Resubmissions

04/09/2024, 01:43

240904-b479vasfnk

04/09/2024, 01:41

240904-b346sstfqc10

04/09/2024, 01:28

240904-bvr69ssdjl10

General

  • Target
    7ea99740a913fd01ab5b6d630a65f501.bin
  • Size 27.6MB
  • Sample240904-b346sstfqc
  • SHA256 cf15cbbd2d202606139eff015c2be74c70eb0606aeb89469a07382481188c86c
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Family
  • gurcu

C2
  • https://api.telegram.org/bot7258239318:AAE_J6DhWLSRk9YOV8l1ienRdy5HsJZuR6I/sendDocument?chat_id=-1002245526003&caption=%F0%9F%93%82%20-%20Browser%20data%0A%E2%94%9C%E2%94%80%E2%94%80%20%F0%9F%93%82%20-%20cookies(0%20kb

  • https://api.telegram.org/bot7258239318:AAE_J6DhWLSRk9YOV8l1ienRdy5HsJZuR6I/sendMessage?chat_id=-1002245526003

  • https://api.telegram.org/bot7258239318:AAE_J6DhWLSRk9YOV8l1ienRdy5HsJZuR6I/getUpdates?offset=-

  • https://api.telegram.org/bot7258239318:AAE_J6DhWLSRk9YOV8l1ienRdy5HsJZuR6I/sendDocument?chat_id=-1002245526003&caption=%F0%9F%93%B8Screenshot%20take

Targets

    • Target
      7ea99740a913fd01ab5b6d630a65f501.bin
    • Size 27.6MB
    • SHA256 cf15cbbd2d202606139eff015c2be74c70eb0606aeb89469a07382481188c86c
    • MD5 SHA1 SHA512 SSDEEP
    Score
    1/10
    • Target
      06d1a9fd3099cfb0cc829db930ab25f75a532e5e670e1704844cf7b1000d6314.exe
    • Size 27.8MB
    • SHA256 06d1a9fd3099cfb0cc829db930ab25f75a532e5e670e1704844cf7b1000d6314
    • MD5 SHA1 SHA512 SSDEEP
    • Gurcu, WhiteSnake

      Gurcu is a malware stealer written in C#.

    • MilleniumRat

      MilleniumRat is a remote access trojan written in C#.

    • Modifies WinLogon for persistence

    • Process spawned unexpected child process

      This typically indicates the parent process was compromised via an exploit or macro.

    • Suspicious use of NtCreateUserProcessOtherParentProcess

    • Credentials from Password Stores: Credentials from Web Browsers

      Malicious Access or copy of Web Browser Credential store.

    • Command and Scripting Interpreter: PowerShell

      Using powershell.exe command.

    • Stops running service(s)

    • Checks BIOS information in registry

      BIOS information is often read in order to detect sandboxing environments.

    • Clipboard Data

      Adversaries may collect data stored in the clipboard from users copying information within or between applications.

    • Executes dropped EXE

    • Indicator Removal: Clear Windows Event Logs

      Clear Windows Event Logs to hide the activity of an intrusion.

    • Loads dropped DLL

    • Reads user/profile data of web browsers

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

    • UPX packed file

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

    • Unsecured Credentials: Credentials In Files

      Steal credentials from unsecured files.

    • Accesses cryptocurrency files/wallets, possible credential harvesting

    • Adds Run key to start application

    • Legitimate hosting services abused for malware hosting/C2

    • Looks up external IP address via web service

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

    • Obfuscated Files or Information: Command Obfuscation

      Adversaries may obfuscate content during command execution to impede detection.

    • Drops file in System32 directory

    • Enumerates processes with tasklist

    • Suspicious use of SetThreadContext

MITRE ATT&CK Enterprise v15

Tasks