General

  • Target

    https://wdl1.pcfg.cache.wpscdn.com/wpsdl/wpsoffice/onlinesetup/distsrc/200.1095/wpsinst/wps_office_inst.exe

  • Sample

    240523-zp6z8sgb34

Malware Config

Targets

    • Target

      https://wdl1.pcfg.cache.wpscdn.com/wpsdl/wpsoffice/onlinesetup/distsrc/200.1095/wpsinst/wps_office_inst.exe

    • Modifies boot configuration data using bcdedit

    • Blocklisted process makes network request

    • Downloads MZ/PE file

    • Checks computer location settings

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

    • Executes dropped EXE

    • Loads dropped DLL

    • Modifies system executable filetype association

    • Reads user/profile data of web browsers

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

    • Registers COM server for autorun

    • Unexpected DNS network traffic destination

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

    • 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

    • Writes to the Master Boot Record (MBR)

      Bootkits write to the MBR to gain persistence at a level below the operating system.

MITRE ATT&CK Enterprise v15

Tasks