tofsee | 7e9dcf4dbc0fc5a0196b7cac80ade6dc1965ff0404e41cd4754c7ad98f723ba4

Analysis

max time kernel
146s
max time network
147s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
29-12-2024 23:12

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General

Target

b49a0f70c825b7b3dec72b1205df3f32112e226003b365ce0e027e0c5a6600c4.exe
Size

12.2MB
MD5

73611efc149014c994fedbdebd25fb36
SHA1

3b13c6f2fa9dbc51c546570e51bf3ba912b71d9f
SHA256

b49a0f70c825b7b3dec72b1205df3f32112e226003b365ce0e027e0c5a6600c4
SHA512

18229c238aea6e1c4f4cf17fbb4c3840508a4bbec80fa8b55b11157f8737a13c55cb6c70038559d809027870bdfdce69d795d4832a41e78d988077597bd07316
SSDEEP

98304:j66666666666666666666666666666666666666666666666666666666666666q:

Score

10^/10

tofsee discovery evasion execution persistence privilege_escalation trojan

Malware Config

Extracted

Family

tofsee

defeatwax.ru

refabyd.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\whhxhdwl = "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
2816	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\whhxhdwl\ImagePath = "C:\\Windows\\SysWOW64\\whhxhdwl\\orksqsak.exe"	svchost.exe

Deletes itself 1 IoCs

pid	Process
2724	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
1508	orksqsak.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1508 set thread context of 2724	1508	orksqsak.exe	43

Launches sc.exe 3 IoCs

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

pid	Process
1900	sc.exe
2980	sc.exe
2712	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	b49a0f70c825b7b3dec72b1205df3f32112e226003b365ce0e027e0c5a6600c4.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	orksqsak.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	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 2532 wrote to memory of 2192	2532	b49a0f70c825b7b3dec72b1205df3f32112e226003b365ce0e027e0c5a6600c4.exe	30
PID 2532 wrote to memory of 2192	2532	b49a0f70c825b7b3dec72b1205df3f32112e226003b365ce0e027e0c5a6600c4.exe	30
PID 2532 wrote to memory of 2192	2532	b49a0f70c825b7b3dec72b1205df3f32112e226003b365ce0e027e0c5a6600c4.exe	30
PID 2532 wrote to memory of 2192	2532	b49a0f70c825b7b3dec72b1205df3f32112e226003b365ce0e027e0c5a6600c4.exe	30
PID 2532 wrote to memory of 2404	2532	b49a0f70c825b7b3dec72b1205df3f32112e226003b365ce0e027e0c5a6600c4.exe	32
PID 2532 wrote to memory of 2404	2532	b49a0f70c825b7b3dec72b1205df3f32112e226003b365ce0e027e0c5a6600c4.exe	32
PID 2532 wrote to memory of 2404	2532	b49a0f70c825b7b3dec72b1205df3f32112e226003b365ce0e027e0c5a6600c4.exe	32
PID 2532 wrote to memory of 2404	2532	b49a0f70c825b7b3dec72b1205df3f32112e226003b365ce0e027e0c5a6600c4.exe	32
PID 2532 wrote to memory of 1900	2532	b49a0f70c825b7b3dec72b1205df3f32112e226003b365ce0e027e0c5a6600c4.exe	34
PID 2532 wrote to memory of 1900	2532	b49a0f70c825b7b3dec72b1205df3f32112e226003b365ce0e027e0c5a6600c4.exe	34
PID 2532 wrote to memory of 1900	2532	b49a0f70c825b7b3dec72b1205df3f32112e226003b365ce0e027e0c5a6600c4.exe	34
PID 2532 wrote to memory of 1900	2532	b49a0f70c825b7b3dec72b1205df3f32112e226003b365ce0e027e0c5a6600c4.exe	34
PID 2532 wrote to memory of 2980	2532	b49a0f70c825b7b3dec72b1205df3f32112e226003b365ce0e027e0c5a6600c4.exe	36
PID 2532 wrote to memory of 2980	2532	b49a0f70c825b7b3dec72b1205df3f32112e226003b365ce0e027e0c5a6600c4.exe	36
PID 2532 wrote to memory of 2980	2532	b49a0f70c825b7b3dec72b1205df3f32112e226003b365ce0e027e0c5a6600c4.exe	36
PID 2532 wrote to memory of 2980	2532	b49a0f70c825b7b3dec72b1205df3f32112e226003b365ce0e027e0c5a6600c4.exe	36
PID 2532 wrote to memory of 2712	2532	b49a0f70c825b7b3dec72b1205df3f32112e226003b365ce0e027e0c5a6600c4.exe	38
PID 2532 wrote to memory of 2712	2532	b49a0f70c825b7b3dec72b1205df3f32112e226003b365ce0e027e0c5a6600c4.exe	38
PID 2532 wrote to memory of 2712	2532	b49a0f70c825b7b3dec72b1205df3f32112e226003b365ce0e027e0c5a6600c4.exe	38
PID 2532 wrote to memory of 2712	2532	b49a0f70c825b7b3dec72b1205df3f32112e226003b365ce0e027e0c5a6600c4.exe	38
PID 2532 wrote to memory of 2816	2532	b49a0f70c825b7b3dec72b1205df3f32112e226003b365ce0e027e0c5a6600c4.exe	41
PID 2532 wrote to memory of 2816	2532	b49a0f70c825b7b3dec72b1205df3f32112e226003b365ce0e027e0c5a6600c4.exe	41
PID 2532 wrote to memory of 2816	2532	b49a0f70c825b7b3dec72b1205df3f32112e226003b365ce0e027e0c5a6600c4.exe	41
PID 2532 wrote to memory of 2816	2532	b49a0f70c825b7b3dec72b1205df3f32112e226003b365ce0e027e0c5a6600c4.exe	41
PID 1508 wrote to memory of 2724	1508	orksqsak.exe	43
PID 1508 wrote to memory of 2724	1508	orksqsak.exe	43
PID 1508 wrote to memory of 2724	1508	orksqsak.exe	43
PID 1508 wrote to memory of 2724	1508	orksqsak.exe	43
PID 1508 wrote to memory of 2724	1508	orksqsak.exe	43
PID 1508 wrote to memory of 2724	1508	orksqsak.exe	43

C:\Users\Admin\AppData\Local\Temp\b49a0f70c825b7b3dec72b1205df3f32112e226003b365ce0e027e0c5a6600c4.exe
"C:\Users\Admin\AppData\Local\Temp\b49a0f70c825b7b3dec72b1205df3f32112e226003b365ce0e027e0c5a6600c4.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2532
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\whhxhdwl\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2192
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\orksqsak.exe" C:\Windows\SysWOW64\whhxhdwl\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2404
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create whhxhdwl binPath= "C:\Windows\SysWOW64\whhxhdwl\orksqsak.exe /d\"C:\Users\Admin\AppData\Local\Temp\b49a0f70c825b7b3dec72b1205df3f32112e226003b365ce0e027e0c5a6600c4.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:1900
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description whhxhdwl "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2980
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start whhxhdwl
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2712
- 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:2816

C:\Windows\SysWOW64\whhxhdwl\orksqsak.exe
C:\Windows\SysWOW64\whhxhdwl\orksqsak.exe /d"C:\Users\Admin\AppData\Local\Temp\b49a0f70c825b7b3dec72b1205df3f32112e226003b365ce0e027e0c5a6600c4.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1508
- 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:2724

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\orksqsak.exe

Filesize
10.3MB

MD5
2ec02894bd395b400f9630d3e1755841

SHA1
e3ecc7bcf415022730933f53e66cf258f339e3b6

SHA256
b8261f867253f6088eeac322dcb33f764113f98638a612d859c9df7837d69485

SHA512
ca0fe01c386e4f6ed81efea65ed7757e85c569e3a183ab2fe03be211aee01ce72126ad7155201f33d59bb927007c7967eecfb4a896282bc11758f8b4083598e3

Download Submit
memory/1508-18-0x0000000000400000-0x0000000002B52000-memory.dmp

Filesize
39.3MB

Download
memory/2532-10-0x00000000002B0000-0x00000000003B0000-memory.dmp

Filesize
1024KB

Download
memory/2532-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2532-9-0x00000000001B0000-0x00000000001C3000-memory.dmp

Filesize
76KB

Download
memory/2532-11-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2532-1-0x00000000002B0000-0x00000000003B0000-memory.dmp

Filesize
1024KB

Download
memory/2532-8-0x0000000000400000-0x0000000002B52000-memory.dmp

Filesize
39.3MB

Download
memory/2532-2-0x00000000001B0000-0x00000000001C3000-memory.dmp

Filesize
76KB

Download
memory/2724-15-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2724-14-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2724-12-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2724-17-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2724-19-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads