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

    299KB

  • Sample

    230207-aygz2agf74

  • MD5

    1f374aa76e90385b3697d554fb113906

  • SHA1

    7c70071eee00e510fdeb851df9fe1bd6aafed42e

  • SHA256

    71864f13775192cf8a30f8a9318b224818f6edc52eda6db27b38e549fde0d413

  • SHA512

    bac66f3ddcaa964982ab2f108e4354408a22ed68a322df8ad547cd1d0da3d8120e076747147927be4c63132f289b3cef6be6fa1dc423da951bdc5ee580ce4255

  • SSDEEP

    3072:Hfb6b8akULxbdRmbNPv2i3ClwyKy9gfACW4HluQjiMTE5HyNa5D:/zMLFyJRS4y0AC5FuQj9FNa

Score
10/10
tofseeevasionpersistencetrojan

Malware Config

Extracted

Family

tofsee

C2

svartalfheim.top

jotunheim.name

Targets

    • Target

      file.exe

    • Size

      299KB

    • MD5

      1f374aa76e90385b3697d554fb113906

    • SHA1

      7c70071eee00e510fdeb851df9fe1bd6aafed42e

    • SHA256

      71864f13775192cf8a30f8a9318b224818f6edc52eda6db27b38e549fde0d413

    • SHA512

      bac66f3ddcaa964982ab2f108e4354408a22ed68a322df8ad547cd1d0da3d8120e076747147927be4c63132f289b3cef6be6fa1dc423da951bdc5ee580ce4255

    • SSDEEP

      3072:Hfb6b8akULxbdRmbNPv2i3ClwyKy9gfACW4HluQjiMTE5HyNa5D:/zMLFyJRS4y0AC5FuQj9FNa

    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