Overview

overview

10

Static

static

10

58e923ff15...le.exe

windows10_x64

10

Analysis

  • max time kernel
    148s
  • max time network
    122s
  • platform
    windows10_x64
  • resource
    win10-en-20210920
  • submitted
    22-10-2021 15:26

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General

  • Target

    58e923ff158fb5aecd293b7a0e0d305296110b83c6e270786edcc4fea1c8404c.bin.sample.exe

  • Size

    94KB

  • MD5

    73de5babf166f28dc81d6c2faa369379

  • SHA1

    e393a9ecf0d0a8babaa5efcc34f10577aff1cad1

  • SHA256

    58e923ff158fb5aecd293b7a0e0d305296110b83c6e270786edcc4fea1c8404c

  • SHA512

    d1a473ce9af849820b8cc9d777478e2a69293f3471ee3120f9ca96c43af922e0d661048d2d36688a62a63aa185728f83ee32f5a67ddcc0d1633c5bfe46c5ea51

Score
10/10
netwalkerpersistenceransomware

Malware Config

Extracted

Path

C:\odt\C84F5-Readme.txt

Family

netwalker

Ransom Note
Hi! Your files are encrypted. All encrypted files for this computer has extension: .c84f5 -- 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 and even god will not be able to help you, it could be files on the network belonging to other users, sure you want to take that responsibility? -- Our encryption algorithms are very strong and your files are very well protected, you can't hope to recover them without our help. 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 decrypt program, you may damage them and then they will be impossible to recover. We advise you to contact us as soon as possible, otherwise there is a possibility that your files will never be returned. For us this is just business and to prove to you our seriousness, we will decrypt you some files for free, but we will not wait for your letter for a long time, mail can be abused, we are moving on, hurry up with the decision. Contact us: [email protected] [email protected] Don't forget to include your code in the email: {code_345f15fb_c84f5: uMsMYFsYIBnrzmf6+u2aDiEAl/AHDxDgG37vIR8PhsZ+/ebYu+ 02wKgFt9+rRb9StiZjApAkMOWi+j+mgi2V3pLAeKmbecN/+xVf NK79JF/NMAkt/Mz18hNxSx40IsVmJtDG5HOJPdBbVkw+zrL18f Mw2WlbMLGkRi6D/meqq+jcgKA7pV6uJSpYwcs+9EbACSrNwg7I 1HyCiTqYm25BODjyEqYuC2DQXW2z8CaqQuoktm9mibnII9qPP5 HnI5N2gYWkpfOjOVj2J9bWa1KUxbfk+ts=}

