Analysis

  • max time kernel
    150s
  • 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
    23/12/2022, 04:30

General

  • Target
    2434206c527db078fe7205544340c8be.exe
  • Size 328KB
  • Sample221223-e4vwasfh33
  • SHA256 e53a167c6e80f9392389e002cf0609f7f4b2cef439bb589459c07a8a5b9de8a1
  • 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 3 IoCs
  • Downloads MZ/PE file
  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 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 1 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 27 IoCs

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

  • Modifies Internet Explorer settings 1 TTPs 4 IoCs
  • Modifies registry class 30 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 18 IoCs
  • Suspicious use of FindShellTrayWindow 1 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 9 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2434206c527db078fe7205544340c8be.exe
    "C:\Users\Admin\AppData\Local\Temp\2434206c527db078fe7205544340c8be.exe"
    1⤵
    • Checks SCSI registry key(s)
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious behavior: MapViewOfSection
    PID:4152
  • C:\Users\Admin\AppData\Local\Temp\FB7C.exe
    C:\Users\Admin\AppData\Local\Temp\FB7C.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of WriteProcessMemory
    PID:2324
    • C:\Windows\SysWOW64\rundll32.exe
      "C:\Windows\system32\rundll32.exe" "C:\Users\Admin\AppData\Local\Temp\Oyiesauffusw.tmp",Wuuitfqhpt
      2⤵
      • Blocklisted process makes network request
      • Loads dropped DLL
      • Suspicious use of SetThreadContext
      • Checks processor information in registry
      • Suspicious use of WriteProcessMemory
      PID:672
      • C:\Windows\system32\rundll32.exe
        "C:\Windows\system32\rundll32.exe" "C:\Windows\system32\shell32.dll",#61 17147
        3⤵
        • Modifies registry class
        • Suspicious use of FindShellTrayWindow
        PID:4576
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 2324 -s 528
      2⤵
      • Program crash
      PID:1544
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 456 -p 2324 -ip 2324
    1⤵
      PID:2348
    • C:\Windows\System32\rundll32.exe
      C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
      1⤵
        PID:3960

      Network

            MITRE ATT&CK Enterprise v6

            Replay Monitor

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            Downloads

            FB7C.exe

            • Path C:\Users\Admin\AppData\Local\Temp\FB7C.exe
            • Size 1.1MB
            • SHA256 e10176a4fac07c5039cc88d20525d6f654485b92f520d0092152cfb0a4820484
            • MD5 SHA1 SHA512 SSDEEP

            FB7C.exe

            • Path C:\Users\Admin\AppData\Local\Temp\FB7C.exe
            • Size 1.1MB
            • SHA256 e10176a4fac07c5039cc88d20525d6f654485b92f520d0092152cfb0a4820484
            • MD5 SHA1 SHA512 SSDEEP

            Oyiesauffusw.tmp

            • Path C:\Users\Admin\AppData\Local\Temp\Oyiesauffusw.tmp
            • Size 730KB
            • SHA256 5cb8e52b000f84494627db8e8e700e7731c9bfa2eb9e6a8a8280d2311327e81a
            • MD5 SHA1 SHA512 SSDEEP

            Oyiesauffusw.tmp

            • Path C:\Users\Admin\AppData\Local\Temp\Oyiesauffusw.tmp
            • Size 730KB
            • SHA256 5cb8e52b000f84494627db8e8e700e7731c9bfa2eb9e6a8a8280d2311327e81a
            • MD5 SHA1 SHA512 SSDEEP

            memory/672-146-0x0000000004F40000-0x0000000005AA2000-memory.dmp

            memory/672-152-0x0000000004A30000-0x0000000004B70000-memory.dmp

            memory/672-159-0x0000000004F40000-0x0000000005AA2000-memory.dmp

            memory/672-153-0x0000000004A30000-0x0000000004B70000-memory.dmp

            memory/672-151-0x0000000006980000-0x0000000006AC0000-memory.dmp

            memory/672-150-0x0000000006980000-0x0000000006AC0000-memory.dmp

            memory/672-149-0x0000000004A30000-0x0000000004B70000-memory.dmp

            memory/672-148-0x0000000004A30000-0x0000000004B70000-memory.dmp

            memory/672-147-0x0000000004F40000-0x0000000005AA2000-memory.dmp

            memory/2324-144-0x0000000002360000-0x000000000247C000-memory.dmp

            memory/2324-143-0x0000000002281000-0x000000000235E000-memory.dmp

            memory/2324-145-0x0000000000400000-0x000000000051F000-memory.dmp

            memory/4152-135-0x00000000007E8000-0x00000000007FE000-memory.dmp

            memory/4152-133-0x00000000007B0000-0x00000000007B9000-memory.dmp

            memory/4152-134-0x0000000000400000-0x0000000000458000-memory.dmp

            memory/4152-136-0x0000000000400000-0x0000000000458000-memory.dmp

            memory/4152-132-0x00000000007E8000-0x00000000007FE000-memory.dmp

            memory/4576-158-0x000002382B170000-0x000002382B41C000-memory.dmp

            memory/4576-156-0x000002382CA30000-0x000002382CB70000-memory.dmp

            memory/4576-157-0x0000000000CB0000-0x0000000000F4A000-memory.dmp

            memory/4576-155-0x000002382CA30000-0x000002382CB70000-memory.dmp