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
    11/01/2023, 20:20

General

  • Target
    file.exe
  • Size 319KB
  • Sample230111-y4envsec28
  • SHA256 df2abd290a9089f10d59fc5eb57e93894820cd91d7c6bc1bf64418f1618ea7fa
  • 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 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 19 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:2016
  • C:\Users\Admin\AppData\Local\Temp\DBAF.exe
    C:\Users\Admin\AppData\Local\Temp\DBAF.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of WriteProcessMemory
    PID:3228
    • C:\Windows\SysWOW64\rundll32.exe
      "C:\Windows\system32\rundll32.exe" "C:\Users\Admin\AppData\Local\Temp\Qytyaworpiotpd.tmp",Edoqqdswdffqipe
      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:176
      • C:\Windows\system32\rundll32.exe
        "C:\Windows\system32\rundll32.exe" "C:\Windows\system32\shell32.dll",#61 23789
        3⤵
        • Modifies registry class
        • Suspicious use of FindShellTrayWindow
        PID:4200
      • C:\Windows\SysWOW64\schtasks.exe
        schtasks /End /tn \Microsoft\Windows\Wininet\CacheTask
        3⤵
          PID:4016
        • C:\Windows\SysWOW64\schtasks.exe
          schtasks /Run /tn \Microsoft\Windows\Wininet\CacheTask
          3⤵
            PID:1796
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 3228 -s 532
          2⤵
          • Program crash
          PID:5076
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 480 -p 3228 -ip 3228
        1⤵
          PID:220
        • C:\Windows\System32\rundll32.exe
          C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
          1⤵
            PID:3336

          Network

                MITRE ATT&CK Enterprise v6

                Replay Monitor

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                Downloads

                DBAF.exe

                • Path C:\Users\Admin\AppData\Local\Temp\DBAF.exe
                • Size 1.1MB
                • SHA256 2297d4ab602b2e9ce7aa4aa0f50c6c0df96f7e8276c178239266d35a706960de
                • MD5 SHA1 SHA512 SSDEEP

                DBAF.exe

                • Path C:\Users\Admin\AppData\Local\Temp\DBAF.exe
                • Size 1.1MB
                • SHA256 2297d4ab602b2e9ce7aa4aa0f50c6c0df96f7e8276c178239266d35a706960de
                • MD5 SHA1 SHA512 SSDEEP

                Qytyaworpiotpd.tmp

                • Path C:\Users\Admin\AppData\Local\Temp\Qytyaworpiotpd.tmp
                • Size 752KB
                • SHA256 72021339c18f79141f9867c30616cbbdc517471e44d16bfe81063e5c7dba56c3
                • MD5 SHA1 SHA512 SSDEEP

                Qytyaworpiotpd.tmp

                • Path C:\Users\Admin\AppData\Local\Temp\Qytyaworpiotpd.tmp
                • Size 752KB
                • SHA256 72021339c18f79141f9867c30616cbbdc517471e44d16bfe81063e5c7dba56c3
                • MD5 SHA1 SHA512 SSDEEP

                memory/176-146-0x0000000004740000-0x000000000529B000-memory.dmp

                memory/176-147-0x0000000004210000-0x0000000004350000-memory.dmp

                memory/176-150-0x0000000004210000-0x0000000004350000-memory.dmp

                memory/176-151-0x0000000004210000-0x0000000004350000-memory.dmp

                memory/176-149-0x0000000004210000-0x0000000004350000-memory.dmp

                memory/176-159-0x0000000004740000-0x000000000529B000-memory.dmp

                memory/176-152-0x0000000004210000-0x0000000004350000-memory.dmp

                memory/176-145-0x0000000004740000-0x000000000529B000-memory.dmp

                memory/176-148-0x0000000004210000-0x0000000004350000-memory.dmp

                memory/2016-134-0x0000000000400000-0x0000000000456000-memory.dmp

                memory/2016-132-0x00000000006FE000-0x0000000000713000-memory.dmp

                memory/2016-133-0x0000000002190000-0x0000000002199000-memory.dmp

                memory/2016-135-0x0000000000400000-0x0000000000456000-memory.dmp

                memory/3228-143-0x00000000022A0000-0x00000000023C0000-memory.dmp

                memory/3228-144-0x0000000000400000-0x0000000000523000-memory.dmp

                memory/3228-142-0x00000000020B8000-0x0000000002199000-memory.dmp

                memory/4200-154-0x000002C4CC130000-0x000002C4CC270000-memory.dmp

                memory/4200-155-0x000002C4CC130000-0x000002C4CC270000-memory.dmp

                memory/4200-156-0x00000000003A0000-0x000000000064A000-memory.dmp

                memory/4200-157-0x000002C4CA6D0000-0x000002C4CA98B000-memory.dmp