Overview

overview

10

Static

static

1

file.exe

windows7-x64

10

file.exe

windows10-2004-x64

10

Sharing

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General

  • Target

    file.exe

  • Size

    351KB

  • Sample

    230417-c5v7cacg74

  • MD5

    5d2d9772ede423e38610247a6b1ceaef

  • SHA1

    05a7d5e88b7d76c3bac82863e0ecdeee3c7062b8

  • SHA256

    354b9ec827fa56fd50c0193ae8a49cd5de791012a94603efde7322a79a1e4173

  • SHA512

    5aa2741e5ecd9f287274e7011dde190c30a7037fca69e1094a550a82fadb9ceac9728eb7ac9d47431aeb7cd0b56eacdc5ef8b39dcd451352169b1a346709c64a

  • SSDEEP

    6144:BdBva6fLfwWbJQtkLzq7rPjmAdFAZb4N2:Bd9/DfwWbJ9LqP6AdF4

Score
10/10
tofseexmrigevasionminerpersistencetrojan

Malware Config

Extracted

Family

tofsee

C2

vanaheim.cn

jotunheim.name

Targets

    • Target

      file.exe

    • Size

      351KB

    • MD5

      5d2d9772ede423e38610247a6b1ceaef

    • SHA1

      05a7d5e88b7d76c3bac82863e0ecdeee3c7062b8

    • SHA256

      354b9ec827fa56fd50c0193ae8a49cd5de791012a94603efde7322a79a1e4173

    • SHA512

      5aa2741e5ecd9f287274e7011dde190c30a7037fca69e1094a550a82fadb9ceac9728eb7ac9d47431aeb7cd0b56eacdc5ef8b39dcd451352169b1a346709c64a

    • SSDEEP

      6144:BdBva6fLfwWbJQtkLzq7rPjmAdFAZb4N2:Bd9/DfwWbJ9LqP6AdF4

    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