Overview

overview

10

Static

static

3

f00b178290...05.exe

windows7-x64

10

f00b178290...05.exe

windows10-2004-x64

10

Sharing

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General

  • Target

    f00b17829026124838d62c5d1f920a720476547d5e8309c5027614d29a416e05

  • Size

    10.5MB

  • Sample

    240510-f1dnaadc2z

  • MD5

    400992e89f640ced83313c8d0cec106e

  • SHA1

    abcc1616d181034b37b6e2aee2b274a4b241ed7f

  • SHA256

    f00b17829026124838d62c5d1f920a720476547d5e8309c5027614d29a416e05

  • SHA512

    8ef86fc13c10e0867111159265d0f6e3a011e35aa07b51aa94b6a52bf80272fff5a0339e3dea13e9c87a0c3f319d87014326256372dfb27bd2c74d58d7e42e15

  • SSDEEP

    12288:xucqxGrf50Fqwswswswswswswswswswswswswswswswswswswswswswswswswswv:xuM6F

Score
10/10
tofseeevasionexecutionpersistencetrojan

Malware Config

Extracted

Family

tofsee

C2

vanaheim.cn

jotunheim.name

Targets

    • Target

      f00b17829026124838d62c5d1f920a720476547d5e8309c5027614d29a416e05

    • Size

      10.5MB

    • MD5

      400992e89f640ced83313c8d0cec106e

    • SHA1

      abcc1616d181034b37b6e2aee2b274a4b241ed7f

    • SHA256

      f00b17829026124838d62c5d1f920a720476547d5e8309c5027614d29a416e05

    • SHA512

      8ef86fc13c10e0867111159265d0f6e3a011e35aa07b51aa94b6a52bf80272fff5a0339e3dea13e9c87a0c3f319d87014326256372dfb27bd2c74d58d7e42e15

    • SSDEEP

      12288:xucqxGrf50Fqwswswswswswswswswswswswswswswswswswswswswswswswswswv:xuM6F

    Score
    10/10
    tofseeevasionexecutionpersistencetrojan

    • Tofsee

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

      trojantofsee

    • Windows security bypass

      evasiontrojan

    • Creates new service(s)

      persistenceexecution

    • 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

    • Looks up external IP address via web service

      Uses a legitimate IP lookup service to find the infected system's external IP.

    • Drops file in System32 directory

    • Suspicious use of SetThreadContext

    behavioral1behavioral2

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

System Services

1
T1569

Service Execution

1
T1569.002

Persistence

Create or Modify System Process

2
T1543

Windows Service

2
T1543.003

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Privilege Escalation

Create or Modify System Process

2
T1543

Windows Service

2
T1543.003

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Defense Evasion

Impair Defenses

2
T1562

Disable or Modify Tools

1
T1562.001

Disable or Modify System Firewall

1
T1562.004

Modify Registry

2
T1112

Credential Access

Discovery

Query Registry

1
T1012

System Information Discovery

2
T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Tasks