Overview

overview

10

Static

static

3

f6c76564b0...34.exe

windows7-x64

10

f6c76564b0...34.exe

windows10-2004-x64

10

Sharing

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General

  • Target

    653bb56b0d56694921a92ff391a5f43f60e95fe6e34286263023f3ebdd0764b9

  • Size

    133KB

  • Sample

    240417-qs3ybabc2s

  • MD5

    4338f0506ecb6245469b2f8d937ca5b9

  • SHA1

    cf1ccbb459e009fd707d274c49a9e4788a21d080

  • SHA256

    653bb56b0d56694921a92ff391a5f43f60e95fe6e34286263023f3ebdd0764b9

  • SHA512

    225d81b3aafe7ed657af524cf8450751bcf5751fc30b1782c5c288b4563ca3d7f3586de590c403435d01582cb74741b2038087b719711c3952ecbd8b2775f61f

  • SSDEEP

    3072:L+qJY6tcjmhv1WS/JHUSaU0gDOJgThdQhhrBUWtk0BxZ3NN7LzRaismdw:L+EYLjsv4OOUbRVmLTZ9ZLtsz

Score
10/10
tofseeevasionpersistencetrojan

Malware Config

Extracted

Family

tofsee

C2

vanaheim.cn

jotunheim.name

Targets

    • Target

      f6c76564b0268b7c3b754b05e498fcbc7e11fc1907460d12b1d55dd0d0662834.exe

    • Size

      291KB

    • MD5

      66ebc32e8c190f890b24ccdac2e9a428

    • SHA1

      5c3f23e69bfe7dc42c6a25bb670357a18c8455c7

    • SHA256

      f6c76564b0268b7c3b754b05e498fcbc7e11fc1907460d12b1d55dd0d0662834

    • SHA512

      7c7ef99016cd154d649f6fd0de6457d43a3e2e6e52735306c9be7ddaa9eb9f7d0110cfbf839eaf4b56c7c57db92ebe1653abae569a9b3d6f38c83fc2b5b13142

    • SSDEEP

      3072:GDq1IwpTDlRRfAIiLGFJuQIjn5KK8PNUX558:wpwT3RfEJ3sZKA

    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 v13

Initial Access

Execution

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