Analysis

  • max time kernel
    155s
  • max time network
    167s
  • platform
    windows7_x64
  • resource
    win7v20201028
  • submitted
    09-11-2020 20:17

General

  • Target

    eb1470786fda58fc8291e099c7fcd5d36a04de85d1f6fe8683c1950b7119314e.dll

  • Size

    57KB

  • MD5

    cc113e42c52c6e4e7beca74829b89a68

  • SHA1

    5b165601b8d0b13a8833c31cb36644aea8121f74

  • SHA256

    eb1470786fda58fc8291e099c7fcd5d36a04de85d1f6fe8683c1950b7119314e

  • SHA512

    b18bafbf70140a334a8dca2c99c25dae0be448ee90c0eaf65a37d95990477f4da94f75311b4004c64c75bc52f2ac8be880c7bb82f33130ff8c9031edb7781a3c

Malware Config

Extracted

Path

C:\Users\Public\Libraries\EFA749-Readme.txt

Family

netwalker

Ransom Note
Hi! Your files are encrypted by Netwalker. All encrypted files for this computer has extension: .efa749 -- 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. -- 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_efa749: yFJP14/g9rGLHX4m3z0SInUx4GfzWJt1tMyzHNyd5zgeGd0h8q Jo0HUGmT1Lmb9k7mfyn8QjBVyFNSx6sHerzY9UeRsqEDdT65Yy i4RlcptHzXQSOF2Elm6/NSUmmSeY7wB+C3NH+TumE+rEUh9Mud FdAoMmhXCclDAQrKsxO92mDtp9PQrVC1yTYBYRqeDUC0CXqlZ6 IN11L/8iz6ecNAuOihH5awC9yXGADEtD83xKDclNNJE/oKRC/9 JPpRLNqtyoxsl0QMWFKYj2lwh99H1Pu/vqa2toGw==}
URLs

http://pb36hu4spl6cyjdfhing7h3pw6dhpk32ifemawkujj4gp33ejzdq3did.onion

http://rnfdsgm6wb6j6su5txkekw4u4y47kp2eatvu7d6xhyn5cs4lt4pdrqqd.onion

Extracted

Path

C:\ProgramData\Microsoft\Assistance\Client\1.0\en-US\EFA749-Readme.txt

Family

netwalker

Ransom Note
Hi! Your files are encrypted by Netwalker. All encrypted files for this computer has extension: .efa749 -- 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. -- 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_efa749: yFJP14/g9rGLHX4m3z0SInUx4GfzWJt1tMyzHNyd5zgeGd0h8q Jo0HUGmT1Lmb9k7mfyn8QjBVyFNSx6sHerzY9UeRsqEDdT65Yy i4RlcptHzXQSOF2Elm6/NSUmmSeY7wB+C3NH+TumE+rEUh9Mud FdAoMmhXCclDAQrKsxO92mDtp9PQrVC1yTYBYRqeDUC0CXqlZ6 IN11L/8iz6ecNAuOihH5awC9yXGADEtD83xKDclNNJE/oKRC/9 JPpRLNqtyoxsl0QMWFKYj2lwh99H1Pu/vqa2toGw==}Hi! Your files are encrypted by Netwalker. All encrypted files for this computer has extension: .efa749 -- 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. -- 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_efa749: yFJP14/g9rGLHX4m3z0SInUx4GfzWJt1tMyzHNyd5zgeGd0h8q Jo0HUGmT1Lmb9k7mfyn8QjBVyFNSx6sHerzY9UeRsqEDdT65Yy i4RlcptHzXQSOF2Elm6/NSUmmSeY7wB+C3NH+TumE+rEUh9Mud FdAoMmhXCclDAQrKsxO92mDtp9PQrVC1yTYBYRqeDUC0CXqlZ6 IN11L/8iz6ecNAuOihH5awC9yXGADEtD83xKDclNNJE/oKRC/9 JPpRLNqtyoxsl0QMWFKYj2lwh99H1Pu/vqa2toGw==}
URLs

http://pb36hu4spl6cyjdfhing7h3pw6dhpk32ifemawkujj4gp33ejzdq3did.onion

http://rnfdsgm6wb6j6su5txkekw4u4y47kp2eatvu7d6xhyn5cs4lt4pdrqqd.onion

Extracted

Path

C:\Program Files (x86)\Microsoft Office\Office14\BORDERS\EFA749-Readme.txt

Family

netwalker

Ransom Note
Hi! Your files are encrypted by Netwalker. All encrypted files for this computer has extension: .efa749 -- 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. -- 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_efa749: yFJP14/g9rGLHX4m3z0SInUx4GfzWJt1tMyzHNyd5zgeGd0h8q Jo0HUGmT1Lmb9k7mfyn8QjBVyFNSx6sHerzY9UeRsqEDdT65Yy i4RlcptHzXQSOF2Elm6/NSUmmSeY7wB+C3NH+TumE+rEUh9Mud FdAoMmhXCclDAQrKsxO92mDtp9PQrVC1yTYBYRqeDUC0CXqlZ6 IN11L/8iz6ecNAuOihH5awC9yXGADEtD83xKDclNNJE/oKRC/9 JPpRLNqtyoxsl0QMWFKYj2lwh99H1Pu/vqa2toGw==}Hi! Your files are encrypted by Netwalker. All encrypted files for this computer has extension: .efa749 -- 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. -- 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_efa749: yFJP14/g9rGLHX4m3z0SInUx4GfzWJt1tMyzHNyd5zgeGd0h8q Jo0HUGmT1Lmb9k7mfyn8QjBVyFNSx6sHerzY9UeRsqEDdT65Yy i4RlcptHzXQSOF2Elm6/NSUmmSeY7wB+C3NH+TumE+rEUh9Mud FdAoMmhXCclDAQrKsxO92mDtp9PQrVC1yTYBYRqeDUC0CXqlZ6 IN11L/8iz6ecNAuOihH5awC9yXGADEtD83xKDclNNJE/oKRC/9 JPpRLNqtyoxsl0QMWFKYj2lwh99H1Pu/vqa2toGw==}Hi! Your files are encrypted by Netwalker. All encrypted files for this computer has extension: .efa749 -- 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. -- 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_efa749: yFJP14/g9rGLHX4m3z0SInUx4GfzWJt1tMyzHNyd5zgeGd0h8q Jo0HUGmT1Lmb9k7mfyn8QjBVyFNSx6sHerzY9UeRsqEDdT65Yy i4RlcptHzXQSOF2Elm6/NSUmmSeY7wB+C3NH+TumE+rEUh9Mud FdAoMmhXCclDAQrKsxO92mDtp9PQrVC1yTYBYRqeDUC0CXqlZ6 IN11L/8iz6ecNAuOihH5awC9yXGADEtD83xKDclNNJE/oKRC/9 JPpRLNqtyoxsl0QMWFKYj2lwh99H1Pu/vqa2toGw==}Hi! Your files are encrypted by Netwalker. All encrypted files for this computer has extension: .efa749 -- 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. -- 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_efa749: yFJP14/g9rGLHX4m3z0SInUx4GfzWJt1tMyzHNyd5zgeGd0h8q Jo0HUGmT1Lmb9k7mfyn8QjBVyFNSx6sHerzY9UeRsqEDdT65Yy i4RlcptHzXQSOF2Elm6/NSUmmSeY7wB+C3NH+TumE+rEUh9Mud FdAoMmhXCclDAQrKsxO92mDtp9PQrVC1yTYBYRqeDUC0CXqlZ6 IN11L/8iz6ecNAuOihH5awC9yXGADEtD83xKDclNNJE/oKRC/9 JPpRLNqtyoxsl0QMWFKYj2lwh99H1Pu/vqa2toGw==}
URLs

http://pb36hu4spl6cyjdfhing7h3pw6dhpk32ifemawkujj4gp33ejzdq3did.onion

http://rnfdsgm6wb6j6su5txkekw4u4y47kp2eatvu7d6xhyn5cs4lt4pdrqqd.onion

Extracted

Path

C:\Program Files (x86)\Microsoft Office\Stationery\1033\EFA749-Readme.txt

Family

netwalker

Ransom Note
Hi! Your files are encrypted by Netwalker. All encrypted files for this computer has extension: .efa749 -- 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. -- 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_efa749: yFJP14/g9rGLHX4m3z0SInUx4GfzWJt1tMyzHNyd5zgeGd0h8q Jo0HUGmT1Lmb9k7mfyn8QjBVyFNSx6sHerzY9UeRsqEDdT65Yy i4RlcptHzXQSOF2Elm6/NSUmmSeY7wB+C3NH+TumE+rEUh9Mud FdAoMmhXCclDAQrKsxO92mDtp9PQrVC1yTYBYRqeDUC0CXqlZ6 IN11L/8iz6ecNAuOihH5awC9yXGADEtD83xKDclNNJE/oKRC/9 JPpRLNqtyoxsl0QMWFKYj2lwh99H1Pu/vqa2toGw==}Hi! Your files are encrypted by Netwalker. All encrypted files for this computer has extension: .efa749 -- 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. -- 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_efa749: yFJP14/g9rGLHX4m3z0SInUx4GfzWJt1tMyzHNyd5zgeGd0h8q Jo0HUGmT1Lmb9k7mfyn8QjBVyFNSx6sHerzY9UeRsqEDdT65Yy i4RlcptHzXQSOF2Elm6/NSUmmSeY7wB+C3NH+TumE+rEUh9Mud FdAoMmhXCclDAQrKsxO92mDtp9PQrVC1yTYBYRqeDUC0CXqlZ6 IN11L/8iz6ecNAuOihH5awC9yXGADEtD83xKDclNNJE/oKRC/9 JPpRLNqtyoxsl0QMWFKYj2lwh99H1Pu/vqa2toGw==}Hi! Your files are encrypted by Netwalker. All encrypted files for this computer has extension: .efa749 -- 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. -- 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_efa749: yFJP14/g9rGLHX4m3z0SInUx4GfzWJt1tMyzHNyd5zgeGd0h8q Jo0HUGmT1Lmb9k7mfyn8QjBVyFNSx6sHerzY9UeRsqEDdT65Yy i4RlcptHzXQSOF2Elm6/NSUmmSeY7wB+C3NH+TumE+rEUh9Mud FdAoMmhXCclDAQrKsxO92mDtp9PQrVC1yTYBYRqeDUC0CXqlZ6 IN11L/8iz6ecNAuOihH5awC9yXGADEtD83xKDclNNJE/oKRC/9 JPpRLNqtyoxsl0QMWFKYj2lwh99H1Pu/vqa2toGw==}
URLs

http://pb36hu4spl6cyjdfhing7h3pw6dhpk32ifemawkujj4gp33ejzdq3did.onion

http://rnfdsgm6wb6j6su5txkekw4u4y47kp2eatvu7d6xhyn5cs4lt4pdrqqd.onion

Signatures

  • Netwalker Ransomware

    Ransomware family with multiple versions. Also known as MailTo.

  • Modifies extensions of user files 1 IoCs

    Ransomware generally changes the extension on encrypted files.

  • Reads user/profile data of web browsers 2 TTPs

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

  • Drops file in Program Files directory 7480 IoCs
  • Suspicious behavior: EnumeratesProcesses 16 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 11 IoCs

Processes

  • C:\Windows\system32\rundll32.exe
    rundll32.exe C:\Users\Admin\AppData\Local\Temp\eb1470786fda58fc8291e099c7fcd5d36a04de85d1f6fe8683c1950b7119314e.dll,#1
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:380
    • C:\Windows\SysWOW64\rundll32.exe
      rundll32.exe C:\Users\Admin\AppData\Local\Temp\eb1470786fda58fc8291e099c7fcd5d36a04de85d1f6fe8683c1950b7119314e.dll,#1
      2⤵
      • Modifies extensions of user files
      • Drops file in Program Files directory
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:1560
      • C:\Windows\SysWOW64\notepad.exe
        C:\Windows\system32\notepad.exe "C:\Users\Admin\Desktop\EFA749-Readme.txt"
        3⤵
          PID:7924

    Network

    MITRE ATT&CK Matrix ATT&CK v6

    Credential Access

    Credentials in Files

    1
    T1081

    Collection

    Data from Local System

    1
    T1005

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\Desktop\EFA749-Readme.txt
      MD5

      32c558876244e22347ff49ea9ea01858

      SHA1

      43f14a0c21939ad56abcbf643baa2829450a41cd

      SHA256

      f278660ae38ed072be640adc38d0caeeb9ce82bd128af02c801cf0321a59de78

      SHA512

      6a16633a0b3e84152b38c96d7c318e24f40e21fc6b132c50080241cee9b8a4c421aa72899fa3daa93b71c6a308107dbca38416f1f688a553156ada8ca4ede9b0

    • memory/1560-0-0x0000000000000000-mapping.dmp
    • memory/7924-1-0x0000000000000000-mapping.dmp