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

    184KB

  • Sample

    230614-fy99gadd2y

  • MD5

    495a1ea939030ecab57ad60549837e0d

  • SHA1

    921ffb10aef3937bef3a160b4d5f405fa4802b13

  • SHA256

    2dd452add7571434898c24c9bdb636627b929b7620a3bcb36c3080b86def4818

  • SHA512

    956dc9e9665fe5c1d9c4ebfcda59d5b8c49546ff3056176ebadad07e54c1c00b57e8b900008bf9903a5798ad5e4933f6c147f7977a97a695f924e792a32c2c35

  • SSDEEP

    3072:QG36z5gnjk/KiYq4UzpoSEgRtyZrPxJKlP:n3egnw/YNE09VL

Score
10/10
tofseexmrigevasionminerpersistencetrojan

Malware Config

Extracted

Family

tofsee

C2

vanaheim.cn

jotunheim.name

Targets

    • Target

      file.exe

    • Size

      184KB

    • MD5

      495a1ea939030ecab57ad60549837e0d

    • SHA1

      921ffb10aef3937bef3a160b4d5f405fa4802b13

    • SHA256

      2dd452add7571434898c24c9bdb636627b929b7620a3bcb36c3080b86def4818

    • SHA512

      956dc9e9665fe5c1d9c4ebfcda59d5b8c49546ff3056176ebadad07e54c1c00b57e8b900008bf9903a5798ad5e4933f6c147f7977a97a695f924e792a32c2c35

    • SSDEEP

      3072:QG36z5gnjk/KiYq4UzpoSEgRtyZrPxJKlP:n3egnw/YNE09VL

    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