General
Target

3b716928bfac2bcc66212be3f9ab5a072ef620edf3e4b69148e4ecf14e634560

Size

139KB

Sample

220703-tx4xysafb4

Score
10/10
MD5

a2300b70e5420a971e380a21c4469387

SHA1

3fbd333c6314e91f9adf89a1b32186156c6d34bb

SHA256

3b716928bfac2bcc66212be3f9ab5a072ef620edf3e4b69148e4ecf14e634560

SHA512

2fbab93c5e9c50d5a1d8a03a3e26b0d13f84cd442afe2cd35e51c900e8495fb873abd49da2e83e7df1318f5297fde44355755acc92e8f2176b1de6246c2f1a03

Malware Config

Extracted

Family

tofsee

C2

43.231.4.7

lazystax.ru

Targets
Target

3b716928bfac2bcc66212be3f9ab5a072ef620edf3e4b69148e4ecf14e634560

MD5

a2300b70e5420a971e380a21c4469387

Filesize

139KB

Score
10/10
SHA1

3fbd333c6314e91f9adf89a1b32186156c6d34bb

SHA256

3b716928bfac2bcc66212be3f9ab5a072ef620edf3e4b69148e4ecf14e634560

SHA512

2fbab93c5e9c50d5a1d8a03a3e26b0d13f84cd442afe2cd35e51c900e8495fb873abd49da2e83e7df1318f5297fde44355755acc92e8f2176b1de6246c2f1a03

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