General

  • Target

    TTXCopy22112022.xls

  • Size

    73KB

  • Sample

    221123-hsnjmahg91

  • MD5

    aa47fce5c9db6e06ad3116845f725fa6

  • SHA1

    eae3e06a94745bfac6d33236b891279924e7de6a

  • SHA256

    61fe9f95f15334c2d92d207799346870a43588b4c8870911ee76010c837aafed

  • SHA512

    4554ec8b3351686e83275229cbea44569f10d9ade388bf289eb16b29ee27b9d9f1b0a411d8be302d8c5214f2c6a8502c558628acc0ef017e5ba270a723f20ce8

  • SSDEEP

    1536:xkt09fj7aj46y8t3zdjPRBqpszI8rUbWpcVsffnmRDUu31dTXrX3:HUyi3zNFI8r8WuVsX231dH

Malware Config

Extracted

Family

agenttesla

Credentials

  • Protocol:
    smtp
  • Host:
    us2.smtp.mailhostbox.com
  • Port:
    587
  • Username:
    [email protected]
  • Password:
    s$xlD^f9

Targets

    • Target

      TTXCopy22112022.xls

    • Size

      73KB

    • MD5

      aa47fce5c9db6e06ad3116845f725fa6

    • SHA1

      eae3e06a94745bfac6d33236b891279924e7de6a

    • SHA256

      61fe9f95f15334c2d92d207799346870a43588b4c8870911ee76010c837aafed

    • SHA512

      4554ec8b3351686e83275229cbea44569f10d9ade388bf289eb16b29ee27b9d9f1b0a411d8be302d8c5214f2c6a8502c558628acc0ef017e5ba270a723f20ce8

    • SSDEEP

      1536:xkt09fj7aj46y8t3zdjPRBqpszI8rUbWpcVsffnmRDUu31dTXrX3:HUyi3zNFI8r8WuVsX231dH

    • AgentTesla

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

    • Blocklisted process makes network request

    • Downloads MZ/PE file

    • 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.

    • Uses the VBS compiler for execution

    • Accesses Microsoft Outlook profiles

    • 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.

    • Drops file in System32 directory

    • Suspicious use of SetThreadContext

MITRE ATT&CK Enterprise v6

Tasks