Analysis

  • max time kernel
    150s
  • max time network
    131s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220812-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
  • submitted
    23/01/2023, 03:58

General

  • Target
    file.exe
  • Size 195KB
  • Sample230123-ejgsyadd5y
  • SHA256 4cb8050b1a3d665fbe9c75e557fa6704055427c6d2f76ef98f36ccba95a2a721
  • 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 2 IoCs
  • Loads dropped DLL 2 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 6 IoCs

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

  • Checks processor information in registry 2 TTPs 18 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 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 20 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\file.exe
    "C:\Users\Admin\AppData\Local\Temp\file.exe"
    1⤵
    • Checks SCSI registry key(s)
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious behavior: MapViewOfSection
    PID:4400
  • C:\Users\Admin\AppData\Local\Temp\E072.exe
    C:\Users\Admin\AppData\Local\Temp\E072.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of WriteProcessMemory
    PID:1220
    • C:\Windows\SysWOW64\rundll32.exe
      C:\Windows\system32\rundll32.exe C:\Users\Admin\AppData\Local\Temp\Qdwywhepeywaes.dll,start
      2⤵
      • Blocklisted process makes network request
      • Loads dropped DLL
      • Suspicious use of SetThreadContext
      • Checks processor information in registry
      • Suspicious use of WriteProcessMemory
      PID:4736
      • C:\Windows\system32\rundll32.exe
        "C:\Windows\system32\rundll32.exe" "C:\Windows\system32\shell32.dll",#61 30707
        3⤵
        • Modifies registry class
        • Suspicious use of FindShellTrayWindow
        PID:3308
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 1220 -s 484
      2⤵
      • Program crash
      PID:4520
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 1220 -ip 1220
    1⤵
      PID:3428
    • C:\Windows\System32\rundll32.exe
      C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
      1⤵
        PID:2224
      • C:\Users\Admin\AppData\Roaming\ajvagdt
        C:\Users\Admin\AppData\Roaming\ajvagdt
        1⤵
        • Executes dropped EXE
        • Checks SCSI registry key(s)
        • Suspicious behavior: MapViewOfSection
        PID:4196

      Network

            MITRE ATT&CK Enterprise v6

            Replay Monitor

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            Downloads

            E072.exe

            • Path C:\Users\Admin\AppData\Local\Temp\E072.exe
            • Size 3.6MB
            • SHA256 0c9fb8f1b3f23df7b5773ef9b4d79faf80fcc3f4a0e2a7b6d36d304e1801cdc3
            • MD5 SHA1 SHA512 SSDEEP

            E072.exe

            • Path C:\Users\Admin\AppData\Local\Temp\E072.exe
            • Size 3.6MB
            • SHA256 0c9fb8f1b3f23df7b5773ef9b4d79faf80fcc3f4a0e2a7b6d36d304e1801cdc3
            • MD5 SHA1 SHA512 SSDEEP

            Qdwywhepeywaes.dll

            • Path C:\Users\Admin\AppData\Local\Temp\Qdwywhepeywaes.dll
            • Size 4.3MB
            • SHA256 d808bf7174d92e353b9bf1ac3a528243888f1ffc775ad89e7ddcc7106c9df4b2
            • MD5 SHA1 SHA512 SSDEEP

            Qdwywhepeywaes.dll

            • Path C:\Users\Admin\AppData\Local\Temp\Qdwywhepeywaes.dll
            • Size 4.3MB
            • SHA256 d808bf7174d92e353b9bf1ac3a528243888f1ffc775ad89e7ddcc7106c9df4b2
            • MD5 SHA1 SHA512 SSDEEP

            Qdwywhepeywaes.dll

            • Path C:\Users\Admin\AppData\Local\Temp\Qdwywhepeywaes.dll
            • Size 4.3MB
            • SHA256 d808bf7174d92e353b9bf1ac3a528243888f1ffc775ad89e7ddcc7106c9df4b2
            • MD5 SHA1 SHA512 SSDEEP

            ajvagdt

            • Path C:\Users\Admin\AppData\Roaming\ajvagdt
            • Size 195KB
            • SHA256 4cb8050b1a3d665fbe9c75e557fa6704055427c6d2f76ef98f36ccba95a2a721
            • MD5 SHA1 SHA512 SSDEEP

            ajvagdt

            • Path C:\Users\Admin\AppData\Roaming\ajvagdt
            • Size 195KB
            • SHA256 4cb8050b1a3d665fbe9c75e557fa6704055427c6d2f76ef98f36ccba95a2a721
            • MD5 SHA1 SHA512 SSDEEP

            memory/1220-142-0x0000000000400000-0x0000000002F0B000-memory.dmp

            memory/1220-141-0x0000000005040000-0x0000000005522000-memory.dmp

            memory/1220-140-0x0000000004CBD000-0x000000000503F000-memory.dmp

            memory/1220-149-0x0000000000400000-0x0000000002F0B000-memory.dmp

            memory/3308-165-0x0000025A43790000-0x0000025A43A3F000-memory.dmp

            memory/3308-164-0x00000000002E0000-0x000000000057D000-memory.dmp

            memory/3308-162-0x0000025A45050000-0x0000025A45190000-memory.dmp

            memory/3308-161-0x0000025A45050000-0x0000025A45190000-memory.dmp

            memory/4196-170-0x0000000000400000-0x0000000002B9B000-memory.dmp

            memory/4196-169-0x0000000002CBB000-0x0000000002CCE000-memory.dmp

            memory/4196-171-0x0000000000400000-0x0000000002B9B000-memory.dmp

            memory/4400-134-0x00000000048D0000-0x00000000048D9000-memory.dmp

            memory/4400-135-0x0000000000400000-0x0000000002B9B000-memory.dmp

            memory/4400-133-0x0000000002BA0000-0x0000000002CA0000-memory.dmp

            memory/4400-136-0x0000000000400000-0x0000000002B9B000-memory.dmp

            memory/4736-151-0x0000000003430000-0x0000000003FA6000-memory.dmp

            memory/4736-158-0x0000000004070000-0x00000000041B0000-memory.dmp

            memory/4736-157-0x0000000004070000-0x00000000041B0000-memory.dmp

            memory/4736-159-0x0000000004070000-0x00000000041B0000-memory.dmp

            memory/4736-156-0x0000000004070000-0x00000000041B0000-memory.dmp

            memory/4736-155-0x0000000004070000-0x00000000041B0000-memory.dmp

            memory/4736-163-0x00000000040E9000-0x00000000040EB000-memory.dmp

            memory/4736-154-0x0000000004070000-0x00000000041B0000-memory.dmp

            memory/4736-153-0x0000000003430000-0x0000000003FA6000-memory.dmp

            memory/4736-166-0x0000000003430000-0x0000000003FA6000-memory.dmp

            memory/4736-152-0x0000000003430000-0x0000000003FA6000-memory.dmp

            memory/4736-150-0x0000000001F50000-0x00000000023A0000-memory.dmp

            memory/4736-148-0x0000000001F50000-0x00000000023A0000-memory.dmp

            memory/4736-147-0x0000000001F50000-0x00000000023A0000-memory.dmp