Overview

overview

10

Static

static

1

file.exe

windows7-x64

10

file.exe

windows10-2004-x64

10

Sharing

Copy URL
Twitter E-mail

General

  • Target

    file

  • Size

    351KB

  • Sample

    230416-1xcxssdh4t

  • MD5

    ef79d6bacf2589c7826c45c2c759ef97

  • SHA1

    8568e58f607d82e955575bca5fe9c5a81e95affa

  • SHA256

    544dea0e331e8457342d189dd590f1b87413239d33f428873f9d5787cd28add6

  • SHA512

    afe0c8c9bc9ed00cceb6bbef8fbd5ba1a9433ffed43f9779220641cb654b2c93d9b08e4cbaf8bdfb48a58a74f3233c8d98cb4ad173baaf578e64670fde6564fb

  • SSDEEP

    6144:NHA+7C2MsWeqBLTKhC8jsofrVd8qgy8Iak82:NHl7FMfeqBL18XTVqpy

Score
10/10
tofseexmrigevasionminerpersistencetrojan

Malware Config

Extracted

Family

tofsee

C2

vanaheim.cn

jotunheim.name

Targets

    • Target

      file

    • Size

      351KB

    • MD5

      ef79d6bacf2589c7826c45c2c759ef97

    • SHA1

      8568e58f607d82e955575bca5fe9c5a81e95affa

    • SHA256

      544dea0e331e8457342d189dd590f1b87413239d33f428873f9d5787cd28add6

    • SHA512

      afe0c8c9bc9ed00cceb6bbef8fbd5ba1a9433ffed43f9779220641cb654b2c93d9b08e4cbaf8bdfb48a58a74f3233c8d98cb4ad173baaf578e64670fde6564fb

    • SSDEEP

      6144:NHA+7C2MsWeqBLTKhC8jsofrVd8qgy8Iak82:NHl7FMfeqBL18XTVqpy

    Score
    10/10
    tofseexmrigevasionminerpersistencetrojan

    • Tofsee

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

      trojantofsee

    • Windows security bypass

      evasiontrojan

    • xmrig

      XMRig is a high performance, open source, cross platform CPU/GPU miner.

      minerxmrig

    • XMRig Miner payload

      miner

    • 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