General

  • Target

    file

  • Size

    275KB

  • Sample

    231007-l742psda25

  • MD5

    37e8afe822dc8d06078c73ab9e4816a1

  • SHA1

    e4b4b2dfd6a66a1dbea60d0ecbbcc23ccb7e7bcd

  • SHA256

    127a9938c53791b618ab9c7bebd7cf4213ca8d09edd66ba9b57d890b2d38b201

  • SHA512

    cbbbe76b3dbad8c277ffe3e6ab2c8964ea78cb6cb37f092fb78e5aab88a0eb496a127d4ee37e30484558263db28ca732e1f6f35e5219443aa1f9b2c683746897

  • SSDEEP

    3072:JBnLNZ4GUDwl1uuTwIJjtDuWe2+JKMN9PJ6g6w:bJZrUDwl1uuMIJjtKXLrPgg

Malware Config

Extracted

Family

tofsee

C2

vanaheim.cn

jotunheim.name

Targets

    • Target

      file

    • Size

      275KB

    • MD5

      37e8afe822dc8d06078c73ab9e4816a1

    • SHA1

      e4b4b2dfd6a66a1dbea60d0ecbbcc23ccb7e7bcd

    • SHA256

      127a9938c53791b618ab9c7bebd7cf4213ca8d09edd66ba9b57d890b2d38b201

    • SHA512

      cbbbe76b3dbad8c277ffe3e6ab2c8964ea78cb6cb37f092fb78e5aab88a0eb496a127d4ee37e30484558263db28ca732e1f6f35e5219443aa1f9b2c683746897

    • SSDEEP

      3072:JBnLNZ4GUDwl1uuTwIJjtDuWe2+JKMN9PJ6g6w:bJZrUDwl1uuMIJjtKXLrPgg

    • 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)

    • 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

    • Executes dropped EXE

    • Drops file in System32 directory

    • Suspicious use of SetThreadContext

MITRE ATT&CK Enterprise v15

Tasks