tofsee | f993bfec5e0f7dd1be181f7175216c8d26e44abd70f4e4b2bfb87cd09eec6d38

General

Target

2025-01-17_4cf474253898fc3a91d8ec57036f89ba_mafia.exe
Size

10.4MB
MD5

4cf474253898fc3a91d8ec57036f89ba
SHA1

b5de92102717aa551166a5f5c13bf25ff868044e
SHA256

f993bfec5e0f7dd1be181f7175216c8d26e44abd70f4e4b2bfb87cd09eec6d38
SHA512

0f0116a7d75955d9194fb9032a70122f0ab0487b2c56e4321dde7057dcf5763c21e675985be80e986dffd21e5b24b515739ca440510be4710793abcba8f76c57
SSDEEP

24576:opomTTN9ttttttttttttttttttttttttttttttttttttttttttttttttttttttt3:Eoo

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
1948	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\zjyvxxj\ImagePath = "C:\\Windows\\SysWOW64\\zjyvxxj\\ucrvigpp.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-1-5-21-2045521122-590294423-3465680274-1000\Control Panel\International\Geo\Nation	2025-01-17_4cf474253898fc3a91d8ec57036f89ba_mafia.exe

Deletes itself 1 IoCs

pid	Process
5024	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
232	ucrvigpp.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 232 set thread context of 5024	232	ucrvigpp.exe	108

Launches sc.exe 3 IoCs

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

pid	Process
4404	sc.exe
2332	sc.exe
4896	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
1544	2340	WerFault.exe	84
4884	232	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	2025-01-17_4cf474253898fc3a91d8ec57036f89ba_mafia.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	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	ucrvigpp.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 2340 wrote to memory of 3148	2340	2025-01-17_4cf474253898fc3a91d8ec57036f89ba_mafia.exe	86
PID 2340 wrote to memory of 3148	2340	2025-01-17_4cf474253898fc3a91d8ec57036f89ba_mafia.exe	86
PID 2340 wrote to memory of 3148	2340	2025-01-17_4cf474253898fc3a91d8ec57036f89ba_mafia.exe	86
PID 2340 wrote to memory of 668	2340	2025-01-17_4cf474253898fc3a91d8ec57036f89ba_mafia.exe	88
PID 2340 wrote to memory of 668	2340	2025-01-17_4cf474253898fc3a91d8ec57036f89ba_mafia.exe	88
PID 2340 wrote to memory of 668	2340	2025-01-17_4cf474253898fc3a91d8ec57036f89ba_mafia.exe	88
PID 2340 wrote to memory of 4404	2340	2025-01-17_4cf474253898fc3a91d8ec57036f89ba_mafia.exe	90
PID 2340 wrote to memory of 4404	2340	2025-01-17_4cf474253898fc3a91d8ec57036f89ba_mafia.exe	90
PID 2340 wrote to memory of 4404	2340	2025-01-17_4cf474253898fc3a91d8ec57036f89ba_mafia.exe	90
PID 2340 wrote to memory of 2332	2340	2025-01-17_4cf474253898fc3a91d8ec57036f89ba_mafia.exe	92
PID 2340 wrote to memory of 2332	2340	2025-01-17_4cf474253898fc3a91d8ec57036f89ba_mafia.exe	92
PID 2340 wrote to memory of 2332	2340	2025-01-17_4cf474253898fc3a91d8ec57036f89ba_mafia.exe	92
PID 2340 wrote to memory of 4896	2340	2025-01-17_4cf474253898fc3a91d8ec57036f89ba_mafia.exe	94
PID 2340 wrote to memory of 4896	2340	2025-01-17_4cf474253898fc3a91d8ec57036f89ba_mafia.exe	94
PID 2340 wrote to memory of 4896	2340	2025-01-17_4cf474253898fc3a91d8ec57036f89ba_mafia.exe	94
PID 2340 wrote to memory of 1948	2340	2025-01-17_4cf474253898fc3a91d8ec57036f89ba_mafia.exe	97
PID 2340 wrote to memory of 1948	2340	2025-01-17_4cf474253898fc3a91d8ec57036f89ba_mafia.exe	97
PID 2340 wrote to memory of 1948	2340	2025-01-17_4cf474253898fc3a91d8ec57036f89ba_mafia.exe	97
PID 232 wrote to memory of 5024	232	ucrvigpp.exe	108
PID 232 wrote to memory of 5024	232	ucrvigpp.exe	108
PID 232 wrote to memory of 5024	232	ucrvigpp.exe	108
PID 232 wrote to memory of 5024	232	ucrvigpp.exe	108
PID 232 wrote to memory of 5024	232	ucrvigpp.exe	108

C:\Users\Admin\AppData\Local\Temp\2025-01-17_4cf474253898fc3a91d8ec57036f89ba_mafia.exe
"C:\Users\Admin\AppData\Local\Temp\2025-01-17_4cf474253898fc3a91d8ec57036f89ba_mafia.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2340
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\zjyvxxj\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:3148
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\ucrvigpp.exe" C:\Windows\SysWOW64\zjyvxxj\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:668
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create zjyvxxj binPath= "C:\Windows\SysWOW64\zjyvxxj\ucrvigpp.exe /d\"C:\Users\Admin\AppData\Local\Temp\2025-01-17_4cf474253898fc3a91d8ec57036f89ba_mafia.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4404
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description zjyvxxj "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2332
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start zjyvxxj
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4896
- 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:1948
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2340 -s 1044
  2⤵
  - Program crash
  PID:1544

C:\Windows\SysWOW64\zjyvxxj\ucrvigpp.exe
C:\Windows\SysWOW64\zjyvxxj\ucrvigpp.exe /d"C:\Users\Admin\AppData\Local\Temp\2025-01-17_4cf474253898fc3a91d8ec57036f89ba_mafia.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:232
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:5024
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 232 -s 520
  2⤵
  - Program crash
  PID:4884

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 2340 -ip 2340
1⤵
PID:3648

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 496 -p 232 -ip 232
1⤵
PID:4228

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\ucrvigpp.exe

Filesize
13.7MB

MD5
5a6526fd0319dfe84b84af7db2709ae7

SHA1
86c63ab02d7f3f9a162e080098e040f2be40af45

SHA256
62a2f0897c822f91451ebabc193d058967ffcf79cf1e6faa7616750058898281

SHA512
2a68d9ba6d5bebb0477843729b516947bbea95a2a5ea0be3df625975414f3411c93a88ad3bb94aa4a703732545b04fc5f374fbe4accdaf67267542a64a88ee74

Download Submit
memory/232-13-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/232-11-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/232-12-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/232-19-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/2340-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2340-2-0x00000000001C0000-0x00000000001D3000-memory.dmp

Filesize
76KB

Download
memory/2340-7-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/2340-8-0x00000000001C0000-0x00000000001D3000-memory.dmp

Filesize
76KB

Download
memory/2340-9-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2340-1-0x00000000005C0000-0x00000000006C0000-memory.dmp

Filesize
1024KB

Download
memory/5024-14-0x0000000000340000-0x0000000000355000-memory.dmp

Filesize
84KB

Download
memory/5024-16-0x0000000000340000-0x0000000000355000-memory.dmp

Filesize
84KB

Download
memory/5024-17-0x0000000000340000-0x0000000000355000-memory.dmp

Filesize
84KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads