Overview

overview

10

Static

static

3

3555ecd8bb...a3.exe

windows7-x64

10

3555ecd8bb...a3.exe

windows10-2004-x64

10

Sharing

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General

  • Target

    5083b1192a324408f6d051f056f67dccc84fed4142482ad2c3d5c98ae3b2f3b0

  • Size

    127KB

  • Sample

    240417-qkwt2aaf5s

  • MD5

    8023b15dbe62f42f022bdbc6688b947f

  • SHA1

    1c3f70eb39700700a78bb0ccbeee2d22d986f3a6

  • SHA256

    5083b1192a324408f6d051f056f67dccc84fed4142482ad2c3d5c98ae3b2f3b0

  • SHA512

    a6ca2d20b42d8ffa0883883661ca65c204490491e5bf77bf12afdeef340fe8eb8219b1e29ba8571147486b334b878b4de9f9a40b5e1fe6a891d7ea06eebe49d6

  • SSDEEP

    3072:btXeK60UIAMe5dfFEa0Wux7CNvhOycoZRe:ZAcer0WuCNpOycoZRe

Score
10/10
tofseeevasionpersistencetrojan

Malware Config

Extracted

Family

tofsee

C2

vanaheim.cn

jotunheim.name

Targets

    • Target

      3555ecd8bb270312994e03bf64695a3f1c0213a2abf85b890ebe2bb40a9648a3.exe

    • Size

      203KB

    • MD5

      e80ed6ccb333b7fc33ffc98bca43b57d

    • SHA1

      170281a608fe94eee06a9f45466f6a47bd2272e3

    • SHA256

      3555ecd8bb270312994e03bf64695a3f1c0213a2abf85b890ebe2bb40a9648a3

    • SHA512

      3209c004cebb1e2f544f7d8457175a62da8a225bc08bcbb051c240eddc610ca8e1ddfe7f6d758d2e09517030afad689b6805fc2b8b801a1f182c04369191a30d

    • SSDEEP

      3072:eafjdfYraZJXENc8uCXJiXK1K2LEpzUCV+PaIh9bwdANblLNBNKRrxbU+cmH:eafjqQ15OCyLLkCVkxbDco

    Score
    10/10
    tofseeevasionpersistencetrojan

    • Tofsee

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

      trojantofsee

    • 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 v13

Initial Access

Execution

Persistence

Create or Modify System Process

2
T1543

Windows Service

2
T1543.003

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Privilege Escalation

Create or Modify System Process

2
T1543

Windows Service

2
T1543.003

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Defense Evasion

Impair Defenses

1
T1562

Disable or Modify System Firewall

1
T1562.004

Modify Registry

1
T1112

Credential Access

Discovery

Query Registry

1
T1012

System Information Discovery

2
T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Tasks