Oxygen Userdata Decryption Problem Fix Step By Step

Fixing the Oxygen Userdata Decryption Problem: A Step-by-Step Guide

If you're dealing with MTK-based devices and Oxygen fails to decrypt userdata, you're not alone. Many technicians encounter the dreaded "userdata won't be decrypted" message, especially when analyzing dump files from devices like the Samsung A022F or other MTK-powered phones. Here's a tested solution contributed by Younes Heydari (Telegram: @GSMPOWER2) that outlines how to resolve this using Pandora, CM2, and Oxygen tools.

🔧 Requirements

To proceed with the solution, you need:

• Pandora or CM2 software
• A device dump (read from the problematic device)
• Oxygen tool installed on your PC

📥 Step 1: Dump the Userdata

Use one of the tools to read the device dump:

• Pandora: Use the "Read Region" option.
• CM2: Use RawTool to dump the userdata.

Once done, rename the dump touserdata.bin.

🔑 Step 2: Extract Device Keys

There are two ways to get the  hardware decryption keys:

Option A: With MTKClient (Python)

Use the command:

Also read :CM2 Dongle Fault.bin Error { Warning Dongle Misconfiguration} 100 % Tested Method
python mtk da generatekeys

Option B: With Oxygen

1. Open Oxygen Tool
2. Go to the Extractor
3. Under MTK Android, select "Extract  Hardware Keys"
4. Connect and reconnect the device in MTK mode when prompted

This process will generate akeys.jsonfile containing all required keys like:

•  MTK_HRID
• MTK_SOCID
• MTK_FDEKEY
• MTK_RPMB2KEY, etc.

🛠 Step 3: Prepare the Oxygen Project

1. Copy theuserdata.binto the Oxygen Key Generate folder.
2. Create a new file nameddevice.ewc.
3. Open it in Notepad++ and paste the following:

[BaseInfo]

ExtractionEndUtc=
ExtractionMethod=
ExtractionStartUtc=

[ExtendedInfo]
KeyBagFile=keys.json
Partition 1 File=userdata.bin
Partition 1 Name=userdata
PartitionsCount=1

4. Save and place this file in the same folder asuserdata.binandkeys.json.

Now you have a complete Oxygen project with:

•  userdata.bin
• keys.json
• device.ewc

📂 Step 4: Parse with Oxygen

1. Open Oxygen
2. Navigate to Android → Physical-JTAG Image
3. Select thedevice.ewcfile

Oxygen may prompt you for a password or offer a brute-force option to decrypt.

⚠️ What If Oxygen Still Can't Decrypt?

If you still face issues, follow these steps:

1. Re-read userdata using CM2 or Pandora
2. Rename touserdata.binagain
3. Use CM2 or UMT to regenerate hardware keys
4. Replace the contents ofkeys.jsonwith your new keys. Example:

"MTK_HRID"
: "69b33af17876de894015b468595a9b10",
  "MTK_SOCID": "50CFE034B6FFB16987A8E41777F21E1DE5253C959CCD03F9D0F4D537CE1CD3A9",
  "MTK_FDEKEY": "FD6525903EB5300956A7236000FFC30B",
  ...
}

5. Save and retry the extraction in Oxygen.

✅ Tested Devices

This method has been successfully tested on:

•  Samsung A022F U3 OS11
• Galaxy A346
• Various other MTK-based models with decryption issues

📌 Final Words

This solution is credited to Younes Heydari from Iran. If you found this helpful or need further assistance, you can reach him on Telegram at: @GSMPOWER2

Download Links

https://www.blogger.com/blog/post/edit/4599127971849080432/6345821974229983209

https://rafisolution24.blogspot.com/2025/08/oxygen-userdata-decryption-problem-fix.html