tofsee | 23197502be28aab6501b23608fd0f3d82bbf096fd990db91f6bbfc1dc41ff855

General

Target

23197502be28aab6501b23608fd0f3d82bbf096fd990db91f6bbfc1dc41ff855.exe
Size

101KB
MD5

fc3b31c8214d209f6783baedfbfd514b
SHA1

f457e855dea420e7ae69129d1437b31c33b78d25
SHA256

23197502be28aab6501b23608fd0f3d82bbf096fd990db91f6bbfc1dc41ff855
SHA512

6232c34e88c1da8fd9d13cd6c81bce59b7552ade20d2e0df736334ae96f9501eb1e63f4f3dbc207e8096c7e3a2111db2c73067c84b50a6da2a62285c789d7eb4

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:

nwonwimd.exe

pid process

4440 nwonwimd.exe
Modifies Windows Firewall 1 TTPs 1 IoCs
evasion

Modify Existing Service
T1031

Processes:

netsh.exe

pid process

5000 netsh.exe

pid	process
4440	nwonwimd.exe

pid	process
5000	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\lcvvlmhk\ImagePath = "C:\\Windows\\SysWOW64\\lcvvlmhk\\nwonwimd.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:

23197502be28aab6501b23608fd0f3d82bbf096fd990db91f6bbfc1dc41ff855.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3751123196-3323558407-1869646069-1000\Control Panel\International\Geo\Nation	23197502be28aab6501b23608fd0f3d82bbf096fd990db91f6bbfc1dc41ff855.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

nwonwimd.exe

description pid process target process

PID 4440 set thread context of 4376 4440 nwonwimd.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

4940 sc.exe
4896 sc.exe
2052 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 4440 set thread context of 4376	4440	nwonwimd.exe	svchost.exe

pid	process
4940	sc.exe
4896	sc.exe
2052	sc.exe

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

23197502be28aab6501b23608fd0f3d82bbf096fd990db91f6bbfc1dc41ff855.exenwonwimd.exe

description	pid	process	target process
PID 2756 wrote to memory of 2856	2756	23197502be28aab6501b23608fd0f3d82bbf096fd990db91f6bbfc1dc41ff855.exe	cmd.exe
PID 2756 wrote to memory of 2856	2756	23197502be28aab6501b23608fd0f3d82bbf096fd990db91f6bbfc1dc41ff855.exe	cmd.exe
PID 2756 wrote to memory of 2856	2756	23197502be28aab6501b23608fd0f3d82bbf096fd990db91f6bbfc1dc41ff855.exe	cmd.exe
PID 2756 wrote to memory of 376	2756	23197502be28aab6501b23608fd0f3d82bbf096fd990db91f6bbfc1dc41ff855.exe	cmd.exe
PID 2756 wrote to memory of 376	2756	23197502be28aab6501b23608fd0f3d82bbf096fd990db91f6bbfc1dc41ff855.exe	cmd.exe
PID 2756 wrote to memory of 376	2756	23197502be28aab6501b23608fd0f3d82bbf096fd990db91f6bbfc1dc41ff855.exe	cmd.exe
PID 2756 wrote to memory of 2052	2756	23197502be28aab6501b23608fd0f3d82bbf096fd990db91f6bbfc1dc41ff855.exe	sc.exe
PID 2756 wrote to memory of 2052	2756	23197502be28aab6501b23608fd0f3d82bbf096fd990db91f6bbfc1dc41ff855.exe	sc.exe
PID 2756 wrote to memory of 2052	2756	23197502be28aab6501b23608fd0f3d82bbf096fd990db91f6bbfc1dc41ff855.exe	sc.exe
PID 2756 wrote to memory of 4940	2756	23197502be28aab6501b23608fd0f3d82bbf096fd990db91f6bbfc1dc41ff855.exe	sc.exe
PID 2756 wrote to memory of 4940	2756	23197502be28aab6501b23608fd0f3d82bbf096fd990db91f6bbfc1dc41ff855.exe	sc.exe
PID 2756 wrote to memory of 4940	2756	23197502be28aab6501b23608fd0f3d82bbf096fd990db91f6bbfc1dc41ff855.exe	sc.exe
PID 2756 wrote to memory of 4896	2756	23197502be28aab6501b23608fd0f3d82bbf096fd990db91f6bbfc1dc41ff855.exe	sc.exe
PID 2756 wrote to memory of 4896	2756	23197502be28aab6501b23608fd0f3d82bbf096fd990db91f6bbfc1dc41ff855.exe	sc.exe
PID 2756 wrote to memory of 4896	2756	23197502be28aab6501b23608fd0f3d82bbf096fd990db91f6bbfc1dc41ff855.exe	sc.exe
PID 2756 wrote to memory of 5000	2756	23197502be28aab6501b23608fd0f3d82bbf096fd990db91f6bbfc1dc41ff855.exe	netsh.exe
PID 2756 wrote to memory of 5000	2756	23197502be28aab6501b23608fd0f3d82bbf096fd990db91f6bbfc1dc41ff855.exe	netsh.exe
PID 2756 wrote to memory of 5000	2756	23197502be28aab6501b23608fd0f3d82bbf096fd990db91f6bbfc1dc41ff855.exe	netsh.exe
PID 4440 wrote to memory of 4376	4440	nwonwimd.exe	svchost.exe
PID 4440 wrote to memory of 4376	4440	nwonwimd.exe	svchost.exe
PID 4440 wrote to memory of 4376	4440	nwonwimd.exe	svchost.exe
PID 4440 wrote to memory of 4376	4440	nwonwimd.exe	svchost.exe
PID 4440 wrote to memory of 4376	4440	nwonwimd.exe	svchost.exe

