tofsee | ab55372f5a55b9ce8010fdeafed574d0db6117761d7d1f5bdf881511228028b1 | Triage

Sharing

General

Target

ab55372f5a55b9ce8010fdeafed574d0db6117761d7d1f5bdf881511228028b1
Size

128KB
Sample

240417-qvj8zshg54
MD5

5980c5f673c77d1c7d9c3b6612c61849
SHA1

971b49ebff67dba92f46f40afaaa98036cf8cadc
SHA256

ab55372f5a55b9ce8010fdeafed574d0db6117761d7d1f5bdf881511228028b1
SHA512

5e400ac026ad46af6c8beb12dfcc1cdb7e6eef6bfc0ecc848efa131d62c291d52bb9ee916aa6c8d705f9cc09f90507a396b924b397f2840ac91d3594532379d9
SSDEEP

3072:EDcUmGyG6S+Vdk4M4hFcBRL/U87fNdm1Puj9Tn37:E3mG/ccfLc2dm1Puj9Tn37

Score

10^/10

tofsee evasion persistence trojan

Malware Config

Extracted

Family

tofsee

C2

vanaheim.cn

jotunheim.name

Targets

- Target
  
  8240e21305559cabc41ccf60e6683e8fb3f6ae80a20e289e687366ccc4594c40.exe
- Size
  
  203KB
- MD5
  
  6b7204c0cb219b7d01999025ccd85fdc
- SHA1
  
  1f57fbfdcf6d71d0d5a36602e1e83bc9dee3ac7a
- SHA256
  
  8240e21305559cabc41ccf60e6683e8fb3f6ae80a20e289e687366ccc4594c40
- SHA512
  
  68a19f84eb4d73394a2bb2b7629f9582e91b54713b19e71722ba5359636ce36d9aa9951af7b729d65752a7aff916ee91abd87f34c2e4aad43cebef777800742b
- SSDEEP
  
  3072:eSf/dfuraZJXENc8uCXJiXK1K2LS1G2B+vioyUSdUuD5BBNcRrxOJ+cmH:eSf/MQ15t1TB+PSHexLco
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
- 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