Overview

overview

10

Static

static

10

5d869c0e07...12.exe

windows7_x64

10

5d869c0e07...12.exe

windows10-2004_x64

10

Analysis

  • max time kernel
    150s
  • max time network
    135s
  • platform
    windows7_x64
  • resource
    win7-20220414-en
  • submitted
    30-05-2022 11:43

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General

  • Target

    5d869c0e077596bf0834f08dce062af1477bf09c8f6aa0a45d6a080478e45512.exe

  • Size

    69KB

  • MD5

    c0bf14556a1563cea82f34b0faf70822

  • SHA1

    e6e232fa7cc93f11bf63487066adccd02006f214

  • SHA256

    5d869c0e077596bf0834f08dce062af1477bf09c8f6aa0a45d6a080478e45512

  • SHA512

    0b23ec04e88a5152ed3fbd2d4927f543ea756c269ea06d93daacdd57a5a88bafbb7fb556764bc4a1532dfe2003ba4ad191fc259121d3ce685d76489d7c4afc42

Score
10/10
netwalkerransomwarespywarestealer

Malware Config

Extracted

Path

C:\Users\Admin\Desktop\331BD1-Readme.txt

Family

netwalker

Ransom Note
Hi! Your files are encrypted. All encrypted files for this computer has extension: .331bd1 -- 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. Additionally, your data may have been stolen and if you do not cooperate with us, it will become publicly available on our blog. -- 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_331bd1: RBISJFd3UH1kw21NEtgrhKq+Zs7iDdgSFg+HqM0FVKtoAmhccc UUfMsIkwooIxmoAkBeQprv1srZyu54t8yfZH4lYTw7+8cXNp6R qoTPWel0hMYqiZyRWzlV54CeRVp79bV8feEOsAcfLcK1hk52pq WzVnRKIVurA2Z1CJ9UcWqV3UzzaytG6Br2k1P/rWgpnsl8aPZT ft+9AA/g+QJBGIbNK8fLOtgicPUOkC2JMEl/4mmNy60kVBmxVP U1oTMsAeLDG+Y4NWc1TuwY2nwJyRbv1YXSdewuYw==}
URLs

http://pb36hu4spl6cyjdfhing7h3pw6dhpk32ifemawkujj4gp33ejzdq3did.onion

http://rnfdsgm6wb6j6su5txkekw4u4y47kp2eatvu7d6xhyn5cs4lt4pdrqqd.onion

Signatures

  • Netwalker Ransomware

    Ransomware family with multiple versions. Also known as MailTo.

    ransomwarenetwalker
  • 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.

    spywarestealer
  • 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 FindShellTrayWindow 1 IoCs
  • Suspicious use of WriteProcessMemory 16 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\5d869c0e077596bf0834f08dce062af1477bf09c8f6aa0a45d6a080478e45512.exe
    "C:\Users\Admin\AppData\Local\Temp\5d869c0e077596bf0834f08dce062af1477bf09c8f6aa0a45d6a080478e45512.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:2036
    • C:\Windows\system32\vssadmin.exe
      C:\Windows\system32\vssadmin.exe delete shadows /all /quiet
      2⤵
      • Interacts with shadow copies
      PID:1612
    • C:\Windows\SysWOW64\notepad.exe
      C:\Windows\system32\notepad.exe "C:\Users\Admin\Desktop\331BD1-Readme.txt"
      2⤵
      • Suspicious use of FindShellTrayWindow
      PID:2528
    • C:\Windows\SysWOW64\cmd.exe
      cmd /c "C:\Users\Admin\AppData\Local\Temp\FAB.tmp.bat"
      2⤵
      • Deletes itself
      • Suspicious use of WriteProcessMemory
      PID:7912
      • C:\Windows\SysWOW64\taskkill.exe
        taskkill /F /PID 2036
        3⤵
        • Kills process with taskkill
        • Suspicious use of AdjustPrivilegeToken
        PID:4292
  • C:\Windows\system32\vssvc.exe
    C:\Windows\system32\vssvc.exe
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:7640

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\FAB.tmp.bat
    Filesize

    141B

    MD5

    db1e7e196655f4e3bd2ed68faa2e8254

    SHA1

    954f4ba8d428b468b9a1a52596067f2c8aadd3eb

    SHA256

    e44b47c1534f6cd313b6b944ce2fe14e1303e7c6057383a9a52c1712e9665105

    SHA512

    ab8f807c74d692b70ab204ea988bd18fa05b747631aa234f429b65d907587d660a17d01f165d9ed10cf9d329f2c5bebb50c4fdccc52c5976be3a9203682ae733

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  • C:\Users\Admin\Desktop\331BD1-Readme.txt
    Filesize

    1KB

    MD5

    76d3f2d7cc09b7e05b1b21b600a423e2

    SHA1

    7196d095c88ebd5e9bd51b5c0a2b31708904d066

    SHA256

    025e19fb991ced1824946223006e626ef21720ded46cc71546a9f2b3ddf3d19b

    SHA512

    a7f175745c97e1d490c0240612e3bcb4780d2f2de69cd840b8c17291897455d86ec66f6a9b20456a83287c044da1c3715491b76541109cb3e736fd593dd843d0

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  • memory/2036-54-0x0000000075721000-0x0000000075723000-memory.dmp

    Filesize

    8KB

    Download

  • memory/2036-56-0x0000000024950000-0x00000000249CD000-memory.dmp

    Filesize

    500KB

    Download