tofsee | fc8b39e1550508fc277adb212c06b4d858eec204fe9157947fcd8db28296a1d4

General

Target

8f770e85d9789cd77a5ebdf321ae54f5162d4b28c9f929ba4bf109bb770acfda.exe
Size

14.6MB
MD5

e22e7c6baeebd701b760f4a27a02d8c4
SHA1

1b924330a134a074ecb6f59affde76d6989100c0
SHA256

8f770e85d9789cd77a5ebdf321ae54f5162d4b28c9f929ba4bf109bb770acfda
SHA512

aa15560cb2fee8ae0c07acc6403f1ec9f33dc63cd6965d5e8af2f645970bb3c0fb7cec48646ddcaaa0fbef010bcdbc0468ea5c78658ea25994d1e1cd80e904e4
SSDEEP

98304:SC+PPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPf:x

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

Processes:

netsh.exe

pid	Process
1212	netsh.exe

Sets service image path in registry 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

svchost.exe

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\vydtwjck\ImagePath = "C:\\Windows\\SysWOW64\\vydtwjck\\ilemkmue.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

Processes:

8f770e85d9789cd77a5ebdf321ae54f5162d4b28c9f929ba4bf109bb770acfda.exe

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2412658365-3084825385-3340777666-1000\Control Panel\International\Geo\Nation	8f770e85d9789cd77a5ebdf321ae54f5162d4b28c9f929ba4bf109bb770acfda.exe

Deletes itself 1 IoCs

Processes:

svchost.exe

pid	Process
1888	svchost.exe

Executes dropped EXE 1 IoCs

Processes:

ilemkmue.exe

pid	Process
4012	ilemkmue.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

ilemkmue.exe

description	pid	Process	procid_target
PID 4012 set thread context of 1888	4012	ilemkmue.exe	99

Launches sc.exe 3 IoCs

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

Processes:

sc.exesc.exesc.exe

pid	Process
4072	sc.exe
3876	sc.exe
4960	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

Processes:

netsh.exe

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

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

Processes:

8f770e85d9789cd77a5ebdf321ae54f5162d4b28c9f929ba4bf109bb770acfda.execmd.exesc.exesc.exeilemkmue.execmd.exesc.exenetsh.exesvchost.exe

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	8f770e85d9789cd77a5ebdf321ae54f5162d4b28c9f929ba4bf109bb770acfda.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	ilemkmue.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	netsh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

8f770e85d9789cd77a5ebdf321ae54f5162d4b28c9f929ba4bf109bb770acfda.exeilemkmue.exe

description	pid	Process	procid_target
PID 4856 wrote to memory of 724	4856	8f770e85d9789cd77a5ebdf321ae54f5162d4b28c9f929ba4bf109bb770acfda.exe	86
PID 4856 wrote to memory of 724	4856	8f770e85d9789cd77a5ebdf321ae54f5162d4b28c9f929ba4bf109bb770acfda.exe	86
PID 4856 wrote to memory of 724	4856	8f770e85d9789cd77a5ebdf321ae54f5162d4b28c9f929ba4bf109bb770acfda.exe	86
PID 4856 wrote to memory of 1556	4856	8f770e85d9789cd77a5ebdf321ae54f5162d4b28c9f929ba4bf109bb770acfda.exe	88
PID 4856 wrote to memory of 1556	4856	8f770e85d9789cd77a5ebdf321ae54f5162d4b28c9f929ba4bf109bb770acfda.exe	88
PID 4856 wrote to memory of 1556	4856	8f770e85d9789cd77a5ebdf321ae54f5162d4b28c9f929ba4bf109bb770acfda.exe	88
PID 4856 wrote to memory of 4072	4856	8f770e85d9789cd77a5ebdf321ae54f5162d4b28c9f929ba4bf109bb770acfda.exe	90
PID 4856 wrote to memory of 4072	4856	8f770e85d9789cd77a5ebdf321ae54f5162d4b28c9f929ba4bf109bb770acfda.exe	90
PID 4856 wrote to memory of 4072	4856	8f770e85d9789cd77a5ebdf321ae54f5162d4b28c9f929ba4bf109bb770acfda.exe	90
PID 4856 wrote to memory of 3876	4856	8f770e85d9789cd77a5ebdf321ae54f5162d4b28c9f929ba4bf109bb770acfda.exe	92
PID 4856 wrote to memory of 3876	4856	8f770e85d9789cd77a5ebdf321ae54f5162d4b28c9f929ba4bf109bb770acfda.exe	92
PID 4856 wrote to memory of 3876	4856	8f770e85d9789cd77a5ebdf321ae54f5162d4b28c9f929ba4bf109bb770acfda.exe	92
PID 4856 wrote to memory of 4960	4856	8f770e85d9789cd77a5ebdf321ae54f5162d4b28c9f929ba4bf109bb770acfda.exe	94
PID 4856 wrote to memory of 4960	4856	8f770e85d9789cd77a5ebdf321ae54f5162d4b28c9f929ba4bf109bb770acfda.exe	94
PID 4856 wrote to memory of 4960	4856	8f770e85d9789cd77a5ebdf321ae54f5162d4b28c9f929ba4bf109bb770acfda.exe	94
PID 4856 wrote to memory of 1212	4856	8f770e85d9789cd77a5ebdf321ae54f5162d4b28c9f929ba4bf109bb770acfda.exe	97
PID 4856 wrote to memory of 1212	4856	8f770e85d9789cd77a5ebdf321ae54f5162d4b28c9f929ba4bf109bb770acfda.exe	97
PID 4856 wrote to memory of 1212	4856	8f770e85d9789cd77a5ebdf321ae54f5162d4b28c9f929ba4bf109bb770acfda.exe	97
PID 4012 wrote to memory of 1888	4012	ilemkmue.exe	99
PID 4012 wrote to memory of 1888	4012	ilemkmue.exe	99
PID 4012 wrote to memory of 1888	4012	ilemkmue.exe	99
PID 4012 wrote to memory of 1888	4012	ilemkmue.exe	99
PID 4012 wrote to memory of 1888	4012	ilemkmue.exe	99

