General

  • Target

    file.exe

  • Size

    306KB

  • Sample

    230107-gzw9nsch27

  • MD5

    f7b091568e5278a5d4dd0ae5a2a32881

  • SHA1

    102f9d6905782ac5dd06e976532f64c0be3ae731

  • SHA256

    837982ce6faf139ca763b9a0f0c393d7923e301ad657a496c6d49b65b0ee2a18

  • SHA512

    e44db8bf3ef4bd9c0fd7b043b13e64b30cf705542f991b126f1383fad9968405cb1e05923f2756448cb951abcaf4911a69110ab8b42ea87ca7bc62b7d733df4e

  • SSDEEP

    3072:D3X7kkLuzx0XeLd559rvs3BhLts7qUusSFwi+z4QIrL3H4Z5KL0Ag+osWai6zSbv:zjLuFb95QyTxm7458g+Wai6Wb

Malware Config

Extracted

Family

tofsee

C2

svartalfheim.top

jotunheim.name

Targets

    • Target

      file.exe

    • Size

      306KB

    • MD5

      f7b091568e5278a5d4dd0ae5a2a32881

    • SHA1

      102f9d6905782ac5dd06e976532f64c0be3ae731

    • SHA256

      837982ce6faf139ca763b9a0f0c393d7923e301ad657a496c6d49b65b0ee2a18

    • SHA512

      e44db8bf3ef4bd9c0fd7b043b13e64b30cf705542f991b126f1383fad9968405cb1e05923f2756448cb951abcaf4911a69110ab8b42ea87ca7bc62b7d733df4e

    • SSDEEP

      3072:D3X7kkLuzx0XeLd559rvs3BhLts7qUusSFwi+z4QIrL3H4Z5KL0Ag+osWai6zSbv:zjLuFb95QyTxm7458g+Wai6Wb

    • 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