Overview

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Analysis

  • max time kernel
    301s
  • max time network
    257s
  • platform
    windows10_x64
  • resource
    win10v20201028
  • submitted
    18-11-2020 15:58

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Report Analysis Logs

General

  • Target

    Archive.zip__ccacaxs2tbz2t6ob3e.exe

Score
8/10
discoverypersistencespywarestealer

Malware Config

Signatures

  • Creates new service(s) 1 TTPs
    persistence
  • Downloads MZ/PE file
  • Executes dropped EXE 7 IoCs
  • Loads dropped DLL 64 IoCs
  • Reads user/profile data of web browsers 2 TTPs

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

    spywarestealer
  • Adds Run key to start application 2 TTPs 1 IoCs
    persistence
  • Checks installed software on the system 1 TTPs

    Looks up Uninstall key entries in the registry to enumerate software on the system.

    discovery
  • Drops desktop.ini file(s) 2 IoCs
  • Legitimate hosting services abused for malware hosting/C2 1 TTPs
  • Looks up external IP address via web service 1 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Drops file in System32 directory 4 IoCs
  • Drops file in Program Files directory 64 IoCs
  • Drops file in Windows directory 7 IoCs
  • Launches sc.exe

    Sc.exe is a Windows utlilty to control services on the system.

  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

  • Checks SCSI registry key(s) 3 TTPs 3 IoCs

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

  • Modifies Internet Explorer settings 1 TTPs 12 IoCs
    adwarespyware
  • Modifies Internet Explorer start page 1 TTPs 1 IoCs
    stealer
  • Modifies data under HKEY_USERS 54 IoCs
  • Modifies system certificate store 2 TTPs 5 IoCs
    evasionspywaretrojan
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 18 IoCs
  • Suspicious use of FindShellTrayWindow 64 IoCs
  • Suspicious use of SendNotifyMessage 64 IoCs
  • Suspicious use of WriteProcessMemory 47 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Archive.zip__ccacaxs2tbz2t6ob3e.exe
    "C:\Users\Admin\AppData\Local\Temp\Archive.zip__ccacaxs2tbz2t6ob3e.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:4704
    • C:\Users\Admin\AppData\Local\Temp\Temp\WCInstaller.exe
      C:\Users\Admin\AppData\Local\Temp\Temp\WCInstaller.exe --silent --partner=AE190201 --homepage=1 --search=1 --campaign=292
      2⤵
      • Executes dropped EXE
      • Suspicious use of WriteProcessMemory
      PID:3860
      • C:\Users\Admin\AppData\Local\Temp\7zS41F742A4\WebCompanionInstaller.exe
        .\WebCompanionInstaller.exe --partner=AE190201 --campaign=292 --version=7.0.2354.4185 --prod --silent --partner=AE190201 --homepage=1 --search=1 --campaign=292
        3⤵
        • Executes dropped EXE
        • Loads dropped DLL
        • Drops file in Program Files directory
        • Drops file in Windows directory
        • Modifies system certificate store
        • Suspicious use of WriteProcessMemory
        PID:4056
        • C:\Windows\SysWOW64\sc.exe
          "sc.exe" Create "WCAssistantService" binPath= "C:\Program Files (x86)\Lavasoft\Web Companion\Application\Lavasoft.WCAssistant.WinService.exe" DisplayName= "WC Assistant" start= auto
          4⤵
            PID:4480
          • C:\Windows\SysWOW64\sc.exe
            "sc.exe" failure WCAssistantService reset= 30 actions= restart/60000
            4⤵
              PID:808
            • C:\Windows\SysWOW64\sc.exe
              "sc.exe" description "WCAssistantService" "Ad-Aware Web Companion Internet security service"
              4⤵
                PID:616
              • C:\Windows\SysWOW64\cmd.exe
                "C:\Windows\System32\cmd.exe" /C netsh http add urlacl url=http://+:9007/ user=Everyone
                4⤵
                • Suspicious use of WriteProcessMemory
                PID:1328
                • C:\Windows\SysWOW64\netsh.exe
                  netsh http add urlacl url=http://+:9007/ user=Everyone
                  5⤵
                    PID:1592
                • C:\Program Files (x86)\Lavasoft\Web Companion\Application\WebCompanion.exe
                  "C:\Program Files (x86)\Lavasoft\Web Companion\Application\WebCompanion.exe" --silent --install --geo=
                  4⤵
                  • Executes dropped EXE
                  • Loads dropped DLL
                  • Adds Run key to start application
                  • Drops desktop.ini file(s)
                  • Drops file in Windows directory
                  • Modifies Internet Explorer settings
                  • Modifies Internet Explorer start page
                  • Suspicious behavior: EnumeratesProcesses
                  • Suspicious use of AdjustPrivilegeToken
                  • Suspicious use of WriteProcessMemory
                  PID:1748
                  • C:\Windows\Microsoft.NET\Framework\v2.0.50727\csc.exe
                    "C:\Windows\Microsoft.NET\Framework\v2.0.50727\csc.exe" /noconfig /fullpaths @"C:\Users\Admin\AppData\Local\Temp\wribbtiu.cmdline"
