General

  • Target

    file

  • Size

    306KB

  • Sample

    221219-h5x9laed89

  • MD5

    29dbe2f0a75d863a9009d2d864405a86

  • SHA1

    1ddf7e3f48bc8fe456f468b3469745c80abe524c

  • SHA256

    7f1a402fbd3b09a5907996205922dda81345fd3691cab005bf0e20d34a991800

  • SHA512

    e03a00da3f3380741835ecb5e243328e2bf786f0f44d0717128a1e4822edec27dda647e41b78e2fe6001ac769bf3dd66d58693969487d8548dbcb779670ff586

  • SSDEEP

    6144:sSFwOLTw0rNzr9Ap/7fHX2FIiPfahxq0iPvzpQ6rFiaI:syvw05zr9Apzf33iPKxqxnzpQ6rF

Malware Config

Extracted

Family

tofsee

C2

svartalfheim.top

jotunheim.name

Targets

    • Target

      file

    • Size

      306KB

    • MD5

      29dbe2f0a75d863a9009d2d864405a86

    • SHA1

      1ddf7e3f48bc8fe456f468b3469745c80abe524c

    • SHA256

      7f1a402fbd3b09a5907996205922dda81345fd3691cab005bf0e20d34a991800

    • SHA512

      e03a00da3f3380741835ecb5e243328e2bf786f0f44d0717128a1e4822edec27dda647e41b78e2fe6001ac769bf3dd66d58693969487d8548dbcb779670ff586

    • SSDEEP

      6144:sSFwOLTw0rNzr9Ap/7fHX2FIiPfahxq0iPvzpQ6rFiaI:syvw05zr9Apzf33iPKxqxnzpQ6rF

    • 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