Overview

overview

10

Static

static

3bf66140ed...ed.exe

windows7_x64

10

3bf66140ed...ed.exe

windows10-2004_x64

10

Sharing

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General

  • Target

    3bf66140ed49d2b71c6674e064b26d605f196ec45b99cc2392802313918cd4ed

  • Size

    104KB

  • Sample

    220703-k1trqafbh3

  • MD5

    cfce7e045cb6ed8bdcab5460ea2ff37a

  • SHA1

    6bdc0c47643df5da4a583b0e23a8572a90d27ecd

  • SHA256

    3bf66140ed49d2b71c6674e064b26d605f196ec45b99cc2392802313918cd4ed

  • SHA512

    41d25210921915a7163daa4433a61f8c865a64829fa1d1ffd50a2dea7aa8aef66d3e7ed52229bac9e181c20b21543a3cb92251edcdce738e1735010bdba01279

Score
10/10
tofseeevasionpersistencetrojan

Malware Config

Extracted

Family

tofsee

C2

43.231.4.7

lazystax.ru

Targets

    • Target

      3bf66140ed49d2b71c6674e064b26d605f196ec45b99cc2392802313918cd4ed

    • Size

      104KB

    • MD5

      cfce7e045cb6ed8bdcab5460ea2ff37a

    • SHA1

      6bdc0c47643df5da4a583b0e23a8572a90d27ecd

    • SHA256

      3bf66140ed49d2b71c6674e064b26d605f196ec45b99cc2392802313918cd4ed

    • SHA512

      41d25210921915a7163daa4433a61f8c865a64829fa1d1ffd50a2dea7aa8aef66d3e7ed52229bac9e181c20b21543a3cb92251edcdce738e1735010bdba01279

    Score
    10/10
    tofseeevasionpersistencetrojan

    • Tofsee

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

      trojantofsee

    • Windows security bypass

      evasiontrojan

    • Creates new service(s)

      persistence

    • Executes dropped EXE

    • Modifies Windows Firewall

      evasion

    • Sets service image path in registry

      persistence

    • Checks computer location settings

      Looks up country code configured in the registry, likely geofence.

    • Deletes itself

    • Suspicious use of SetThreadContext

    behavioral1behavioral2

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

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

Credential Access

Discovery

Query Registry

1
T1012

System Information Discovery

2
T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Tasks