General

  • Target
    MV HEILAN SONG V2004.doc
  • Size 211KB
  • Sample201001-9j96bw79ex
  • SHA256 0deba8ea85be06af543e5135150d4f7fe5d9e6d1bbaf41213fec2f2c9dbe3d8e
  • MD5 SHA1 SHA512

Malware Config

Extracted

Language
  • ps1

Deobfuscated
Source
URLs
  • exe.dropper

    httP://198.12.66.102/vsl.exe

Extracted

Family
  • agenttesla

Credentials
  • Protocol

    smtp

  • Host

    smtp.stevenlkornsteinlawfirm.com

  • Port

    587

  • Password

    T:gr:A2t{7ai

Targets

    • Target
      MV HEILAN SONG V2004.doc
    • Size 211KB
    • SHA256 0deba8ea85be06af543e5135150d4f7fe5d9e6d1bbaf41213fec2f2c9dbe3d8e
    • MD5 SHA1 SHA512
    • AgentTesla

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

    • Process spawned unexpected child process

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

    • AgentTesla Payload

    • Blocklisted process makes network request

    • Executes dropped EXE

    • Loads dropped DLL

    • 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

    • Legitimate hosting services abused for malware hosting/C2

    • Suspicious use of NtSetInformationThreadHideFromDebugger

    • Suspicious use of SetThreadContext

MITRE ATT&CK Enterprise v6

Tasks