General

  • Target

    5bb633fef2f50ca5ec2302ea37800f68c76596ef770c394e706f57a5d655feac

  • Size

    137KB

  • Sample

    220801-vfcmtadhc9

  • MD5

    8a7bd882918e72bdf0ac40577f380ddb

  • SHA1

    fad079d8ea6e73146d55ac5ca26745f5bdc2c02d

  • SHA256

    5bb633fef2f50ca5ec2302ea37800f68c76596ef770c394e706f57a5d655feac

  • SHA512

    b57d44daace9962ac0926bd6ae09c8c3a2998cbbf777ba3a367c82a2c3b948b8355180b65b10d150ec9f6900bc29785e21c90e07199b8b761f5111f91b0c1db7

Malware Config

Extracted

Family

tofsee

C2

43.231.4.7

lazystax.ru

Targets

    • Target

      5bb633fef2f50ca5ec2302ea37800f68c76596ef770c394e706f57a5d655feac

    • Size

      137KB

    • MD5

      8a7bd882918e72bdf0ac40577f380ddb

    • SHA1

      fad079d8ea6e73146d55ac5ca26745f5bdc2c02d

    • SHA256

      5bb633fef2f50ca5ec2302ea37800f68c76596ef770c394e706f57a5d655feac

    • SHA512

      b57d44daace9962ac0926bd6ae09c8c3a2998cbbf777ba3a367c82a2c3b948b8355180b65b10d150ec9f6900bc29785e21c90e07199b8b761f5111f91b0c1db7

    • Tofsee

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

    • Creates new service(s)

    • Executes dropped EXE

    • 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

    • Suspicious use of SetThreadContext

MITRE ATT&CK Matrix ATT&CK v6

Persistence

New Service

1
T1050

Modify Existing Service

1
T1031

Registry Run Keys / Startup Folder

1
T1060

Privilege Escalation

New Service

1
T1050

Defense Evasion

Modify Registry

1
T1112

Discovery

Query Registry

1
T1012

System Information Discovery

2
T1082

Tasks