tofsee | 1dc79692db8709e88fee042c5555f8432dc4638442887d8150b8b7c67f5f3eb2 | Triage

Sharing

General

Target

35f519000ad078d242c0bce097c59b31
Size

326KB
Sample

240504-ql3c7sfa8t
MD5

35f519000ad078d242c0bce097c59b31
SHA1

41a3c859c36a4240a51e6ce17ab269e8d2728eb0
SHA256

1dc79692db8709e88fee042c5555f8432dc4638442887d8150b8b7c67f5f3eb2
SHA512

260f2efe4757c518f96269ba3a3fd5b5c603fa6a52d9c0d976222158609911004ce48df4e75298c11de67ea29d91969f217986e4c0f1b83bb2f5d2a43a772997
SSDEEP

3072:KLTZ5XJKQsp6NU4tqwCyc40r+oeHpmCR54kDSWegJSVE+Er20L4fdoiKuIov5QId:KbCt44p40rqHPbDb86r2LiNovrb/a

Score

10^/10

tofsee evasion execution persistence trojan

Malware Config

Extracted

Family

tofsee

C2

vanaheim.cn

jotunheim.name

Targets

- Target
  
  35f519000ad078d242c0bce097c59b31
- Size
  
  326KB
- MD5
  
  35f519000ad078d242c0bce097c59b31
- SHA1
  
  41a3c859c36a4240a51e6ce17ab269e8d2728eb0
- SHA256
  
  1dc79692db8709e88fee042c5555f8432dc4638442887d8150b8b7c67f5f3eb2
- SHA512
  
  260f2efe4757c518f96269ba3a3fd5b5c603fa6a52d9c0d976222158609911004ce48df4e75298c11de67ea29d91969f217986e4c0f1b83bb2f5d2a43a772997
- SSDEEP
  
  3072:KLTZ5XJKQsp6NU4tqwCyc40r+oeHpmCR54kDSWegJSVE+Er20L4fdoiKuIov5QId:KbCt44p40rqHPbDb86r2LiNovrb/a
Score

10^/10

tofsee evasion execution 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 execution
- 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

System Services

Service 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

tofseeevasionexecutionpersistencetrojan

behavioral2

tofseeevasionexecutionpersistencetrojan