General
Target

3bf66140ed49d2b71c6674e064b26d605f196ec45b99cc2392802313918cd4ed

Size

104KB

Sample

220703-k1trqafbh3

Score
10/10
MD5

cfce7e045cb6ed8bdcab5460ea2ff37a

SHA1

6bdc0c47643df5da4a583b0e23a8572a90d27ecd

SHA256

3bf66140ed49d2b71c6674e064b26d605f196ec45b99cc2392802313918cd4ed

SHA512

41d25210921915a7163daa4433a61f8c865a64829fa1d1ffd50a2dea7aa8aef66d3e7ed52229bac9e181c20b21543a3cb92251edcdce738e1735010bdba01279

Malware Config

Extracted

Family

tofsee

C2

43.231.4.7

lazystax.ru

Targets
Target

3bf66140ed49d2b71c6674e064b26d605f196ec45b99cc2392802313918cd4ed

MD5

cfce7e045cb6ed8bdcab5460ea2ff37a

Filesize

104KB

Score
10/10
SHA1

6bdc0c47643df5da4a583b0e23a8572a90d27ecd

SHA256

3bf66140ed49d2b71c6674e064b26d605f196ec45b99cc2392802313918cd4ed

SHA512

41d25210921915a7163daa4433a61f8c865a64829fa1d1ffd50a2dea7aa8aef66d3e7ed52229bac9e181c20b21543a3cb92251edcdce738e1735010bdba01279

Tags

Signatures

  • Tofsee

    Description

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

    Tags

  • Windows security bypass

    Tags

    TTPs

    Disabling Security ToolsModify Registry
  • Creates new service(s)

    Tags

    TTPs

    New Service
  • Executes dropped EXE

  • Modifies Windows Firewall

    Tags

    TTPs

    Modify Existing Service
  • Sets service image path in registry

    Tags

    TTPs

    Registry Run Keys / Startup FolderModify Registry
  • Checks computer location settings

    Description

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

    TTPs

    Query RegistrySystem Information Discovery
  • Deletes itself

  • Suspicious use of SetThreadContext

Related Tasks

MITRE ATT&CK Matrix
Collection
    Command and Control
      Credential Access
        Execution
          Exfiltration
            Impact
              Initial Access
                Lateral Movement
                  Privilege Escalation
                    Tasks

                    static1

                    Score
                    N/A

                    behavioral1

                    Score
                    10/10

                    behavioral2

                    Score
                    10/10