General

  • Target

    89352a8608dc6df3034d4e4a4ffaf43ad12ddc8c475ea74c390aa0186b2d0188

  • Size

    518KB

  • Sample

    220521-brxmkscdb8

  • MD5

    70e23c74d814b298d8d2a1555dd14e95

  • SHA1

    d25b354a03e95b78b4cff8b7f51cab206cab7c40

  • SHA256

    89352a8608dc6df3034d4e4a4ffaf43ad12ddc8c475ea74c390aa0186b2d0188

  • SHA512

    21fb14986e1a3a63754fde3b67d2634ede17378ca6b2376bc08a2c4c2051f9417df488a2dd5c63d8401407644ab3f59360256ef032aacfba49007cdfc9623879

Malware Config

Extracted

Family

agenttesla

Credentials

  • Protocol:
    smtp
  • Host:
    smtp.yandex.com
  • Port:
    587
  • Username:
    [email protected]
  • Password:
    gatefee22

Targets

    • Target

      _Invoice MV2063576.exe

    • Size

      602KB

    • MD5

      8ee650d9c83e5e105e523e1431cd6d58

    • SHA1

      96c13097506af7965036de864bf0ff48a842af5f

    • SHA256

      3845a8f1b22212dbb08c6a9c95c3cc765a2d9676dbe367acf2c24f845b264bf6

    • SHA512

      b071921b412e8a6dd1e3f2676cb836b7eb013d5c24a1d4976150b365f531a7c27480f196d6e9d4ee9086bdd7d66c39817c7ce5ce6b11fa6fe22eb6fa58292c4a

    • AgentTesla

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

    • AgentTesla Payload

    • Looks for VirtualBox Guest Additions in registry

    • ReZer0 packer

      Detects ReZer0, a packer with multiple versions used in various campaigns.

    • Looks for VMWare Tools registry key

    • Checks BIOS information in registry

      BIOS information is often read in order to detect sandboxing environments.

    • 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.

    • Accesses Microsoft Outlook profiles

    • Maps connected drives based on registry

      Disk information is often read in order to detect sandboxing environments.

    • Suspicious use of SetThreadContext

MITRE ATT&CK Enterprise v6

Tasks