Extracted

Path

C:\C84F5-Readme.txt

Family

netwalker

Ransom Note
Hi! Your files are encrypted. All encrypted files for this computer has extension: .c84f5 -- 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 and even god will not be able to help you, it could be files on the network belonging to other users, sure you want to take that responsibility? -- Our encryption algorithms are very strong and your files are very well protected, you can't hope to recover them without our help. 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 decrypt program, you may damage them and then they will be impossible to recover. We advise you to contact us as soon as possible, otherwise there is a possibility that your files will never be returned. For us this is just business and to prove to you our seriousness, we will decrypt you some files for free, but we will not wait for your letter for a long time, mail can be abused, we are moving on, hurry up with the decision. Contact us: [email protected] [email protected] Don't forget to include your code in the email: {code_345f15fb_c84f5: uMsMYFsYIBnrzmf6+u2aDiEAl/AHDxDgG37vIR8PhsZ+/ebYu+ 02wKgFt9+rRb9StiZjApAkMOWi+j+mgi2V3pLAeKmbecN/+xVf NK79JF/NMAkt/Mz18hNxSx40IsVmJtDG5HOJPdBbVkw+zrL18f Mw2WlbMLGkRi6D/meqq+jcgKA7pV6uJSpYwcs+9EbACSrNwg7I 1HyCiTqYm25BODjyEqYuC2DQXW2z8CaqQuoktm9mibnII9qPP5 HnI5N2gYWkpfOjOVj2J9bWa1KUxbfk+ts=}Hi! Your files are encrypted. All encrypted files for this computer has extension: .c84f5 -- 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 and even god will not be able to help you, it could be files on the network belonging to other users, sure you want to take that responsibility? -- Our encryption algorithms are very strong and your files are very well protected, you can't hope to recover them without our help. 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 decrypt program, you may damage them and then they will be impossible to recover. We advise you to contact us as soon as possible, otherwise there is a possibility that your files will never be returned. For us this is just business and to prove to you our seriousness, we will decrypt you some files for free, but we will not wait for your letter for a long time, mail can be abused, we are moving on, hurry up with the decision. Contact us: [email protected] [email protected] Don't forget to include your code in the email: {code_345f15fb_c84f5: uMsMYFsYIBnrzmf6+u2aDiEAl/AHDxDgG37vIR8PhsZ+/ebYu+ 02wKgFt9+rRb9StiZjApAkMOWi+j+mgi2V3pLAeKmbecN/+xVf NK79JF/NMAkt/Mz18hNxSx40IsVmJtDG5HOJPdBbVkw+zrL18f Mw2WlbMLGkRi6D/meqq+jcgKA7pV6uJSpYwcs+9EbACSrNwg7I 1HyCiTqYm25BODjyEqYuC2DQXW2z8CaqQuoktm9mibnII9qPP5 HnI5N2gYWkpfOjOVj2J9bWa1KUxbfk+ts=}

Signatures

  • Detected Netwalker Ransomware 2 IoCs

    Detected unpacked Netwalker executable.

  • 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
  • Deletes itself 1 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
    persistence
  • Suspicious use of SetThreadContext 1 IoCs
  • Drops file in Program Files directory 64 IoCs
  • Interacts with shadow copies 2 TTPs 2 IoCs

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

    ransomware
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious behavior: MapViewOfSection 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 6 IoCs
  • Suspicious use of FindShellTrayWindow 1 IoCs
  • Suspicious use of WriteProcessMemory 13 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\58e923ff158fb5aecd293b7a0e0d305296110b83c6e270786edcc4fea1c8404c.bin.sample.exe
    "C:\Users\Admin\AppData\Local\Temp\58e923ff158fb5aecd293b7a0e0d305296110b83c6e270786edcc4fea1c8404c.bin.sample.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious behavior: MapViewOfSection
    • Suspicious use of WriteProcessMemory
    PID:3808
    • C:\Windows\SysWOW64\explorer.exe
      "C:\Windows\system32\explorer.exe"
      2⤵
      • Deletes itself
      • Adds Run key to start application
      • Drops file in Program Files directory
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: MapViewOfSection
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:3336
      • C:\Windows\SysWOW64\explorer.exe
        "C:\Windows\system32\explorer.exe"
        3⤵
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:3960
        • C:\Windows\system32\vssadmin.exe
          C:\Windows\system32\vssadmin.exe delete shadows /all /quiet
          4⤵
          • Interacts with shadow copies
          PID:3584
      • C:\Windows\SysWOW64\notepad.exe
        C:\Windows\system32\notepad.exe "C:\Users\Admin\Desktop\C84F5-Readme.txt"
        3⤵
        • Suspicious use of FindShellTrayWindow
        PID:5700
      • C:\Windows\system32\vssadmin.exe
        C:\Windows\system32\vssadmin.exe delete shadows /all /quiet
        3⤵
        • Interacts with shadow copies
        PID:4028
  • C:\Windows\system32\vssvc.exe
    C:\Windows\system32\vssvc.exe
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:692

Network

MITRE ATT&CK Enterprise v6

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Downloads

  • memory/3336-118-0x0000000003030000-0x000000000304B000-memory.dmp

    Filesize

    108KB

    Download

  • memory/3960-119-0x00000000007A0000-0x00000000007BB000-memory.dmp

    Filesize

    108KB

    Download