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-kz22psfc8s

  • MD5

    38e3f0f985ad66154c83f39a43c7b499

  • SHA1

    c2082df23b60440e5e5661feab6001183c79c299

  • SHA256

    12c8a5d0074b51c3d799ef722a7d97e7e1490529064759ef5932e0e76f28bf7e

  • SHA512

    c955c141ca47679985da8cce632d0bcc6572956d5a19918061afc64067acda98f180385837c302e0e76e0386a06db085175131ee52569a3fb324becf795a19ce

  • SSDEEP

    6144:G3gLadmInlyjX3m3iCww4ek4NYpIlIwassuYQuRjMgU:Gw2dHcjX3m3iC9SEYpIlHaBpdRQg

Score
10/10
tofseeevasionpersistencetrojan

Malware Config

Extracted

Family

tofsee

C2

svartalfheim.top

jotunheim.name

Targets

    • Target

      file.exe

    • Size

      350KB

    • MD5

      38e3f0f985ad66154c83f39a43c7b499

    • SHA1

      c2082df23b60440e5e5661feab6001183c79c299

    • SHA256

      12c8a5d0074b51c3d799ef722a7d97e7e1490529064759ef5932e0e76f28bf7e

    • SHA512

      c955c141ca47679985da8cce632d0bcc6572956d5a19918061afc64067acda98f180385837c302e0e76e0386a06db085175131ee52569a3fb324becf795a19ce

    • SSDEEP

      6144:G3gLadmInlyjX3m3iCww4ek4NYpIlIwassuYQuRjMgU:Gw2dHcjX3m3iC9SEYpIlHaBpdRQg

    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