                    5⤵
                    • Suspicious use of WriteProcessMemory
                    PID:4920
                    • C:\Windows\Microsoft.NET\Framework\v2.0.50727\cvtres.exe
                      C:\Windows\Microsoft.NET\Framework\v2.0.50727\cvtres.exe /NOLOGO /READONLY /MACHINE:IX86 "/OUT:C:\Users\Admin\AppData\Local\Temp\RES1C63.tmp" "c:\Users\Admin\AppData\Local\Temp\CSC1C62.tmp"
                      6⤵
                        PID:4152
                    • C:\Program Files (x86)\Lavasoft\Web Companion\Application\Ad-Aware Web Companion.exe
                      "C:\Program Files (x86)\Lavasoft\Web Companion\Application\Ad-Aware Web Companion.exe" {0633EE93-D776-472f-A0FF-E1416B8B2E3A}
                      5⤵
                      • Executes dropped EXE
                      PID:4436
                  • C:\Program Files (x86)\Lavasoft\Web Companion\Application\WebCompanion.exe
                    "C:\Program Files (x86)\Lavasoft\Web Companion\Application\WebCompanion.exe" --silent --afterinstall
                    4⤵
                    • Executes dropped EXE
                    • Suspicious use of AdjustPrivilegeToken
                    • Suspicious use of FindShellTrayWindow
                    • Suspicious use of SendNotifyMessage
                    PID:4936
              • C:\Users\Admin\AppData\Local\Temp\B1FE.tmp.exe
                C:\Users\Admin\AppData\Local\Temp\B1FE.tmp.exe
                2⤵
                • Executes dropped EXE
                PID:500
            • C:\Program Files (x86)\Lavasoft\Web Companion\Application\Lavasoft.WCAssistant.WinService.exe
              "C:\Program Files (x86)\Lavasoft\Web Companion\Application\Lavasoft.WCAssistant.WinService.exe"
              1⤵
              • Executes dropped EXE
              • Drops file in System32 directory
              • Modifies data under HKEY_USERS
              • Suspicious behavior: EnumeratesProcesses
              • Suspicious use of AdjustPrivilegeToken
              • Suspicious use of WriteProcessMemory
              PID:1536
              • C:\Windows\System32\cmd.exe
                "C:\Windows\System32\cmd.exe" /C netsh http add urlacl url=http://+:9007/ user=Everyone
                2⤵
                • Suspicious use of WriteProcessMemory
                PID:2812
                • C:\Windows\system32\netsh.exe
                  netsh http add urlacl url=http://+:9007/ user=Everyone
                  3⤵
                  • Modifies data under HKEY_USERS
                  PID:3960
              • C:\Windows\Microsoft.NET\Framework64\v3.5\csc.exe
                "C:\Windows\Microsoft.NET\Framework64\v3.5\csc.exe" /noconfig /fullpaths @"C:\Windows\TEMP\xwvdb-tt.cmdline"
                2⤵
                • Suspicious use of WriteProcessMemory
                PID:4356
                • C:\Windows\Microsoft.NET\Framework64\v2.0.50727\cvtres.exe
                  C:\Windows\Microsoft.NET\Framework64\v2.0.50727\cvtres.exe /NOLOGO /READONLY /MACHINE:IX86 "/OUT:C:\Windows\TEMP\RES3FBA.tmp" "c:\Windows\Temp\CSC3FB9.tmp"
                  3⤵
                    PID:2056
              • C:\Windows\Microsoft.Net\Framework64\v3.0\WPF\PresentationFontCache.exe
                C:\Windows\Microsoft.Net\Framework64\v3.0\WPF\PresentationFontCache.exe
                1⤵
                  PID:4628
                • C:\Windows\system32\taskmgr.exe
                  "C:\Windows\system32\taskmgr.exe" /4
                  1⤵
                  • Checks SCSI registry key(s)
                  • Suspicious behavior: EnumeratesProcesses
                  • Suspicious use of AdjustPrivilegeToken
                  • Suspicious use of FindShellTrayWindow
                  • Suspicious use of SendNotifyMessage
                  PID:3168

                Network

                MITRE ATT&CK Enterprise v6

                Replay Monitor

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                Downloads

                • memory/1536-107-0x00007FF8519C0000-0x00007FF852360000-memory.dmp

                  Filesize

                  9.6MB

                  Download

                • memory/1748-101-0x000000000CF90000-0x000000000CF91000-memory.dmp

                  Filesize

                  4KB

                  Download

                • memory/1748-98-0x000000006FE10000-0x00000000704FE000-memory.dmp

                  Filesize

                  6.9MB

                  Download

                • memory/4628-219-0x00007FF8519C0000-0x00007FF852360000-memory.dmp

                  Filesize

                  9.6MB

                  Download

                • memory/4936-203-0x000000000B290000-0x000000000B291000-memory.dmp

                  Filesize

                  4KB

                  Download

                • memory/4936-200-0x0000000070910000-0x0000000070FFE000-memory.dmp

                  Filesize

                  6.9MB

                  Download