Overview

overview

10

Static

static

3

5df0c9e0e3...ce.exe

windows7-x64

10

5df0c9e0e3...ce.exe

windows10-2004-x64

10

Sharing

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General

  • Target

    5df0c9e0e30e449d746c096a467d5217396a79a877be2081b7876af2a072fece

  • Size

    191KB

  • Sample

    240904-q4dska1drm

  • MD5

    a8343b36fd866f4ec73184a55aebf791

  • SHA1

    9420445ca0f80f0714978bb158c10772a9eb8ec6

  • SHA256

    5df0c9e0e30e449d746c096a467d5217396a79a877be2081b7876af2a072fece

  • SHA512

    9081eb71127efc7dcaf1ba09d0390f71d344533c31c9c259cf495bc7c49c8609c25e4d54612a5becf5267494d035fee5d1e6f7e7a2552bee572f30ac6b4dc515

  • SSDEEP

    3072:7H+lBBpz9/vh9yxrVjljF5xFqeReI7pCpKeJNUWyqpvD3hyNQFFyb1:6Bpz9/vh9yxpBjFzzoK4WWJ9D3IGO

Score
10/10
tofseediscoveryevasionexecutionpersistenceprivilege_escalationtrojan

Malware Config

Extracted

Family

tofsee

C2

vanaheim.cn

jotunheim.name

Targets

    • Target

      5df0c9e0e30e449d746c096a467d5217396a79a877be2081b7876af2a072fece

    • Size

      191KB

    • MD5

      a8343b36fd866f4ec73184a55aebf791

    • SHA1

      9420445ca0f80f0714978bb158c10772a9eb8ec6

    • SHA256

      5df0c9e0e30e449d746c096a467d5217396a79a877be2081b7876af2a072fece

    • SHA512

      9081eb71127efc7dcaf1ba09d0390f71d344533c31c9c259cf495bc7c49c8609c25e4d54612a5becf5267494d035fee5d1e6f7e7a2552bee572f30ac6b4dc515

    • SSDEEP

      3072:7H+lBBpz9/vh9yxrVjljF5xFqeReI7pCpKeJNUWyqpvD3hyNQFFyb1:6Bpz9/vh9yxpBjFzzoK4WWJ9D3IGO

    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