tofsee | 3576d8e57c835f522ebaa917700dbabecc817dcdc7b4d21d2b155e7fe4977455

General

Target

3576d8e57c835f522ebaa917700dbabecc817dcdc7b4d21d2b155e7fe4977455.exe
Size

104KB
MD5

67260c5c5215244985a54f8c8092bc8d
SHA1

5d8c9edaee2219781a8488f21fdb1e193b8dc8a6
SHA256

3576d8e57c835f522ebaa917700dbabecc817dcdc7b4d21d2b155e7fe4977455
SHA512

f31c7f275b42366eed39d5517be6a406645929c92bc6a471a1ebbc83ed1318c0c23982dca33b3351fd2088a335b213ef3db45fa6ba025c00b13a5427ae13e2df

Score

10^/10

tofsee evasion persistence 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
Creates new service(s) 1 TTPs
persistence

New Service
T1050
Executes dropped EXE 1 IoCs

Processes:

nlsonwul.exe

pid process

4560 nlsonwul.exe
Modifies Windows Firewall 1 TTPs 1 IoCs
evasion

Modify Existing Service
T1031

Processes:

netsh.exe

pid process

2140 netsh.exe

pid	process
4560	nlsonwul.exe

pid	process
2140	netsh.exe

Sets service image path in registry 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

svchost.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\xngfiiku\ImagePath = "C:\\Windows\\SysWOW64\\xngfiiku\\nlsonwul.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

Processes:

3576d8e57c835f522ebaa917700dbabecc817dcdc7b4d21d2b155e7fe4977455.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1081944012-3634099177-1681222835-1000\Control Panel\International\Geo\Nation	3576d8e57c835f522ebaa917700dbabecc817dcdc7b4d21d2b155e7fe4977455.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

nlsonwul.exe

description pid process target process

PID 4560 set thread context of 2364 4560 nlsonwul.exe svchost.exe
Launches sc.exe 3 IoCs
Sc.exe is a Windows utlilty to control services on the system.

Processes:

sc.exesc.exesc.exe

pid process

1664 sc.exe
3532 sc.exe
4228 sc.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

description	pid	process	target process
PID 4560 set thread context of 2364	4560	nlsonwul.exe	svchost.exe

pid	process
1664	sc.exe
3532	sc.exe
4228	sc.exe

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

3576d8e57c835f522ebaa917700dbabecc817dcdc7b4d21d2b155e7fe4977455.exenlsonwul.exe

description	pid	process	target process
PID 4060 wrote to memory of 2636	4060	3576d8e57c835f522ebaa917700dbabecc817dcdc7b4d21d2b155e7fe4977455.exe	cmd.exe
PID 4060 wrote to memory of 2636	4060	3576d8e57c835f522ebaa917700dbabecc817dcdc7b4d21d2b155e7fe4977455.exe	cmd.exe
PID 4060 wrote to memory of 2636	4060	3576d8e57c835f522ebaa917700dbabecc817dcdc7b4d21d2b155e7fe4977455.exe	cmd.exe
PID 4060 wrote to memory of 3508	4060	3576d8e57c835f522ebaa917700dbabecc817dcdc7b4d21d2b155e7fe4977455.exe	cmd.exe
PID 4060 wrote to memory of 3508	4060	3576d8e57c835f522ebaa917700dbabecc817dcdc7b4d21d2b155e7fe4977455.exe	cmd.exe
PID 4060 wrote to memory of 3508	4060	3576d8e57c835f522ebaa917700dbabecc817dcdc7b4d21d2b155e7fe4977455.exe	cmd.exe
PID 4060 wrote to memory of 4228	4060	3576d8e57c835f522ebaa917700dbabecc817dcdc7b4d21d2b155e7fe4977455.exe	sc.exe
PID 4060 wrote to memory of 4228	4060	3576d8e57c835f522ebaa917700dbabecc817dcdc7b4d21d2b155e7fe4977455.exe	sc.exe
PID 4060 wrote to memory of 4228	4060	3576d8e57c835f522ebaa917700dbabecc817dcdc7b4d21d2b155e7fe4977455.exe	sc.exe
PID 4060 wrote to memory of 1664	4060	3576d8e57c835f522ebaa917700dbabecc817dcdc7b4d21d2b155e7fe4977455.exe	sc.exe
PID 4060 wrote to memory of 1664	4060	3576d8e57c835f522ebaa917700dbabecc817dcdc7b4d21d2b155e7fe4977455.exe	sc.exe
PID 4060 wrote to memory of 1664	4060	3576d8e57c835f522ebaa917700dbabecc817dcdc7b4d21d2b155e7fe4977455.exe	sc.exe
PID 4060 wrote to memory of 3532	4060	3576d8e57c835f522ebaa917700dbabecc817dcdc7b4d21d2b155e7fe4977455.exe	sc.exe
PID 4060 wrote to memory of 3532	4060	3576d8e57c835f522ebaa917700dbabecc817dcdc7b4d21d2b155e7fe4977455.exe	sc.exe
PID 4060 wrote to memory of 3532	4060	3576d8e57c835f522ebaa917700dbabecc817dcdc7b4d21d2b155e7fe4977455.exe	sc.exe
PID 4060 wrote to memory of 2140	4060	3576d8e57c835f522ebaa917700dbabecc817dcdc7b4d21d2b155e7fe4977455.exe	netsh.exe
PID 4060 wrote to memory of 2140	4060	3576d8e57c835f522ebaa917700dbabecc817dcdc7b4d21d2b155e7fe4977455.exe	netsh.exe
PID 4060 wrote to memory of 2140	4060	3576d8e57c835f522ebaa917700dbabecc817dcdc7b4d21d2b155e7fe4977455.exe	netsh.exe
PID 4560 wrote to memory of 2364	4560	nlsonwul.exe	svchost.exe
PID 4560 wrote to memory of 2364	4560	nlsonwul.exe	svchost.exe
PID 4560 wrote to memory of 2364	4560	nlsonwul.exe	svchost.exe
PID 4560 wrote to memory of 2364	4560	nlsonwul.exe	svchost.exe
PID 4560 wrote to memory of 2364	4560	nlsonwul.exe	svchost.exe

