Analysis

  • max time kernel
    150s
  • max time network
    152s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20221111-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
  • submitted
    04/01/2023, 04:47

General

  • Target
    file.exe
  • Size 366KB
  • Sample230104-fejbmsdh73
  • SHA256 79dbd3cf2e2673d4a3d3815f75e1ba8d83172cedf890d7ee173ae5d6acbd00e5
  • 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 20 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 21 IoCs
  • Suspicious use of FindShellTrayWindow 10 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:4428
  • C:\Users\Admin\AppData\Local\Temp\EBDC.exe
    C:\Users\Admin\AppData\Local\Temp\EBDC.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of WriteProcessMemory
    PID:1700
    • C:\Windows\SysWOW64\rundll32.exe
      "C:\Windows\system32\rundll32.exe" "C:\Users\Admin\AppData\Local\Temp\Oatedoqeryee.tmp",Yqiowyrat
      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:5088
      • C:\Windows\system32\rundll32.exe
        "C:\Windows\system32\rundll32.exe" "C:\Windows\system32\shell32.dll",#61 30923
        3⤵
        • Modifies registry class
        • Suspicious use of FindShellTrayWindow
        PID:4964
      • C:\Windows\SysWOW64\schtasks.exe
        schtasks /End /tn \Microsoft\Windows\Wininet\CacheTask
        3⤵
          PID:4380
        • C:\Windows\SysWOW64\schtasks.exe
          schtasks /Run /tn \Microsoft\Windows\Wininet\CacheTask
          3⤵
            PID:3216
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 1700 -s 544
          2⤵
          • Program crash
          PID:3608
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 472 -p 1700 -ip 1700
        1⤵
          PID:4312
        • C:\Windows\System32\rundll32.exe
          C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
          1⤵
            PID:3368

          Network

                MITRE ATT&CK Enterprise v6

                Replay Monitor

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                Downloads

                EBDC.exe

                • Path C:\Users\Admin\AppData\Local\Temp\EBDC.exe
                • Size 1.1MB
                • SHA256 d4b3fef59588acce4d941a6e8cf8b7d2dde28927d13190c32938316b386d6377
                • MD5 SHA1 SHA512 SSDEEP

                EBDC.exe

                • Path C:\Users\Admin\AppData\Local\Temp\EBDC.exe
                • Size 1.1MB
                • SHA256 d4b3fef59588acce4d941a6e8cf8b7d2dde28927d13190c32938316b386d6377
                • MD5 SHA1 SHA512 SSDEEP

                Oatedoqeryee.tmp

                • Path C:\Users\Admin\AppData\Local\Temp\Oatedoqeryee.tmp
                • Size 718KB
                • SHA256 200911b8faaea3104d1b51231d534e615fe755dc84024c1029aeafe1f842206b
                • MD5 SHA1 SHA512 SSDEEP

                Oatedoqeryee.tmp

                • Path C:\Users\Admin\AppData\Local\Temp\Oatedoqeryee.tmp
                • Size 718KB
                • SHA256 200911b8faaea3104d1b51231d534e615fe755dc84024c1029aeafe1f842206b
                • MD5 SHA1 SHA512 SSDEEP

                memory/1700-142-0x00000000049DA000-0x0000000004AA9000-memory.dmp

                memory/1700-144-0x0000000000400000-0x0000000002D07000-memory.dmp

                memory/1700-143-0x0000000004AB0000-0x0000000004BBC000-memory.dmp

                memory/4428-133-0x0000000004840000-0x0000000004849000-memory.dmp

                memory/4428-134-0x0000000000400000-0x0000000002C4E000-memory.dmp

                memory/4428-132-0x0000000002D8D000-0x0000000002DA2000-memory.dmp

                memory/4428-135-0x0000000000400000-0x0000000002C4E000-memory.dmp

                memory/4964-158-0x000001CD226C0000-0x000001CD2296E000-memory.dmp

                memory/4964-157-0x0000000000410000-0x00000000006AD000-memory.dmp

                memory/4964-155-0x000001CD24110000-0x000001CD24250000-memory.dmp

                memory/4964-154-0x000001CD24110000-0x000001CD24250000-memory.dmp

                memory/5088-152-0x0000000005800000-0x0000000005940000-memory.dmp

                memory/5088-151-0x0000000005800000-0x0000000005940000-memory.dmp

                memory/5088-150-0x0000000006FB0000-0x00000000070F0000-memory.dmp

                memory/5088-149-0x0000000006FB0000-0x00000000070F0000-memory.dmp

                memory/5088-156-0x0000000007076000-0x0000000007078000-memory.dmp

                memory/5088-148-0x0000000005800000-0x0000000005940000-memory.dmp

                memory/5088-147-0x0000000005800000-0x0000000005940000-memory.dmp

                memory/5088-146-0x0000000004C20000-0x0000000005740000-memory.dmp

                memory/5088-160-0x0000000004C20000-0x0000000005740000-memory.dmp

                memory/5088-145-0x0000000004C20000-0x0000000005740000-memory.dmp

                memory/5088-162-0x0000000007076000-0x0000000007078000-memory.dmp