tofsee | 86aa4ff27e06217513d3cb541fdd846f69f67ed3ea086443ae523972c1bff322 | Triage

Sharing

General

Target

86aa4ff27e06217513d3cb541fdd846f69f67ed3ea086443ae523972c1bff322
Size

127KB
Sample

240417-r7k7gsch43
MD5

e99dfb612a2d7b7b2e61ae548f64cf74
SHA1

6cd1f36a10aba700e91609cb18310805562a3743
SHA256

86aa4ff27e06217513d3cb541fdd846f69f67ed3ea086443ae523972c1bff322
SHA512

2f548474152f3e3099d60df513df9fedd906a5d6ccde373b674258583d1e580261f30cd8bda5fef84876cfee837e551c6c345fea42a87ee48d18d73f0ce47469
SSDEEP

3072:k/RttygJutnfKxAfcKZiG5KnjIzYWhb2TqGsL23gwGVC:wRtjckAkI28zYWhiuGO2wu

Score

10^/10

tofsee evasion persistence trojan

Malware Config

Extracted

Family

tofsee

C2

vanaheim.cn

jotunheim.name

Targets

- Target
  
  3555ecd8bb270312994e03bf64695a3f1c0213a2abf85b890ebe2bb40a9648a3.exe
- Size
  
  203KB
- MD5
  
  e80ed6ccb333b7fc33ffc98bca43b57d
- SHA1
  
  170281a608fe94eee06a9f45466f6a47bd2272e3
- SHA256
  
  3555ecd8bb270312994e03bf64695a3f1c0213a2abf85b890ebe2bb40a9648a3
- SHA512
  
  3209c004cebb1e2f544f7d8457175a62da8a225bc08bcbb051c240eddc610ca8e1ddfe7f6d758d2e09517030afad689b6805fc2b8b801a1f182c04369191a30d
- SSDEEP
  
  3072:eafjdfYraZJXENc8uCXJiXK1K2LEpzUCV+PaIh9bwdANblLNBNKRrxbU+cmH:eafjqQ15OCyLLkCVkxbDco
Score

10^/10

tofsee evasion persistence trojan
- Tofsee
  Backdoor/botnet which carries out malicious activities based on commands from a C2 server.
  trojan tofsee
- Windows security bypass
  evasion trojan
- Creates new service(s)
  persistence
- 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
behavioral1 behavioral2

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

Registry Run Keys / Startup Folder

Create or Modify System Process

Windows Service

Privilege Escalation

Boot or Logon Autostart Execution

Registry Run Keys / Startup Folder

Create or Modify System Process

Windows Service

Defense Evasion

Impair Defenses

Disable or Modify System Firewall

Disable or Modify Tools

Modify Registry

Credential Access

Discovery

Query Registry

System Information Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Tasks

static1

behavioral1

tofseeevasionpersistencetrojan

behavioral2

tofseeevasionpersistencetrojan