Overview

overview

10

Static

static

10

de04d24021...9d.exe

windows7_x64

10

de04d24021...9d.exe

windows10_x64

10

Analysis

  • max time kernel
    113s
  • max time network
    140s
  • platform
    windows7_x64
  • resource
    win7v20210410
  • submitted
    31-08-2021 11:41

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General

  • Target

    de04d2402154f676f757cf1380671f396f3fc9f7dbb683d9461edd2718c4e09d.exe

  • Size

    94KB

  • MD5

    993b73d6490bc5a7e23e02210b317247

  • SHA1

    6fd314af34409e945504e166eb8cd88127c1070e

  • SHA256

    de04d2402154f676f757cf1380671f396f3fc9f7dbb683d9461edd2718c4e09d

  • SHA512

    417f55a066896695ce1b8d998767f706005d3d6f1792f2b86261a235034a6c3bb1deae6920857fbc710d22b833479b2cbeafd92735381f1cc357adcc8a74c55d

Score
10/10
netwalkerpersistenceransomware

Malware Config

Extracted

Path

C:\Program Files\Microsoft Office\Office14\64EEB-Readme.txt

Family

netwalker

Ransom Note
Hi! Your files are encrypted. All encrypted files for this computer has extension: .64eeb -- 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: 1.knoocknoo@cock.li 2.eeeooppaaaxxx@tuta.io Don't forget to include your code in the email: {code_1b1ea859_64eeb: oMH56M9avCLh6grRFhL604rTmpos46suiylBLhoiKV2Zr4n0bm pQSddEA3Qk7M6IbH7jby3PsTlFqRmQGgBeFSXwnm3WX38eWage G8QcMcndUm30ttR5mTCr2EcsHV5HeRiFVqdH4gEkJw2SfZwJHv rKQVU5UE6UacmwJvc7gmpLQSsp7aG13puYGCJfO9W5ICPwtYrb szQgQEHNmN7BxtRaruat8g/po8uOdyl7YFxCOWmdSMkUhvjQGE m28BcEq9dhR7NKeVIVxHkt4ylvXVVr6KI=}
Emails

knoocknoo@cock.li

eeeooppaaaxxx@tuta.io

Extracted

Path

C:\Program Files\7-Zip\Lang\64EEB-Readme.txt

Family

netwalker

Ransom Note
Hi! Your files are encrypted. All encrypted files for this computer has extension: .64eeb -- 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: 1.knoocknoo@cock.li 2.eeeooppaaaxxx@tuta.io Don't forget to include your code in the email: {code_1b1ea859_64eeb: oMH56M9avCLh6grRFhL604rTmpos46suiylBLhoiKV2Zr4n0bm pQSddEA3Qk7M6IbH7jby3PsTlFqRmQGgBeFSXwnm3WX38eWage G8QcMcndUm30ttR5mTCr2EcsHV5HeRiFVqdH4gEkJw2SfZwJHv rKQVU5UE6UacmwJvc7gmpLQSsp7aG13puYGCJfO9W5ICPwtYrb szQgQEHNmN7BxtRaruat8g/po8uOdyl7YFxCOWmdSMkUhvjQGE m28BcEq9dhR7NKeVIVxHkt4ylvXVVr6KI=}Hi! Your files are encrypted. All encrypted files for this computer has extension: .64eeb -- 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: 1.knoocknoo@cock.li 2.eeeooppaaaxxx@tuta.io Don't forget to include your code in the email: {code_1b1ea859_64eeb: oMH56M9avCLh6grRFhL604rTmpos46suiylBLhoiKV2Zr4n0bm pQSddEA3Qk7M6IbH7jby3PsTlFqRmQGgBeFSXwnm3WX38eWage G8QcMcndUm30ttR5mTCr2EcsHV5HeRiFVqdH4gEkJw2SfZwJHv rKQVU5UE6UacmwJvc7gmpLQSsp7aG13puYGCJfO9W5ICPwtYrb szQgQEHNmN7BxtRaruat8g/po8uOdyl7YFxCOWmdSMkUhvjQGE m28BcEq9dhR7NKeVIVxHkt4ylvXVVr6KI=}
Emails

knoocknoo@cock.li

eeeooppaaaxxx@tuta.io

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
  • 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\de04d2402154f676f757cf1380671f396f3fc9f7dbb683d9461edd2718c4e09d.exe
    "C:\Users\Admin\AppData\Local\Temp\de04d2402154f676f757cf1380671f396f3fc9f7dbb683d9461edd2718c4e09d.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious behavior: MapViewOfSection
    • Suspicious use of WriteProcessMemory
    PID:1652
    • 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:2024
      • C:\Windows\SysWOW64\explorer.exe
        "C:\Windows\system32\explorer.exe"
        3⤵
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:2044
        • C:\Windows\system32\vssadmin.exe
          C:\Windows\system32\vssadmin.exe delete shadows /all /quiet
          4⤵
          • Interacts with shadow copies
          PID:1172
      • C:\Windows\SysWOW64\notepad.exe
        C:\Windows\system32\notepad.exe "C:\Users\Admin\Desktop\64EEB-Readme.txt"
        3⤵
          PID:5304
        • C:\Windows\system32\vssadmin.exe
          C:\Windows\system32\vssadmin.exe delete shadows /all /quiet
          3⤵
          • Interacts with shadow copies
          PID:5348
    • C:\Windows\system32\vssvc.exe
      C:\Windows\system32\vssvc.exe
      1⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:268

    Network

    MITRE ATT&CK Matrix ATT&CK v6

    Initial Access

    Execution

    Persistence

    Registry Run Keys / Startup Folder

    1
    T1060

    Privilege Escalation

    Defense Evasion

    File Deletion

    2
    T1107

    Modify Registry

    1
    T1112

    Credential Access

    Discovery

    Lateral Movement

    Collection

    Exfiltration

    Command and Control

    Impact

    Inhibit System Recovery

    2
    T1490

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\Desktop\64EEB-Readme.txt
      MD5

      706a12b01469bbab745b7f448708118b

      SHA1

      ba5c5b0625424eb5d8b98fe7a016d1292a6e2ab0

      SHA256

      17d0a81b10a6954dae6532efa5588d5065033ba1ad59b5c2170a0816da7b438d

      SHA512

      ab0c752ea1b9d78b069b1ec12f11db1b69f52ad410267411f2f30de9f26199619489176dfbf02969346f08b9b7ea4d82b54c40121849ba2ef2003388b80481fc

      Download Submit
    • memory/1172-67-0x0000000000000000-mapping.dmp
      Download
    • memory/1652-60-0x0000000076E11000-0x0000000076E13000-memory.dmp
      Filesize

      8KB

      Download
    • memory/2024-61-0x0000000000000000-mapping.dmp
      Download
    • memory/2024-63-0x0000000075451000-0x0000000075453000-memory.dmp
      Filesize

      8KB

      Download
    • memory/2024-68-0x0000000000080000-0x000000000009B000-memory.dmp
      Filesize

      108KB

      Download
    • memory/2044-64-0x0000000000000000-mapping.dmp
      Download
    • memory/2044-69-0x0000000000080000-0x000000000009B000-memory.dmp
      Filesize

      108KB

      Download
    • memory/5304-70-0x0000000000000000-mapping.dmp
      Download
    • memory/5348-73-0x0000000000000000-mapping.dmp
      Download