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

    350KB

  • Sample

    221202-l7ertaba8s

  • MD5

    e6c5a231ec3235d5020f4af44ee5f2b8

  • SHA1

    ae7aeaf37397c4adf15eb839f3a69b0b64444e9f

  • SHA256

    72ddf1a00d4705c99c0d26668d6af55071dcddeb9c4da47f87e5c69dc1ef3e19

  • SHA512

    367668d17178bb47ab49afdd7d9ff73682cca7872920e587592f739b55805f056b3f93613bff6d359f84f4c0d18c6bc9ac461d30998dce865130ebec50380692

  • SSDEEP

    6144:KHXLG/6QDZw2FGxTKrzXR8+zqrWuRjMgU:K3S/DK2sYzXR8/RQg

Score
10/10
tofseeevasionpersistencetrojan

Malware Config

Extracted

Family

tofsee

C2

svartalfheim.top

jotunheim.name

Targets

    • Target

      file.exe

    • Size

      350KB

    • MD5

      e6c5a231ec3235d5020f4af44ee5f2b8

    • SHA1

      ae7aeaf37397c4adf15eb839f3a69b0b64444e9f

    • SHA256

      72ddf1a00d4705c99c0d26668d6af55071dcddeb9c4da47f87e5c69dc1ef3e19

    • SHA512

      367668d17178bb47ab49afdd7d9ff73682cca7872920e587592f739b55805f056b3f93613bff6d359f84f4c0d18c6bc9ac461d30998dce865130ebec50380692

    • SSDEEP

      6144:KHXLG/6QDZw2FGxTKrzXR8+zqrWuRjMgU:K3S/DK2sYzXR8/RQg

    Score
    10/10
    tofseeevasionpersistencetrojan

    • Tofsee

      Backdoor/botnet which carries out malicious activities based on commands from a C2 server.

      trojantofsee

    • Windows security bypass

      evasiontrojan

    • 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

    • 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