tofsee | 50c458863b680d4b1c852fe9b6367c9a1fd6008ba4bd149f08ea71c8b06c2cb6

Analysis

max time kernel
149s
max time network
150s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
16-01-2025 16:46

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General

Target

tofsee.exe
Size

12.3MB
MD5

25d2b9e890383de8e4c54531aec432dd
SHA1

ccaa3021da481652aa28104eeb8af59a2ebb7ac7
SHA256

50c458863b680d4b1c852fe9b6367c9a1fd6008ba4bd149f08ea71c8b06c2cb6
SHA512

452991b58c1ef0d52f1971771a4fe01ce85dee5ee23d59adfdec703df4f5ec76a691fd6b4d3cd88a93736c14a886bd1df8825360efad8e2c99595dc4a4d3feb4
SSDEEP

6144:peeISXLAQ4G5g0RVOppo6xI4JbDva0uRjMgUgWWWWWWWWWWWWWWWWWWWWWWWWWWn:pzbXMG5goCfDva5RQg

Score

10^/10

tofsee discovery evasion execution persistence privilege_escalation trojan

Malware Config

Extracted

Family

tofsee

svartalfheim.top

jotunheim.name

Signatures

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

Windows security bypass 2 TTPs 1 IoCs

evasion trojan

Disable or Modify Tools

T1562.001

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths\C:\Windows\SysWOW64\utwgsvah = "0"	svchost.exe

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
2088	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\utwgsvah\ImagePath = "C:\\Windows\\SysWOW64\\utwgsvah\\dwtbslfc.exe"	svchost.exe

Deletes itself 1 IoCs

pid	Process
2852	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2728	dwtbslfc.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2728 set thread context of 2852	2728	dwtbslfc.exe	43

Launches sc.exe 3 IoCs

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

pid	Process
1244	sc.exe
2744	sc.exe
1260	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

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	sc.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
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	tofsee.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.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	dwtbslfc.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 1768 wrote to memory of 1672	1768	tofsee.exe	30
PID 1768 wrote to memory of 1672	1768	tofsee.exe	30
PID 1768 wrote to memory of 1672	1768	tofsee.exe	30
PID 1768 wrote to memory of 1672	1768	tofsee.exe	30
PID 1768 wrote to memory of 3032	1768	tofsee.exe	32
PID 1768 wrote to memory of 3032	1768	tofsee.exe	32
PID 1768 wrote to memory of 3032	1768	tofsee.exe	32
PID 1768 wrote to memory of 3032	1768	tofsee.exe	32
PID 1768 wrote to memory of 1260	1768	tofsee.exe	34
PID 1768 wrote to memory of 1260	1768	tofsee.exe	34
PID 1768 wrote to memory of 1260	1768	tofsee.exe	34
PID 1768 wrote to memory of 1260	1768	tofsee.exe	34
PID 1768 wrote to memory of 1244	1768	tofsee.exe	36
PID 1768 wrote to memory of 1244	1768	tofsee.exe	36
PID 1768 wrote to memory of 1244	1768	tofsee.exe	36
PID 1768 wrote to memory of 1244	1768	tofsee.exe	36
PID 1768 wrote to memory of 2744	1768	tofsee.exe	38
PID 1768 wrote to memory of 2744	1768	tofsee.exe	38
PID 1768 wrote to memory of 2744	1768	tofsee.exe	38
PID 1768 wrote to memory of 2744	1768	tofsee.exe	38
PID 1768 wrote to memory of 2088	1768	tofsee.exe	41
PID 1768 wrote to memory of 2088	1768	tofsee.exe	41
PID 1768 wrote to memory of 2088	1768	tofsee.exe	41
PID 1768 wrote to memory of 2088	1768	tofsee.exe	41
PID 2728 wrote to memory of 2852	2728	dwtbslfc.exe	43
PID 2728 wrote to memory of 2852	2728	dwtbslfc.exe	43
PID 2728 wrote to memory of 2852	2728	dwtbslfc.exe	43
PID 2728 wrote to memory of 2852	2728	dwtbslfc.exe	43
PID 2728 wrote to memory of 2852	2728	dwtbslfc.exe	43
PID 2728 wrote to memory of 2852	2728	dwtbslfc.exe	43

C:\Users\Admin\AppData\Local\Temp\tofsee.exe
"C:\Users\Admin\AppData\Local\Temp\tofsee.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1768
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\utwgsvah\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:1672
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\dwtbslfc.exe" C:\Windows\SysWOW64\utwgsvah\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:3032
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create utwgsvah binPath= "C:\Windows\SysWOW64\utwgsvah\dwtbslfc.exe /d\"C:\Users\Admin\AppData\Local\Temp\tofsee.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:1260
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description utwgsvah "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:1244
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start utwgsvah
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2744
- 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:2088

C:\Windows\SysWOW64\utwgsvah\dwtbslfc.exe
C:\Windows\SysWOW64\utwgsvah\dwtbslfc.exe /d"C:\Users\Admin\AppData\Local\Temp\tofsee.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2728
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Windows security bypass
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:2852

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

System Services

T1569

Service Execution

T1569.002

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Create or Modify System Process

T1543

Windows Service

T1543.003

Event Triggered Execution

T1546

Netsh Helper DLL

T1546.007

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Create or Modify System Process

T1543

Windows Service

T1543.003

Event Triggered Execution

T1546

Netsh Helper DLL

T1546.007

Defense Evasion

Impair Defenses

T1562

Disable or Modify System Firewall

T1562.004

Disable or Modify Tools

T1562.001

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

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

Filesize
12.5MB

MD5
a2994d761c87a366142b54aa1b65cc3f

SHA1
f9f7f03cb9ba1e7bd1f99ae09e2e798c4b49f667

SHA256
d699f07b14236bf5b4b29b807d192670abf5bbf9454081cfddf42068b94ff28e

SHA512
70689b738d7a8bd1d96198afa7159ba3de3ee1dd3b801b06f562183539486a634573349d51e19b83e23f6dd4003670ad65640bddd574a0281fb77befd2deb2c4

Download Submit
memory/1768-9-0x0000000000020000-0x0000000000033000-memory.dmp

Filesize
76KB

Download
memory/1768-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/1768-1-0x0000000000290000-0x0000000000390000-memory.dmp

Filesize
1024KB

Download
memory/1768-10-0x0000000000290000-0x0000000000390000-memory.dmp

Filesize
1024KB

Download
memory/1768-11-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/1768-2-0x0000000000020000-0x0000000000033000-memory.dmp

Filesize
76KB

Download
memory/1768-8-0x0000000000400000-0x000000000045D000-memory.dmp

Filesize
372KB

Download
memory/2728-16-0x0000000000400000-0x000000000045D000-memory.dmp

Filesize
372KB

Download
memory/2852-12-0x00000000000D0000-0x00000000000E5000-memory.dmp

Filesize
84KB

Download
memory/2852-15-0x00000000000D0000-0x00000000000E5000-memory.dmp

Filesize
84KB

Download
memory/2852-18-0x00000000000D0000-0x00000000000E5000-memory.dmp

Filesize
84KB

Download
memory/2852-14-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2852-19-0x00000000000D0000-0x00000000000E5000-memory.dmp

Filesize
84KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads