Overview

overview

10

Static

static

10

58e923ff15...le.exe

windows7_x64

10

58e923ff15...le.exe

windows10_x64

10

Analysis

  • max time kernel
    110s
  • max time network
    16s
  • platform
    windows7_x64
  • resource
    win7v20210410
  • submitted
    26-07-2021 12:59

Sharing

Copy URL
Twitter E-mail
Report Analysis Logs

General

  • Target

    58e923ff158fb5aecd293b7a0e0d305296110b83c6e270786edcc4fea1c8404c.sample.exe

  • Size

    94KB

  • MD5

    73de5babf166f28dc81d6c2faa369379

  • SHA1

    e393a9ecf0d0a8babaa5efcc34f10577aff1cad1

  • SHA256

    58e923ff158fb5aecd293b7a0e0d305296110b83c6e270786edcc4fea1c8404c

  • SHA512

    d1a473ce9af849820b8cc9d777478e2a69293f3471ee3120f9ca96c43af922e0d661048d2d36688a62a63aa185728f83ee32f5a67ddcc0d1633c5bfe46c5ea51

Score
10/10
netwalkerpersistenceransomware

Malware Config

Extracted

Path

C:\1DC4F-Readme.txt

Family

netwalker

Ransom Note
Hi! Your files are encrypted. All encrypted files for this computer has extension: .1dc4f -- 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_1dc4f: HTWHacBfUFzIvE53/Z3sAmtB9s6aBUQJfhsx3ZdDfYLaHrywiI IU9raBo0yDe0OrFDQFobDE0kV/KgwpQ37acwqTNqoobDIG+xVf NAjd1XPuft9PlBv+LsViUthl0JEh9C5bGX1CXsCLe9eSKBd4tK hwgVqNgUWKAEK7mWZFBKg58p7DpsLpI9QvGr9MVxnTs48I5mIF oeGRgr2BlxEIXcbSeSJGInpwkrpn5hjH0IHghnfs4fpB2MkMqO puinMkueNR1JWQBluaQFVm6IGPrkLxOss=}

Extracted

Path

C:\Program Files (x86)\Microsoft Office\Office14\1033\PUBFTSCM\1DC4F-Readme.txt

Family

netwalker

Ransom Note
Hi! Your files are encrypted. All encrypted files for this computer has extension: .1dc4f -- 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_1dc4f: HTWHacBfUFzIvE53/Z3sAmtB9s6aBUQJfhsx3ZdDfYLaHrywiI IU9raBo0yDe0OrFDQFobDE0kV/KgwpQ37acwqTNqoobDIG+xVf NAjd1XPuft9PlBv+LsViUthl0JEh9C5bGX1CXsCLe9eSKBd4tK hwgVqNgUWKAEK7mWZFBKg58p7DpsLpI9QvGr9MVxnTs48I5mIF oeGRgr2BlxEIXcbSeSJGInpwkrpn5hjH0IHghnfs4fpB2MkMqO puinMkueNR1JWQBluaQFVm6IGPrkLxOss=}Hi! Your files are encrypted. All encrypted files for this computer has extension: .1dc4f -- 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_1dc4f: HTWHacBfUFzIvE53/Z3sAmtB9s6aBUQJfhsx3ZdDfYLaHrywiI IU9raBo0yDe0OrFDQFobDE0kV/KgwpQ37acwqTNqoobDIG+xVf NAjd1XPuft9PlBv+LsViUthl0JEh9C5bGX1CXsCLe9eSKBd4tK hwgVqNgUWKAEK7mWZFBKg58p7DpsLpI9QvGr9MVxnTs48I5mIF oeGRgr2BlxEIXcbSeSJGInpwkrpn5hjH0IHghnfs4fpB2MkMqO puinMkueNR1JWQBluaQFVm6IGPrkLxOss=}Hi! Your files are encrypted. All encrypted files for this computer has extension: .1dc4f -- 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_1dc4f: HTWHacBfUFzIvE53/Z3sAmtB9s6aBUQJfhsx3ZdDfYLaHrywiI IU9raBo0yDe0OrFDQFobDE0kV/KgwpQ37acwqTNqoobDIG+xVf NAjd1XPuft9PlBv+LsViUthl0JEh9C5bGX1CXsCLe9eSKBd4tK hwgVqNgUWKAEK7mWZFBKg58p7DpsLpI9QvGr9MVxnTs48I5mIF oeGRgr2BlxEIXcbSeSJGInpwkrpn5hjH0IHghnfs4fpB2MkMqO puinMkueNR1JWQBluaQFVm6IGPrkLxOss=}

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
  • Modifies extensions of user files 3 IoCs

    Ransomware generally changes the extension on encrypted files.

    ransomware
  • Deletes itself 1 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
    persistence
  • Suspicious use of SetThreadContext 2 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 WriteProcessMemory 20 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\58e923ff158fb5aecd293b7a0e0d305296110b83c6e270786edcc4fea1c8404c.sample.exe
    "C:\Users\Admin\AppData\Local\Temp\58e923ff158fb5aecd293b7a0e0d305296110b83c6e270786edcc4fea1c8404c.sample.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious behavior: MapViewOfSection
    • Suspicious use of WriteProcessMemory
    PID:308
    • C:\Windows\SysWOW64\explorer.exe
      "C:\Windows\system32\explorer.exe"
      2⤵
      • Modifies extensions of user files
      • Deletes itself
      • Adds Run key to start application
      • Suspicious use of SetThreadContext
      • Drops file in Program Files directory
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: MapViewOfSection
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:1192
      • C:\Windows\SysWOW64\explorer.exe
        "C:\Windows\system32\explorer.exe"
        3⤵
        • 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
          4⤵
          • Interacts with shadow copies
          PID:1976
      • C:\Windows\SysWOW64\notepad.exe
        C:\Windows\system32\notepad.exe "C:\Users\Admin\Desktop\1DC4F-Readme.txt"
        3⤵
          PID:212
        • C:\Windows\system32\vssadmin.exe
          C:\Windows\system32\vssadmin.exe delete shadows /all /quiet
          3⤵
          • Interacts with shadow copies
          PID:1216
    • C:\Windows\system32\vssvc.exe
      C:\Windows\system32\vssvc.exe
      1⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:1756

    Network

    MITRE ATT&CK Enterprise v6

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • memory/308-60-0x0000000075A31000-0x0000000075A33000-memory.dmp

      Filesize

      8KB

      Download

    • memory/1192-63-0x0000000075411000-0x0000000075413000-memory.dmp

      Filesize

      8KB

      Download

    • memory/1192-67-0x0000000000080000-0x000000000009B000-memory.dmp

      Filesize

      108KB

      Download

    • memory/2036-68-0x00000000000C0000-0x00000000000DB000-memory.dmp

      Filesize

      108KB

      Download