Overview

overview

10

Static

static

3

c5cd4932ea...03.exe

windows7-x64

10

c5cd4932ea...03.exe

windows10-2004-x64

10

Sharing

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General

  • Target

    c5cd4932ea8f02c3f8af95ab80eb1612329a657b6c1ed35982e3310e4ebd7b03

  • Size

    234KB

  • Sample

    240717-3m2vaavemj

  • MD5

    61867a71161ae87b02413bad06e53446

  • SHA1

    eb375d9b4b9089457e0b480f12d977ceb1655b07

  • SHA256

    c5cd4932ea8f02c3f8af95ab80eb1612329a657b6c1ed35982e3310e4ebd7b03

  • SHA512

    43e7cfb44fd61e9182fddeab13add5cd6e6cb8ce3e5c7a728daecdf2bb6bc3f157c7c1ab666ae3bf5fb191341b5b43f9e3a4a9d98936b9881c4fc3c1b0be30bd

  • SSDEEP

    3072:jYnp0HalR5aEr0AZsLjhR7OcPlnr2YWwtq+BkkWMV:jYnp5G+fZsLjhRSilhzjOc

Score
10/10
tofseeevasionexecutionpersistenceprivilege_escalationtrojan

Malware Config

Extracted

Family

tofsee

C2

vanaheim.cn

jotunheim.name

Targets

    • Target

      c5cd4932ea8f02c3f8af95ab80eb1612329a657b6c1ed35982e3310e4ebd7b03

    • Size

      234KB

    • MD5

      61867a71161ae87b02413bad06e53446

    • SHA1

      eb375d9b4b9089457e0b480f12d977ceb1655b07

    • SHA256

      c5cd4932ea8f02c3f8af95ab80eb1612329a657b6c1ed35982e3310e4ebd7b03

    • SHA512

      43e7cfb44fd61e9182fddeab13add5cd6e6cb8ce3e5c7a728daecdf2bb6bc3f157c7c1ab666ae3bf5fb191341b5b43f9e3a4a9d98936b9881c4fc3c1b0be30bd

    • SSDEEP

      3072:jYnp0HalR5aEr0AZsLjhR7OcPlnr2YWwtq+BkkWMV:jYnp5G+fZsLjhRSilhzjOc

    Score
    10/10
    tofseeevasionexecutionpersistenceprivilege_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

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Tasks