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General

  • Target

    file.exe

  • Size

    227KB

  • Sample

    221227-ajw6eaea53

  • MD5

    faf898c01373275e3bb189552deba2b8

  • SHA1

    9d2613efe4dc0a32a7e8e4ff465451d323dc6282

  • SHA256

    4e751c673dd0475d5936d7b7dbc1f1fdd0954d5ff791f939a2c05b7ff7650142

  • SHA512

    7e63b965962fc55c441aaa6852e804cf34a76a5d18c36eaf64d34c61700c31f9a2be02046becafb573144cb269fe5c75ead9ff95537b4fd1babf574b0990eea8

  • SSDEEP

    3072:IYT3+Lfq5bb39U2ocK8xRK4moWBICsjLpt6R1hN8+T+V+Y700:ELf22JcKzcH6FK+T+Vl7l

Malware Config

Extracted

Family

tofsee

C2

svartalfheim.top

jotunheim.name

Targets

    • Target

      file.exe

    • Size

      227KB

    • MD5

      faf898c01373275e3bb189552deba2b8

    • SHA1

      9d2613efe4dc0a32a7e8e4ff465451d323dc6282

    • SHA256

      4e751c673dd0475d5936d7b7dbc1f1fdd0954d5ff791f939a2c05b7ff7650142

    • SHA512

      7e63b965962fc55c441aaa6852e804cf34a76a5d18c36eaf64d34c61700c31f9a2be02046becafb573144cb269fe5c75ead9ff95537b4fd1babf574b0990eea8

    • SSDEEP

      3072:IYT3+Lfq5bb39U2ocK8xRK4moWBICsjLpt6R1hN8+T+V+Y700:ELf22JcKzcH6FK+T+Vl7l

    • 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)

    • Executes dropped EXE

    • 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

    • Drops file in System32 directory

    • Suspicious use of SetThreadContext

MITRE ATT&CK Enterprise v6

Tasks