tofsee | 30d680f3ae43fd8dfb13eb0d9e97abb1006a5fcc985903d7e0b2d2a973ab28de

General

Target

dd74a7e347d234599ba9a11fbd4d16a26a8f433c386cd30979938c8c039c4cfa.exe
Size

13.3MB
MD5

45458daf16a9f56222038e23cd8665f9
SHA1

c0880db345e5f94e5408707e7b495ab00ff6dc8c
SHA256

dd74a7e347d234599ba9a11fbd4d16a26a8f433c386cd30979938c8c039c4cfa
SHA512

f0154db0bca16aae19094f7f0236d91b4d49824b1a56c60bea75a19b9633490a578279eb290254c78ecbffa720c6dcdac191af34d1a2e6db046a95d292715231
SSDEEP

98304:dY3333333333333333333333333333333333333333333333333333333333333H:d

Score

10^/10

tofsee discovery evasion execution persistence privilege_escalation trojan

Malware Config

Extracted

Family

tofsee

C2

defeatwax.ru

refabyd.info

Signatures

Tofsee
Backdoor/botnet which carries out malicious activities based on commands from a C2 server.
trojan tofsee
Creates new service(s) 2 TTPs
persistence execution

Windows Service
T1543.003

Service Execution
T1569.002

Modifies Windows Firewall 2 TTPs 1 IoCs

evasion

Windows Service

T1543.003

Disable or Modify System Firewall

T1562.004

pid	Process
3372	netsh.exe

Sets service image path in registry 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\fvvqszuz\ImagePath = "C:\\Windows\\SysWOW64\\fvvqszuz\\amyggrgo.exe"	svchost.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-4182098368-2521458979-3782681353-1000\Control Panel\International\Geo\Nation	dd74a7e347d234599ba9a11fbd4d16a26a8f433c386cd30979938c8c039c4cfa.exe

Deletes itself 1 IoCs

pid	Process
3616	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
5868	amyggrgo.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 5868 set thread context of 3616	5868	amyggrgo.exe	102

Launches sc.exe 3 IoCs

Sc.exe is a Windows utlilty to control services on the system.

pid	Process
3944	sc.exe
5024	sc.exe
5764	sc.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Event Triggered Execution: Netsh Helper DLL 1 TTPs 3 IoCs

Netsh.exe (also referred to as Netshell) is a command-line scripting utility used to interact with the network configuration of a system.

persistence privilege_escalation

Netsh Helper DLL

T1546.007

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe
Key queried	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe
Key value enumerated	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe

Program crash 2 IoCs

pid	pid_target	Process	procid_target
3236	5360	WerFault.exe	82
3760	5868	WerFault.exe	96

System Location Discovery: System Language Discovery 1 TTPs 9 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	netsh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	amyggrgo.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	dd74a7e347d234599ba9a11fbd4d16a26a8f433c386cd30979938c8c039c4cfa.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 5360 wrote to memory of 1888	5360	dd74a7e347d234599ba9a11fbd4d16a26a8f433c386cd30979938c8c039c4cfa.exe	86
PID 5360 wrote to memory of 1888	5360	dd74a7e347d234599ba9a11fbd4d16a26a8f433c386cd30979938c8c039c4cfa.exe	86
PID 5360 wrote to memory of 1888	5360	dd74a7e347d234599ba9a11fbd4d16a26a8f433c386cd30979938c8c039c4cfa.exe	86
PID 5360 wrote to memory of 5180	5360	dd74a7e347d234599ba9a11fbd4d16a26a8f433c386cd30979938c8c039c4cfa.exe	88
PID 5360 wrote to memory of 5180	5360	dd74a7e347d234599ba9a11fbd4d16a26a8f433c386cd30979938c8c039c4cfa.exe	88
PID 5360 wrote to memory of 5180	5360	dd74a7e347d234599ba9a11fbd4d16a26a8f433c386cd30979938c8c039c4cfa.exe	88
PID 5360 wrote to memory of 3944	5360	dd74a7e347d234599ba9a11fbd4d16a26a8f433c386cd30979938c8c039c4cfa.exe	90
PID 5360 wrote to memory of 3944	5360	dd74a7e347d234599ba9a11fbd4d16a26a8f433c386cd30979938c8c039c4cfa.exe	90
PID 5360 wrote to memory of 3944	5360	dd74a7e347d234599ba9a11fbd4d16a26a8f433c386cd30979938c8c039c4cfa.exe	90
PID 5360 wrote to memory of 5024	5360	dd74a7e347d234599ba9a11fbd4d16a26a8f433c386cd30979938c8c039c4cfa.exe	92
PID 5360 wrote to memory of 5024	5360	dd74a7e347d234599ba9a11fbd4d16a26a8f433c386cd30979938c8c039c4cfa.exe	92
PID 5360 wrote to memory of 5024	5360	dd74a7e347d234599ba9a11fbd4d16a26a8f433c386cd30979938c8c039c4cfa.exe	92
PID 5360 wrote to memory of 5764	5360	dd74a7e347d234599ba9a11fbd4d16a26a8f433c386cd30979938c8c039c4cfa.exe	94
PID 5360 wrote to memory of 5764	5360	dd74a7e347d234599ba9a11fbd4d16a26a8f433c386cd30979938c8c039c4cfa.exe	94
PID 5360 wrote to memory of 5764	5360	dd74a7e347d234599ba9a11fbd4d16a26a8f433c386cd30979938c8c039c4cfa.exe	94
PID 5360 wrote to memory of 3372	5360	dd74a7e347d234599ba9a11fbd4d16a26a8f433c386cd30979938c8c039c4cfa.exe	97
PID 5360 wrote to memory of 3372	5360	dd74a7e347d234599ba9a11fbd4d16a26a8f433c386cd30979938c8c039c4cfa.exe	97
PID 5360 wrote to memory of 3372	5360	dd74a7e347d234599ba9a11fbd4d16a26a8f433c386cd30979938c8c039c4cfa.exe	97
PID 5868 wrote to memory of 3616	5868	amyggrgo.exe	102
PID 5868 wrote to memory of 3616	5868	amyggrgo.exe	102
PID 5868 wrote to memory of 3616	5868	amyggrgo.exe	102
PID 5868 wrote to memory of 3616	5868	amyggrgo.exe	102
PID 5868 wrote to memory of 3616	5868	amyggrgo.exe	102

