Overview

overview

10

Static

static

3

f37f32eb1c...83.exe

windows7-x64

10

f37f32eb1c...83.exe

windows10-2004-x64

10

Sharing

Copy URL
Twitter E-mail

General

  • Target

    f37f32eb1c859541773f55297fb1e05bbfc2874851fc7bbd4e185d3a6a1b6583.exe

  • Size

    229KB

  • Sample

    240707-bpvefasbkf

  • MD5

    b40b6b9bd2f7d17a65c72469ee2e2cfa

  • SHA1

    859ffdfda568b34e1c3ded9f846dea6e8774f5b5

  • SHA256

    f37f32eb1c859541773f55297fb1e05bbfc2874851fc7bbd4e185d3a6a1b6583

  • SHA512

    7a4b7171000f8dad0eed766e212ee6c9ebf6431175291442524383232f5455f6bc3e8b224c31dc8bf48ad0cba4ef7637edd4dcc8f32e48f93fb9ea7036adeae1

  • SSDEEP

    3072:DI/quXXuYu/IdYKV97eRuWYxYBouZdSzBS7sy4iIb:DYqKXzEIzSbYxYTAS7W

Score
10/10
tofseeevasionexecutionpersistenceprivilege_escalationtrojan

Malware Config

Extracted

Family

tofsee

C2

vanaheim.cn

jotunheim.name

Targets

    • Target

      f37f32eb1c859541773f55297fb1e05bbfc2874851fc7bbd4e185d3a6a1b6583.exe

    • Size

      229KB

    • MD5

      b40b6b9bd2f7d17a65c72469ee2e2cfa

    • SHA1

      859ffdfda568b34e1c3ded9f846dea6e8774f5b5

    • SHA256

      f37f32eb1c859541773f55297fb1e05bbfc2874851fc7bbd4e185d3a6a1b6583

    • SHA512

      7a4b7171000f8dad0eed766e212ee6c9ebf6431175291442524383232f5455f6bc3e8b224c31dc8bf48ad0cba4ef7637edd4dcc8f32e48f93fb9ea7036adeae1

    • SSDEEP

      3072:DI/quXXuYu/IdYKV97eRuWYxYBouZdSzBS7sy4iIb:DYqKXzEIzSbYxYTAS7W

    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