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Agile.NET: Fix delegate deobfuscation for some binaries #12

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Merged
meck-gd merged 2 commits into from
Nov 20, 2025
Merged

Agile.NET: Fix delegate deobfuscation for some binaries #12

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b219f3e
Agile.NET: Fix delegate deobfuscation for some binaries
meck-gd Nov 20, 2025
6146a98
Fix C# 14.0 compatibility
meck-gd Nov 20, 2025
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12 changes: 12 additions & 0 deletions de4dot.code/deobfuscators/Agile_NET/ProxyCallFixer.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -18,6 +18,7 @@ You should have received a copy of the GNU General Public License
*/

using System;
using de4dot.blocks;
using dnlib.DotNet;
using dnlib.DotNet.Emit;

Expand All @@ -41,6 +42,17 @@ public void FindDelegateCreator() {
SetDelegateCreatorMethod(method);
return;
}
// Sometimes, the method name is different.
if (method.IsStatic && !method.IsStaticConstructor && DotNetUtils.IsMethod(method, "System.Void", "(System.Int32)")) {
var instrs = DotNetUtils.GetInstructions(method.Body.Instructions, 0, OpCodes.Ldsflda,
OpCodes.Ldc_I4, OpCodes.Ldarg_0, OpCodes.Add, OpCodes.Call, OpCodes.Call);
if (instrs != null && instrs[1].GetLdcI4Value() == 0x2000001
// This is important to differentiate from SmartAssembly
&& DotNetUtils.CallsMethod(method, "System.Byte[] System.Convert::FromBase64String(System.String)")) {
SetDelegateCreatorMethod(method);
return;
}
}
}
}
}
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6 changes: 3 additions & 3 deletions de4dot.code/deobfuscators/Confuser/ProxyCallFixer.cs
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Expand Up @@ -115,10 +115,10 @@ public IEnumerable<FieldDef> Fields {
var fields = new List<FieldDef>(fieldToMethods.GetKeys());
var type = DotNetUtils.GetModuleType(module);
if (fields.Count > 0 && type != null) {
foreach (var field in type.Fields) {
var fieldType = field.FieldType.TryGetTypeDef();
foreach (var tField in type.Fields) {
var fieldType = tField.FieldType.TryGetTypeDef();
if (fieldType != null && delegateTypesDict.ContainsKey(fieldType))
fields.Add(field);
fields.Add(tField);
}
}
return fields;
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