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General

  • Target

    x (2).xls

  • Size

    323KB

  • Sample

    240417-k7b59acc4t

  • MD5

    2be86255d5c58c9d1452c9cf39a6a66d

  • SHA1

    058d72f3e45476408ffaca4ce9f7b39a05ed3405

  • SHA256

    e6be399576b6bc96254e00a8743115604bf1dff765789d3483d3650575de6129

  • SHA512

    7d00f8f3f4d7d287b3731cf7c6631824255066b1aae4adaa641837e258f34be7aa50ea3b42b2b9d4822fb10a9ef3ee0507851c6dedb36ed2fc98cd975c5e9d41

  • SSDEEP

    6144:cuunJ1qZ+RwPONXoRjDhIcp0fDlavx+fgLt0d6oivSbVjHyNI89GQ8PYZMm/wOGP:cvJ1J3bVjyNI89f8P4wTUoIEn

Malware Config

Extracted

Family

agenttesla

Credentials

Targets

    • Target

      x (2).xls

    • Size

      323KB

    • MD5

      2be86255d5c58c9d1452c9cf39a6a66d

    • SHA1

      058d72f3e45476408ffaca4ce9f7b39a05ed3405

    • SHA256

      e6be399576b6bc96254e00a8743115604bf1dff765789d3483d3650575de6129

    • SHA512

      7d00f8f3f4d7d287b3731cf7c6631824255066b1aae4adaa641837e258f34be7aa50ea3b42b2b9d4822fb10a9ef3ee0507851c6dedb36ed2fc98cd975c5e9d41

    • SSDEEP

      6144:cuunJ1qZ+RwPONXoRjDhIcp0fDlavx+fgLt0d6oivSbVjHyNI89GQ8PYZMm/wOGP:cvJ1J3bVjyNI89f8P4wTUoIEn

    • AgentTesla

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

    • Blocklisted process makes network request

    • Downloads MZ/PE file

    • Abuses OpenXML format to download file from external location

    • 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.

    • 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 v15

Tasks