General

  • Target

    file.exe

  • Size

    227KB

  • Sample

    230917-vgs17abe2w

  • MD5

    968d7b91a331234c30946bf3b6834e85

  • SHA1

    b8fd455add6140b20fbb1244d9cd33a7cec9f85b

  • SHA256

    c5fc6da4ebc5e3685e3b4d162d52a0688edfd1dae0d202a921b470cb7dd08cf9

  • SHA512

    e5b0987e099c8735da2ca5b5d7913735f0923bce8226937466fa967babf25e4a71537fea81e354b95fa08e260c401042177abea6e323a1016e306e49c9ae0629

  • SSDEEP

    3072:WEL7fZAMg8P9yo8ZGkAlhk/V3yDBzAlz:pfmMg5o8ZuKiDRA

Malware Config

Extracted

Family

tofsee

C2

vanaheim.cn

jotunheim.name

Targets

    • Target

      file.exe

    • Size

      227KB

    • MD5

      968d7b91a331234c30946bf3b6834e85

    • SHA1

      b8fd455add6140b20fbb1244d9cd33a7cec9f85b

    • SHA256

      c5fc6da4ebc5e3685e3b4d162d52a0688edfd1dae0d202a921b470cb7dd08cf9

    • SHA512

      e5b0987e099c8735da2ca5b5d7913735f0923bce8226937466fa967babf25e4a71537fea81e354b95fa08e260c401042177abea6e323a1016e306e49c9ae0629

    • SSDEEP

      3072:WEL7fZAMg8P9yo8ZGkAlhk/V3yDBzAlz:pfmMg5o8ZuKiDRA

    • Tofsee

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

    • Windows security bypass

    • 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.

    • Deletes itself

    • Executes dropped EXE

    • Drops file in System32 directory

    • Suspicious use of SetThreadContext

MITRE ATT&CK Enterprise v15

Tasks