Overview

overview

10

Static

static

10

de04d24021...9d.exe

windows7_x64

10

de04d24021...9d.exe

windows11_x64

10

de04d24021...9d.exe

windows10_x64

10

Analysis

  • max time kernel
    405s
  • max time network
    1569s
  • platform
    windows11_x64
  • resource
    win11
  • submitted
    27-10-2021 09:06

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General

  • Target

    de04d2402154f676f757cf1380671f396f3fc9f7dbb683d9461edd2718c4e09d.exe

Score
10/10
netwalkerpersistenceransomware

Malware Config

Extracted

Path

C:\DFA4F-Readme.txt

Family

netwalker

Ransom Note
Hi! Your files are encrypted. All encrypted files for this computer has extension: .dfa4f -- 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_dfa4f: kLYhH60gP9Qkmun+itwgwdY06DhX1ULsoU6D4RQVzkQ+gyNXxT Y9JXESd8zBe4AYHTHkcQPlJq1w9RiT+liLolGsstIBGl4FWage GxP9W1LQ4GYygFV9fxiO/3ub2f5/SsbrXTyzuOm/JsusEk35nQ K/aEo2m8jZ8VHK0bUsNYHB3SQtdeYZLMIlMco3PFsEZIry/gz4 Fa4kRsnGd9QFNZZ4X49DqhsQoQcaRUDXsMdwk+LcafsXilvnAj Pn4pU8nWCgTQSgy3h+FGTFnxv1bVPM7TQ=}
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
  • 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 WriteProcessMemory 13 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:4840
    • C:\Windows\SysWOW64\explorer.exe
      "C:\Windows\system32\explorer.exe"
      2⤵
      • 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:3980
      • C:\Windows\SysWOW64\explorer.exe
        "C:\Windows\system32\explorer.exe"
        3⤵
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:1480
        • C:\Windows\system32\vssadmin.exe
          C:\Windows\system32\vssadmin.exe delete shadows /all /quiet
          4⤵
          • Interacts with shadow copies
          PID:1708
      • C:\Windows\SysWOW64\notepad.exe
        C:\Windows\system32\notepad.exe "C:\Users\Admin\Desktop\DFA4F-Readme.txt"
        3⤵
          PID:5700
        • C:\Windows\system32\vssadmin.exe
          C:\Windows\system32\vssadmin.exe delete shadows /all /quiet
          3⤵
          • Interacts with shadow copies
          PID:5772
    • C:\Windows\system32\vssvc.exe
      C:\Windows\system32\vssvc.exe
      1⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:2112

    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\DFA4F-Readme.txt
      MD5

      b409916f8d5734441e0ed5c6512c1e83

      SHA1

      c0f6faf999478473b9e0a15f44c9e51b47985615

      SHA256

      47cee4da008f3d7cfb48639b13d18fc4876665435ea1499bb8a1d9acb05a4a61

      SHA512

      808eff830abd8bd8aae045a13f9edff556b744097c767eb4aaec3dd727620ab99467a449efcdaa0faf3106e6b504230c239220d8209ff3cafa88d8c57aba7a8c

      Download Submit
    • memory/1480-148-0x0000000000000000-mapping.dmp
      Download
    • memory/1480-150-0x0000000000A50000-0x0000000000A6B000-memory.dmp
      Filesize

      108KB

      Download
    • memory/1708-149-0x0000000000000000-mapping.dmp
      Download
    • memory/3980-146-0x0000000000000000-mapping.dmp
      Download
    • memory/3980-147-0x0000000003230000-0x000000000324B000-memory.dmp
      Filesize

      108KB

      Download
    • memory/5700-151-0x0000000000000000-mapping.dmp
      Download
    • memory/5772-152-0x0000000000000000-mapping.dmp
      Download