Overview

overview

10

Static

static

3

e01f2cb490...9N.exe

windows7-x64

10

e01f2cb490...9N.exe

windows10-2004-x64

10

Sharing

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General

  • Target

    e01f2cb49081fb01eb0af6a7369d5b678b677f2e9811817ba7bbd854cb24b539N

  • Size

    249KB

  • Sample

    241005-wdd9assgrc

  • MD5

    35d94a64c3beb2bd39080b05fc763f70

  • SHA1

    5f08d3f5d0998b6eb80dd986b8efe628a5c58e19

  • SHA256

    e01f2cb49081fb01eb0af6a7369d5b678b677f2e9811817ba7bbd854cb24b539

  • SHA512

    5803cabffde0c2c62b94ce88d7243422badfc680522816d41e81b57ede4973132a3d3802b90e7dd379375409dd57d1232e796b541240819ade75b3ae2d39e2a4

  • SSDEEP

    3072:2GGHLMg57JJiSWbWkyYhnNh/RE/GtymuQ2fgu5NlssAxaxWT6Uf7J:RGHLMwlEBDxZY/Wmel

Score
10/10
tofseediscoveryevasionexecutionpersistenceprivilege_escalationtrojan

Malware Config

Extracted

Family

tofsee

C2

vanaheim.cn

jotunheim.name

Targets

    • Target

      e01f2cb49081fb01eb0af6a7369d5b678b677f2e9811817ba7bbd854cb24b539N

    • Size

      249KB

    • MD5

      35d94a64c3beb2bd39080b05fc763f70

    • SHA1

      5f08d3f5d0998b6eb80dd986b8efe628a5c58e19

    • SHA256

      e01f2cb49081fb01eb0af6a7369d5b678b677f2e9811817ba7bbd854cb24b539

    • SHA512

      5803cabffde0c2c62b94ce88d7243422badfc680522816d41e81b57ede4973132a3d3802b90e7dd379375409dd57d1232e796b541240819ade75b3ae2d39e2a4

    • SSDEEP

      3072:2GGHLMg57JJiSWbWkyYhnNh/RE/GtymuQ2fgu5NlssAxaxWT6Uf7J:RGHLMwlEBDxZY/Wmel

    Score
    10/10
    tofseediscoveryevasionexecutionpersistenceprivilege_escalationtrojan

    • Tofsee

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

      trojantofsee

    • Windows security bypass

      evasiontrojan

    • Creates new service(s)

      persistenceexecution

    • 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

    • Looks up external IP address via web service

      Uses a legitimate IP lookup service to find the infected system's external IP.

    • Drops file in System32 directory

    • Suspicious use of SetThreadContext

    behavioral1behavioral2

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

System Services

1
T1569

Service Execution

1
T1569.002

Persistence

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Create or Modify System Process

2
T1543

Windows Service

2
T1543.003

Event Triggered Execution

1
T1546

Netsh Helper DLL

1
T1546.007

Privilege Escalation

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Create or Modify System Process

2
T1543

Windows Service

2
T1543.003

Event Triggered Execution

1
T1546

Netsh Helper DLL

1
T1546.007

Defense Evasion

Impair Defenses

2
T1562

Disable or Modify System Firewall

1
T1562.004

Disable or Modify Tools

1
T1562.001

Modify Registry

2
T1112

Credential Access

Discovery

Query Registry

1
T1012

System Information Discovery

2
T1082

System Location Discovery

1
T1614

System Language Discovery

1
T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Tasks