tofsee | 1ae6599bd7f5bdc497a81a9bb41a0f6bc42cbc9e8732fcc43ce9673bda24399f

General

Target

2025-01-13_af2bf1938e054d716d7c0c2ec40e7f7b_mafia.exe
Size

14.4MB
MD5

af2bf1938e054d716d7c0c2ec40e7f7b
SHA1

629db22de0467561fcbdc2e15f716e22c9d28eb0
SHA256

1ae6599bd7f5bdc497a81a9bb41a0f6bc42cbc9e8732fcc43ce9673bda24399f
SHA512

0f12812f76a4f44c48cbcd6b75fdf4ae6555cbf043c118011efa63841d0ab5b63a79aa1c53458de16ded28b8c80ededd56f51112069e8fbe1a140225ae3e98f2
SSDEEP

24576:j6WdLQkyQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQv:uWdLQk

Score

10^/10

tofsee discovery evasion execution persistence privilege_escalation trojan

Malware Config

Extracted

Family

tofsee

C2

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
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
4816	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\fufbjxyd\ImagePath = "C:\\Windows\\SysWOW64\\fufbjxyd\\vxsyreo.exe"	svchost.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2878641211-696417878-3864914810-1000\Control Panel\International\Geo\Nation	2025-01-13_af2bf1938e054d716d7c0c2ec40e7f7b_mafia.exe

Deletes itself 1 IoCs

pid	Process
3184	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
1884	vxsyreo.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1884 set thread context of 3184	1884	vxsyreo.exe	106

Launches sc.exe 3 IoCs

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

pid	Process
4036	sc.exe
3076	sc.exe
2152	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 value enumerated	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe
Key opened	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe
Key queried	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe

Program crash 2 IoCs

pid	pid_target	Process	procid_target
3212	3996	WerFault.exe	82
1588	1884	WerFault.exe	94

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	2025-01-13_af2bf1938e054d716d7c0c2ec40e7f7b_mafia.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	vxsyreo.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

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 3996 wrote to memory of 2896	3996	2025-01-13_af2bf1938e054d716d7c0c2ec40e7f7b_mafia.exe	84
PID 3996 wrote to memory of 2896	3996	2025-01-13_af2bf1938e054d716d7c0c2ec40e7f7b_mafia.exe	84
PID 3996 wrote to memory of 2896	3996	2025-01-13_af2bf1938e054d716d7c0c2ec40e7f7b_mafia.exe	84
PID 3996 wrote to memory of 1852	3996	2025-01-13_af2bf1938e054d716d7c0c2ec40e7f7b_mafia.exe	86
PID 3996 wrote to memory of 1852	3996	2025-01-13_af2bf1938e054d716d7c0c2ec40e7f7b_mafia.exe	86
PID 3996 wrote to memory of 1852	3996	2025-01-13_af2bf1938e054d716d7c0c2ec40e7f7b_mafia.exe	86
PID 3996 wrote to memory of 4036	3996	2025-01-13_af2bf1938e054d716d7c0c2ec40e7f7b_mafia.exe	88
PID 3996 wrote to memory of 4036	3996	2025-01-13_af2bf1938e054d716d7c0c2ec40e7f7b_mafia.exe	88
PID 3996 wrote to memory of 4036	3996	2025-01-13_af2bf1938e054d716d7c0c2ec40e7f7b_mafia.exe	88
PID 3996 wrote to memory of 3076	3996	2025-01-13_af2bf1938e054d716d7c0c2ec40e7f7b_mafia.exe	90
PID 3996 wrote to memory of 3076	3996	2025-01-13_af2bf1938e054d716d7c0c2ec40e7f7b_mafia.exe	90
PID 3996 wrote to memory of 3076	3996	2025-01-13_af2bf1938e054d716d7c0c2ec40e7f7b_mafia.exe	90
PID 3996 wrote to memory of 2152	3996	2025-01-13_af2bf1938e054d716d7c0c2ec40e7f7b_mafia.exe	92
PID 3996 wrote to memory of 2152	3996	2025-01-13_af2bf1938e054d716d7c0c2ec40e7f7b_mafia.exe	92
PID 3996 wrote to memory of 2152	3996	2025-01-13_af2bf1938e054d716d7c0c2ec40e7f7b_mafia.exe	92
PID 3996 wrote to memory of 4816	3996	2025-01-13_af2bf1938e054d716d7c0c2ec40e7f7b_mafia.exe	95
PID 3996 wrote to memory of 4816	3996	2025-01-13_af2bf1938e054d716d7c0c2ec40e7f7b_mafia.exe	95
PID 3996 wrote to memory of 4816	3996	2025-01-13_af2bf1938e054d716d7c0c2ec40e7f7b_mafia.exe	95
PID 1884 wrote to memory of 3184	1884	vxsyreo.exe	106
PID 1884 wrote to memory of 3184	1884	vxsyreo.exe	106
PID 1884 wrote to memory of 3184	1884	vxsyreo.exe	106
PID 1884 wrote to memory of 3184	1884	vxsyreo.exe	106
PID 1884 wrote to memory of 3184	1884	vxsyreo.exe	106

