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

    285KB

  • Sample

    230513-ksqp4afh47

  • MD5

    a21e695f7a2af53e5208781c8a75da08

  • SHA1

    ad5000552a0b6dd28c8909287477ea9834b5ef48

  • SHA256

    f61b790784033096fb5f18ac2c17fa89b99a8ecebdd0e30148fe10133d42e8c0

  • SHA512

    875e52bd6bf5d15472adbf9a9a97f73c2af33e4629c54a43e3de4da41cad638ae27c55275725d3fc9400d690c3f4060161e52c928cdcc0b52be7838d8b952f59

  • SSDEEP

    6144:i2W+rLe/H5vsW/n/8d2f3f0nxcVoR9tw:i23y/Z0u/pf3Axc+hw

Score
10/10
tofseexmrigevasionminerpersistencetrojan

Malware Config

Extracted

Family

tofsee

C2

vanaheim.cn

jotunheim.name

Targets

    • Target

      file.exe

    • Size

      285KB

    • MD5

      a21e695f7a2af53e5208781c8a75da08

    • SHA1

      ad5000552a0b6dd28c8909287477ea9834b5ef48

    • SHA256

      f61b790784033096fb5f18ac2c17fa89b99a8ecebdd0e30148fe10133d42e8c0

    • SHA512

      875e52bd6bf5d15472adbf9a9a97f73c2af33e4629c54a43e3de4da41cad638ae27c55275725d3fc9400d690c3f4060161e52c928cdcc0b52be7838d8b952f59

    • SSDEEP

      6144:i2W+rLe/H5vsW/n/8d2f3f0nxcVoR9tw:i23y/Z0u/pf3Axc+hw

    Score
    10/10
    tofseeevasionpersistencetrojanxmrigminer

    • 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