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

    146KB

  • Sample

    221126-krldzsad2v

  • MD5

    1fd5ff320a44cfc6d33a505c24efa590

  • SHA1

    6db5b5667f7861e163344f95ec9f0f3616d14130

  • SHA256

    662a375950d1b16ceb51ea7d50fbaa9121f087d7d148d3be65705a2c4b8b3d08

  • SHA512

    83177f1f72249deaca68249ee5b2f4b755dd0481fb7b24c55f3f28183d5b54edf40f4e330bb00156210eea1f6d73414474df4f3b5b8b69cb14150d058983c29d

  • SSDEEP

    3072:/EBurucqyxil650IRnGOamWe3BYL7aoBUSl3X:cVcqd6Bg7aj+n

Score
10/10
tofseeevasionpersistencetrojan

Malware Config

Extracted

Family

tofsee

C2

svartalfheim.top

jotunheim.name

Targets

    • Target

      file.exe

    • Size

      146KB

    • MD5

      1fd5ff320a44cfc6d33a505c24efa590

    • SHA1

      6db5b5667f7861e163344f95ec9f0f3616d14130

    • SHA256

      662a375950d1b16ceb51ea7d50fbaa9121f087d7d148d3be65705a2c4b8b3d08

    • SHA512

      83177f1f72249deaca68249ee5b2f4b755dd0481fb7b24c55f3f28183d5b54edf40f4e330bb00156210eea1f6d73414474df4f3b5b8b69cb14150d058983c29d

    • SSDEEP

      3072:/EBurucqyxil650IRnGOamWe3BYL7aoBUSl3X:cVcqd6Bg7aj+n

    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