Overview

overview

10

Static

static

3

a5f35b4f89...68.exe

windows7-x64

10

a5f35b4f89...68.exe

windows10-2004-x64

10

Sharing

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General

  • Target

    a5f35b4f8933e0106c7743eaadbd3b883f61552add7ff17aca237450b3aa4168.exe

  • Size

    268KB

  • Sample

    240727-b8kdkssclc

  • MD5

    6c2830c79d0a840f479ad635e3d57883

  • SHA1

    dc4073381a79705a4df53048cad7b44679623835

  • SHA256

    a5f35b4f8933e0106c7743eaadbd3b883f61552add7ff17aca237450b3aa4168

  • SHA512

    0a17899c829495dddf3d08a832c7e2b4747ab9665089a9d6b8d5bb625e4851e885800cb242241740853f9e5ad30449f710edd231865c49d464a7aa3084aedc91

  • SSDEEP

    3072:66kSFokrBF+7cvxpl1oZkNYe/v4IMbGhULweRQvybL2RxTTu:jzfrK+Dl1ou2HtmaLgxTT

Score
10/10
tofseediscoveryevasionexecutionpersistenceprivilege_escalationtrojan

Malware Config

Extracted

Family

tofsee

C2

vanaheim.cn

jotunheim.name

Targets

    • Target

      a5f35b4f8933e0106c7743eaadbd3b883f61552add7ff17aca237450b3aa4168.exe

    • Size

      268KB

    • MD5

      6c2830c79d0a840f479ad635e3d57883

    • SHA1

      dc4073381a79705a4df53048cad7b44679623835

    • SHA256

      a5f35b4f8933e0106c7743eaadbd3b883f61552add7ff17aca237450b3aa4168

    • SHA512

      0a17899c829495dddf3d08a832c7e2b4747ab9665089a9d6b8d5bb625e4851e885800cb242241740853f9e5ad30449f710edd231865c49d464a7aa3084aedc91

    • SSDEEP

      3072:66kSFokrBF+7cvxpl1oZkNYe/v4IMbGhULweRQvybL2RxTTu:jzfrK+Dl1ou2HtmaLgxTT

    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

    • 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 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