3484 -s 616
      2⤵
      • Program crash
      PID:1456
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 3484 -s 932
      2⤵
      • Program crash
      PID:4924
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 3484 -s 948
      2⤵
      • Program crash
      PID:4088
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 3484 -s 1000
      2⤵
      • Program crash
      PID:5104
    • 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:1452
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 3484 -s 1044
      2⤵
      • Program crash
      PID:1932
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 428 -p 3484 -ip 3484
    1⤵
      PID:4336
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -pss -s 452 -p 3484 -ip 3484
      1⤵
        PID:3092
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 452 -p 3484 -ip 3484
        1⤵
          PID:4756
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -pss -s 416 -p 3484 -ip 3484
          1⤵
            PID:4080
          • C:\Windows\SysWOW64\WerFault.exe
            C:\Windows\SysWOW64\WerFault.exe -pss -s 520 -p 3484 -ip 3484
            1⤵
              PID:1088

            Network

                  MITRE ATT&CK Enterprise v6

                  Replay Monitor

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                  Downloads

                  668A.exe

                  • Path C:\Users\Admin\AppData\Local\Temp\668A.exe
                  • Size 1.3MB
                  • SHA256 ca3eeae101d743337a081d3dfe1e8ab6a4a0807bb3da2bf8da072a6f39c2ce04
                  • MD5 SHA1 SHA512 SSDEEP

                  668A.exe

                  • Path C:\Users\Admin\AppData\Local\Temp\668A.exe
                  • Size 1.3MB
                  • SHA256 ca3eeae101d743337a081d3dfe1e8ab6a4a0807bb3da2bf8da072a6f39c2ce04
                  • MD5 SHA1 SHA512 SSDEEP

                  Asureoatqaqrs.tmp

                  • Path C:\Users\Admin\AppData\Local\Temp\Asureoatqaqrs.tmp
                  • Size 3.5MB
                  • SHA256 11bca4b3a7c6a557f89dbf3bf37a5935f0d676f1de1e3e4cb7236d98c9831c5e
                  • MD5 SHA1 SHA512 SSDEEP

                  memory/1452-175-0x0000000002AA0000-0x0000000003604000-memory.dmp

                  memory/1452-174-0x0000000003610000-0x0000000003750000-memory.dmp

                  memory/1452-173-0x0000000003610000-0x0000000003750000-memory.dmp

                  memory/1452-172-0x0000000002AA0000-0x0000000003604000-memory.dmp

                  memory/1452-171-0x0000000003610000-0x0000000003750000-memory.dmp

                  memory/1452-170-0x0000000003610000-0x0000000003750000-memory.dmp

                  memory/1452-168-0x0000000002AA0000-0x0000000003604000-memory.dmp

                  memory/1452-169-0x00000000006D0000-0x0000000001114000-memory.dmp

                  memory/3484-155-0x0000000003030000-0x0000000003B94000-memory.dmp

                  memory/3484-144-0x0000000000400000-0x00000000006ED000-memory.dmp

                  memory/3484-142-0x0000000000C7E000-0x0000000000DA7000-memory.dmp

                  memory/3484-151-0x0000000000400000-0x00000000006ED000-memory.dmp

                  memory/3484-143-0x0000000002550000-0x0000000002831000-memory.dmp

                  memory/3484-145-0x0000000000400000-0x00000000006ED000-memory.dmp

                  memory/3484-167-0x0000000003030000-0x0000000003B94000-memory.dmp

                  memory/3484-146-0x0000000000400000-0x00000000006ED000-memory.dmp

                  memory/3484-156-0x0000000003030000-0x0000000003B94000-memory.dmp

                  memory/3484-157-0x0000000003030000-0x0000000003B94000-memory.dmp

                  memory/3484-158-0x0000000003E40000-0x0000000003F80000-memory.dmp

                  memory/3484-159-0x0000000003E40000-0x0000000003F80000-memory.dmp

                  memory/3484-160-0x0000000003E40000-0x0000000003F80000-memory.dmp

                  memory/3484-161-0x0000000003E40000-0x0000000003F80000-memory.dmp

                  memory/3484-162-0x0000000003E40000-0x0000000003F80000-memory.dmp

                  memory/3484-163-0x0000000003E40000-0x0000000003F80000-memory.dmp

                  memory/3484-164-0x0000000003E40000-0x0000000003F80000-memory.dmp

                  memory/3484-165-0x0000000003E40000-0x0000000003F80000-memory.dmp

                  memory/3732-153-0x0000000000650000-0x0000000000653000-memory.dmp

                  memory/3732-148-0x0000000000630000-0x0000000000633000-memory.dmp

                  memory/3732-152-0x0000000000650000-0x0000000000653000-memory.dmp

                  memory/3732-150-0x0000000000650000-0x0000000000653000-memory.dmp

                  memory/3732-149-0x0000000000640000-0x0000000000643000-memory.dmp

                  memory/4540-136-0x00000000007E0000-0x00000000007E9000-memory.dmp

                  memory/4540-138-0x0000000000400000-0x0000000000584000-memory.dmp

                  memory/4540-137-0x0000000000400000-0x0000000000584000-memory.dmp

                  memory/4540-135-0x0000000000897000-0x00000000008A8000-memory.dmp