tofsee | a5bb6d566c4c9a22c069bd3fe5624e893fda78d6c4a7321bbc9c3ffce9c55159 | Triage

Sharing

General

Target

a5bb6d566c4c9a22c069bd3fe5624e893fda78d6c4a7321bbc9c3ffce9c55159
Size

151KB
Sample

240417-qs6zzahf55
MD5

201b2f40f13b20813c9fc74149465f40
SHA1

35f996a00e23431b34498c768994832b87fb3614
SHA256

a5bb6d566c4c9a22c069bd3fe5624e893fda78d6c4a7321bbc9c3ffce9c55159
SHA512

b877769d7fb7200f66a7f1576d30bd3387f0bd6da9b0d614755116129ab1ff6a1dd473e4c1fd997ac4c5059549d2cef8328d3301ffe38032f784c3a7ea886986
SSDEEP

3072:yifKcSkU0MAGI/JM7UZptIyKjb09AiMWYOjSrUDPSYLiypui/:ZKuU0MGO7UZpWyK3XNPOj8UDaKiquq

Score

10^/10

tofsee evasion persistence trojan

Malware Config

Extracted

Family

tofsee

C2

vanaheim.cn

jotunheim.name

Targets

- Target
  
  3d24879020f71f37768efb2dcd3724477b190b9f0c7f87c72edb472f81123ec5.exe
- Size
  
  238KB
- MD5
  
  761915a4ae82207a72f8b60786d00a97
- SHA1
  
  0892117051b95db0240247a83d9798c103b05897
- SHA256
  
  3d24879020f71f37768efb2dcd3724477b190b9f0c7f87c72edb472f81123ec5
- SHA512
  
  6dbb4dbf15d9c9f086394b6a52a2d59736b8454f525bdb39253b1a289f511edcd5fe33c43c1baf0cfa2aba186710d5442d111ce2343a6f2a26c82913c1eb2d4c
- SSDEEP
  
  3072:d/PLinbwusnVoPhS6dxuUo6U4Gn0gDbsw6QeKWl+4zQ/ZwBV7VP:d/PLCbxuUYGgDbskkwg
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