tofsee | f6609c2b49b1b74f2061c0f367fb90237f417dbd7c412e4142f7103ccefc6965 | Triage

Sharing

General

Target

f6609c2b49b1b74f2061c0f367fb90237f417dbd7c412e4142f7103ccefc6965
Size

127KB
Sample

240417-qvv1gsbd2y
MD5

aa32bf790fc7f05704a932a87ba15a90
SHA1

a93f031087bc97e2f72410890802f893dd96aefb
SHA256

f6609c2b49b1b74f2061c0f367fb90237f417dbd7c412e4142f7103ccefc6965
SHA512

256d0dd55073ca43989494e910a7d23e4bc699df348353e4052c673a86d81a418d623b5aadfceede6f67aeaf1b90f8260f3a94a5119fab9efdd7dc4a5f3a80d0
SSDEEP

3072:+rJUb1Tp1TMNhuYfe+lkxnubxjtyPl5icEtBDBK:yytpAEeqPl5icEw

Score

10^/10

tofsee evasion persistence trojan

Malware Config

Extracted

Family

tofsee

C2

vanaheim.cn

jotunheim.name

Targets

- Target
  
  755b1b45c26d282f094d504074bbdf897f6460968db67dd7d88a4702e03ef7f9.exe
- Size
  
  203KB
- MD5
  
  d88f7c78b3be6c96c33b80a8e1bb85de
- SHA1
  
  ce07fb26b0ec69cdf563f98560aa4f7f298e6e8d
- SHA256
  
  755b1b45c26d282f094d504074bbdf897f6460968db67dd7d88a4702e03ef7f9
- SHA512
  
  1c396a26da383d01ddc317bc4c565c5825b0e452bcf262ac849cd720acb6cb7abcc08e895041e59246dd7686e72424990728745716815a5879bce30769e3e898
- SSDEEP
  
  3072:Ef3B/ALaZdXUNc8iirJiM21K7uSbrF068c0E0rBNWRDxlH+cmH:Ef32clVO598c0EHxQco
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