tofsee | ef4eda0f7e7f357ff3018c8a331fbf101076677e34663129e55a791f4287e757 | Triage

Sharing

General

Target

ef4eda0f7e7f357ff3018c8a331fbf101076677e34663129e55a791f4287e757
Size

165KB
Sample

240417-qt8vyshg32
MD5

d45a6a1871e85409054fc3bc2396c548
SHA1

dfc112c879acac6eaa8c6844b613494754251069
SHA256

ef4eda0f7e7f357ff3018c8a331fbf101076677e34663129e55a791f4287e757
SHA512

abba86be5bde354aaafded28fb253db354b389bab343a206ac707a772364354bd48d6fb2274f73a74edc65723fa535b70f56a864e0e60d72baa35774a779807b
SSDEEP

3072:IBEk0NEvwOoKmO8e4b+kLJvLcm2/kYRcmjZgsEn7xrEc9xOwkJu46:oTA0MhLcZMYJjZgsEn7FxOR6

Score

10^/10

tofsee evasion persistence trojan

Malware Config

Extracted

Family

tofsee

C2

vanaheim.cn

jotunheim.name

Targets

- Target
  
  3cec06bcddcd94226a7436028917384f92a6921390cc1ee58548c3a51c448e5f.exe
- Size
  
  306KB
- MD5
  
  f4592b71d5dadabf66ee3700e84edf8b
- SHA1
  
  b32b3ecf9a3e82a0123998ce71857e53dac64150
- SHA256
  
  3cec06bcddcd94226a7436028917384f92a6921390cc1ee58548c3a51c448e5f
- SHA512
  
  5e3ebf43df2a9f35faf1368a2dab44777e560dc893bea3b75dc6f9fe1d2ccda9273dbfdf83eeed593f0c4ef9cb461210f85850ee84fdf89d10da186159150038
- SSDEEP
  
  3072:nY+QUDdSe9eBtw8snC2H2/q2v43YAy4iD1nJ75VyUZ7ixF7Mu63jXdo:b/KMC2H2yogyFP9jX
Score

10^/10

tofsee evasion persistence trojan
- Tofsee
  Backdoor/botnet which carries out malicious activities based on commands from a C2 server.
  trojan tofsee
- 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

Modify Registry

Credential Access

Discovery

Query Registry

System Information Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Tasks

static1

behavioral1

tofseeevasionpersistencetrojan

behavioral2

tofseeevasionpersistencetrojan