Overview

overview

10

Static

static

3

cryptolaemus

windows10-2004-x64

10

cryptolaemus

windows11-21h2-x64

10

Sharing

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General

  • Target

    29cef4e0835033264d7f7586a28c3da722242e9c6ff709e61a6a58e2069e2b09

  • Size

    423KB

  • Sample

    240903-3vs74szhnk

  • MD5

    784de694eb6b797aada95c4b52092889

  • SHA1

    3d80cfb816ef8605e25662306c0b4300d154afe6

  • SHA256

    29cef4e0835033264d7f7586a28c3da722242e9c6ff709e61a6a58e2069e2b09

  • SHA512

    aa3fd40f2e7d58caff7b28580558099ff3b6c43ffdf4758060c6468db9e2636dc0f84367d511f2d11787ee3fd50b86ecc093d285bba090b90403d95b6d70ca3a

  • SSDEEP

    6144:C5ZXcDLKsQlfxg4QPM9ZQAuI4TCrMTU6bGSKwtX:CnXcDLDQusZX34lrlt

Score
10/10
tofseediscoveryevasionexecutionpersistenceprivilege_escalationtrojan

Malware Config

Extracted

Family

tofsee

C2

vanaheim.cn

jotunheim.name

Targets

    • Target

      29cef4e0835033264d7f7586a28c3da722242e9c6ff709e61a6a58e2069e2b09

    • Size

      423KB

    • MD5

      784de694eb6b797aada95c4b52092889

    • SHA1

      3d80cfb816ef8605e25662306c0b4300d154afe6

    • SHA256

      29cef4e0835033264d7f7586a28c3da722242e9c6ff709e61a6a58e2069e2b09

    • SHA512

      aa3fd40f2e7d58caff7b28580558099ff3b6c43ffdf4758060c6468db9e2636dc0f84367d511f2d11787ee3fd50b86ecc093d285bba090b90403d95b6d70ca3a

    • SSDEEP

      6144:C5ZXcDLKsQlfxg4QPM9ZQAuI4TCrMTU6bGSKwtX:CnXcDLDQusZX34lrlt

    Score
    10/10
    tofseediscoveryevasionexecutionpersistenceprivilege_escalationtrojan

    • Tofsee

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

      trojantofsee

    • 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

1
T1562

Disable or Modify System Firewall

1
T1562.004

Modify Registry

1
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