General

  • Target

    5dfa515315f72a107d3541ea8fa804fd364daf867578fc70e131ec52613b58c3

  • Size

    312KB

  • Sample

    220731-1pr2raageq

  • MD5

    239efbf95c2860f12e662a99b3565f48

  • SHA1

    05c15510420333d3d737d7fe97e21d0c05ca081e

  • SHA256

    5dfa515315f72a107d3541ea8fa804fd364daf867578fc70e131ec52613b58c3

  • SHA512

    4b256ab638ab603aeffdcb952b08e593e05d09a2d0cf6f220afd8ab9750491ec8e8ae1371515a69fd6ad2e2633dce29848e9e00040e9e64e1300c62bc335aee3

Malware Config

Extracted

Family

tofsee

C2

43.231.4.7

lazystax.ru

Targets

    • Target

      5dfa515315f72a107d3541ea8fa804fd364daf867578fc70e131ec52613b58c3

    • Size

      312KB

    • MD5

      239efbf95c2860f12e662a99b3565f48

    • SHA1

      05c15510420333d3d737d7fe97e21d0c05ca081e

    • SHA256

      5dfa515315f72a107d3541ea8fa804fd364daf867578fc70e131ec52613b58c3

    • SHA512

      4b256ab638ab603aeffdcb952b08e593e05d09a2d0cf6f220afd8ab9750491ec8e8ae1371515a69fd6ad2e2633dce29848e9e00040e9e64e1300c62bc335aee3

    • 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