tofsee | b3d32ed0a3fdd776ba9f3dfcbd7e11cffaebe4ff879b9610c75c331fa4e78225

Analysis

max time kernel
146s
max time network
123s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
11-01-2025 21:54

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General

Target

b3d32ed0a3fdd776ba9f3dfcbd7e11cffaebe4ff879b9610c75c331fa4e78225.exe
Size

219KB
MD5

2ffd7895fec9b13e5926be2b55d035b9
SHA1

dc3182698e5878513677dca541016c32e74f37a8
SHA256

b3d32ed0a3fdd776ba9f3dfcbd7e11cffaebe4ff879b9610c75c331fa4e78225
SHA512

ee566d87997374a58cc26425d7fa4643380eb17ff02ea880cb1c4e84f0700c0aeaf61ced9f0ac9551ac646367dc73a9686abba4362405593469abce5cefed909
SSDEEP

3072:hrHIQm9TOcx4AGPmQ2OvWRNqxDJMIeALuIcY3bCl2OVdRUXqHy5kVw+HM:ZHUMPOyJveAao3afQ2VxHM

Score

10^/10

tofsee discovery evasion execution persistence privilege_escalation trojan

Malware Config

Extracted

Family

tofsee

43.231.4.7

lazystax.ru

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\vyfcwyll = "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
2520	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\vyfcwyll\ImagePath = "C:\\Windows\\SysWOW64\\vyfcwyll\\acxdwjt.exe"	svchost.exe

Deletes itself 1 IoCs

pid	Process
2768	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2580	acxdwjt.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2580 set thread context of 2768	2580	acxdwjt.exe	43

Launches sc.exe 3 IoCs

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

pid	Process
2612	sc.exe
2688	sc.exe
2716	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	b3d32ed0a3fdd776ba9f3dfcbd7e11cffaebe4ff879b9610c75c331fa4e78225.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe
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	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	netsh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	acxdwjt.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 2104 wrote to memory of 2760	2104	b3d32ed0a3fdd776ba9f3dfcbd7e11cffaebe4ff879b9610c75c331fa4e78225.exe	30
PID 2104 wrote to memory of 2760	2104	b3d32ed0a3fdd776ba9f3dfcbd7e11cffaebe4ff879b9610c75c331fa4e78225.exe	30
PID 2104 wrote to memory of 2760	2104	b3d32ed0a3fdd776ba9f3dfcbd7e11cffaebe4ff879b9610c75c331fa4e78225.exe	30
PID 2104 wrote to memory of 2760	2104	b3d32ed0a3fdd776ba9f3dfcbd7e11cffaebe4ff879b9610c75c331fa4e78225.exe	30
PID 2104 wrote to memory of 2800	2104	b3d32ed0a3fdd776ba9f3dfcbd7e11cffaebe4ff879b9610c75c331fa4e78225.exe	32
PID 2104 wrote to memory of 2800	2104	b3d32ed0a3fdd776ba9f3dfcbd7e11cffaebe4ff879b9610c75c331fa4e78225.exe	32
PID 2104 wrote to memory of 2800	2104	b3d32ed0a3fdd776ba9f3dfcbd7e11cffaebe4ff879b9610c75c331fa4e78225.exe	32
PID 2104 wrote to memory of 2800	2104	b3d32ed0a3fdd776ba9f3dfcbd7e11cffaebe4ff879b9610c75c331fa4e78225.exe	32
PID 2104 wrote to memory of 2716	2104	b3d32ed0a3fdd776ba9f3dfcbd7e11cffaebe4ff879b9610c75c331fa4e78225.exe	34
PID 2104 wrote to memory of 2716	2104	b3d32ed0a3fdd776ba9f3dfcbd7e11cffaebe4ff879b9610c75c331fa4e78225.exe	34
PID 2104 wrote to memory of 2716	2104	b3d32ed0a3fdd776ba9f3dfcbd7e11cffaebe4ff879b9610c75c331fa4e78225.exe	34
PID 2104 wrote to memory of 2716	2104	b3d32ed0a3fdd776ba9f3dfcbd7e11cffaebe4ff879b9610c75c331fa4e78225.exe	34
PID 2104 wrote to memory of 2612	2104	b3d32ed0a3fdd776ba9f3dfcbd7e11cffaebe4ff879b9610c75c331fa4e78225.exe	36
PID 2104 wrote to memory of 2612	2104	b3d32ed0a3fdd776ba9f3dfcbd7e11cffaebe4ff879b9610c75c331fa4e78225.exe	36
PID 2104 wrote to memory of 2612	2104	b3d32ed0a3fdd776ba9f3dfcbd7e11cffaebe4ff879b9610c75c331fa4e78225.exe	36
PID 2104 wrote to memory of 2612	2104	b3d32ed0a3fdd776ba9f3dfcbd7e11cffaebe4ff879b9610c75c331fa4e78225.exe	36
PID 2104 wrote to memory of 2688	2104	b3d32ed0a3fdd776ba9f3dfcbd7e11cffaebe4ff879b9610c75c331fa4e78225.exe	38
PID 2104 wrote to memory of 2688	2104	b3d32ed0a3fdd776ba9f3dfcbd7e11cffaebe4ff879b9610c75c331fa4e78225.exe	38
PID 2104 wrote to memory of 2688	2104	b3d32ed0a3fdd776ba9f3dfcbd7e11cffaebe4ff879b9610c75c331fa4e78225.exe	38
PID 2104 wrote to memory of 2688	2104	b3d32ed0a3fdd776ba9f3dfcbd7e11cffaebe4ff879b9610c75c331fa4e78225.exe	38
PID 2104 wrote to memory of 2520	2104	b3d32ed0a3fdd776ba9f3dfcbd7e11cffaebe4ff879b9610c75c331fa4e78225.exe	41
PID 2104 wrote to memory of 2520	2104	b3d32ed0a3fdd776ba9f3dfcbd7e11cffaebe4ff879b9610c75c331fa4e78225.exe	41
PID 2104 wrote to memory of 2520	2104	b3d32ed0a3fdd776ba9f3dfcbd7e11cffaebe4ff879b9610c75c331fa4e78225.exe	41
PID 2104 wrote to memory of 2520	2104	b3d32ed0a3fdd776ba9f3dfcbd7e11cffaebe4ff879b9610c75c331fa4e78225.exe	41
PID 2580 wrote to memory of 2768	2580	acxdwjt.exe	43
PID 2580 wrote to memory of 2768	2580	acxdwjt.exe	43
PID 2580 wrote to memory of 2768	2580	acxdwjt.exe	43
PID 2580 wrote to memory of 2768	2580	acxdwjt.exe	43
PID 2580 wrote to memory of 2768	2580	acxdwjt.exe	43
PID 2580 wrote to memory of 2768	2580	acxdwjt.exe	43

