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General

  • Target

    38eca8e8f88a15c11fdfeadf43c454386d27f479eb1235ae4ddaf3958624ba0a_JC.exe

  • Size

    234KB

  • Sample

    231001-yh2aqsee35

  • MD5

    3e54bc559813b3b887de44604644a083

  • SHA1

    6af11930891b523991ee1115c15e9d72b46f3a28

  • SHA256

    38eca8e8f88a15c11fdfeadf43c454386d27f479eb1235ae4ddaf3958624ba0a

  • SHA512

    38a25887bf7ef217dc4ab88a734fdb41a46bc675cde1fe3a7217810754f6bd9be1410c6c2df5bb7d70ff38df20cc828c89fe1d66f0d906e1f37be07760147133

  • SSDEEP

    3072:HDER0MfinkOKUtMSdWxLZ9dUMglZlwrrKST4S5/RFleRATO34:EfQZdWjXUhZ6ZvR0ATV

Malware Config

Extracted

Family

tofsee

C2

vanaheim.cn

jotunheim.name

Targets

    • Target

      38eca8e8f88a15c11fdfeadf43c454386d27f479eb1235ae4ddaf3958624ba0a_JC.exe

    • Size

      234KB

    • MD5

      3e54bc559813b3b887de44604644a083

    • SHA1

      6af11930891b523991ee1115c15e9d72b46f3a28

    • SHA256

      38eca8e8f88a15c11fdfeadf43c454386d27f479eb1235ae4ddaf3958624ba0a

    • SHA512

      38a25887bf7ef217dc4ab88a734fdb41a46bc675cde1fe3a7217810754f6bd9be1410c6c2df5bb7d70ff38df20cc828c89fe1d66f0d906e1f37be07760147133

    • SSDEEP

      3072:HDER0MfinkOKUtMSdWxLZ9dUMglZlwrrKST4S5/RFleRATO34:EfQZdWjXUhZ6ZvR0ATV

    • 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

    • Looks up external IP address via web service

      Uses a legitimate IP lookup service to find the infected system's external IP.

    • Drops file in System32 directory

    • Suspicious use of SetThreadContext

MITRE ATT&CK Enterprise v15

Tasks