tofsee | f333a0be1d5c870dec819b2f818c6fb69c01a435e9fc54ce9102809fca9469b0

Analysis

max time kernel
144s
max time network
145s
platform
windows7_x64
resource
win7-20241023-en
resource tags

arch:x64arch:x86image:win7-20241023-enlocale:en-usos:windows7-x64system
submitted
24-12-2024 21:32

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General

Target

c801719a85627afbece42c8eefba84f6d56957d0f17381b5d464234621aee411.exe
Size

265KB
MD5

398239e317f655000598f69007041f16
SHA1

78e59ccc2a557308c64de915d1165149b1da2f1e
SHA256

c801719a85627afbece42c8eefba84f6d56957d0f17381b5d464234621aee411
SHA512

7e9868cf2508c749c1917e252fdf1bb6abb4e2d895765fe48612492cdfc6888098760e48a0a0eacbb784f092d1ceb7ecf3550ed69cd91267500cf8da4ae42667
SSDEEP

3072:YsNl37q7cp+RWJg986U7Ti5NVggjcGkNIVqIOM/h3sRH4KA:RH7q7cpauG8h7m7ITsqxLE

Score

10^/10

tofsee discovery evasion execution persistence privilege_escalation trojan

Malware Config

Extracted

Family

tofsee

patmushta.info

ovicrush.cn

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\xwgyxnor = "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
2676	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\xwgyxnor\ImagePath = "C:\\Windows\\SysWOW64\\xwgyxnor\\drsuwbor.exe"	svchost.exe

Deletes itself 1 IoCs

pid	Process
2444	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2660	drsuwbor.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2660 set thread context of 2444	2660	drsuwbor.exe	43

Launches sc.exe 3 IoCs

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

pid	Process
2940	sc.exe
2996	sc.exe
2772	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	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	netsh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	c801719a85627afbece42c8eefba84f6d56957d0f17381b5d464234621aee411.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	drsuwbor.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 2452 wrote to memory of 2912	2452	c801719a85627afbece42c8eefba84f6d56957d0f17381b5d464234621aee411.exe	30
PID 2452 wrote to memory of 2912	2452	c801719a85627afbece42c8eefba84f6d56957d0f17381b5d464234621aee411.exe	30
PID 2452 wrote to memory of 2912	2452	c801719a85627afbece42c8eefba84f6d56957d0f17381b5d464234621aee411.exe	30
PID 2452 wrote to memory of 2912	2452	c801719a85627afbece42c8eefba84f6d56957d0f17381b5d464234621aee411.exe	30
PID 2452 wrote to memory of 2788	2452	c801719a85627afbece42c8eefba84f6d56957d0f17381b5d464234621aee411.exe	32
PID 2452 wrote to memory of 2788	2452	c801719a85627afbece42c8eefba84f6d56957d0f17381b5d464234621aee411.exe	32
PID 2452 wrote to memory of 2788	2452	c801719a85627afbece42c8eefba84f6d56957d0f17381b5d464234621aee411.exe	32
PID 2452 wrote to memory of 2788	2452	c801719a85627afbece42c8eefba84f6d56957d0f17381b5d464234621aee411.exe	32
PID 2452 wrote to memory of 2940	2452	c801719a85627afbece42c8eefba84f6d56957d0f17381b5d464234621aee411.exe	34
PID 2452 wrote to memory of 2940	2452	c801719a85627afbece42c8eefba84f6d56957d0f17381b5d464234621aee411.exe	34
PID 2452 wrote to memory of 2940	2452	c801719a85627afbece42c8eefba84f6d56957d0f17381b5d464234621aee411.exe	34
PID 2452 wrote to memory of 2940	2452	c801719a85627afbece42c8eefba84f6d56957d0f17381b5d464234621aee411.exe	34
PID 2452 wrote to memory of 2996	2452	c801719a85627afbece42c8eefba84f6d56957d0f17381b5d464234621aee411.exe	36
PID 2452 wrote to memory of 2996	2452	c801719a85627afbece42c8eefba84f6d56957d0f17381b5d464234621aee411.exe	36
PID 2452 wrote to memory of 2996	2452	c801719a85627afbece42c8eefba84f6d56957d0f17381b5d464234621aee411.exe	36
PID 2452 wrote to memory of 2996	2452	c801719a85627afbece42c8eefba84f6d56957d0f17381b5d464234621aee411.exe	36
PID 2452 wrote to memory of 2772	2452	c801719a85627afbece42c8eefba84f6d56957d0f17381b5d464234621aee411.exe	38
PID 2452 wrote to memory of 2772	2452	c801719a85627afbece42c8eefba84f6d56957d0f17381b5d464234621aee411.exe	38
PID 2452 wrote to memory of 2772	2452	c801719a85627afbece42c8eefba84f6d56957d0f17381b5d464234621aee411.exe	38
PID 2452 wrote to memory of 2772	2452	c801719a85627afbece42c8eefba84f6d56957d0f17381b5d464234621aee411.exe	38
PID 2452 wrote to memory of 2676	2452	c801719a85627afbece42c8eefba84f6d56957d0f17381b5d464234621aee411.exe	41
PID 2452 wrote to memory of 2676	2452	c801719a85627afbece42c8eefba84f6d56957d0f17381b5d464234621aee411.exe	41
PID 2452 wrote to memory of 2676	2452	c801719a85627afbece42c8eefba84f6d56957d0f17381b5d464234621aee411.exe	41
PID 2452 wrote to memory of 2676	2452	c801719a85627afbece42c8eefba84f6d56957d0f17381b5d464234621aee411.exe	41
PID 2660 wrote to memory of 2444	2660	drsuwbor.exe	43
PID 2660 wrote to memory of 2444	2660	drsuwbor.exe	43
PID 2660 wrote to memory of 2444	2660	drsuwbor.exe	43
PID 2660 wrote to memory of 2444	2660	drsuwbor.exe	43
PID 2660 wrote to memory of 2444	2660	drsuwbor.exe	43
PID 2660 wrote to memory of 2444	2660	drsuwbor.exe	43

