Overview

overview

10

Static

static

3

file.exe

windows7-x64

10

file.exe

windows10-2004-x64

10

Sharing

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General

  • Target

    file.exe

  • Size

    275KB

  • Sample

    230528-awrrfsdf32

  • MD5

    2f77f1e54c07ab0c6de596e5d2f2752a

  • SHA1

    bca1fb0b3c0dc75674e2e890b158f4d190779517

  • SHA256

    6cbb3fe987652c86b25b99d155e18d4880bc4d542b7d1007f1f3dc85342d8403

  • SHA512

    f9135d7359849780ff5b0a188c97e2a1322e44755a9e166d39a06771a848429f308b77a76fb8b616fc0458ed7ae74d263d87fcac2b45cb17a7ad9ae905ef6129

  • SSDEEP

    3072:f/qKydBOTQx6OiPuloRN4vAHHMoPd5gG+/GvA26/:3qKy6Qx6BPueRN4oMnGCz

Score
10/10
tofseexmrigevasionminerpersistencetrojan

Malware Config

Extracted

Family

tofsee

C2

vanaheim.cn

jotunheim.name

Targets

    • Target

      file.exe

    • Size

      275KB

    • MD5

      2f77f1e54c07ab0c6de596e5d2f2752a

    • SHA1

      bca1fb0b3c0dc75674e2e890b158f4d190779517

    • SHA256

      6cbb3fe987652c86b25b99d155e18d4880bc4d542b7d1007f1f3dc85342d8403

    • SHA512

      f9135d7359849780ff5b0a188c97e2a1322e44755a9e166d39a06771a848429f308b77a76fb8b616fc0458ed7ae74d263d87fcac2b45cb17a7ad9ae905ef6129

    • SSDEEP

      3072:f/qKydBOTQx6OiPuloRN4vAHHMoPd5gG+/GvA26/:3qKy6Qx6BPueRN4oMnGCz

    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