Overview

overview

10

Static

static

10

ฺฺฺK...ฺฺ

windows10_x64

10

ฺฺฺ�...ฺฺ

windows10_x64

10

ฺฺฺ�...ฺฺ

windows10_x64

10

Analysis

  • max time kernel
    36s
  • max time network
    49s
  • platform
    windows10_x64
  • resource
    win10v20201028
  • submitted
    03-12-2020 18:27

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General

  • Target

    ef3ff3f0.bin.exe

  • Size

    94KB

  • MD5

    993b73d6490bc5a7e23e02210b317247

  • SHA1

    6fd314af34409e945504e166eb8cd88127c1070e

  • SHA256

    de04d2402154f676f757cf1380671f396f3fc9f7dbb683d9461edd2718c4e09d

  • SHA512

    417f55a066896695ce1b8d998767f706005d3d6f1792f2b86261a235034a6c3bb1deae6920857fbc710d22b833479b2cbeafd92735381f1cc357adcc8a74c55d

Score
10/10
netwalkerpersistenceransomwarespyware

Malware Config

Extracted

Path

C:\6C16D-Readme.txt

Family

netwalker

Ransom Note
Hi! Your files are encrypted. All encrypted files for this computer has extension: .6c16d -- 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. Сontact us: [email protected] [email protected] Don't forget to include your code in the email: {code_1b1ea859_6c16d: WZFHCIgX4MAALq3qfdMs5NNyujiA8asVs6/d+9DK7Ofpf1MuLp 4BoY0ZicOxG5RDQwPLhgmp5NaGTPKNX7dmo0LDZRPwZspcWage G8iFPlFd+aguyAQvEWJ81QQGo9UbKzsrSP9HrMwQ9VeZWsWXN4 45xosi3/kP+8zvsmn5lqeM9o3GB4q3KH8yPeQiSWdLIAkj0OxI zFub6c9gawbq71iDluxL9pyWSefMWZfsUvQHxGMB4yM4bfgr4g 83bLlfEWW8cECUwenZ1KxNTQ4ajJqBZAI=}

Extracted

Path

C:\ProgramData\Microsoft\Network\Downloader\6C16D-Readme.txt

Family

netwalker

Ransom Note
Hi! Your files are encrypted. All encrypted files for this computer has extension: .6c16d -- 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. Сontact us: [email protected] [email protected] Don't forget to include your code in the email: {code_1b1ea859_6c16d: WZFHCIgX4MAALq3qfdMs5NNyujiA8asVs6/d+9DK7Ofpf1MuLp 4BoY0ZicOxG5RDQwPLhgmp5NaGTPKNX7dmo0LDZRPwZspcWage G8iFPlFd+aguyAQvEWJ81QQGo9UbKzsrSP9HrMwQ9VeZWsWXN4 45xosi3/kP+8zvsmn5lqeM9o3GB4q3KH8yPeQiSWdLIAkj0OxI zFub6c9gawbq71iDluxL9pyWSefMWZfsUvQHxGMB4yM4bfgr4g 83bLlfEWW8cECUwenZ1KxNTQ4ajJqBZAI=}Hi! Your files are encrypted. All encrypted files for this computer has extension: .6c16d -- 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. Сontact us: [email protected] [email protected] Don't forget to include your code in the email: {code_1b1ea859_6c16d: WZFHCIgX4MAALq3qfdMs5NNyujiA8asVs6/d+9DK7Ofpf1MuLp 4BoY0ZicOxG5RDQwPLhgmp5NaGTPKNX7dmo0LDZRPwZspcWage G8iFPlFd+aguyAQvEWJ81QQGo9UbKzsrSP9HrMwQ9VeZWsWXN4 45xosi3/kP+8zvsmn5lqeM9o3GB4q3KH8yPeQiSWdLIAkj0OxI zFub6c9gawbq71iDluxL9pyWSefMWZfsUvQHxGMB4yM4bfgr4g 83bLlfEWW8cECUwenZ1KxNTQ4ajJqBZAI=}

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 1 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.

    spyware
  • Adds Run key to start application 2 TTPs 1 IoCs
    persistence
  • Suspicious use of SetThreadContext 1 IoCs
  • Drops file in Program Files directory 2842 IoCs
  • Interacts with shadow copies 2 TTPs 1 IoCs

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

    ransomware
  • Suspicious behavior: EnumeratesProcesses 7153 IoCs
  • Suspicious behavior: MapViewOfSection 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 6 IoCs
  • Suspicious use of WriteProcessMemory 8 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\ef3ff3f0.bin.exe
    "C:\Users\Admin\AppData\Local\Temp\ef3ff3f0.bin.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious behavior: MapViewOfSection
    • Suspicious use of WriteProcessMemory
    PID:4760
    • C:\Windows\SysWOW64\explorer.exe
      "C:\Windows\system32\explorer.exe"
      2⤵
      • Modifies extensions of user files
      • 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:4172
      • C:\Windows\SysWOW64\explorer.exe
        "C:\Windows\system32\explorer.exe"
        3⤵
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:3724
        • C:\Windows\system32\vssadmin.exe
          C:\Windows\system32\vssadmin.exe delete shadows /all /quiet
          4⤵
          • Interacts with shadow copies
          PID:4272
  • C:\Windows\system32\vssvc.exe
    C:\Windows\system32\vssvc.exe
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:2480

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • memory/4172-4-0x00000000029D0000-0x00000000029EB000-memory.dmp

    Filesize

    108KB

    Download

  • memory/4760-3-0x00000000005E0000-0x00000000005FB000-memory.dmp

    Filesize

    108KB

    Download