tofsee | ed3d51d8d09ff9f79b03d40fb912639f24094280abbf068d861780b5a440545e

General

Target

2025-01-13_8f99b8d69deb167959d1393683ef98cf_mafia.exe
Size

12.7MB
MD5

8f99b8d69deb167959d1393683ef98cf
SHA1

6de38f45f39789d19b16585de4253305bd7fe37f
SHA256

ed3d51d8d09ff9f79b03d40fb912639f24094280abbf068d861780b5a440545e
SHA512

dbbe11ee848813339c5f3652d934f33348277e43ad5f5e0bcfb0cf9091a163999b40f140a1b49629ba936cf979f4ed42299931eaf440ac780e4f0ade70f05e1b
SSDEEP

24576:UpomTTN9ttttttttttttttttttttttttttttttttttttttttttttttttttttttt3:goo

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
3128	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\pjeyqvpk\ImagePath = "C:\\Windows\\SysWOW64\\pjeyqvpk\\vuikyvwo.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	2025-01-13_8f99b8d69deb167959d1393683ef98cf_mafia.exe

Deletes itself 1 IoCs

pid	Process
2792	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
4208	vuikyvwo.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4208 set thread context of 2792	4208	vuikyvwo.exe	101

Launches sc.exe 3 IoCs

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

pid	Process
4564	sc.exe
3840	sc.exe
4044	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 queried	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe
Key value enumerated	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe
Key opened	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe

Program crash 2 IoCs

pid	pid_target	Process	procid_target
4484	3276	WerFault.exe	82
2224	4208	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_8f99b8d69deb167959d1393683ef98cf_mafia.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	netsh.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	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	vuikyvwo.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 3276 wrote to memory of 4380	3276	2025-01-13_8f99b8d69deb167959d1393683ef98cf_mafia.exe	84
PID 3276 wrote to memory of 4380	3276	2025-01-13_8f99b8d69deb167959d1393683ef98cf_mafia.exe	84
PID 3276 wrote to memory of 4380	3276	2025-01-13_8f99b8d69deb167959d1393683ef98cf_mafia.exe	84
PID 3276 wrote to memory of 1076	3276	2025-01-13_8f99b8d69deb167959d1393683ef98cf_mafia.exe	86
PID 3276 wrote to memory of 1076	3276	2025-01-13_8f99b8d69deb167959d1393683ef98cf_mafia.exe	86
PID 3276 wrote to memory of 1076	3276	2025-01-13_8f99b8d69deb167959d1393683ef98cf_mafia.exe	86
PID 3276 wrote to memory of 4564	3276	2025-01-13_8f99b8d69deb167959d1393683ef98cf_mafia.exe	88
PID 3276 wrote to memory of 4564	3276	2025-01-13_8f99b8d69deb167959d1393683ef98cf_mafia.exe	88
PID 3276 wrote to memory of 4564	3276	2025-01-13_8f99b8d69deb167959d1393683ef98cf_mafia.exe	88
PID 3276 wrote to memory of 3840	3276	2025-01-13_8f99b8d69deb167959d1393683ef98cf_mafia.exe	90
PID 3276 wrote to memory of 3840	3276	2025-01-13_8f99b8d69deb167959d1393683ef98cf_mafia.exe	90
PID 3276 wrote to memory of 3840	3276	2025-01-13_8f99b8d69deb167959d1393683ef98cf_mafia.exe	90
PID 3276 wrote to memory of 4044	3276	2025-01-13_8f99b8d69deb167959d1393683ef98cf_mafia.exe	92
PID 3276 wrote to memory of 4044	3276	2025-01-13_8f99b8d69deb167959d1393683ef98cf_mafia.exe	92
PID 3276 wrote to memory of 4044	3276	2025-01-13_8f99b8d69deb167959d1393683ef98cf_mafia.exe	92
PID 3276 wrote to memory of 3128	3276	2025-01-13_8f99b8d69deb167959d1393683ef98cf_mafia.exe	95
PID 3276 wrote to memory of 3128	3276	2025-01-13_8f99b8d69deb167959d1393683ef98cf_mafia.exe	95
PID 3276 wrote to memory of 3128	3276	2025-01-13_8f99b8d69deb167959d1393683ef98cf_mafia.exe	95
PID 4208 wrote to memory of 2792	4208	vuikyvwo.exe	101
PID 4208 wrote to memory of 2792	4208	vuikyvwo.exe	101
PID 4208 wrote to memory of 2792	4208	vuikyvwo.exe	101
PID 4208 wrote to memory of 2792	4208	vuikyvwo.exe	101
PID 4208 wrote to memory of 2792	4208	vuikyvwo.exe	101

C:\Users\Admin\AppData\Local\Temp\2025-01-13_8f99b8d69deb167959d1393683ef98cf_mafia.exe
"C:\Users\Admin\AppData\Local\Temp\2025-01-13_8f99b8d69deb167959d1393683ef98cf_mafia.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3276
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\pjeyqvpk\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4380
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\vuikyvwo.exe" C:\Windows\SysWOW64\pjeyqvpk\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:1076
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create pjeyqvpk binPath= "C:\Windows\SysWOW64\pjeyqvpk\vuikyvwo.exe /d\"C:\Users\Admin\AppData\Local\Temp\2025-01-13_8f99b8d69deb167959d1393683ef98cf_mafia.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4564
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description pjeyqvpk "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3840
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start pjeyqvpk
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4044
- 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:3128
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3276 -s 1240
  2⤵
  - Program crash
  PID:4484

C:\Windows\SysWOW64\pjeyqvpk\vuikyvwo.exe
C:\Windows\SysWOW64\pjeyqvpk\vuikyvwo.exe /d"C:\Users\Admin\AppData\Local\Temp\2025-01-13_8f99b8d69deb167959d1393683ef98cf_mafia.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4208
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:2792
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4208 -s 532
  2⤵
  - Program crash
  PID:2224

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 3276 -ip 3276
1⤵
PID:4924

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 448 -p 4208 -ip 4208
1⤵
PID:2548

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\vuikyvwo.exe

Filesize
11.6MB

MD5
935a4ed785fbc44cf7d457b321436aa7

SHA1
3d1789d6f685bb3059bca13949b3152bd9161e8d

SHA256
ffd44d3565fa4de951357c4856294f9eb97f834b85c0237b5914f3bbc5d11eb1

SHA512
2ecebcbcdad74fd512a6d55bf02db6e93728af755026e5382d56f2ba0354aa56f50499f69ea39f0a3c60c6362e4794b8c6197f640ddb5d389e00439321454e9c

Download Submit
memory/2792-14-0x00000000010F0000-0x0000000001105000-memory.dmp

Filesize
84KB

Download
memory/2792-17-0x00000000010F0000-0x0000000001105000-memory.dmp

Filesize
84KB

Download
memory/2792-16-0x00000000010F0000-0x0000000001105000-memory.dmp

Filesize
84KB

Download
memory/3276-9-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/3276-7-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/3276-1-0x0000000000480000-0x0000000000580000-memory.dmp

Filesize
1024KB

Download
memory/3276-8-0x0000000000450000-0x0000000000463000-memory.dmp

Filesize
76KB

Download
memory/3276-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/3276-2-0x0000000000450000-0x0000000000463000-memory.dmp

Filesize
76KB

Download
memory/4208-12-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/4208-11-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/4208-13-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/4208-18-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads