General

  • Target

    5f1237952a865108d43ba926ca2310cf7176e6fcc38dd1ce387f6e75f6eafc6e

  • Size

    153KB

  • Sample

    220731-wz5ndabab8

  • MD5

    581fd522171bdcb6867fe89afd9f8cd6

  • SHA1

    e62b04de12535623e835c467e90a1fcc8ca02a91

  • SHA256

    5f1237952a865108d43ba926ca2310cf7176e6fcc38dd1ce387f6e75f6eafc6e

  • SHA512

    b7ce6b3cd0091f5192d71ed8bd3a266eb0a8d9ac3336dee5373a81cbc679bbcce8fdef7030136abc72a33cfec57926967551db18c3371069e63d6a7616921764

Malware Config

Extracted

Family

tofsee

C2

43.231.4.7

lazystax.ru

Targets

    • Target

      5f1237952a865108d43ba926ca2310cf7176e6fcc38dd1ce387f6e75f6eafc6e

    • Size

      153KB

    • MD5

      581fd522171bdcb6867fe89afd9f8cd6

    • SHA1

      e62b04de12535623e835c467e90a1fcc8ca02a91

    • SHA256

      5f1237952a865108d43ba926ca2310cf7176e6fcc38dd1ce387f6e75f6eafc6e

    • SHA512

      b7ce6b3cd0091f5192d71ed8bd3a266eb0a8d9ac3336dee5373a81cbc679bbcce8fdef7030136abc72a33cfec57926967551db18c3371069e63d6a7616921764

    • 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