C:\Users\Admin\AppData\Local\Temp\2025-01-13_af2bf1938e054d716d7c0c2ec40e7f7b_mafia.exe
"C:\Users\Admin\AppData\Local\Temp\2025-01-13_af2bf1938e054d716d7c0c2ec40e7f7b_mafia.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3996
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\fufbjxyd\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2896
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\vxsyreo.exe" C:\Windows\SysWOW64\fufbjxyd\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:1852
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create fufbjxyd binPath= "C:\Windows\SysWOW64\fufbjxyd\vxsyreo.exe /d\"C:\Users\Admin\AppData\Local\Temp\2025-01-13_af2bf1938e054d716d7c0c2ec40e7f7b_mafia.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4036
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description fufbjxyd "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3076
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start fufbjxyd
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2152
- 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:4816
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3996 -s 1036
  2⤵
  - Program crash
  PID:3212

C:\Windows\SysWOW64\fufbjxyd\vxsyreo.exe
C:\Windows\SysWOW64\fufbjxyd\vxsyreo.exe /d"C:\Users\Admin\AppData\Local\Temp\2025-01-13_af2bf1938e054d716d7c0c2ec40e7f7b_mafia.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1884
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:3184
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1884 -s 512
  2⤵
  - Program crash
  PID:1588

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 3996 -ip 3996
1⤵
PID:4784

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 524 -p 1884 -ip 1884
1⤵
PID:1776

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

System Services

1

T1569

Service Execution

1

T1569.002

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Create or Modify System Process

2

T1543

Windows Service

2

T1543.003

Event Triggered Execution

1

T1546

Netsh Helper DLL

1

T1546.007

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Create or Modify System Process

2

T1543

Windows Service

2

T1543.003

Event Triggered Execution

1

T1546

Netsh Helper DLL

1

T1546.007

Defense Evasion

Impair Defenses

1

T1562

Disable or Modify System Firewall

Modify Registry

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

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

Filesize
12.3MB

MD5
ff450ee9556ab5b765332408f8092aa4

SHA1
1f4572f5dde873275d5da2ac5817140bf261425b

SHA256
01d7548d88eac55457f7936aa05604d46b80679b43a5ce2f341af74e17028f61

SHA512
28eb39b8ac5490114bf5528d9958fc42f4a1ce5f4a3c2821339d6190d168a870f6d5729072b2d7edd0d0a9bc69aa80516618c0b6d422c948d76db22fcf58a9af

Download Submit
memory/1884-13-0x0000000000400000-0x000000000044F000-memory.dmp

Filesize
316KB

Download
memory/1884-11-0x0000000000400000-0x000000000044F000-memory.dmp

Filesize
316KB

Download
memory/1884-12-0x0000000000400000-0x000000000044F000-memory.dmp

Filesize
316KB

Download
memory/1884-18-0x0000000000400000-0x000000000044F000-memory.dmp

Filesize
316KB

Download
memory/3184-14-0x0000000000E50000-0x0000000000E65000-memory.dmp

Filesize
84KB

Download
memory/3184-16-0x0000000000E50000-0x0000000000E65000-memory.dmp

Filesize
84KB

Download
memory/3184-19-0x0000000000E50000-0x0000000000E65000-memory.dmp

Filesize
84KB

Download
memory/3996-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/3996-2-0x0000000000490000-0x00000000004A3000-memory.dmp

Filesize
76KB

Download
memory/3996-8-0x0000000000490000-0x00000000004A3000-memory.dmp

Filesize
76KB

Download
memory/3996-9-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/3996-7-0x0000000000400000-0x000000000044F000-memory.dmp

Filesize
316KB

Download
memory/3996-1-0x00000000005F0000-0x00000000006F0000-memory.dmp

Filesize
1024KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads