Analysis

  • max time kernel
    150s
  • max time network
    153s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220901-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system
  • submitted
    02/11/2022, 11:48

General

  • Target
    file.exe
  • Size 322KB
  • Sample221102-nyfc4accer
  • SHA256 5f0bb5a18101052210a5f842ef8b5b1e558ae37e2bf130c070d4ad9af3b75475
  • 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 2 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 1 IoCs
  • Checks SCSI registry key(s) 3 TTPs 6 IoCs

    SCSI information is often read in order to detect sandboxing environments.

  • Checks processor information in registry 2 TTPs 42 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 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 33 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:5060
  • C:\Users\Admin\AppData\Local\Temp\2C7E.exe
    C:\Users\Admin\AppData\Local\Temp\2C7E.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • Checks processor information in registry
    • Suspicious use of WriteProcessMemory
    PID:4028
    • 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 AdjustPrivilegeToken
      • Suspicious use of FindShellTrayWindow
      PID:2936
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 4028 -s 988
      2⤵
      • Program crash
      PID:4748
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 4028 -ip 4028
    1⤵
      PID:4988
    • C:\Users\Admin\AppData\Roaming\acwidvj
      C:\Users\Admin\AppData\Roaming\acwidvj
      1⤵
      • Executes dropped EXE
      • Checks SCSI registry key(s)
      • Suspicious behavior: MapViewOfSection
      PID:1784

    Network

          MITRE ATT&CK Enterprise v6

          Replay Monitor

          Loading Replay Monitor...

          Downloads

          2C7E.exe

          • Path C:\Users\Admin\AppData\Local\Temp\2C7E.exe
          • Size 4.9MB
          • SHA256 b726c57fb9a6c0df2468fec5f2b77e5d5fa63d8f5601fc03ec0ab54211d41b96
          • MD5 SHA1 SHA512 SSDEEP

          2C7E.exe

          • Path C:\Users\Admin\AppData\Local\Temp\2C7E.exe
          • Size 4.9MB
          • SHA256 b726c57fb9a6c0df2468fec5f2b77e5d5fa63d8f5601fc03ec0ab54211d41b96
          • MD5 SHA1 SHA512 SSDEEP

          Rpiidpytrto.tmp

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

          StructuredQuery.log

          • Path C:\Users\Admin\AppData\Local\Temp\StructuredQuery.log
          • Size 4KB
          • SHA256 c7ac663de6c20c909c93ed1fa786259400c56bee376191eeb3c1534ea66a2357
          • MD5 SHA1 SHA512 SSDEEP

          dd_vcredistMSI75EB.txt

          • Path C:\Users\Admin\AppData\Local\Temp\dd_vcredistMSI75EB.txt
          • Size 427KB
          • SHA256 473401815de632e2a0991f99eeec41b583aa0256a3df3538af444ca2275a6af1
          • MD5 SHA1 SHA512 SSDEEP

          wctFE60.tmp

          • Path C:\Users\Admin\AppData\Local\Temp\wctFE60.tmp
          • Size 62KB
          • SHA256 4420111c2dcd4928407eb5dec0c7270d382375392635959c816faf8b50cb95e3
          • MD5 SHA1 SHA512 SSDEEP

          acwidvj

          • Path C:\Users\Admin\AppData\Roaming\acwidvj
          • Size 322KB
          • SHA256 5f0bb5a18101052210a5f842ef8b5b1e558ae37e2bf130c070d4ad9af3b75475
          • MD5 SHA1 SHA512 SSDEEP

          acwidvj

          • Path C:\Users\Admin\AppData\Roaming\acwidvj
          • Size 322KB
          • SHA256 5f0bb5a18101052210a5f842ef8b5b1e558ae37e2bf130c070d4ad9af3b75475
          • MD5 SHA1 SHA512 SSDEEP

          memory/1784-173-0x0000000000400000-0x0000000002C3E000-memory.dmp

          memory/1784-172-0x0000000000400000-0x0000000002C3E000-memory.dmp

          memory/1784-171-0x0000000002F48000-0x0000000002F5D000-memory.dmp

          memory/2936-164-0x0000000003820000-0x0000000003960000-memory.dmp

          memory/2936-165-0x0000000003820000-0x0000000003960000-memory.dmp

          memory/2936-166-0x0000000002CB0000-0x0000000003819000-memory.dmp

          memory/2936-159-0x0000000003820000-0x0000000003960000-memory.dmp

          memory/2936-158-0x0000000003820000-0x0000000003960000-memory.dmp

          memory/2936-157-0x0000000002CB0000-0x0000000003819000-memory.dmp

          memory/2936-156-0x0000000002CB0000-0x0000000003819000-memory.dmp

          memory/2936-155-0x0000000000AC0000-0x000000000150A000-memory.dmp

          memory/4028-142-0x0000000000400000-0x00000000030D3000-memory.dmp

          memory/4028-143-0x0000000005F30000-0x0000000006A99000-memory.dmp

          memory/4028-152-0x0000000006C60000-0x0000000006DA0000-memory.dmp

          memory/4028-151-0x0000000006C60000-0x0000000006DA0000-memory.dmp

          memory/4028-150-0x0000000006C60000-0x0000000006DA0000-memory.dmp

          memory/4028-149-0x0000000006C60000-0x0000000006DA0000-memory.dmp

          memory/4028-148-0x0000000006C60000-0x0000000006DA0000-memory.dmp

          memory/4028-147-0x0000000006C60000-0x0000000006DA0000-memory.dmp

          memory/4028-146-0x0000000006C60000-0x0000000006DA0000-memory.dmp

          memory/4028-145-0x0000000005F30000-0x0000000006A99000-memory.dmp

          memory/4028-144-0x0000000005F30000-0x0000000006A99000-memory.dmp

          memory/4028-153-0x0000000006C60000-0x0000000006DA0000-memory.dmp

          memory/4028-141-0x0000000000400000-0x00000000030D3000-memory.dmp

          memory/4028-140-0x0000000005310000-0x0000000005965000-memory.dmp

          memory/4028-167-0x0000000000400000-0x00000000030D3000-memory.dmp

          memory/4028-168-0x0000000005F30000-0x0000000006A99000-memory.dmp

          memory/4028-139-0x0000000004E63000-0x000000000530C000-memory.dmp

          memory/5060-132-0x0000000002CE9000-0x0000000002CFF000-memory.dmp

          memory/5060-135-0x0000000000400000-0x0000000002C3E000-memory.dmp

          memory/5060-134-0x0000000000400000-0x0000000002C3E000-memory.dmp

          memory/5060-133-0x0000000002CC0000-0x0000000002CC9000-memory.dmp