Overview

overview

10

Static

static

10

488261e1e0...le.exe

windows7_x64

10

488261e1e0...le.exe

windows10_x64

10

Analysis

  • max time kernel
    155s
  • max time network
    164s
  • platform
    windows7_x64
  • resource
    win7v20210408
  • submitted
    26-07-2021 12:41

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General

  • Target

    488261e1e0793e6830f68c572db7e229af1d9403bbc8e61b9da707b1b63a137d.sample.exe

  • Size

    69KB

  • MD5

    3229e2489dde524195cf0ccbbf5f7d40

  • SHA1

    a257fc0b117fb9e0a6df128213e11de5cee21129

  • SHA256

    488261e1e0793e6830f68c572db7e229af1d9403bbc8e61b9da707b1b63a137d

  • SHA512

    d719fcf974a9304154daf95f0c80805b9a720a1db1289aa4fd189494cb0c29820a1b999d26fb38378d3a47602b26ff8375189ed9586a9c94c19fae0f4e0c650e

Score
10/10
netwalkerransomwarespywarestealer

Malware Config

Extracted

Path

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

Family

netwalker

Ransom Note
Hi! Your files are encrypted by Netwalker. All encrypted files for this computer has extension: .fdeccd -- 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_fdeccd: kWEhCwmrotNFTn9qpTFooFqpVoRGoyIC6ivvAT2DzsWPVQ4WjG rSMcUYd9JVWhQzTKIUb/H7/xgE2IQr2Tj9qjEz/lf2LD8kgw2l dBgOwU+CbbyiAOjvlUKu+LsE2gTjgR1PAROVbD8zDDX853b3Q/ UMU3eiVXPU+69GIHGxlnlD+6TIY3lu1EF3gVICLFLWWY1MhXOB VFwcrzknKSW1FHHtoXGeSPmQoC7TYS+ewyMlfveQxewJrpQicJ CWkQ57JbRLWfXpQFjD0FzuFQaYhZcfpbzeVCRJhQ==}
URLs

http://pb36hu4spl6cyjdfhing7h3pw6dhpk32ifemawkujj4gp33ejzdq3did.onion

http://rnfdsgm6wb6j6su5txkekw4u4y47kp2eatvu7d6xhyn5cs4lt4pdrqqd.onion

Extracted

Path

C:\Program Files\Google\Chrome\Application\89.0.4389.114\FDECCD-Readme.txt

Family

netwalker

Ransom Note
Hi! Your files are encrypted by Netwalker. All encrypted files for this computer has extension: .fdeccd -- 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_fdeccd: kWEhCwmrotNFTn9qpTFooFqpVoRGoyIC6ivvAT2DzsWPVQ4WjG rSMcUYd9JVWhQzTKIUb/H7/xgE2IQr2Tj9qjEz/lf2LD8kgw2l dBgOwU+CbbyiAOjvlUKu+LsE2gTjgR1PAROVbD8zDDX853b3Q/ UMU3eiVXPU+69GIHGxlnlD+6TIY3lu1EF3gVICLFLWWY1MhXOB VFwcrzknKSW1FHHtoXGeSPmQoC7TYS+ewyMlfveQxewJrpQicJ CWkQ57JbRLWfXpQFjD0FzuFQaYhZcfpbzeVCRJhQ==}Hi! Your files are encrypted by Netwalker. All encrypted files for this computer has extension: .fdeccd -- 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_fdeccd: kWEhCwmrotNFTn9qpTFooFqpVoRGoyIC6ivvAT2DzsWPVQ4WjG rSMcUYd9JVWhQzTKIUb/H7/xgE2IQr2Tj9qjEz/lf2LD8kgw2l dBgOwU+CbbyiAOjvlUKu+LsE2gTjgR1PAROVbD8zDDX853b3Q/ UMU3eiVXPU+69GIHGxlnlD+6TIY3lu1EF3gVICLFLWWY1MhXOB VFwcrzknKSW1FHHtoXGeSPmQoC7TYS+ewyMlfveQxewJrpQicJ CWkQ57JbRLWfXpQFjD0FzuFQaYhZcfpbzeVCRJhQ==}
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 13 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 WriteProcessMemory 16 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\488261e1e0793e6830f68c572db7e229af1d9403bbc8e61b9da707b1b63a137d.sample.exe
    "C:\Users\Admin\AppData\Local\Temp\488261e1e0793e6830f68c572db7e229af1d9403bbc8e61b9da707b1b63a137d.sample.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:1656
    • C:\Windows\system32\vssadmin.exe
      C:\Windows\system32\vssadmin.exe delete shadows /all /quiet
      2⤵
      • Interacts with shadow copies
      PID:1100
    • C:\Windows\SysWOW64\notepad.exe
      C:\Windows\system32\notepad.exe "C:\Users\Admin\Desktop\FDECCD-Readme.txt"
      2⤵
        PID:5396
      • C:\Windows\SysWOW64\cmd.exe
        cmd /c "C:\Users\Admin\AppData\Local\Temp\DF28.tmp.bat"
        2⤵
        • Deletes itself
        • Suspicious use of WriteProcessMemory
        PID:6936
        • C:\Windows\SysWOW64\taskkill.exe
          taskkill /F /PID 1656
          3⤵
          • Kills process with taskkill
          • Suspicious use of AdjustPrivilegeToken
          PID:4924
    • C:\Windows\system32\vssvc.exe
      C:\Windows\system32\vssvc.exe
      1⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:2644

    Network

    MITRE ATT&CK Matrix ATT&CK v6

    Initial Access

    Execution

    Persistence

    Privilege Escalation

    Defense Evasion

    File Deletion

    2
    T1107

    Credential Access

    Credentials in Files

    1
    T1081

    Discovery

    Lateral Movement

    Collection

    Data from Local System

    1
    T1005

    Exfiltration

    Command and Control

    Impact

    Inhibit System Recovery

    2
    T1490

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\Local\Temp\DF28.tmp.bat
      MD5

      c5326522db8a0cfe430eb93bf3d841b4

      SHA1

      9865c40321156f4106b546515297c0f2295e0dc8

      SHA256

      640302305c180f7ac4f8afa37f1f4a68adb11395db4d1fab2daf4b8c9702ee5b

      SHA512

      f88c3c6c0d6d12c12055c5377437d21a08dedbdc784eb5ef7ffcaf5928e9c20a7d3e6f7efa662a20b73270831b6d687d208d8dccc96eff9f84226ee5e6a0c7fa

      Download Submit
    • C:\Users\Admin\Desktop\FDECCD-Readme.txt
      MD5

      5d65511883d204197a5738287d8ddc06

      SHA1

      bbfeb2626323f0d9202a69274d1966746bf9ca77

      SHA256

      c2c07aaa05c228e5756b30eefbb8d3aa4027ab4b683c4fdfdcfa438b11dd3218

      SHA512

      69f26e17af89124189382c2486d7062176b5840d81d86cfeda03e296ee692d104b4cf3d618d2e846c606059db56640a8e8f5e3bba022086ab713d695584e8377

      Download Submit
    • memory/1100-61-0x0000000000000000-mapping.dmp
      Download
    • memory/1656-60-0x0000000075201000-0x0000000075203000-memory.dmp
      Filesize

      8KB

      Download
    • memory/4924-67-0x0000000000000000-mapping.dmp
      Download
    • memory/5396-62-0x0000000000000000-mapping.dmp
      Download
    • memory/6936-64-0x0000000000000000-mapping.dmp
      Download