General

  • Target

    50% advance.xlsx

  • Size

    716KB

  • Sample

    230718-hw5bjsgg77

  • MD5

    a21634089f4284e5a98cba0fdccc0c2b

  • SHA1

    f76ae74d83aa6fd191b58de5b97a62b3f34ca575

  • SHA256

    f88a48d1b14bf973f60c9c7a1a12536798e62866508702618caacdc90cc3aae7

  • SHA512

    f46741e26f48d3cada98f1f3e1a0c56a2c267671ad6e491b8e0146b7df115962191dde8f2e41adcea7a1e1a37a5f1fb6e9303c039b0f43bd38d785c9ec7877b8

  • SSDEEP

    12288:zj9AzdrnD3ySLgeXC905gTRVCftMR2Wn5i17rOvNg2IIQsJw0GOMB+0yxT8CLz1A:zCzZnTLpXE05gTRVCfcQcyiJw0dMBq36

Malware Config

Extracted

Family

agenttesla

Credentials

Targets

    • Target

      50% advance.xlsx

    • Size

      716KB

    • MD5

      a21634089f4284e5a98cba0fdccc0c2b

    • SHA1

      f76ae74d83aa6fd191b58de5b97a62b3f34ca575

    • SHA256

      f88a48d1b14bf973f60c9c7a1a12536798e62866508702618caacdc90cc3aae7

    • SHA512

      f46741e26f48d3cada98f1f3e1a0c56a2c267671ad6e491b8e0146b7df115962191dde8f2e41adcea7a1e1a37a5f1fb6e9303c039b0f43bd38d785c9ec7877b8

    • SSDEEP

      12288:zj9AzdrnD3ySLgeXC905gTRVCftMR2Wn5i17rOvNg2IIQsJw0GOMB+0yxT8CLz1A:zCzZnTLpXE05gTRVCfcQcyiJw0dMBq36

    • 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.

    • 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.

    • Suspicious use of SetThreadContext

MITRE ATT&CK Enterprise v6

Tasks