General

  • Target
    OperaSetup (2).exe
  • Size 3.1MB
  • Sample260620-s5429afx7j
  • SHA256 5a4300757192b0190711fd048c666d70e3c613c937be50b550a60e4044925a60
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Targets

    • Target
      OperaSetup (2).exe
    • Size 3.1MB
    • SHA256 5a4300757192b0190711fd048c666d70e3c613c937be50b550a60e4044925a60
    • MD5 SHA1 SHA512 SSDEEP TLSH
    • Detects KillMBR

    • Family: KillMBR

      KillMBR is a trojan that attempts to overwrite the Master Boot Record.

    • Downloads MZ/PE file

    • Checks computer location settings

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

    • Executes dropped EXE

    • Loads dropped DLL

    • Reads user/profile data of web browsers

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

    • Contacts third-party web service commonly abused for C2

      Legitimate web (hosting) services can be abused by malware authors to host malware or C2s.

    • Enumerates connected drives

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

    • 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 v16

Tasks