C:\Users\Admin\AppData\Local\Temp\8f770e85d9789cd77a5ebdf321ae54f5162d4b28c9f929ba4bf109bb770acfda.exe
"C:\Users\Admin\AppData\Local\Temp\8f770e85d9789cd77a5ebdf321ae54f5162d4b28c9f929ba4bf109bb770acfda.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4856
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\vydtwjck\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:724
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\ilemkmue.exe" C:\Windows\SysWOW64\vydtwjck\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:1556
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create vydtwjck binPath= "C:\Windows\SysWOW64\vydtwjck\ilemkmue.exe /d\"C:\Users\Admin\AppData\Local\Temp\8f770e85d9789cd77a5ebdf321ae54f5162d4b28c9f929ba4bf109bb770acfda.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4072
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description vydtwjck "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3876
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start vydtwjck
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4960
- 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:1212

C:\Windows\SysWOW64\vydtwjck\ilemkmue.exe
C:\Windows\SysWOW64\vydtwjck\ilemkmue.exe /d"C:\Users\Admin\AppData\Local\Temp\8f770e85d9789cd77a5ebdf321ae54f5162d4b28c9f929ba4bf109bb770acfda.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4012
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:1888

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\ilemkmue.exe

Filesize
14.5MB

MD5
aa36ec95c5045b833c75a5ff798cb2a3

SHA1
2250aeb6029e07c0a374c337637e674523231857

SHA256
3234263d789902d6ed7b32b08b478db5b3e7e3af2177b8fa13d9a10b7d022eda

SHA512
145dfc19925b02b895edc29ba231ba58de232a2c8b8f69f32cef9300d77ce7a0fc9c6d99f434b3f71cc64c1703ec6aac78dea0dac1f43b1173468a053775630d

Download Submit
memory/1888-14-0x0000000000450000-0x0000000000465000-memory.dmp

Filesize
84KB

Download
memory/1888-19-0x0000000000450000-0x0000000000465000-memory.dmp

Filesize
84KB

Download
memory/1888-17-0x0000000000450000-0x0000000000465000-memory.dmp

Filesize
84KB

Download
memory/4012-11-0x0000000000400000-0x00000000004AD000-memory.dmp

Filesize
692KB

Download
memory/4012-13-0x0000000000400000-0x00000000004AD000-memory.dmp

Filesize
692KB

Download
memory/4012-12-0x0000000000400000-0x00000000004AD000-memory.dmp

Filesize
692KB

Download
memory/4012-18-0x0000000000400000-0x00000000004AD000-memory.dmp

Filesize
692KB

Download
memory/4856-9-0x00000000021F0000-0x0000000002203000-memory.dmp

Filesize
76KB

Download
memory/4856-8-0x0000000000400000-0x00000000004AD000-memory.dmp

Filesize
692KB

Download
memory/4856-2-0x00000000021F0000-0x0000000002203000-memory.dmp

Filesize
76KB

Download
memory/4856-10-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/4856-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/4856-1-0x0000000000640000-0x0000000000740000-memory.dmp

Filesize
1024KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads