Overview

overview

10

Static

static

10

NetwalkerNEW.exe

windows7_x64

10

NetwalkerNEW.exe

windows10_x64

10

Analysis

  • max time kernel
    62s
  • max time network
    32s
  • platform
    windows7_x64
  • resource
    win7v20201028
  • submitted
    03-03-2021 12:22

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General

  • Target

    NetwalkerNEW.exe

  • Size

    69KB

  • MD5

    e9ca5e3e3e381d7f13f20f9ef7b2cd48

  • SHA1

    89e45b950d550f140bfbee81e709d53632e55af2

  • SHA256

    4a8e4c9289132e7d3ac9172179464c4c8038079ad9ff7205da81c6af9d1e2354

  • SHA512

    ff301d34795ac651d020b8cd7e6626735c0b1ab48800cf957894ab775f5594cb2abe79746e1dc0e4288e7f156bab0dcf582fe9d8724b3ddee6154ea8c43ae59e

Score
10/10
ransomwarespyware

Malware Config

Extracted

Path

C:\ProgramData\Microsoft\User Account Pictures\163D19-Readme.txt

Ransom Note
Hello, O2MICRO. Your files are encrypted by Netwalker. All encrypted files for this computer has extension: .163d19 -- If for some reason you read this text before the encryption ended, this can be understood by the fact that the computer slows down, and your heart rate has increased due to the ability to turn it off, then we recommend that you move away from the computer and accept that you have been compromised. Rebooting/shutdown will cause you to lose files without the possibility of recovery. -- Our encryption algorithms are very strong and your files are very well protected, the only way to get your files back is to cooperate with us and get the decrypter program. Do not try to recover your files without a decrypter program, you may damage them and then they will be impossible to recover. For us this is just business and to prove to you our seriousness, we will decrypt you one file for free. Just open our website, upload the encrypted file and get the decrypted file for free. -- *** We have downloaded your documents, databases, documents of your customers, correspondence. We are ready to put everything in public access. Contact us in chat. *** -- Steps to get access on our website: 1.Download and install tor-browser: https://torproject.org/ 2.Open our website: pb36hu4spl6cyjdfhing7h3pw6dhpk32ifemawkujj4gp33ejzdq3did.onion If the website is not available, open another one: rnfdsgm6wb6j6su5txkekw4u4y47kp2eatvu7d6xhyn5cs4lt4pdrqqd.onion 3.Put your personal code in the input form: {code_163d19: qa85E+Q9ybJPBsLiV2HnvDCGE5VLUpQ8kDGPZ8f78TrUWYIXCz BdTs+7mm36Lvr3ynxuw1tqxYIrybKa3rwvRx0bwZnHg1hTEXt0 VMg4yx/5Erw+qj7VXAui8mDqUOaOXPouIRPNM7x1vfkACDcdZW JM8AUT1tijYA8r+z81D3lduPCuN/ROyzkcbUFuPFiQ8eGXdaf3 S4FyAUrkQlDslmlYplhTDEczsKeV4vu6VHboCMNwDQ8ZtDm6gt oucqSVQ5ji+IEyYKsEtaASdcc9UQyAO0n8qPos7w==}
URLs

http://pb36hu4spl6cyjdfhing7h3pw6dhpk32ifemawkujj4gp33ejzdq3did.onion

http://rnfdsgm6wb6j6su5txkekw4u4y47kp2eatvu7d6xhyn5cs4lt4pdrqqd.onion

Extracted

Path

C:\Program Files (x86)\Microsoft Office\Office14\PROOF\163D19-Readme.txt

Ransom Note
Hello, O2MICRO. Your files are encrypted by Netwalker. All encrypted files for this computer has extension: .163d19 -- If for some reason you read this text before the encryption ended, this can be understood by the fact that the computer slows down, and your heart rate has increased due to the ability to turn it off, then we recommend that you move away from the computer and accept that you have been compromised. Rebooting/shutdown will cause you to lose files without the possibility of recovery. -- Our encryption algorithms are very strong and your files are very well protected, the only way to get your files back is to cooperate with us and get the decrypter program. Do not try to recover your files without a decrypter program, you may damage them and then they will be impossible to recover. For us this is just business and to prove to you our seriousness, we will decrypt you one file for free. Just open our website, upload the encrypted file and get the decrypted file for free. -- *** We have downloaded your documents, databases, documents of your customers, correspondence. We are ready to put everything in public access. Contact us in chat. *** -- Steps to get access on our website: 1.Download and install tor-browser: https://torproject.org/ 2.Open our website: pb36hu4spl6cyjdfhing7h3pw6dhpk32ifemawkujj4gp33ejzdq3did.onion If the website is not available, open another one: rnfdsgm6wb6j6su5txkekw4u4y47kp2eatvu7d6xhyn5cs4lt4pdrqqd.onion 3.Put your personal code in the input form: {code_163d19: qa85E+Q9ybJPBsLiV2HnvDCGE5VLUpQ8kDGPZ8f78TrUWYIXCz BdTs+7mm36Lvr3ynxuw1tqxYIrybKa3rwvRx0bwZnHg1hTEXt0 VMg4yx/5Erw+qj7VXAui8mDqUOaOXPouIRPNM7x1vfkACDcdZW JM8AUT1tijYA8r+z81D3lduPCuN/ROyzkcbUFuPFiQ8eGXdaf3 S4FyAUrkQlDslmlYplhTDEczsKeV4vu6VHboCMNwDQ8ZtDm6gt oucqSVQ5ji+IEyYKsEtaASdcc9UQyAO0n8qPos7w==}Hello, O2MICRO. Your files are encrypted by Netwalker. All encrypted files for this computer has extension: .163d19 -- If for some reason you read this text before the encryption ended, this can be understood by the fact that the computer slows down, and your heart rate has increased due to the ability to turn it off, then we recommend that you move away from the computer and accept that you have been compromised. Rebooting/shutdown will cause you to lose files without the possibility of recovery. -- Our encryption algorithms are very strong and your files are very well protected, the only way to get your files back is to cooperate with us and get the decrypter program. Do not try to recover your files without a decrypter program, you may damage them and then they will be impossible to recover. For us this is just business and to prove to you our seriousness, we will decrypt you one file for free. Just open our website, upload the encrypted file and get the decrypted file for free. -- *** We have downloaded your documents, databases, documents of your customers, correspondence. We are ready to put everything in public access. Contact us in chat. *** -- Steps to get access on our website: 1.Download and install tor-browser: https://torproject.org/ 2.Open our website: pb36hu4spl6cyjdfhing7h3pw6dhpk32ifemawkujj4gp33ejzdq3did.onion If the website is not available, open another one: rnfdsgm6wb6j6su5txkekw4u4y47kp2eatvu7d6xhyn5cs4lt4pdrqqd.onion 3.Put your personal code in the input form: {code_163d19: qa85E+Q9ybJPBsLiV2HnvDCGE5VLUpQ8kDGPZ8f78TrUWYIXCz BdTs+7mm36Lvr3ynxuw1tqxYIrybKa3rwvRx0bwZnHg1hTEXt0 VMg4yx/5Erw+qj7VXAui8mDqUOaOXPouIRPNM7x1vfkACDcdZW JM8AUT1tijYA8r+z81D3lduPCuN/ROyzkcbUFuPFiQ8eGXdaf3 S4FyAUrkQlDslmlYplhTDEczsKeV4vu6VHboCMNwDQ8ZtDm6gt oucqSVQ5ji+IEyYKsEtaASdcc9UQyAO0n8qPos7w==}Hello, O2MICRO. Your files are encrypted by Netwalker. All encrypted files for this computer has extension: .163d19 -- If for some reason you read this text before the encryption ended, this can be understood by the fact that the computer slows down, and your heart rate has increased due to the ability to turn it off, then we recommend that you move away from the computer and accept that you have been compromised. Rebooting/shutdown will cause you to lose files without the possibility of recovery. -- Our encryption algorithms are very strong and your files are very well protected, the only way to get your files back is to cooperate with us and get the decrypter program. Do not try to recover your files without a decrypter program, you may damage them and then they will be impossible to recover. For us this is just business and to prove to you our seriousness, we will decrypt you one file for free. Just open our website, upload the encrypted file and get the decrypted file for free. -- *** We have downloaded your documents, databases, documents of your customers, correspondence. We are ready to put everything in public access. Contact us in chat. *** -- Steps to get access on our website: 1.Download and install tor-browser: https://torproject.org/ 2.Open our website: pb36hu4spl6cyjdfhing7h3pw6dhpk32ifemawkujj4gp33ejzdq3did.onion If the website is not available, open another one: rnfdsgm6wb6j6su5txkekw4u4y47kp2eatvu7d6xhyn5cs4lt4pdrqqd.onion 3.Put your personal code in the input form: {code_163d19: qa85E+Q9ybJPBsLiV2HnvDCGE5VLUpQ8kDGPZ8f78TrUWYIXCz BdTs+7mm36Lvr3ynxuw1tqxYIrybKa3rwvRx0bwZnHg1hTEXt0 VMg4yx/5Erw+qj7VXAui8mDqUOaOXPouIRPNM7x1vfkACDcdZW JM8AUT1tijYA8r+z81D3lduPCuN/ROyzkcbUFuPFiQ8eGXdaf3 S4FyAUrkQlDslmlYplhTDEczsKeV4vu6VHboCMNwDQ8ZtDm6gt oucqSVQ5ji+IEyYKsEtaASdcc9UQyAO0n8qPos7w==}Hello, O2MICRO. Your files are encrypted by Netwalker. All encrypted files for this computer has extension: .163d19 -- If for some reason you read this text before the encryption ended, this can be understood by the fact that the computer slows down, and your heart rate has increased due to the ability to turn it off, then we recommend that you move away from the computer and accept that you have been compromised. Rebooting/shutdown will cause you to lose files without the possibility of recovery. -- Our encryption algorithms are very strong and your files are very well protected, the only way to get your files back is to cooperate with us and get the decrypter program. Do not try to recover your files without a decrypter program, you may damage them and then they will be impossible to recover. For us this is just business and to prove to you our seriousness, we will decrypt you one file for free. Just open our website, upload the encrypted file and get the decrypted file for free. -- *** We have downloaded your documents, databases, documents of your customers, correspondence. We are ready to put everything in public access. Contact us in chat. *** -- Steps to get access on our website: 1.Download and install tor-browser: https://torproject.org/ 2.Open our website: pb36hu4spl6cyjdfhing7h3pw6dhpk32ifemawkujj4gp33ejzdq3did.onion If the website is not available, open another one: rnfdsgm6wb6j6su5txkekw4u4y47kp2eatvu7d6xhyn5cs4lt4pdrqqd.onion 3.Put your personal code in the input form: {code_163d19: qa85E+Q9ybJPBsLiV2HnvDCGE5VLUpQ8kDGPZ8f78TrUWYIXCz BdTs+7mm36Lvr3ynxuw1tqxYIrybKa3rwvRx0bwZnHg1hTEXt0 VMg4yx/5Erw+qj7VXAui8mDqUOaOXPouIRPNM7x1vfkACDcdZW JM8AUT1tijYA8r+z81D3lduPCuN/ROyzkcbUFuPFiQ8eGXdaf3 S4FyAUrkQlDslmlYplhTDEczsKeV4vu6VHboCMNwDQ8ZtDm6gt oucqSVQ5ji+IEyYKsEtaASdcc9UQyAO0n8qPos7w==}
URLs

http://pb36hu4spl6cyjdfhing7h3pw6dhpk32ifemawkujj4gp33ejzdq3did.onion

http://rnfdsgm6wb6j6su5txkekw4u4y47kp2eatvu7d6xhyn5cs4lt4pdrqqd.onion

Extracted

Path

C:\Program Files (x86)\Microsoft Office\Stationery\1033\163D19-Readme.txt

Ransom Note
Hello, O2MICRO. Your files are encrypted by Netwalker. All encrypted files for this computer has extension: .163d19 -- If for some reason you read this text before the encryption ended, this can be understood by the fact that the computer slows down, and your heart rate has increased due to the ability to turn it off, then we recommend that you move away from the computer and accept that you have been compromised. Rebooting/shutdown will cause you to lose files without the possibility of recovery. -- Our encryption algorithms are very strong and your files are very well protected, the only way to get your files back is to cooperate with us and get the decrypter program. Do not try to recover your files without a decrypter program, you may damage them and then they will be impossible to recover. For us this is just business and to prove to you our seriousness, we will decrypt you one file for free. Just open our website, upload the encrypted file and get the decrypted file for free. -- *** We have downloaded your documents, databases, documents of your customers, correspondence. We are ready to put everything in public access. Contact us in chat. *** -- Steps to get access on our website: 1.Download and install tor-browser: https://torproject.org/ 2.Open our website: pb36hu4spl6cyjdfhing7h3pw6dhpk32ifemawkujj4gp33ejzdq3did.onion If the website is not available, open another one: rnfdsgm6wb6j6su5txkekw4u4y47kp2eatvu7d6xhyn5cs4lt4pdrqqd.onion 3.Put your personal code in the input form: {code_163d19: qa85E+Q9ybJPBsLiV2HnvDCGE5VLUpQ8kDGPZ8f78TrUWYIXCz BdTs+7mm36Lvr3ynxuw1tqxYIrybKa3rwvRx0bwZnHg1hTEXt0 VMg4yx/5Erw+qj7VXAui8mDqUOaOXPouIRPNM7x1vfkACDcdZW JM8AUT1tijYA8r+z81D3lduPCuN/ROyzkcbUFuPFiQ8eGXdaf3 S4FyAUrkQlDslmlYplhTDEczsKeV4vu6VHboCMNwDQ8ZtDm6gt oucqSVQ5ji+IEyYKsEtaASdcc9UQyAO0n8qPos7w==}Hello, O2MICRO. Your files are encrypted by Netwalker. All encrypted files for this computer has extension: .163d19 -- If for some reason you read this text before the encryption ended, this can be understood by the fact that the computer slows down, and your heart rate has increased due to the ability to turn it off, then we recommend that you move away from the computer and accept that you have been compromised. Rebooting/shutdown will cause you to lose files without the possibility of recovery. -- Our encryption algorithms are very strong and your files are very well protected, the only way to get your files back is to cooperate with us and get the decrypter program. Do not try to recover your files without a decrypter program, you may damage them and then they will be impossible to recover. For us this is just business and to prove to you our seriousness, we will decrypt you one file for free. Just open our website, upload the encrypted file and get the decrypted file for free. -- *** We have downloaded your documents, databases, documents of your customers, correspondence. We are ready to put everything in public access. Contact us in chat. *** -- Steps to get access on our website: 1.Download and install tor-browser: https://torproject.org/ 2.Open our website: pb36hu4spl6cyjdfhing7h3pw6dhpk32ifemawkujj4gp33ejzdq3did.onion If the website is not available, open another one: rnfdsgm6wb6j6su5txkekw4u4y47kp2eatvu7d6xhyn5cs4lt4pdrqqd.onion 3.Put your personal code in the input form: {code_163d19: qa85E+Q9ybJPBsLiV2HnvDCGE5VLUpQ8kDGPZ8f78TrUWYIXCz BdTs+7mm36Lvr3ynxuw1tqxYIrybKa3rwvRx0bwZnHg1hTEXt0 VMg4yx/5Erw+qj7VXAui8mDqUOaOXPouIRPNM7x1vfkACDcdZW JM8AUT1tijYA8r+z81D3lduPCuN/ROyzkcbUFuPFiQ8eGXdaf3 S4FyAUrkQlDslmlYplhTDEczsKeV4vu6VHboCMNwDQ8ZtDm6gt oucqSVQ5ji+IEyYKsEtaASdcc9UQyAO0n8qPos7w==}Hello, O2MICRO. Your files are encrypted by Netwalker. All encrypted files for this computer has extension: .163d19 -- If for some reason you read this text before the encryption ended, this can be understood by the fact that the computer slows down, and your heart rate has increased due to the ability to turn it off, then we recommend that you move away from the computer and accept that you have been compromised. Rebooting/shutdown will cause you to lose files without the possibility of recovery. -- Our encryption algorithms are very strong and your files are very well protected, the only way to get your files back is to cooperate with us and get the decrypter program. Do not try to recover your files without a decrypter program, you may damage them and then they will be impossible to recover. For us this is just business and to prove to you our seriousness, we will decrypt you one file for free. Just open our website, upload the encrypted file and get the decrypted file for free. -- *** We have downloaded your documents, databases, documents of your customers, correspondence. We are ready to put everything in public access. Contact us in chat. *** -- Steps to get access on our website: 1.Download and install tor-browser: https://torproject.org/ 2.Open our website: pb36hu4spl6cyjdfhing7h3pw6dhpk32ifemawkujj4gp33ejzdq3did.onion If the website is not available, open another one: rnfdsgm6wb6j6su5txkekw4u4y47kp2eatvu7d6xhyn5cs4lt4pdrqqd.onion 3.Put your personal code in the input form: {code_163d19: qa85E+Q9ybJPBsLiV2HnvDCGE5VLUpQ8kDGPZ8f78TrUWYIXCz BdTs+7mm36Lvr3ynxuw1tqxYIrybKa3rwvRx0bwZnHg1hTEXt0 VMg4yx/5Erw+qj7VXAui8mDqUOaOXPouIRPNM7x1vfkACDcdZW JM8AUT1tijYA8r+z81D3lduPCuN/ROyzkcbUFuPFiQ8eGXdaf3 S4FyAUrkQlDslmlYplhTDEczsKeV4vu6VHboCMNwDQ8ZtDm6gt oucqSVQ5ji+IEyYKsEtaASdcc9UQyAO0n8qPos7w==}
URLs

http://pb36hu4spl6cyjdfhing7h3pw6dhpk32ifemawkujj4gp33ejzdq3did.onion

http://rnfdsgm6wb6j6su5txkekw4u4y47kp2eatvu7d6xhyn5cs4lt4pdrqqd.onion

Signatures

  • Deletes shadow copies 2 TTPs

    Ransomware often targets backup files to inhibit system recovery.

    ransomware
  • Modifies extensions of user files 3 IoCs

    Ransomware generally changes the extension on encrypted files.

    ransomware
  • Deletes itself 1 IoCs
  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

    spyware
  • Drops file in Program Files directory 64 IoCs
  • Interacts with shadow copies 2 TTPs 1 IoCs

    Shadow copies are often targeted by ransomware to inhibit system recovery.

    ransomware
  • Kills process with taskkill 1 IoCs
    evasion
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 6 IoCs
  • Suspicious use of WriteProcessMemory 16 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\NetwalkerNEW.exe
    "C:\Users\Admin\AppData\Local\Temp\NetwalkerNEW.exe"
    1⤵
    • Modifies extensions of user files
    • Drops file in Program Files directory
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:384
    • C:\Windows\system32\vssadmin.exe
      C:\Windows\system32\vssadmin.exe delete shadows /all /quiet
      2⤵
      • Interacts with shadow copies
      PID:1988
    • C:\Windows\SysWOW64\notepad.exe
      C:\Windows\system32\notepad.exe "C:\Users\Admin\Desktop\163D19-Readme.txt"
      2⤵
        PID:4548
      • C:\Windows\SysWOW64\cmd.exe
        cmd /c "C:\Users\Admin\AppData\Local\Temp\27AC.tmp.bat"
        2⤵
        • Deletes itself
        • Suspicious use of WriteProcessMemory
        PID:6232
        • C:\Windows\SysWOW64\taskkill.exe
          taskkill /F /PID 384
          3⤵
          • Kills process with taskkill
          • Suspicious use of AdjustPrivilegeToken
          PID:2388
    • C:\Windows\system32\vssvc.exe
      C:\Windows\system32\vssvc.exe
      1⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:7892

    Network

    MITRE ATT&CK Matrix ATT&CK v6

    Initial Access

    Execution

    Persistence

    Privilege Escalation

    Defense Evasion

    File Deletion

    2
    T1107

    Credential Access

    Credentials in Files

    1
    T1081

    Discovery

    Lateral Movement

    Collection

    Data from Local System

    1
    T1005

    Exfiltration

    Command and Control

    Impact

    Inhibit System Recovery

    2
    T1490

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\Local\Temp\27AC.tmp.bat
      MD5

      096e44b3ed2b481fc2f722cd4cafa850

      SHA1

      fdf5ea9e0cc81a040e736f2264d0965de4c86f4f

      SHA256

      c620d26256891a35fbb5f02fa17f502fc84a9cd072373d3b467f6bf9f83d184c

      SHA512

      253356bc7d4041572065eb725ff9591ca62663e7db387fc140d6e3e5df49acea27a96da976d9caf8c518b203236065416239143fb285177202ef18affd5c09bc

      Download Submit
    • C:\Users\Admin\Desktop\163D19-Readme.txt
      MD5

      8e3baf6122fc79fa800be6bc46a985af

      SHA1

      24c2daeee0ae318a335787a56f55a0ac97dc9229

      SHA256

      6c0d8d030ae2e7c050ae6caee2501933968d07f12cda27c2721644125d50bea9

      SHA512

      0425dd435aa506dab2a440536822c28f328f98ab476ee68cace1069f739d32cf4d7db5c2c1b10feabc6c582525b31802e383c540691519dae88f21eaf3108481

      Download Submit
    • memory/384-2-0x0000000076241000-0x0000000076243000-memory.dmp
      Filesize

      8KB

      Download
    • memory/1988-3-0x0000000000000000-mapping.dmp
      Download
    • memory/2388-8-0x0000000000000000-mapping.dmp
      Download
    • memory/4548-4-0x0000000000000000-mapping.dmp
      Download
    • memory/6232-6-0x0000000000000000-mapping.dmp
      Download