C:\Users\Admin\AppData\Local\Temp\23197502be28aab6501b23608fd0f3d82bbf096fd990db91f6bbfc1dc41ff855.exe
"C:\Users\Admin\AppData\Local\Temp\23197502be28aab6501b23608fd0f3d82bbf096fd990db91f6bbfc1dc41ff855.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2756

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\lcvvlmhk\
2⤵
PID:2856

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\nwonwimd.exe" C:\Windows\SysWOW64\lcvvlmhk\
2⤵
PID:376

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create lcvvlmhk binPath= "C:\Windows\SysWOW64\lcvvlmhk\nwonwimd.exe /d\"C:\Users\Admin\AppData\Local\Temp\23197502be28aab6501b23608fd0f3d82bbf096fd990db91f6bbfc1dc41ff855.exe\"" type= own start= auto DisplayName= "wifi support"
2⤵
- Launches sc.exe
PID:2052

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description lcvvlmhk "wifi internet conection"
2⤵
- Launches sc.exe
PID:4940

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start lcvvlmhk
2⤵
- Launches sc.exe
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
PID:5000

C:\Windows\SysWOW64\lcvvlmhk\nwonwimd.exe
C:\Windows\SysWOW64\lcvvlmhk\nwonwimd.exe /d"C:\Users\Admin\AppData\Local\Temp\23197502be28aab6501b23608fd0f3d82bbf096fd990db91f6bbfc1dc41ff855.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4440

C:\Windows\SysWOW64\svchost.exe
svchost.exe
2⤵
- Sets service image path in registry
PID:4376

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\nwonwimd.exe
Filesize
10.1MB

MD5
5e4e68b6aff6e7e30d8d2843789b739d

SHA1
e5d2c31954bb81d0af703e49b8fdbf98d56c515c

SHA256
4b6a9567b984fb5bdfce772a84aa0ad965e3e7a75592f5907a7ab1e1d02510c4

SHA512
80e98ded975a41ba96d3e0821722209c7d3326a523ff681dc01f87cb00ac74cbe8ec23cf9aae671214fff45da81ea37041ec5a89ba89242ca2809d8febf2eee6

Download Submit
C:\Windows\SysWOW64\lcvvlmhk\nwonwimd.exe
Filesize
10.1MB

MD5
5e4e68b6aff6e7e30d8d2843789b739d

SHA1
e5d2c31954bb81d0af703e49b8fdbf98d56c515c

SHA256
4b6a9567b984fb5bdfce772a84aa0ad965e3e7a75592f5907a7ab1e1d02510c4

SHA512
80e98ded975a41ba96d3e0821722209c7d3326a523ff681dc01f87cb00ac74cbe8ec23cf9aae671214fff45da81ea37041ec5a89ba89242ca2809d8febf2eee6

Download Submit
memory/376-132-0x0000000000000000-mapping.dmp

Download
memory/2052-134-0x0000000000000000-mapping.dmp

Download
memory/2756-130-0x0000000000400000-0x000000000041D000-memory.dmp

Filesize
116KB

Download
memory/2856-131-0x0000000000000000-mapping.dmp

Download
memory/4376-141-0x0000000000860000-0x0000000000875000-memory.dmp

Filesize
84KB

Download
memory/4376-145-0x0000000000860000-0x0000000000875000-memory.dmp

Filesize
84KB

Download
memory/4376-144-0x0000000000860000-0x0000000000875000-memory.dmp

Filesize
84KB

Download
memory/4376-143-0x0000000000860000-0x0000000000875000-memory.dmp

Filesize
84KB

Download
memory/4376-140-0x0000000000000000-mapping.dmp

Download
memory/4440-139-0x0000000000400000-0x000000000041D000-memory.dmp

Filesize
116KB

Download
memory/4896-136-0x0000000000000000-mapping.dmp

Download
memory/4940-135-0x0000000000000000-mapping.dmp

Download
memory/5000-137-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads