Overview

overview

10

Static

static

1

file.exe

windows7-x64

10

file.exe

windows10-2004-x64

10

Sharing

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General

  • Target

    file.exe

  • Size

    321KB

  • Sample

    230206-wa5l3sfb44

  • MD5

    6388175964e8a802a8a33fea99990f8e

  • SHA1

    a68f065464df424b726be370c209f47a4fb3755b

  • SHA256

    bb601ef5b3cef445b6f9eea25573ae26c8c40317278d8346fb289f283f3ebc47

  • SHA512

    c874f3900b47b6bd41f2275a360d7b97a0c5cf0e1df355dcfdb67c8d7e9124f646693bda305ce8d3937997b34d07de441ec7f0d16effbcb17c5524051d43c1d8

  • SSDEEP

    6144:frLZLCRK0YQ0q1x8CweTkzZzCCyruQj9ZExaMc:DLZGRKmxVT6hCnrljCa

Score
10/10
tofseeevasionpersistencetrojan

Malware Config

Extracted

Family

tofsee

C2

svartalfheim.top

jotunheim.name

Targets

    • Target

      file.exe

    • Size

      321KB

    • MD5

      6388175964e8a802a8a33fea99990f8e

    • SHA1

      a68f065464df424b726be370c209f47a4fb3755b

    • SHA256

      bb601ef5b3cef445b6f9eea25573ae26c8c40317278d8346fb289f283f3ebc47

    • SHA512

      c874f3900b47b6bd41f2275a360d7b97a0c5cf0e1df355dcfdb67c8d7e9124f646693bda305ce8d3937997b34d07de441ec7f0d16effbcb17c5524051d43c1d8

    • SSDEEP

      6144:frLZLCRK0YQ0q1x8CweTkzZzCCyruQj9ZExaMc:DLZGRKmxVT6hCnrljCa

    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

    • 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

    • Executes dropped EXE

    • Drops file in System32 directory

    • 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