Overview

overview

10

Static

static

1

file.exe

windows7-x64

10

file.exe

windows10-2004-x64

10

Sharing

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General

  • Target

    file.exe

  • Size

    299KB

  • Sample

    230206-2fx23sbd9w

  • MD5

    f4d9f3f1009be26ad902f44ac9082c4e

  • SHA1

    9814e5e8e6ce762b7e0544f8f44d1eddd9658415

  • SHA256

    15188d63048c1646ce4b4070eb5ff19ed65e9e63af1c884e3b314d5536bb695a

  • SHA512

    c09ec10ea165108655f52c1e001d37777c66ff205cd8936c79f5991e838ec29cc76d0ad8c7b7c129ef3fa41007559c3869d7483f5ae3fbb52d0ffe60a95208c6

  • SSDEEP

    6144:COUmLTe6RYq4N306/C/ryGOhXDuQj96oah:CBmvjYjNda2GOhXDljD

Score
10/10
tofseeevasionpersistencetrojan

Malware Config

Extracted

Family

tofsee

C2

svartalfheim.top

jotunheim.name

Targets

    • Target

      file.exe

    • Size

      299KB

    • MD5

      f4d9f3f1009be26ad902f44ac9082c4e

    • SHA1

      9814e5e8e6ce762b7e0544f8f44d1eddd9658415

    • SHA256

      15188d63048c1646ce4b4070eb5ff19ed65e9e63af1c884e3b314d5536bb695a

    • SHA512

      c09ec10ea165108655f52c1e001d37777c66ff205cd8936c79f5991e838ec29cc76d0ad8c7b7c129ef3fa41007559c3869d7483f5ae3fbb52d0ffe60a95208c6

    • SSDEEP

      6144:COUmLTe6RYq4N306/C/ryGOhXDuQj96oah:CBmvjYjNda2GOhXDljD

    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

    • 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