General

  • Target

    e5f297504744c01bec8a5903f55b7fcc149e39a334a1c1cb80960878604b5012

  • Size

    1.9MB

  • Sample

    231127-wasbrabb24

  • MD5

    bb83e8db740d3441abb88dc34fd3759e

  • SHA1

    df23f4d993f1d7c2c596eeb79d2a4968747b314e

  • SHA256

    e5f297504744c01bec8a5903f55b7fcc149e39a334a1c1cb80960878604b5012

  • SHA512

    4b763bf081862b8b18225110e8cdb083b33ee46406695ea482abd2e2e3152b8a12526587172bb0cd76a1bd300c156b9257ae4ecf9952d695fc7cfa9059e32f07

  • SSDEEP

    24576:Y2gnhjtlJEVGylDWYMl2q9SASTcfRYO1BguRF7/FgvfzckJrvSmbuvF:Y2scwylVMlVwqRhxFMBJWdF

Malware Config

Targets

    • Target

      e5f297504744c01bec8a5903f55b7fcc149e39a334a1c1cb80960878604b5012

    • Size

      1.9MB

    • MD5

      bb83e8db740d3441abb88dc34fd3759e

    • SHA1

      df23f4d993f1d7c2c596eeb79d2a4968747b314e

    • SHA256

      e5f297504744c01bec8a5903f55b7fcc149e39a334a1c1cb80960878604b5012

    • SHA512

      4b763bf081862b8b18225110e8cdb083b33ee46406695ea482abd2e2e3152b8a12526587172bb0cd76a1bd300c156b9257ae4ecf9952d695fc7cfa9059e32f07

    • SSDEEP

      24576:Y2gnhjtlJEVGylDWYMl2q9SASTcfRYO1BguRF7/FgvfzckJrvSmbuvF:Y2scwylVMlVwqRhxFMBJWdF

    • Glupteba

      Glupteba is a modular loader written in Golang with various components.

    • Glupteba payload

    • UAC bypass

    • Windows security bypass

    • Downloads MZ/PE file

    • Modifies Windows Firewall

    • Checks computer location settings

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

    • Drops startup 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 web browsers

      Infostealers often target stored browser data, which can include saved credentials etc.

    • UPX packed file

      Detects executables packed with UPX/modified UPX open source packer.

    • Unexpected DNS network traffic destination

      Network traffic to other servers than the configured DNS servers was detected on the DNS port.

    • Windows security modification

    • Adds Run key to start application

    • Checks installed software on the system

      Looks up Uninstall key entries in the registry to enumerate software on the system.

    • Checks whether UAC is enabled

    • Enumerates connected drives

      Attempts to read the root path of hard drives other than the default C: drive.

    • Legitimate hosting services abused for malware hosting/C2

    • Manipulates WinMonFS driver.

      Roottkits write to WinMonFS to hide directories/files from being detected.

    • Drops file in System32 directory

    • Suspicious use of SetThreadContext

MITRE ATT&CK Enterprise v15

Tasks