General

  • Target

    71540af9f3dd877a91cd506fb2efb0ebb4211c4370c8edb74185a5b9554bb66d.exe

  • Size

    196KB

  • Sample

    240530-bnrxxsab28

  • MD5

    06f89bea6cec0ee3459c26732c6f4d40

  • SHA1

    077c773301223d98b07630487facd24710353335

  • SHA256

    71540af9f3dd877a91cd506fb2efb0ebb4211c4370c8edb74185a5b9554bb66d

  • SHA512

    a172753e363467928c9bf700f36865eb53ab5ea85dcbf7bb3fa8bc756f130eacf3ba194f8b25707203b55e8b84a256f756e27a17cce4f81991e9cc2c31353d6b

  • SSDEEP

    3072:gpFMiA1m+CfRqBpLd0aTUWs+zZl1/eSFZQ0xw5W1LvTFH:gpfqRCfsppZlBvvw5WNRH

Malware Config

Extracted

Family

agenttesla

Credentials

Extracted

Family

xworm

Version

5.0

C2

178.215.236.251:717

Mutex

0AVeWj1eTvHM3Un2

Attributes
  • Install_directory

    %AppData%

  • install_file

    XClient.exe

  • telegram

    https://api.telegram.org/bot5987023205:AAFlvwKv3zD3wQ2CQAewIB6uU95uBQ25ip0/sendMessage?chat_id=5202962680

aes.plain

Targets

    • Target

      71540af9f3dd877a91cd506fb2efb0ebb4211c4370c8edb74185a5b9554bb66d.exe

    • Size

      196KB

    • MD5

      06f89bea6cec0ee3459c26732c6f4d40

    • SHA1

      077c773301223d98b07630487facd24710353335

    • SHA256

      71540af9f3dd877a91cd506fb2efb0ebb4211c4370c8edb74185a5b9554bb66d

    • SHA512

      a172753e363467928c9bf700f36865eb53ab5ea85dcbf7bb3fa8bc756f130eacf3ba194f8b25707203b55e8b84a256f756e27a17cce4f81991e9cc2c31353d6b

    • SSDEEP

      3072:gpFMiA1m+CfRqBpLd0aTUWs+zZl1/eSFZQ0xw5W1LvTFH:gpfqRCfsppZlBvvw5WNRH

    • AgentTesla

      Agent Tesla is a remote access tool (RAT) written in visual basic.

    • Detect Xworm Payload

    • Xworm

      Xworm is a remote access trojan written in C#.

    • Detect packed .NET executables. Mostly AgentTeslaV4.

    • Detects Windows executables referencing non-Windows User-Agents

    • Detects binaries (Windows and macOS) referencing many web browsers. Observed in information stealers.

    • Detects executables packed with SmartAssembly

    • Detects executables referencing Windows vault credential objects. Observed in infostealers

    • Detects executables referencing many confidential data stores found in browsers, mail clients, cryptocurreny wallets, etc. Observed in information stealers

    • Detects executables referencing many email and collaboration clients. Observed in information stealers

    • Detects executables referencing many file transfer clients. Observed in information stealers

    • Detects executables using Telegram Chat Bot

    • Checks computer location settings

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

    • Drops startup file

    • Executes dropped EXE

    • Loads dropped DLL

    • Reads WinSCP keys stored on the system

      Tries to access WinSCP stored sessions.

    • Reads data files stored by FTP clients

      Tries to access configuration files associated with programs like FileZilla.

    • Reads user/profile data of local email clients

      Email clients store some user data on disk where infostealers will often target it.

    • Reads user/profile data of web browsers

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

    • Adds Run key to start application

    • Looks up external IP address via web service

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

    • Suspicious use of SetThreadContext

MITRE ATT&CK Enterprise v15

Tasks