General

  • Target

    55b3ccbe7bfce58fa9fbdbf2d7d492aa8c9def31d73982ac7e8b4ed3092e5f7c

  • Size

    105KB

  • Sample

    220725-smgt1abfh6

  • MD5

    e96dc72743408632ec53b7bc90d4dc7f

  • SHA1

    6495db6d82ec97db7e088e04c154125cebde9923

  • SHA256

    55b3ccbe7bfce58fa9fbdbf2d7d492aa8c9def31d73982ac7e8b4ed3092e5f7c

  • SHA512

    4c9a6d745f8fa58a5a507c1389277e3d33b23c44ee51f354a0e8c86d734324ae1703b8a2349de9d7fe19bc484ad3b8e25c59088d07773517807e51c990846140

Malware Config

Extracted

Family

tofsee

C2

43.231.4.7

lazystax.ru

Targets

    • Target

      55b3ccbe7bfce58fa9fbdbf2d7d492aa8c9def31d73982ac7e8b4ed3092e5f7c

    • Size

      105KB

    • MD5

      e96dc72743408632ec53b7bc90d4dc7f

    • SHA1

      6495db6d82ec97db7e088e04c154125cebde9923

    • SHA256

      55b3ccbe7bfce58fa9fbdbf2d7d492aa8c9def31d73982ac7e8b4ed3092e5f7c

    • SHA512

      4c9a6d745f8fa58a5a507c1389277e3d33b23c44ee51f354a0e8c86d734324ae1703b8a2349de9d7fe19bc484ad3b8e25c59088d07773517807e51c990846140

    • Tofsee

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

    • Windows security bypass

    • 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

Disabling Security Tools

1
T1089

Modify Registry

2
T1112

Discovery

Query Registry

1
T1012

System Information Discovery

2
T1082

Tasks