General

  • Target

    b9ed438f763584171822b73a28273427a0923cca26b8e40b008e3aefbcf48d79.exe

  • Size

    790KB

  • Sample

    240213-fk8tgscb5x

  • MD5

    4139eb079206e8a99e5a801a5f2c74d0

  • SHA1

    62baf3ff2623429dd7c3a9e2c011e8419482b833

  • SHA256

    b9ed438f763584171822b73a28273427a0923cca26b8e40b008e3aefbcf48d79

  • SHA512

    f395f99bcd7ed5afa486c4587d2ceeb821a68cbae00af0b4e9f7a5211cd5d53038f26008a6af88fdce1cf9137187ea210c1a85f061ddd1f532978d9576bdb674

  • SSDEEP

    24576:SpNlCZoi0e8UZDdEVjZ7OifqWC+cn4Mfo68bsh:Sf+oirDMXHC+Q40ab

Malware Config

Extracted

Family

agenttesla

Credentials

Targets

    • Target

      b9ed438f763584171822b73a28273427a0923cca26b8e40b008e3aefbcf48d79.exe

    • Size

      790KB

    • MD5

      4139eb079206e8a99e5a801a5f2c74d0

    • SHA1

      62baf3ff2623429dd7c3a9e2c011e8419482b833

    • SHA256

      b9ed438f763584171822b73a28273427a0923cca26b8e40b008e3aefbcf48d79

    • SHA512

      f395f99bcd7ed5afa486c4587d2ceeb821a68cbae00af0b4e9f7a5211cd5d53038f26008a6af88fdce1cf9137187ea210c1a85f061ddd1f532978d9576bdb674

    • SSDEEP

      24576:SpNlCZoi0e8UZDdEVjZ7OifqWC+cn4Mfo68bsh:Sf+oirDMXHC+Q40ab

    • AgentTesla

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

    • Detect packed .NET executables. Mostly AgentTeslaV4.

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

    • Detects binaries and memory artifacts referencing sandbox DLLs typically observed in sandbox evasion

    • 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

    • Checks computer location settings

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

    • 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.

    • Suspicious use of SetThreadContext

MITRE ATT&CK Enterprise v15

Tasks