tofsee | 61bda36a3ecfcd82c3c356293325a3f23657ed11311d231c8b27d37802b2d19f

Analysis

max time kernel
148s
max time network
148s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
21-12-2024 17:10

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General

Target

61bda36a3ecfcd82c3c356293325a3f23657ed11311d231c8b27d37802b2d19f.exe
Size

296KB
MD5

a45f8ebd25b0e3b38b47b55946f2be0d
SHA1

357a124c0d3c1febbda25cff5ecec3c2f1818ea5
SHA256

61bda36a3ecfcd82c3c356293325a3f23657ed11311d231c8b27d37802b2d19f
SHA512

10b819067ada2b0f1ce59b75d6f71866677d4677cf3537ed28979d66569f75286862c36cf09df8740cf21fdd548714edac5229888f2774874df818a3f2bae6df
SSDEEP

6144:AMYU+cI16IZX2ZFDDvT8iiX3P2uzbgwu:zYf16iG3EiiXeunn

Score

10^/10

tofsee discovery evasion execution persistence privilege_escalation trojan

Malware Config

Extracted

Family

tofsee

patmushta.info

parubey.info

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\uwtvlvdl = "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
1920	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\uwtvlvdl\ImagePath = "C:\\Windows\\SysWOW64\\uwtvlvdl\\duifsyb.exe"	svchost.exe

Deletes itself 1 IoCs

pid	Process
2384	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
3012	duifsyb.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3012 set thread context of 2384	3012	duifsyb.exe	43

Launches sc.exe 3 IoCs

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

pid	Process
2804	sc.exe
2548	sc.exe
2612	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	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	61bda36a3ecfcd82c3c356293325a3f23657ed11311d231c8b27d37802b2d19f.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	duifsyb.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

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 2792 wrote to memory of 3060	2792	61bda36a3ecfcd82c3c356293325a3f23657ed11311d231c8b27d37802b2d19f.exe	30
PID 2792 wrote to memory of 3060	2792	61bda36a3ecfcd82c3c356293325a3f23657ed11311d231c8b27d37802b2d19f.exe	30
PID 2792 wrote to memory of 3060	2792	61bda36a3ecfcd82c3c356293325a3f23657ed11311d231c8b27d37802b2d19f.exe	30
PID 2792 wrote to memory of 3060	2792	61bda36a3ecfcd82c3c356293325a3f23657ed11311d231c8b27d37802b2d19f.exe	30
PID 2792 wrote to memory of 2852	2792	61bda36a3ecfcd82c3c356293325a3f23657ed11311d231c8b27d37802b2d19f.exe	32
PID 2792 wrote to memory of 2852	2792	61bda36a3ecfcd82c3c356293325a3f23657ed11311d231c8b27d37802b2d19f.exe	32
PID 2792 wrote to memory of 2852	2792	61bda36a3ecfcd82c3c356293325a3f23657ed11311d231c8b27d37802b2d19f.exe	32
PID 2792 wrote to memory of 2852	2792	61bda36a3ecfcd82c3c356293325a3f23657ed11311d231c8b27d37802b2d19f.exe	32
PID 2792 wrote to memory of 2804	2792	61bda36a3ecfcd82c3c356293325a3f23657ed11311d231c8b27d37802b2d19f.exe	34
PID 2792 wrote to memory of 2804	2792	61bda36a3ecfcd82c3c356293325a3f23657ed11311d231c8b27d37802b2d19f.exe	34
PID 2792 wrote to memory of 2804	2792	61bda36a3ecfcd82c3c356293325a3f23657ed11311d231c8b27d37802b2d19f.exe	34
PID 2792 wrote to memory of 2804	2792	61bda36a3ecfcd82c3c356293325a3f23657ed11311d231c8b27d37802b2d19f.exe	34
PID 2792 wrote to memory of 2548	2792	61bda36a3ecfcd82c3c356293325a3f23657ed11311d231c8b27d37802b2d19f.exe	36
PID 2792 wrote to memory of 2548	2792	61bda36a3ecfcd82c3c356293325a3f23657ed11311d231c8b27d37802b2d19f.exe	36
PID 2792 wrote to memory of 2548	2792	61bda36a3ecfcd82c3c356293325a3f23657ed11311d231c8b27d37802b2d19f.exe	36
PID 2792 wrote to memory of 2548	2792	61bda36a3ecfcd82c3c356293325a3f23657ed11311d231c8b27d37802b2d19f.exe	36
PID 2792 wrote to memory of 2612	2792	61bda36a3ecfcd82c3c356293325a3f23657ed11311d231c8b27d37802b2d19f.exe	38
PID 2792 wrote to memory of 2612	2792	61bda36a3ecfcd82c3c356293325a3f23657ed11311d231c8b27d37802b2d19f.exe	38
PID 2792 wrote to memory of 2612	2792	61bda36a3ecfcd82c3c356293325a3f23657ed11311d231c8b27d37802b2d19f.exe	38
PID 2792 wrote to memory of 2612	2792	61bda36a3ecfcd82c3c356293325a3f23657ed11311d231c8b27d37802b2d19f.exe	38
PID 2792 wrote to memory of 1920	2792	61bda36a3ecfcd82c3c356293325a3f23657ed11311d231c8b27d37802b2d19f.exe	41
PID 2792 wrote to memory of 1920	2792	61bda36a3ecfcd82c3c356293325a3f23657ed11311d231c8b27d37802b2d19f.exe	41
PID 2792 wrote to memory of 1920	2792	61bda36a3ecfcd82c3c356293325a3f23657ed11311d231c8b27d37802b2d19f.exe	41
PID 2792 wrote to memory of 1920	2792	61bda36a3ecfcd82c3c356293325a3f23657ed11311d231c8b27d37802b2d19f.exe	41
PID 3012 wrote to memory of 2384	3012	duifsyb.exe	43
PID 3012 wrote to memory of 2384	3012	duifsyb.exe	43
PID 3012 wrote to memory of 2384	3012	duifsyb.exe	43
PID 3012 wrote to memory of 2384	3012	duifsyb.exe	43
PID 3012 wrote to memory of 2384	3012	duifsyb.exe	43
PID 3012 wrote to memory of 2384	3012	duifsyb.exe	43

C:\Users\Admin\AppData\Local\Temp\61bda36a3ecfcd82c3c356293325a3f23657ed11311d231c8b27d37802b2d19f.exe
"C:\Users\Admin\AppData\Local\Temp\61bda36a3ecfcd82c3c356293325a3f23657ed11311d231c8b27d37802b2d19f.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2792
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\uwtvlvdl\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:3060
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\duifsyb.exe" C:\Windows\SysWOW64\uwtvlvdl\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2852
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create uwtvlvdl binPath= "C:\Windows\SysWOW64\uwtvlvdl\duifsyb.exe /d\"C:\Users\Admin\AppData\Local\Temp\61bda36a3ecfcd82c3c356293325a3f23657ed11311d231c8b27d37802b2d19f.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2804
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description uwtvlvdl "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2548
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start uwtvlvdl
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2612
- 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:1920

C:\Windows\SysWOW64\uwtvlvdl\duifsyb.exe
C:\Windows\SysWOW64\uwtvlvdl\duifsyb.exe /d"C:\Users\Admin\AppData\Local\Temp\61bda36a3ecfcd82c3c356293325a3f23657ed11311d231c8b27d37802b2d19f.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3012
- 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:2384

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\duifsyb.exe

Filesize
14.9MB

MD5
824dfcc0e227da693bca5f9cf5f586cf

SHA1
13b36bce40058c8d1cbb46bbf3fb92c61e856c73

SHA256
863cb6061e51dba618b94325ce1b3137b59202338a0cf451ee66f12cd2032f7a

SHA512
98fcbfb7792bd1bd6bd7bb4ff047af5232200c5db45cfdb07d9a38a0b8ab0fb9df7a1b533776e62d7904abd48503055df2cb7cfc94a780b015ef340c1f66b58f

Download Submit
memory/2384-13-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download
memory/2384-10-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download
memory/2384-12-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2384-16-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download
memory/2384-17-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download
memory/2792-2-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2792-1-0x0000000000220000-0x0000000000233000-memory.dmp

Filesize
76KB

Download
memory/2792-9-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2792-8-0x0000000000220000-0x0000000000233000-memory.dmp

Filesize
76KB

Download
memory/2792-7-0x0000000000030000-0x000000000003D000-memory.dmp

Filesize
52KB

Download
memory/2792-6-0x0000000000400000-0x0000000000452000-memory.dmp

Filesize
328KB

Download
memory/2792-0-0x0000000000030000-0x000000000003D000-memory.dmp

Filesize
52KB

Download
memory/3012-14-0x0000000000400000-0x0000000000452000-memory.dmp

Filesize
328KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads