Analysis

  • max time kernel
    151s
  • max time network
    145s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220812-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
  • submitted
    19/01/2023, 17:24

General

  • Target
    file.exe
  • Size 185KB
  • Sample230119-vypp4adf3x
  • SHA256 267ce79e5db1f459443f65f7b1d0eb8a7596de1b5efca4c0b682b0476f56cd41
  • 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
  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs
  • Accesses Microsoft Outlook profiles 1 TTPs 4 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 3 IoCs

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

  • Checks processor information in registry 2 TTPs 23 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 23 IoCs
  • Suspicious use of FindShellTrayWindow 10 IoCs
  • Suspicious use of SendNotifyMessage 1 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 15 IoCs
  • outlook_office_path 1 IoCs
  • outlook_win_path 1 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:1124
  • C:\Users\Admin\AppData\Local\Temp\D7F6.exe
    C:\Users\Admin\AppData\Local\Temp\D7F6.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of WriteProcessMemory
    PID:312
    • C:\Windows\SysWOW64\rundll32.exe
      "C:\Windows\system32\rundll32.exe" "C:\Users\Admin\AppData\Local\Temp\Waeeuireedsay.tmp",Oqahautwaqfe
      2⤵
      • Blocklisted process makes network request
      • Loads dropped DLL
      • Accesses Microsoft Outlook accounts
      • Accesses Microsoft Outlook profiles
      • Suspicious use of SetThreadContext
      • Checks processor information in registry
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of WriteProcessMemory
      • outlook_office_path
      • outlook_win_path
      PID:2032
      • C:\Windows\system32\rundll32.exe
        "C:\Windows\system32\rundll32.exe" "C:\Windows\system32\shell32.dll",#61 19043
        3⤵
        • Modifies registry class
        • Suspicious use of FindShellTrayWindow
        PID:2312
      • C:\Windows\SysWOW64\schtasks.exe
        schtasks /End /tn \Microsoft\Windows\Wininet\CacheTask
        3⤵
          PID:892
        • C:\Windows\SysWOW64\schtasks.exe
          schtasks /Run /tn \Microsoft\Windows\Wininet\CacheTask
          3⤵
            PID:3712
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 312 -s 528
          2⤵
          • Program crash
          PID:4380
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 312 -ip 312
        1⤵
          PID:2060
        • C:\Windows\System32\rundll32.exe
          C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
          1⤵
            PID:1564

          Network

                MITRE ATT&CK Enterprise v6

                Replay Monitor

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                Downloads

                D7F6.exe

                • Path C:\Users\Admin\AppData\Local\Temp\D7F6.exe
                • Size 1.0MB
                • SHA256 24be405c8f5018ec9b3cdd593aef5775a9a8a5f1f367152f676b78a82e4a2822
                • MD5 SHA1 SHA512 SSDEEP

                D7F6.exe

                • Path C:\Users\Admin\AppData\Local\Temp\D7F6.exe
                • Size 1.0MB
                • SHA256 24be405c8f5018ec9b3cdd593aef5775a9a8a5f1f367152f676b78a82e4a2822
                • MD5 SHA1 SHA512 SSDEEP

                Waeeuireedsay.tmp

                • Path C:\Users\Admin\AppData\Local\Temp\Waeeuireedsay.tmp
                • Size 789KB
                • SHA256 58f15bf40913e3a5ee03d0998e447a5de96d36cb96d9733dd57f6708220b9923
                • MD5 SHA1 SHA512 SSDEEP

                Waeeuireedsay.tmp

                • Path C:\Users\Admin\AppData\Local\Temp\Waeeuireedsay.tmp
                • Size 789KB
                • SHA256 58f15bf40913e3a5ee03d0998e447a5de96d36cb96d9733dd57f6708220b9923
                • MD5 SHA1 SHA512 SSDEEP

                memory/312-143-0x0000000004B90000-0x0000000004CBB000-memory.dmp

                memory/312-140-0x0000000004A9E000-0x0000000004B86000-memory.dmp

                memory/312-144-0x0000000000400000-0x0000000002C6D000-memory.dmp

                memory/1124-135-0x0000000000400000-0x0000000002B98000-memory.dmp

                memory/1124-134-0x0000000000400000-0x0000000002B98000-memory.dmp

                memory/1124-133-0x0000000002C60000-0x0000000002C69000-memory.dmp

                memory/1124-132-0x0000000002D1D000-0x0000000002D30000-memory.dmp

                memory/2032-146-0x0000000004D40000-0x00000000058A3000-memory.dmp

                memory/2032-152-0x0000000004790000-0x00000000048D0000-memory.dmp

                memory/2032-147-0x0000000004790000-0x00000000048D0000-memory.dmp

                memory/2032-148-0x0000000004790000-0x00000000048D0000-memory.dmp

                memory/2032-149-0x0000000004790000-0x00000000048D0000-memory.dmp

                memory/2032-150-0x0000000004790000-0x00000000048D0000-memory.dmp

                memory/2032-151-0x0000000004790000-0x00000000048D0000-memory.dmp

                memory/2032-145-0x0000000004D40000-0x00000000058A3000-memory.dmp

                memory/2032-159-0x0000000004D40000-0x00000000058A3000-memory.dmp

                memory/2312-155-0x0000013CE6080000-0x0000013CE61C0000-memory.dmp

                memory/2312-156-0x0000000000240000-0x00000000004D2000-memory.dmp

                memory/2312-157-0x0000013CE4630000-0x0000013CE48D3000-memory.dmp

                memory/2312-154-0x0000013CE6080000-0x0000013CE61C0000-memory.dmp