General

  • Target
    cf99ce5474b53fbab5057cadcfb95a0da21163667a5af1341f5dd049da7c98b1.bin
  • Size 10.9MB
  • Sample261114-dwennsvs3k
  • SHA256 cf99ce5474b53fbab5057cadcfb95a0da21163667a5af1341f5dd049da7c98b1
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Extracted

Family
  • tofsee

C2
  • vanaheim.cn

  • jotunheim.name

Targets

    • Target
      cf99ce5474b53fbab5057cadcfb95a0da21163667a5af1341f5dd049da7c98b1.bin
    • Size 10.9MB
    • SHA256 cf99ce5474b53fbab5057cadcfb95a0da21163667a5af1341f5dd049da7c98b1
    • MD5 SHA1 SHA512 SSDEEP TLSH
    • Family: Tofsee

      Backdoor/botnet which carries out malicious activities based on commands from a C2 server.

    • Modifies Windows Firewall

    • Sets service image path in registry

      This determines the executable launched when a service starts. It can be used to establish persistence.

    • Checks computer location settings

      Looks up country code configured in the registry, likely geofence.

    • Creates new service(s)

    • Deletes itself

    • Executes dropped EXE

    • Windows security bypass

    • 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 v16

Tasks