C:\Users\Admin\AppData\Local\Temp\c801719a85627afbece42c8eefba84f6d56957d0f17381b5d464234621aee411.exe
"C:\Users\Admin\AppData\Local\Temp\c801719a85627afbece42c8eefba84f6d56957d0f17381b5d464234621aee411.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2452
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\xwgyxnor\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2912
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\drsuwbor.exe" C:\Windows\SysWOW64\xwgyxnor\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2788
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create xwgyxnor binPath= "C:\Windows\SysWOW64\xwgyxnor\drsuwbor.exe /d\"C:\Users\Admin\AppData\Local\Temp\c801719a85627afbece42c8eefba84f6d56957d0f17381b5d464234621aee411.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2940
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description xwgyxnor "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2996
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start xwgyxnor
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2772
- 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:2676

C:\Windows\SysWOW64\xwgyxnor\drsuwbor.exe
C:\Windows\SysWOW64\xwgyxnor\drsuwbor.exe /d"C:\Users\Admin\AppData\Local\Temp\c801719a85627afbece42c8eefba84f6d56957d0f17381b5d464234621aee411.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2660
- 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:2444

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\drsuwbor.exe

Filesize
10.0MB

MD5
b2cb31e86e95d00edd92915dcf68c206

SHA1
52e43a288261ca50b0b5d635df3023b989c64bc8

SHA256
0d31c16449b125cee22601ef456aadc3db7dd0a0272095c83d7a0e4fbae6a345

SHA512
58570e19ad5e75ca4346a7ec9671c9f6e2d02923b36fa435c4af22171eb1cac70ada2307054b944abbc317256e0274f3dc55c1da9ea6851bb81205010654e03e

Download Submit
memory/2444-13-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2444-11-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2444-12-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2444-15-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2444-17-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2452-2-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2452-1-0x0000000000230000-0x0000000000243000-memory.dmp

Filesize
76KB

Download
memory/2452-6-0x0000000000400000-0x000000000065B000-memory.dmp

Filesize
2.4MB

Download
memory/2452-9-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2452-8-0x0000000000230000-0x0000000000243000-memory.dmp

Filesize
76KB

Download
memory/2452-7-0x0000000000220000-0x000000000022D000-memory.dmp

Filesize
52KB

Download
memory/2452-0-0x0000000000220000-0x000000000022D000-memory.dmp

Filesize
52KB

Download
memory/2660-16-0x0000000000400000-0x000000000065B000-memory.dmp

Filesize
2.4MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads