General
Target

4c536a8728b5a2207332856d9aea7be3be41f0b2a921c049a73894e371ca6cb0

Size

341KB

Sample

220625-j56fmsehe3

Score
10/10
MD5

c8a7a319ce6c507a8fa2b90c201c728e

SHA1

d0683f663b502598c4f2c543cb1c2554eebd6e61

SHA256

4c536a8728b5a2207332856d9aea7be3be41f0b2a921c049a73894e371ca6cb0

SHA512

98c46849126cf94a3a9ac7c0c7e6525f44e2b46b77d6700e7c0adc61054b78f9cdc3d7bddecaf1ed4922d5f5af8c0426396ee26dcb31970225523118666864fc

Malware Config

Extracted

Family

tofsee

C2

43.231.4.7

lazystax.ru

Targets
Target

4c536a8728b5a2207332856d9aea7be3be41f0b2a921c049a73894e371ca6cb0

MD5

c8a7a319ce6c507a8fa2b90c201c728e

Filesize

341KB

Score
10/10
SHA1

d0683f663b502598c4f2c543cb1c2554eebd6e61

SHA256

4c536a8728b5a2207332856d9aea7be3be41f0b2a921c049a73894e371ca6cb0

SHA512

98c46849126cf94a3a9ac7c0c7e6525f44e2b46b77d6700e7c0adc61054b78f9cdc3d7bddecaf1ed4922d5f5af8c0426396ee26dcb31970225523118666864fc

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