Overview

overview

10

Static

static

file.exe

windows7-x64

10

file.exe

windows10-2004-x64

10

Sharing

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General

  • Target

    file.exe

  • Size

    192KB

  • Sample

    221202-fj517shh5w

  • MD5

    99c46fe2f6560e5f52c912fe41ebf031

  • SHA1

    09cfc9287b737405326a14ed100b0d109386b188

  • SHA256

    29958e28ed0f0649797e2d6450d934c6022ab672105e32283d3f8090f2f48fe5

  • SHA512

    8aa7c5fdf6fb15ebe857f1046daea8c47bb400110702f1ab02f96c0f75721753821d55e64ff0977903b526b3ca8cc0330e88944582e1a925e21f39614da9acec

  • SSDEEP

    3072:ag7i0AlCXTi2I5VPJmVtmIq9lj/iZqXQ/8nzkNaRs9E3AZxpR/wQnzhx:3iUTi9BY8I///8n45vp+a

Score
10/10
tofseeevasionpersistencetrojan

Malware Config

Extracted

Family

tofsee

C2

svartalfheim.top

jotunheim.name

Targets

    • Target

      file.exe

    • Size

      192KB

    • MD5

      99c46fe2f6560e5f52c912fe41ebf031

    • SHA1

      09cfc9287b737405326a14ed100b0d109386b188

    • SHA256

      29958e28ed0f0649797e2d6450d934c6022ab672105e32283d3f8090f2f48fe5

    • SHA512

      8aa7c5fdf6fb15ebe857f1046daea8c47bb400110702f1ab02f96c0f75721753821d55e64ff0977903b526b3ca8cc0330e88944582e1a925e21f39614da9acec

    • SSDEEP

      3072:ag7i0AlCXTi2I5VPJmVtmIq9lj/iZqXQ/8nzkNaRs9E3AZxpR/wQnzhx:3iUTi9BY8I///8n45vp+a

    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