General

  • Target

    file.exe

  • Size

    302KB

  • Sample

    221219-tn3crsfd76

  • MD5

    32dbcdd1bdf62b27fd78893ec0fc885a

  • SHA1

    999d1164d8f90cf4451b17b0faa9dc7e1e70e36a

  • SHA256

    c89cd0e72d30cd64c972295f43322f551340c4bdad9aef49554dc1f0c103517f

  • SHA512

    8babf4a8b75d3ee3138b08c247444086850690ace02fbfcb7f3aed2e5936e64bd152a85474950dde9a23865cbc9c7a35c24dfe7f28671656dd251a93df78ae10

  • SSDEEP

    6144:CLeUZhB0RgCdHJpizQCq/pGRz+3ng+E49HwchLP3i:CCUBQnAKBAwnVZH9P3

Malware Config

Extracted

Family

tofsee

C2

svartalfheim.top

jotunheim.name

Targets

    • Target

      file.exe

    • Size

      302KB

    • MD5

      32dbcdd1bdf62b27fd78893ec0fc885a

    • SHA1

      999d1164d8f90cf4451b17b0faa9dc7e1e70e36a

    • SHA256

      c89cd0e72d30cd64c972295f43322f551340c4bdad9aef49554dc1f0c103517f

    • SHA512

      8babf4a8b75d3ee3138b08c247444086850690ace02fbfcb7f3aed2e5936e64bd152a85474950dde9a23865cbc9c7a35c24dfe7f28671656dd251a93df78ae10

    • SSDEEP

      6144:CLeUZhB0RgCdHJpizQCq/pGRz+3ng+E49HwchLP3i:CCUBQnAKBAwnVZH9P3

    • 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