C:\Users\Admin\AppData\Local\Temp\b3d32ed0a3fdd776ba9f3dfcbd7e11cffaebe4ff879b9610c75c331fa4e78225.exe
"C:\Users\Admin\AppData\Local\Temp\b3d32ed0a3fdd776ba9f3dfcbd7e11cffaebe4ff879b9610c75c331fa4e78225.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2104
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\vyfcwyll\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2760
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\acxdwjt.exe" C:\Windows\SysWOW64\vyfcwyll\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2800
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create vyfcwyll binPath= "C:\Windows\SysWOW64\vyfcwyll\acxdwjt.exe /d\"C:\Users\Admin\AppData\Local\Temp\b3d32ed0a3fdd776ba9f3dfcbd7e11cffaebe4ff879b9610c75c331fa4e78225.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2716
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description vyfcwyll "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2612
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start vyfcwyll
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2688
- 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:2520

C:\Windows\SysWOW64\vyfcwyll\acxdwjt.exe
C:\Windows\SysWOW64\vyfcwyll\acxdwjt.exe /d"C:\Users\Admin\AppData\Local\Temp\b3d32ed0a3fdd776ba9f3dfcbd7e11cffaebe4ff879b9610c75c331fa4e78225.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2580
- 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:2768

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\acxdwjt.exe

Filesize
14.9MB

MD5
fb6f0d1f7681fabe024c38732e7578f0

SHA1
6da0a3f28706e504fbf7c6ae049ed21d4e29d303

SHA256
3704defb44d937bf8d8a56c1d63b775bda941f2b03c39a1b6cb99197954df747

SHA512
6073a6e89a643f5a5cd7761258bc436d94a5eab1e43650b3039935fbdd6aaac4c549425b21ce38e4626c95516758c31918420edebe2c11a6a88a147bb82c84a2

Download Submit
memory/2104-7-0x0000000000400000-0x0000000002BAD000-memory.dmp

Filesize
39.7MB

Download
memory/2104-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2104-2-0x0000000000220000-0x0000000000233000-memory.dmp

Filesize
76KB

Download
memory/2104-9-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2104-8-0x0000000000220000-0x0000000000233000-memory.dmp

Filesize
76KB

Download
memory/2104-1-0x0000000002D30000-0x0000000002E30000-memory.dmp

Filesize
1024KB

Download
memory/2580-17-0x0000000000400000-0x0000000002BAD000-memory.dmp

Filesize
39.7MB

Download
memory/2768-14-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download
memory/2768-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2768-11-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download
memory/2768-16-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download
memory/2768-18-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads