General

  • Target

    winbio.exe

  • Size

    69KB

  • Sample

    240225-qf8yssdc2z

  • MD5

    2edbacd070d1949bb5d97d3a6e4e23f6

  • SHA1

    761168968a1d951848a36ad428ee4d05153f1e01

  • SHA256

    8894b6508e7b3d8759a53d0ac7a6ceb39fd63ba65b1e89be62b2acdce7781fdc

  • SHA512

    a4b282b8c91124a6dc465573842a03b5fcf346af6e561eef66ea405fcb784251044e2f8a2c0a61cbb0e29f7efc02a71d131930b70e2c021978d00c0b3c38f344

  • SSDEEP

    1536:juCWRxL7hbUiQfovecnXUU+hhOZuIWiFp+ZfaBZebC33O+MEYTb:KCWf7VJQfmeMXvkhOZu1iFBBZebC3+

Malware Config

Extracted

Path

C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Code Cache\js\index-dir\10BED9-Readme.txt

Family

netwalker

Ransom Note
Hi! Your files are encrypted by Netwalker. All encrypted files for this computer has extension: .10bed9 -- 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_10bed9: Zs1UfVW0NsW3xQCRoX2H3pNWTO7MfRrWVqkZokbZsAptNXa9OU ySEwaZKNIz5mwVvGwDt3u1RogKBqWp2vfh0FXFeXQHdBNgq/a6 0rsuRS976zTih0u9AxFvH7diuaqNrSzgTfJ82+pzbLfiXTnsMC JLVUyLpjpft86bQu2XGE8q80moHw6/ZaccFTcfyDJ2Cua8e16u qxsuItBhLrIig3VRxXzWYjlUfAl5eL0dqWtc9ffuq6/0VqvYuL W1W/BsCoLUn1R5FrkyXb73YJG9R2342+8VqT+LHQ==}
URLs

http://pb36hu4spl6cyjdfhing7h3pw6dhpk32ifemawkujj4gp33ejzdq3did.onion

http://rnfdsgm6wb6j6su5txkekw4u4y47kp2eatvu7d6xhyn5cs4lt4pdrqqd.onion

Extracted

Path

C:\ProgramData\Microsoft\User Account Pictures\1E9AE0-Readme.txt

Family

netwalker

Ransom Note
Hi! Your files are encrypted by Netwalker. All encrypted files for this computer has extension: .1e9ae0 -- 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_1e9ae0: mstNmMAGpEAj3qywSAFtp9etjdig4LKerTH1uceyXmeekvSzBZ BZoUlzW02sFnbrgBGVf/IVKAHlq2frLCeQFJRbXrgjeNsnq/a6 0uzyuJc5jYF/e8966bY75DregCxQCzrE6eboAnR/osjuwM8R+s agEW9pl4TG+inswNPcJkWiVEyjgP4QtQD8lYRhd01gtV+rgk8e CXwBGfSIFmQzWDyC9fbWYNOeJk79cT3JBWYIRzl+AG39O+a4NX liQSY20tUlb6sd7Gl7Zt5GYOFG6chDAv1A1G/z6g==}
URLs

http://pb36hu4spl6cyjdfhing7h3pw6dhpk32ifemawkujj4gp33ejzdq3did.onion

http://rnfdsgm6wb6j6su5txkekw4u4y47kp2eatvu7d6xhyn5cs4lt4pdrqqd.onion

Targets

    • Target

      winbio.exe

    • Size

      69KB

    • MD5

      2edbacd070d1949bb5d97d3a6e4e23f6

    • SHA1

      761168968a1d951848a36ad428ee4d05153f1e01

    • SHA256

      8894b6508e7b3d8759a53d0ac7a6ceb39fd63ba65b1e89be62b2acdce7781fdc

    • SHA512

      a4b282b8c91124a6dc465573842a03b5fcf346af6e561eef66ea405fcb784251044e2f8a2c0a61cbb0e29f7efc02a71d131930b70e2c021978d00c0b3c38f344

    • SSDEEP

      1536:juCWRxL7hbUiQfovecnXUU+hhOZuIWiFp+ZfaBZebC33O+MEYTb:KCWf7VJQfmeMXvkhOZu1iFBBZebC3+

    • Netwalker Ransomware

      Ransomware family with multiple versions. Also known as MailTo.

    • Deletes shadow copies

      Ransomware often targets backup files to inhibit system recovery.

    • Renames multiple (7433) files with added filename extension

      This suggests ransomware activity of encrypting all the files on the system.

    • Deletes itself

    • Reads user/profile data of web browsers

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

MITRE ATT&CK Matrix ATT&CK v13

Defense Evasion

Indicator Removal

2
T1070

File Deletion

2
T1070.004

Credential Access

Unsecured Credentials

1
T1552

Credentials In Files

1
T1552.001

Collection

Data from Local System

1
T1005

Impact

Inhibit System Recovery

2
T1490

Tasks