tofsee | e7913e2c847ac4473585f47cc1704415162535c27ea5b99795cc89142548c59c

General

Target

2025-02-01_5feeb78b75274e5678569bbc9ad05218_mafia.exe
Size

11.9MB
MD5

5feeb78b75274e5678569bbc9ad05218
SHA1

0f7f76c3a85f5e4c6cffc2d9ac9161cea10b17b0
SHA256

e7913e2c847ac4473585f47cc1704415162535c27ea5b99795cc89142548c59c
SHA512

9576c7359ab39129046f73cd7c45e8350e7732c0ea964f1e629c17c6b5a20cd24982eb694e7e3a0e240149edef80f57b72601ddd7fb88f95ed84490d11752656
SSDEEP

3072:HLBgXOXcdW8tar7vGdq8c7YMl2b8anmMXnb58XuDP9het3Zv1oSW1za2E+w5C2/i:eOMdRQr7OB0ypmMXnl8XEPM3noSWOCV

Score

10^/10

tofsee defense_evasion discovery 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

defense_evasion

Windows Service

T1543.003

Disable or Modify System Firewall

T1562.004

pid	Process
4208	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\denrpamx\ImagePath = "C:\\Windows\\SysWOW64\\denrpamx\\sunyfnbr.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-1-5-21-70482961-775596374-3727440602-1000\Control Panel\International\Geo\Nation	2025-02-01_5feeb78b75274e5678569bbc9ad05218_mafia.exe

Deletes itself 1 IoCs

pid	Process
60	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
3256	sunyfnbr.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3256 set thread context of 60	3256	sunyfnbr.exe	102

Launches sc.exe 3 IoCs

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

pid	Process
4416	sc.exe
1900	sc.exe
2416	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

Program crash 2 IoCs

pid	pid_target	Process	procid_target
1108	3396	WerFault.exe	82
1628	3256	WerFault.exe	96

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	sunyfnbr.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2025-02-01_5feeb78b75274e5678569bbc9ad05218_mafia.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	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	netsh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 3396 wrote to memory of 3088	3396	2025-02-01_5feeb78b75274e5678569bbc9ad05218_mafia.exe	86
PID 3396 wrote to memory of 3088	3396	2025-02-01_5feeb78b75274e5678569bbc9ad05218_mafia.exe	86
PID 3396 wrote to memory of 3088	3396	2025-02-01_5feeb78b75274e5678569bbc9ad05218_mafia.exe	86
PID 3396 wrote to memory of 3428	3396	2025-02-01_5feeb78b75274e5678569bbc9ad05218_mafia.exe	88
PID 3396 wrote to memory of 3428	3396	2025-02-01_5feeb78b75274e5678569bbc9ad05218_mafia.exe	88
PID 3396 wrote to memory of 3428	3396	2025-02-01_5feeb78b75274e5678569bbc9ad05218_mafia.exe	88
PID 3396 wrote to memory of 4416	3396	2025-02-01_5feeb78b75274e5678569bbc9ad05218_mafia.exe	90
PID 3396 wrote to memory of 4416	3396	2025-02-01_5feeb78b75274e5678569bbc9ad05218_mafia.exe	90
PID 3396 wrote to memory of 4416	3396	2025-02-01_5feeb78b75274e5678569bbc9ad05218_mafia.exe	90
PID 3396 wrote to memory of 1900	3396	2025-02-01_5feeb78b75274e5678569bbc9ad05218_mafia.exe	92
PID 3396 wrote to memory of 1900	3396	2025-02-01_5feeb78b75274e5678569bbc9ad05218_mafia.exe	92
PID 3396 wrote to memory of 1900	3396	2025-02-01_5feeb78b75274e5678569bbc9ad05218_mafia.exe	92
PID 3396 wrote to memory of 2416	3396	2025-02-01_5feeb78b75274e5678569bbc9ad05218_mafia.exe	94
PID 3396 wrote to memory of 2416	3396	2025-02-01_5feeb78b75274e5678569bbc9ad05218_mafia.exe	94
PID 3396 wrote to memory of 2416	3396	2025-02-01_5feeb78b75274e5678569bbc9ad05218_mafia.exe	94
PID 3396 wrote to memory of 4208	3396	2025-02-01_5feeb78b75274e5678569bbc9ad05218_mafia.exe	97
PID 3396 wrote to memory of 4208	3396	2025-02-01_5feeb78b75274e5678569bbc9ad05218_mafia.exe	97
PID 3396 wrote to memory of 4208	3396	2025-02-01_5feeb78b75274e5678569bbc9ad05218_mafia.exe	97
PID 3256 wrote to memory of 60	3256	sunyfnbr.exe	102
PID 3256 wrote to memory of 60	3256	sunyfnbr.exe	102
PID 3256 wrote to memory of 60	3256	sunyfnbr.exe	102
PID 3256 wrote to memory of 60	3256	sunyfnbr.exe	102
PID 3256 wrote to memory of 60	3256	sunyfnbr.exe	102

C:\Users\Admin\AppData\Local\Temp\2025-02-01_5feeb78b75274e5678569bbc9ad05218_mafia.exe
"C:\Users\Admin\AppData\Local\Temp\2025-02-01_5feeb78b75274e5678569bbc9ad05218_mafia.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3396
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\denrpamx\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:3088
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\sunyfnbr.exe" C:\Windows\SysWOW64\denrpamx\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:3428
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create denrpamx binPath= "C:\Windows\SysWOW64\denrpamx\sunyfnbr.exe /d\"C:\Users\Admin\AppData\Local\Temp\2025-02-01_5feeb78b75274e5678569bbc9ad05218_mafia.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4416
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description denrpamx "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:1900
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start denrpamx
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2416
- 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:4208
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3396 -s 1264
  2⤵
  - Program crash
  PID:1108

C:\Windows\SysWOW64\denrpamx\sunyfnbr.exe
C:\Windows\SysWOW64\denrpamx\sunyfnbr.exe /d"C:\Users\Admin\AppData\Local\Temp\2025-02-01_5feeb78b75274e5678569bbc9ad05218_mafia.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3256
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:60
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3256 -s 508
  2⤵
  - Program crash
  PID:1628

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 3396 -ip 3396
1⤵
PID:2824

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 476 -p 3256 -ip 3256
1⤵
PID:4464

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

Replay Monitor

Loading Replay Monitor...

Downloads

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

Filesize
14.1MB

MD5
9c5080d4746980fd463655687828c31c

SHA1
cca1bb7d60be1c6ac641782bee8dcf89c9aac16c

SHA256
2444f903fa0b70c57fede94fc158c08944fa358239c1f92927e20a0cccb6333a

SHA512
d293bb1393a0864b67b746bd0a5bce25ef85760da4f4bba6b577d105032768a6298daad48411af8bea9c06d5ac57a7ff9ae3a22fbfbfc5de4be863596bbfba9b

Download Submit
memory/60-14-0x0000000000A50000-0x0000000000A65000-memory.dmp

Filesize
84KB

Download
memory/60-17-0x0000000000A50000-0x0000000000A65000-memory.dmp

Filesize
84KB

Download
memory/60-16-0x0000000000A50000-0x0000000000A65000-memory.dmp

Filesize
84KB

Download
memory/3256-13-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/3256-12-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/3256-11-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/3256-18-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/3396-9-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/3396-8-0x0000000000490000-0x00000000004A3000-memory.dmp

Filesize
76KB

Download
memory/3396-2-0x0000000000490000-0x00000000004A3000-memory.dmp

Filesize
76KB

Download
memory/3396-7-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/3396-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/3396-1-0x0000000000540000-0x0000000000640000-memory.dmp

Filesize
1024KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads