Overview

overview

10

Static

static

3

26cf1fb604...24.exe

windows7-x64

10

26cf1fb604...24.exe

windows10-2004-x64

10

Sharing

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General

  • Target

    3cc245e2aff9ab7358a8ccb16366c712d6ec168518526630c9b0f541eb376f36

  • Size

    138KB

  • Sample

    240417-qtwkmahf93

  • MD5

    511c71dbd1bf851a947c2090303365f1

  • SHA1

    2043596ead497eabd324702764e1ed4e4206460f

  • SHA256

    3cc245e2aff9ab7358a8ccb16366c712d6ec168518526630c9b0f541eb376f36

  • SHA512

    919109ae0d1267fa56b0aef35924fa2dec11a2da95e731dd884d17f0a67b78932705247af95af8b94ce74ad41b10259a327b7560685067d5019fc0e63d524020

  • SSDEEP

    3072:4sJH6NSePAaJskBVUo+R84UBy9ctp6hojZh66JGU4vVdSZUiE:4sZ6NSePAWrY+By9ctpEo91GlvVsuiE

Score
10/10
tofseeevasionpersistencetrojan

Malware Config

Extracted

Family

tofsee

C2

vanaheim.cn

jotunheim.name

Targets

    • Target

      26cf1fb6045f798cb624956dd361b97ea3dff8b950911008dfb5522df4059924.exe

    • Size

      221KB

    • MD5

      bb0693796c43e3b4954321a201c124a7

    • SHA1

      5066abedd5fd1aebc207a056b1a2af7d7999d583

    • SHA256

      26cf1fb6045f798cb624956dd361b97ea3dff8b950911008dfb5522df4059924

    • SHA512

      1e9a673951f26c1e081d3698145343056d81cd42c229feafd904f7cbc09096da8bb751de8263e0dd9e7482d162481ea7e723239d11a23f03547f1acf8d0d2b37

    • SSDEEP

      3072:EwJsPvd045hJkKkuW0MwA05h4TAQ2Jcx/MLm1nHvBQVy/eLWc8:gu45TkT0G2SLHvsae

    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 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

2
T1562

Disable or Modify Tools

1
T1562.001

Disable or Modify System Firewall

1
T1562.004

Modify Registry

2
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