C:\Users\Admin\AppData\Local\Temp\dd74a7e347d234599ba9a11fbd4d16a26a8f433c386cd30979938c8c039c4cfa.exe
"C:\Users\Admin\AppData\Local\Temp\dd74a7e347d234599ba9a11fbd4d16a26a8f433c386cd30979938c8c039c4cfa.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:5360
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\fvvqszuz\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:1888
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\amyggrgo.exe" C:\Windows\SysWOW64\fvvqszuz\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:5180
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create fvvqszuz binPath= "C:\Windows\SysWOW64\fvvqszuz\amyggrgo.exe /d\"C:\Users\Admin\AppData\Local\Temp\dd74a7e347d234599ba9a11fbd4d16a26a8f433c386cd30979938c8c039c4cfa.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3944
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description fvvqszuz "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:5024
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start fvvqszuz
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:5764
- C:\Windows\SysWOW64\netsh.exe
  "C:\Windows\System32\netsh.exe" advfirewall firewall add rule name="Host-process for services of Windows" dir=in action=allow program="C:\Windows\SysWOW64\svchost.exe" enable=yes>nul
  2⤵
  - Modifies Windows Firewall
  - Event Triggered Execution: Netsh Helper DLL
  - System Location Discovery: System Language Discovery
  PID:3372
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 5360 -s 1036
  2⤵
  - Program crash
  PID:3236

C:\Windows\SysWOW64\fvvqszuz\amyggrgo.exe
C:\Windows\SysWOW64\fvvqszuz\amyggrgo.exe /d"C:\Users\Admin\AppData\Local\Temp\dd74a7e347d234599ba9a11fbd4d16a26a8f433c386cd30979938c8c039c4cfa.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:5868
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:3616
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 5868 -s 528
  2⤵
  - Program crash
  PID:3760

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 428 -p 5360 -ip 5360
1⤵
PID:1556

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 412 -p 5868 -ip 5868
1⤵
PID:1180

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

System Services

1

T1569

Service Execution

1

T1569.002

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Create or Modify System Process

2

T1543

Windows Service

2

T1543.003

Event Triggered Execution

1

T1546

Netsh Helper DLL

1

T1546.007

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Create or Modify System Process

2

T1543

Windows Service

2

T1543.003

Event Triggered Execution

1

T1546

Netsh Helper DLL

1

T1546.007

Defense Evasion

Impair Defenses

1

T1562

Disable or Modify System Firewall

Modify Registry

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\amyggrgo.exe

Filesize
14.0MB

MD5
d21304fa345fe7203e5bc716842e43fe

SHA1
74c161febb2eabf3dd34ffa4869f904d3b2c8b74

SHA256
9555a5187b9678bce419c88e6bf19985cfe74e047f8898772a8a7c8bb3957ff7

SHA512
22a312b0a3f45517e44f21921e90c85261f98ad4a105c91a5807aced72fde0219e79abb77cdfe6bfce81ac11462d90c947c963a3a86120a58b5170d137b4137d

Download Submit
memory/3616-14-0x0000000000190000-0x00000000001A5000-memory.dmp

Filesize
84KB

Download
memory/3616-17-0x0000000000190000-0x00000000001A5000-memory.dmp

Filesize
84KB

Download
memory/3616-16-0x0000000000190000-0x00000000001A5000-memory.dmp

Filesize
84KB

Download
memory/5360-9-0x00000000001C0000-0x00000000001D3000-memory.dmp

Filesize
76KB

Download
memory/5360-10-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/5360-1-0x0000000000490000-0x0000000000590000-memory.dmp

Filesize
1024KB

Download
memory/5360-8-0x0000000000400000-0x0000000000448000-memory.dmp

Filesize
288KB

Download
memory/5360-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/5360-2-0x00000000001C0000-0x00000000001D3000-memory.dmp

Filesize
76KB

Download
memory/5868-12-0x0000000000400000-0x0000000000448000-memory.dmp

Filesize
288KB

Download
memory/5868-11-0x0000000000400000-0x0000000000448000-memory.dmp

Filesize
288KB

Download
memory/5868-13-0x0000000000400000-0x0000000000448000-memory.dmp

Filesize
288KB

Download
memory/5868-18-0x0000000000400000-0x0000000000448000-memory.dmp

Filesize
288KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads