tofsee | c1dd5abe327d73b5152cb7a0d0bca205d6808981e25fc469f9c0118e313e4987

Analysis

max time kernel
144s
max time network
121s
platform
windows7_x64
resource
win7-20240708-en
resource tags

arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
submitted
01-02-2025 02:04

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General

Target

2025-02-01_5dc90b4af645432c2a130c25b4348f4f_mafia.exe
Size

14.7MB
MD5

5dc90b4af645432c2a130c25b4348f4f
SHA1

25e4153df22e92c64d53ac7f1cde48fbf964ac5a
SHA256

c1dd5abe327d73b5152cb7a0d0bca205d6808981e25fc469f9c0118e313e4987
SHA512

f406f0adecb584f783ee8eebe805fc6dfe6190d22e46c483de3b82f65a35af0803a37ab91cd838d965afc01c14a380209fa15fc5b9a99935cb97c7fc8ba3b00c
SSDEEP

24576:cpomTTN9tttttttttttttttttttttttttttttttttttttttttttttttttttttttn:4oo

Score

10^/10

tofsee defense_evasion discovery 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

defense_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\fisotnxz = "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

defense_evasion

Windows Service

T1543.003

Disable or Modify System Firewall

T1562.004

pid	Process
1220	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\fisotnxz\ImagePath = "C:\\Windows\\SysWOW64\\fisotnxz\\srfhvstl.exe"	svchost.exe

Deletes itself 1 IoCs

pid	Process
2580	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2668	srfhvstl.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2668 set thread context of 2580	2668	srfhvstl.exe	43

Launches sc.exe 3 IoCs

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

pid	Process
2664	sc.exe
2528	sc.exe
2636	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	2025-02-01_5dc90b4af645432c2a130c25b4348f4f_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	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	netsh.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	srfhvstl.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 2428 wrote to memory of 2748	2428	2025-02-01_5dc90b4af645432c2a130c25b4348f4f_mafia.exe	30
PID 2428 wrote to memory of 2748	2428	2025-02-01_5dc90b4af645432c2a130c25b4348f4f_mafia.exe	30
PID 2428 wrote to memory of 2748	2428	2025-02-01_5dc90b4af645432c2a130c25b4348f4f_mafia.exe	30
PID 2428 wrote to memory of 2748	2428	2025-02-01_5dc90b4af645432c2a130c25b4348f4f_mafia.exe	30
PID 2428 wrote to memory of 2608	2428	2025-02-01_5dc90b4af645432c2a130c25b4348f4f_mafia.exe	32
PID 2428 wrote to memory of 2608	2428	2025-02-01_5dc90b4af645432c2a130c25b4348f4f_mafia.exe	32
PID 2428 wrote to memory of 2608	2428	2025-02-01_5dc90b4af645432c2a130c25b4348f4f_mafia.exe	32
PID 2428 wrote to memory of 2608	2428	2025-02-01_5dc90b4af645432c2a130c25b4348f4f_mafia.exe	32
PID 2428 wrote to memory of 2636	2428	2025-02-01_5dc90b4af645432c2a130c25b4348f4f_mafia.exe	34
PID 2428 wrote to memory of 2636	2428	2025-02-01_5dc90b4af645432c2a130c25b4348f4f_mafia.exe	34
PID 2428 wrote to memory of 2636	2428	2025-02-01_5dc90b4af645432c2a130c25b4348f4f_mafia.exe	34
PID 2428 wrote to memory of 2636	2428	2025-02-01_5dc90b4af645432c2a130c25b4348f4f_mafia.exe	34
PID 2428 wrote to memory of 2664	2428	2025-02-01_5dc90b4af645432c2a130c25b4348f4f_mafia.exe	36
PID 2428 wrote to memory of 2664	2428	2025-02-01_5dc90b4af645432c2a130c25b4348f4f_mafia.exe	36
PID 2428 wrote to memory of 2664	2428	2025-02-01_5dc90b4af645432c2a130c25b4348f4f_mafia.exe	36
PID 2428 wrote to memory of 2664	2428	2025-02-01_5dc90b4af645432c2a130c25b4348f4f_mafia.exe	36
PID 2428 wrote to memory of 2528	2428	2025-02-01_5dc90b4af645432c2a130c25b4348f4f_mafia.exe	38
PID 2428 wrote to memory of 2528	2428	2025-02-01_5dc90b4af645432c2a130c25b4348f4f_mafia.exe	38
PID 2428 wrote to memory of 2528	2428	2025-02-01_5dc90b4af645432c2a130c25b4348f4f_mafia.exe	38
PID 2428 wrote to memory of 2528	2428	2025-02-01_5dc90b4af645432c2a130c25b4348f4f_mafia.exe	38
PID 2428 wrote to memory of 1220	2428	2025-02-01_5dc90b4af645432c2a130c25b4348f4f_mafia.exe	41
PID 2428 wrote to memory of 1220	2428	2025-02-01_5dc90b4af645432c2a130c25b4348f4f_mafia.exe	41
PID 2428 wrote to memory of 1220	2428	2025-02-01_5dc90b4af645432c2a130c25b4348f4f_mafia.exe	41
PID 2428 wrote to memory of 1220	2428	2025-02-01_5dc90b4af645432c2a130c25b4348f4f_mafia.exe	41
PID 2668 wrote to memory of 2580	2668	srfhvstl.exe	43
PID 2668 wrote to memory of 2580	2668	srfhvstl.exe	43
PID 2668 wrote to memory of 2580	2668	srfhvstl.exe	43
PID 2668 wrote to memory of 2580	2668	srfhvstl.exe	43
PID 2668 wrote to memory of 2580	2668	srfhvstl.exe	43
PID 2668 wrote to memory of 2580	2668	srfhvstl.exe	43

C:\Users\Admin\AppData\Local\Temp\2025-02-01_5dc90b4af645432c2a130c25b4348f4f_mafia.exe
"C:\Users\Admin\AppData\Local\Temp\2025-02-01_5dc90b4af645432c2a130c25b4348f4f_mafia.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2428
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\fisotnxz\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2748
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\srfhvstl.exe" C:\Windows\SysWOW64\fisotnxz\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2608
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create fisotnxz binPath= "C:\Windows\SysWOW64\fisotnxz\srfhvstl.exe /d\"C:\Users\Admin\AppData\Local\Temp\2025-02-01_5dc90b4af645432c2a130c25b4348f4f_mafia.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2636
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description fisotnxz "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2664
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start fisotnxz
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2528
- 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:1220

C:\Windows\SysWOW64\fisotnxz\srfhvstl.exe
C:\Windows\SysWOW64\fisotnxz\srfhvstl.exe /d"C:\Users\Admin\AppData\Local\Temp\2025-02-01_5dc90b4af645432c2a130c25b4348f4f_mafia.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2668
- 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:2580

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\srfhvstl.exe

Filesize
13.6MB

MD5
a8c1c593d630a0bfa5378ce57a912489

SHA1
b36e5183a0bb250abe802483621cb439cc5b1d88

SHA256
09d0d0467f93f111dd908c7059cd0164a4ace3ecc58f45e4cde0f28e913e8130

SHA512
daeb183264b3279699292d162e4d3ae20f7a4e65d0d5a2f774be8929f0ba72d3c296018430de69ac2bb6a642792c60fbcb2ccb49a65411e6a578470f3275f7c6

Download Submit
memory/2428-7-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/2428-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2428-1-0x0000000000530000-0x0000000000630000-memory.dmp

Filesize
1024KB

Download
memory/2428-9-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2428-8-0x0000000000020000-0x0000000000033000-memory.dmp

Filesize
76KB

Download
memory/2428-2-0x0000000000020000-0x0000000000033000-memory.dmp

Filesize
76KB

Download
memory/2580-11-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2580-14-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2580-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2580-17-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2580-18-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2668-15-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads