Overview

overview

10

Static

static

3

3eebf917ef...63.exe

windows7-x64

10

3eebf917ef...63.exe

windows10-2004-x64

10

Sharing

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General

  • Target

    3eebf917efa82ea7b81f37e9f8c98a702254c5f0a487667a72e78d53a61ce363.exe

  • Size

    397KB

  • Sample

    240924-bm536avhpg

  • MD5

    f403202fb853377ceb67200005ef95b8

  • SHA1

    1840e1495486209e92e5230cf1406f31a02699e7

  • SHA256

    3eebf917efa82ea7b81f37e9f8c98a702254c5f0a487667a72e78d53a61ce363

  • SHA512

    13b130d6f2ac8be444e16d4b1116812179d5043912a7aa24bd0d566eeecf4447be09fd54266dc12ff1902569d048c93a2d0c827abc135b0159f8156c18f9bf7a

  • SSDEEP

    6144:7BYOcLH6/xNtFxaS3DpwmEIey0bGWEbje2bkln5eOy8:76Ocb6/r/xv2GWaeaklQT8

Score
10/10
tofseediscoveryevasionexecutionpersistenceprivilege_escalationtrojan

Malware Config

Extracted

Family

tofsee

C2

vanaheim.cn

jotunheim.name

Targets

    • Target

      3eebf917efa82ea7b81f37e9f8c98a702254c5f0a487667a72e78d53a61ce363.exe

    • Size

      397KB

    • MD5

      f403202fb853377ceb67200005ef95b8

    • SHA1

      1840e1495486209e92e5230cf1406f31a02699e7

    • SHA256

      3eebf917efa82ea7b81f37e9f8c98a702254c5f0a487667a72e78d53a61ce363

    • SHA512

      13b130d6f2ac8be444e16d4b1116812179d5043912a7aa24bd0d566eeecf4447be09fd54266dc12ff1902569d048c93a2d0c827abc135b0159f8156c18f9bf7a

    • SSDEEP

      6144:7BYOcLH6/xNtFxaS3DpwmEIey0bGWEbje2bkln5eOy8:76Ocb6/r/xv2GWaeaklQT8

    Score
    10/10
    tofseediscoveryevasionexecutionpersistenceprivilege_escalationtrojan

    • 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

    • Drops file in System32 directory

    • Suspicious use of SetThreadContext

    behavioral1behavioral2

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

System Services

1
T1569

Service Execution

1
T1569.002

Persistence

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Create or Modify System Process

2
T1543

Windows Service

2
T1543.003

Event Triggered Execution

1
T1546

Netsh Helper DLL

1
T1546.007

Privilege Escalation

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Create or Modify System Process

2
T1543

Windows Service

2
T1543.003

Event Triggered Execution

1
T1546

Netsh Helper DLL

1
T1546.007

Defense Evasion

Impair Defenses

2
T1562

Disable or Modify System Firewall

1
T1562.004

Disable or Modify Tools

1
T1562.001

Modify Registry

2
T1112

Credential Access

Discovery

Query Registry

1
T1012

System Information Discovery

2
T1082

System Location Discovery

1
T1614

System Language Discovery

1
T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Tasks