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

    321KB

  • Sample

    230512-nsaknach62

  • MD5

    bc7c2a8a4a55d3d8091b57b050721465

  • SHA1

    585d80c0eca34a12f2ac79e6e6d1c97c1bf6ab62

  • SHA256

    664804be369abbc16ab815f94b340fda7c9bfe43372d706c85ead10d609725ba

  • SHA512

    b2dbd260ce0577db7e15f19f44373910678f885745eb54a288788b384a799d0d72dd533f1d7c28da846b12170600dd6cff943b541e9bd8b5c119103c5cf97eb5

  • SSDEEP

    3072:4QZggfPJhkK5MZo43bw+2WMWYNRb/a+dK6TZHVuNCLPEqDYCYy5/9Q4kp7t:4APIXoWkWMWYNU+RTzHPEqDYDj

Score
10/10
tofseexmrigevasionminerpersistencetrojan

Malware Config

Extracted

Family

tofsee

C2

vanaheim.cn

jotunheim.name

Targets

    • Target

      file.exe

    • Size

      321KB

    • MD5

      bc7c2a8a4a55d3d8091b57b050721465

    • SHA1

      585d80c0eca34a12f2ac79e6e6d1c97c1bf6ab62

    • SHA256

      664804be369abbc16ab815f94b340fda7c9bfe43372d706c85ead10d609725ba

    • SHA512

      b2dbd260ce0577db7e15f19f44373910678f885745eb54a288788b384a799d0d72dd533f1d7c28da846b12170600dd6cff943b541e9bd8b5c119103c5cf97eb5

    • SSDEEP

      3072:4QZggfPJhkK5MZo43bw+2WMWYNRb/a+dK6TZHVuNCLPEqDYCYy5/9Q4kp7t:4APIXoWkWMWYNU+RTzHPEqDYDj

    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