Overview

overview

10

Static

static

file.exe

windows7-x64

10

file.exe

windows10-2004-x64

10

Sharing

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General

  • Target

    file.exe

  • Size

    192KB

  • Sample

    221201-tzaf5abb8w

  • MD5

    3894a58334e66e157e9d18c39bd68f9e

  • SHA1

    ebdc8d605f155c8ceb7cc1f28e8463188ef8eae7

  • SHA256

    7f2449827262abc18421245fb8d65b7eee8dd441baf44742266d9d7633cc079e

  • SHA512

    0375a5330b9808b09cc68e70d3479a241f50e4f56a60c83730dff5fe4b0ee5880d80a3e8b44bd93faccf9fede5d5b961d5972c2e8f502374fed068507f9f0821

  • SSDEEP

    3072:kJ603TxxN3EsBz5/gbVvHI18aC9gH+5paXHDAbEauWa:klV3EsBhgBv9yezvEao

Score
10/10
tofseexmrigevasionminerpersistencetrojan

Malware Config

Extracted

Family

tofsee

C2

svartalfheim.top

jotunheim.name

Targets

    • Target

      file.exe

    • Size

      192KB

    • MD5

      3894a58334e66e157e9d18c39bd68f9e

    • SHA1

      ebdc8d605f155c8ceb7cc1f28e8463188ef8eae7

    • SHA256

      7f2449827262abc18421245fb8d65b7eee8dd441baf44742266d9d7633cc079e

    • SHA512

      0375a5330b9808b09cc68e70d3479a241f50e4f56a60c83730dff5fe4b0ee5880d80a3e8b44bd93faccf9fede5d5b961d5972c2e8f502374fed068507f9f0821

    • SSDEEP

      3072:kJ603TxxN3EsBz5/gbVvHI18aC9gH+5paXHDAbEauWa:klV3EsBhgBv9yezvEao

    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

    • Executes dropped EXE

    • 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

    • 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