General

  • Target

    5b5cae86c3a28fc013bce2e327c424168e212220b8b284714bbccf9926e7cb6e

  • Size

    100KB

  • Sample

    220802-acl2vsbhcp

  • MD5

    1cf9e60b3473618bd5529a9a1f437f00

  • SHA1

    bbbad422efce52619ff7ec92f406f530e60f795d

  • SHA256

    5b5cae86c3a28fc013bce2e327c424168e212220b8b284714bbccf9926e7cb6e

  • SHA512

    46568261cbdfab0c78d326ac599ea5d2da4b222ec69e4e5fa6da05c9e67f7fc651004740d0e8ae47edc2e5f65ac8f635ad8489bed2c7c65f6e7517d5b075f5cc

Malware Config

Extracted

Family

tofsee

C2

43.231.4.7

lazystax.ru

Targets

    • Target

      5b5cae86c3a28fc013bce2e327c424168e212220b8b284714bbccf9926e7cb6e

    • Size

      100KB

    • MD5

      1cf9e60b3473618bd5529a9a1f437f00

    • SHA1

      bbbad422efce52619ff7ec92f406f530e60f795d

    • SHA256

      5b5cae86c3a28fc013bce2e327c424168e212220b8b284714bbccf9926e7cb6e

    • SHA512

      46568261cbdfab0c78d326ac599ea5d2da4b222ec69e4e5fa6da05c9e67f7fc651004740d0e8ae47edc2e5f65ac8f635ad8489bed2c7c65f6e7517d5b075f5cc

    • 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