General

  • Target
    4363463463464363463463463.exe.zip
  • Size 4KB
  • Sample260423-ycc1ysft5j
  • SHA256 123da42c027f117af7a0dddab556cd93a1b3a3eb833c5124daf4b9042ab552c2
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Extracted

Path
  • C:\Users\Admin\AppData\Local\Temp\Files\!Please Read Me!.txt

  • wannacry

Ransom Note
  • Q: What's wrong with my files? A: Ooops, your important files are encrypted. It means you will not be able to access them anymore until they are decrypted. If you follow our instructions we guarantee that you can decrypt all your files quickly and safely! Let's start decrypting! Q: What do I do? A: First, you need to pay service fees for the decryption. Please send $300 worth of bitcoin to this bitcoin address: 15zGqZCTcys6eCjDkE3DypCjXi6QWRV6V1 Next, please find the decrypt software on your desktop, an executable file named "!WannaDecryptor!.exe". If it does not exsit, download the software from the address below. (You may need to disable your antivirus for a while.) rar password: wcry123 Run and follow the instructions! �
Wallets
  • 15zGqZCTcys6eCjDkE3DypCjXi6QWRV6V1

Extracted

Family
  • asyncrat

Botnet
  • Beyond

Attributes
  • c2_url_file

    https://rentry.co/Spread4Filly/raw

  • delay

    2

  • install

    true

  • install_file

    $77svchost.exe

  • install_folder

    %AppData%

aes.plain

Extracted

Family
  • xworm

C2
  • 193.222.96.30:4040

Attributes
  • Install_directory

    %LocalAppData%

  • install_file

    USB.exe

  • telegram

    https://api.telegram.org/bot6703930852:AAHkGtAzjTv18cTE6yjZ0UbhefLu4Fjl9Gc

Extracted

Family
  • discordrat

Attributes
  • discord_token

    MTE1ODQ5NzkyODQ2MjIwNTExOQ.GRJ0l6.7SpFGKSu5G_J8dWAJje9hfCtSecIS6RuVXIE_E

  • server_id

    1153564868197236846

Extracted

Family
  • vidar

Botnet
  • dadf4dfb4414faa707e84357dfba40dd

C2
  • https://steamcommunity.com/profiles/76561198761022496

Attributes
  • user_agent

    Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:140.0) Gecko/20100101 Firefox/140.0

Extracted

Family
  • xworm

Version
  • XWorm V5.6

C2
  • 147.185.221.27:31149

Attributes
  • Install_directory

    %AppData%

  • install_file

    XClient.exe

Extracted

Family
  • quasar

Version
  • 1.4.1

Botnet
  • DDNS

C2
  • 193.161.193.99:32471

Mutex
  • 807f3187-d087-4fff-beff-e73293a32af8

Attributes
  • encryption_key

    81A0C14D4C705B3C678E573C849DE7F6A3671A8B

  • install_name

    jusched.exe

  • key_salt

    bfeb1e56fbcd973bb219022430a57843003d5644d21e62b9d4f180e7e6c33941

  • log_directory

    CachedLogs

  • reconnect_delay

    3000

  • startup_key

    Java Update Scheduler

  • subdirectory

    Java

Targets

    • Target
      4363463463464363463463463.exe.bin
    • Size 10KB
    • SHA256 2fcad226b17131da4274e1b9f8f31359bdd325c9568665f08fd1f6c5d06a23ce
    • MD5 SHA1 SHA512 SSDEEP TLSH
    • AmmyyAdmin payload

    • Async RAT payload

    • Detect Xworm Payload

    • Detects DonutLoader

    • Detects RustMe Keylogger

    • Detects Vidar Stealer

    • Family: Ammyy Admin

      Remote admin tool with various capabilities.

    • Family: AsyncRat

      AsyncRAT is designed to remotely monitor and control other computers written in C#.

    • Family: Discord RAT

      A RAT written in C# using Discord as a C2.

    • Family: DonutLoader

      DonutLoader is a position-independent code that enables in-memory execution of VBScript, JScript, EXE, DLL files and dotNET assemblies.

    • Family: FlawedAmmyy RAT

      Remote-access trojan based on leaked code for the Ammyy remote admin software.

    • Family: Mimikatz

      mimikatz is an open source tool to dump credentials on Windows.

    • Family: Quasar RAT

      Quasar is an open source Remote Access Tool.

    • Family: RedLine

      RedLine Stealer is a malware family written in C#, first appearing in early 2020.

    • Family: RustMe Keylogger

      RustMe is a keylogger written in C++.

    • Family: Troldesh, Shade, Encoder.858

      Troldesh is a ransomware spread by malspam.

    • Family: Vidar

      Vidar is an infostealer based on Arkei stealer.

    • Family: Wannacry

      WannaCry is a ransomware cryptoworm.

    • Family: Xworm

      Xworm is a remote access trojan written in C#.

    • Family: xmrig

      XMRig is a high performance, open source, cross platform CPU/GPU miner.

    • Quasar payload

    • RedLine payload

    • Suspicious use of NtCreateUserProcessOtherParentProcess

    • mimikatz is an open source tool to dump credentials on Windows

    • Deletes shadow copies

      Ransomware often targets backup files to inhibit system recovery.

    • XMRig Miner payload

    • Command and Scripting Interpreter: PowerShell

      Run Powershell and hide display window.

    • Downloads MZ/PE file

    • Drops file in Drivers directory

    • Modifies Windows Firewall

    • Checks computer location settings

      Looks up country code configured in the registry, likely geofence.

    • Creates new service(s)

    • Drops startup file

    • Executes dropped EXE

    • Loads dropped DLL

    • Modifies file permissions

    • Reads user/profile data of web browsers

      Infostealers often target stored browser data, which can include saved credentials etc.

    • Stops running service(s)

    • Suricata alert: Tor Node X.509 Certificate Pattern Detected - Inbound

      Network activity triggered a Suricata alert

    • Themida packer

      Detects Themida, an advanced Windows software protection system.

    • Adds Run key to start application

    • Checks installed software on the system

      Looks up Uninstall key entries in the registry to enumerate software on the system.

    • Contacts third-party web service commonly abused for C2

      Legitimate web (hosting) services can be abused by malware authors to host malware or C2s.

    • Enumerates connected drives

      Attempts to read the root path of hard drives other than the default C: drive.

    • Looks up external IP address via web service

      Uses a legitimate IP lookup service to find the infected system's external IP.

    • ConfuserEx .NET packer

      Detects ConfuserEx .NET packer.

    • Drops autorun.inf file

      Malware can abuse Windows Autorun to spread further via attached volumes.

    • Drops file in System32 directory

    • Enumerates processes with tasklist

    • SmartAssembly .NET packer

      Detects SmartAssembly .NET packer.

    • Suspicious use of SetThreadContext

    • UPX packed file

      Detects executables packed with UPX/modified UPX open source packer.

MITRE ATT&CK Enterprise v16

Tasks