General

  • Target

    file.exe

  • Size

    234KB

  • Sample

    230515-xx7wdsha49

  • MD5

    f8df432779abcda0e118d44dc6dde5c7

  • SHA1

    2574314f96737d4a909246b06f6d0904b1b0e6f6

  • SHA256

    668a73171bcfb225ce6748ef6108fa8bf9b02befb5ba5f392cdcff67926d78a2

  • SHA512

    43974649ae90e164b8a17288c8c8b249dcdbac0a0c4fc9cdac70edbea455f880be7642e03c33e882e3a0bfaeccca46636398a604867451be52e059fc5fb1e75f

  • SSDEEP

    3072:5fPQrqA+LychM1+ziXtcsM/RHbyp+EpsVNg0cqF2Oq5pqIyYnAZ81MZ:mE1MOYcb/jxBUOqptZnAa1MZ

Malware Config

Extracted

Family

tofsee

C2

vanaheim.cn

jotunheim.name

Targets

    • Target

      file.exe

    • Size

      234KB

    • MD5

      f8df432779abcda0e118d44dc6dde5c7

    • SHA1

      2574314f96737d4a909246b06f6d0904b1b0e6f6

    • SHA256

      668a73171bcfb225ce6748ef6108fa8bf9b02befb5ba5f392cdcff67926d78a2

    • SHA512

      43974649ae90e164b8a17288c8c8b249dcdbac0a0c4fc9cdac70edbea455f880be7642e03c33e882e3a0bfaeccca46636398a604867451be52e059fc5fb1e75f

    • SSDEEP

      3072:5fPQrqA+LychM1+ziXtcsM/RHbyp+EpsVNg0cqF2Oq5pqIyYnAZ81MZ:mE1MOYcb/jxBUOqptZnAa1MZ

    • 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 v6

Tasks