General

  • Target

    file.exe

  • Size

    276KB

  • Sample

    230413-zqz83sfe9x

  • MD5

    80ee506064ae22c8ea34ffb2431f2488

  • SHA1

    0c5a71beb97751a781203d598e97e5a746df62df

  • SHA256

    77b5c60d25ee308a2c29e9363e105bfc42b3f0c6eb92285b620454f9c952d1eb

  • SHA512

    39be470cc5e8f170296371c7cfb7727b402e4c8b6e1ea6d66fe4195aa83f090cb9cf17d941dbb15214ae9e0a20f0015a190eb35a563067f2d645ea3f21609a6c

  • SSDEEP

    3072:/3czQeDsw9vCdirSqJ4GGueYDDwOtDUeblv8zMrnwg5o6JP3WJ0nWFok:GQmstdiDJ4xuHDwiDpd8z+w56J+Dak

Malware Config

Extracted

Family

tofsee

C2

vanaheim.cn

jotunheim.name

Targets

    • Target

      file.exe

    • Size

      276KB

    • MD5

      80ee506064ae22c8ea34ffb2431f2488

    • SHA1

      0c5a71beb97751a781203d598e97e5a746df62df

    • SHA256

      77b5c60d25ee308a2c29e9363e105bfc42b3f0c6eb92285b620454f9c952d1eb

    • SHA512

      39be470cc5e8f170296371c7cfb7727b402e4c8b6e1ea6d66fe4195aa83f090cb9cf17d941dbb15214ae9e0a20f0015a190eb35a563067f2d645ea3f21609a6c

    • SSDEEP

      3072:/3czQeDsw9vCdirSqJ4GGueYDDwOtDUeblv8zMrnwg5o6JP3WJ0nWFok:GQmstdiDJ4xuHDwiDpd8z+w56J+Dak

    • Tofsee

      Backdoor/botnet which carries out malicious activities based on commands from a C2 server.

    • xmrig

      XMRig is a high performance, open source, cross platform CPU/GPU miner.

    • XMRig Miner payload

    • Creates new service(s)

    • Modifies Windows Firewall

    • Sets service image path in registry

    • Checks computer location settings

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

    • Executes dropped EXE

    • Drops file in System32 directory

    • Suspicious use of SetThreadContext

MITRE ATT&CK Enterprise v6

Tasks