C:\Users\Admin\AppData\Local\Temp\3576d8e57c835f522ebaa917700dbabecc817dcdc7b4d21d2b155e7fe4977455.exe
"C:\Users\Admin\AppData\Local\Temp\3576d8e57c835f522ebaa917700dbabecc817dcdc7b4d21d2b155e7fe4977455.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4060

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\xngfiiku\
2⤵
PID:2636

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\nlsonwul.exe" C:\Windows\SysWOW64\xngfiiku\
2⤵
PID:3508

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create xngfiiku binPath= "C:\Windows\SysWOW64\xngfiiku\nlsonwul.exe /d\"C:\Users\Admin\AppData\Local\Temp\3576d8e57c835f522ebaa917700dbabecc817dcdc7b4d21d2b155e7fe4977455.exe\"" type= own start= auto DisplayName= "wifi support"
2⤵
- Launches sc.exe
PID:4228

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description xngfiiku "wifi internet conection"
2⤵
- Launches sc.exe
PID:1664

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start xngfiiku
2⤵
- Launches sc.exe
PID:3532

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
PID:2140

C:\Windows\SysWOW64\xngfiiku\nlsonwul.exe
C:\Windows\SysWOW64\xngfiiku\nlsonwul.exe /d"C:\Users\Admin\AppData\Local\Temp\3576d8e57c835f522ebaa917700dbabecc817dcdc7b4d21d2b155e7fe4977455.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4560

C:\Windows\SysWOW64\svchost.exe
svchost.exe
2⤵
- Sets service image path in registry
PID:2364

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

New Service

1

T1050

Modify Existing Service

1

T1031

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

New Service

1

T1050

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\nlsonwul.exe
Filesize
13.6MB

MD5
70a6dc63429eac823590883e372e1c58

SHA1
b225cf4241c2b5d5e1eb781c615d334134c40f80

SHA256
a10a11a3648fac2d3eb17917cac3b10eca8db938a4356783366a3e6322813b07

SHA512
b5d20fb3a2dd741926df0945a90ad06360833c9e41681f2dc91dc105a103b36e29d8b9337cc1f77e9c4defee45cf2b5836c49be9c8ba01d08b1f96bbd13ee865

Download Submit
C:\Windows\SysWOW64\xngfiiku\nlsonwul.exe
Filesize
13.6MB

MD5
70a6dc63429eac823590883e372e1c58

SHA1
b225cf4241c2b5d5e1eb781c615d334134c40f80

SHA256
a10a11a3648fac2d3eb17917cac3b10eca8db938a4356783366a3e6322813b07

SHA512
b5d20fb3a2dd741926df0945a90ad06360833c9e41681f2dc91dc105a103b36e29d8b9337cc1f77e9c4defee45cf2b5836c49be9c8ba01d08b1f96bbd13ee865

Download Submit
memory/1664-135-0x0000000000000000-mapping.dmp

Download
memory/2140-137-0x0000000000000000-mapping.dmp

Download
memory/2364-141-0x0000000000B90000-0x0000000000BA5000-memory.dmp

Filesize
84KB

Download
memory/2364-145-0x0000000000B90000-0x0000000000BA5000-memory.dmp

Filesize
84KB

Download
memory/2364-144-0x0000000000B90000-0x0000000000BA5000-memory.dmp

Filesize
84KB

Download
memory/2364-143-0x0000000000B90000-0x0000000000BA5000-memory.dmp

Filesize
84KB

Download
memory/2364-140-0x0000000000000000-mapping.dmp

Download
memory/2636-131-0x0000000000000000-mapping.dmp

Download
memory/3508-132-0x0000000000000000-mapping.dmp

Download
memory/3532-136-0x0000000000000000-mapping.dmp

Download
memory/4060-130-0x0000000000400000-0x000000000041D000-memory.dmp

Filesize
116KB

Download
memory/4228-134-0x0000000000000000-mapping.dmp

Download
memory/4560-139-0x0000000000400000-0x000000000041D000-memory.dmp

Filesize
116KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads