Overview

overview

10

Static

static

10

77ac2b9604...2N.exe

windows7-x64

10

77ac2b9604...2N.exe

windows10-2004-x64

10

Sharing

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General

  • Target

    77ac2b9604d89716061ef9874c44de4772172378b46d63886db0f55800feeb32N.exe

  • Size

    71KB

  • Sample

    240925-s65eeatcql

  • MD5

    5998ae6f6db418940a38ed466256e490

  • SHA1

    e37a169800217c49f3cb40d07e7caaedb4a6996f

  • SHA256

    77ac2b9604d89716061ef9874c44de4772172378b46d63886db0f55800feeb32

  • SHA512

    09faa0a92cacc3154620e85099ff3bd8f4765786a6346a1d9ee9af8ab75e18e4c12d2ac739c2419d541abfbe50f2c01c6a6c56f4d54bf0d9b9b0b4967ed73c07

  • SSDEEP

    1536:Dkes21VCy1nTxSYg3CXTjFWL9idpIHUc:DDVCyFxSYACXF7pI0

Score
10/10
tofseediscoveryevasionexecutionpersistenceprivilege_escalationtrojan

Malware Config

Extracted

Family

tofsee

C2

vanaheim.cn

jotunheim.name

Targets

    • Target

      77ac2b9604d89716061ef9874c44de4772172378b46d63886db0f55800feeb32N.exe

    • Size

      71KB

    • MD5

      5998ae6f6db418940a38ed466256e490

    • SHA1

      e37a169800217c49f3cb40d07e7caaedb4a6996f

    • SHA256

      77ac2b9604d89716061ef9874c44de4772172378b46d63886db0f55800feeb32

    • SHA512

      09faa0a92cacc3154620e85099ff3bd8f4765786a6346a1d9ee9af8ab75e18e4c12d2ac739c2419d541abfbe50f2c01c6a6c56f4d54bf0d9b9b0b4967ed73c07

    • SSDEEP

      1536:Dkes21VCy1nTxSYg3CXTjFWL9idpIHUc:DDVCyFxSYACXF7pI0

    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