General

  • Target

    file.exe

  • Size

    213KB

  • Sample

    221220-r3514aab45

  • MD5

    cb8cfdd3af63eaa602a08b26f9994322

  • SHA1

    6f25fb241e1f1810b483fdb5b2b889f1ce448423

  • SHA256

    ccb7d26fdb3482caa21429847a326b9df999211c9d6009980f62faf6eb97e27d

  • SHA512

    3ca77dff4e238a84c9b999b3bf62af5cdb023089fa02c46c9d1e8070eafd14fc54e2787d0a827aa006bfd93a4aa78772ad5efe9bb6515f69a12dcda99c01895b

  • SSDEEP

    3072:DOTLBA7RmQHyebf8sQx5EEKZPUpLRLujxb57b/wYZbWNHCDml:ULBHebEvycUzLbkCa

Malware Config

Extracted

Family

tofsee

C2

svartalfheim.top

jotunheim.name

Targets

    • Target

      file.exe

    • Size

      213KB

    • MD5

      cb8cfdd3af63eaa602a08b26f9994322

    • SHA1

      6f25fb241e1f1810b483fdb5b2b889f1ce448423

    • SHA256

      ccb7d26fdb3482caa21429847a326b9df999211c9d6009980f62faf6eb97e27d

    • SHA512

      3ca77dff4e238a84c9b999b3bf62af5cdb023089fa02c46c9d1e8070eafd14fc54e2787d0a827aa006bfd93a4aa78772ad5efe9bb6515f69a12dcda99c01895b

    • SSDEEP

      3072:DOTLBA7RmQHyebf8sQx5EEKZPUpLRLujxb57b/wYZbWNHCDml:ULBHebEvycUzLbkCa

    • 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