tofsee | 4c536a8728b5a2207332856d9aea7be3be41f0b2a921c049a73894e371ca6cb0

General

Target

4c536a8728b5a2207332856d9aea7be3be41f0b2a921c049a73894e371ca6cb0.exe
Size

341KB
MD5

c8a7a319ce6c507a8fa2b90c201c728e
SHA1

d0683f663b502598c4f2c543cb1c2554eebd6e61
SHA256

4c536a8728b5a2207332856d9aea7be3be41f0b2a921c049a73894e371ca6cb0
SHA512

98c46849126cf94a3a9ac7c0c7e6525f44e2b46b77d6700e7c0adc61054b78f9cdc3d7bddecaf1ed4922d5f5af8c0426396ee26dcb31970225523118666864fc

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:

vtawvect.exe

pid process

4336 vtawvect.exe
Modifies Windows Firewall 1 TTPs 1 IoCs
evasion

Modify Existing Service
T1031

Processes:

netsh.exe

pid process

3732 netsh.exe

pid	process
4336	vtawvect.exe

pid	process
3732	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\fviqkoiv\ImagePath = "C:\\Windows\\SysWOW64\\fviqkoiv\\vtawvect.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:

4c536a8728b5a2207332856d9aea7be3be41f0b2a921c049a73894e371ca6cb0.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2632097139-1792035885-811742494-1000\Control Panel\International\Geo\Nation	4c536a8728b5a2207332856d9aea7be3be41f0b2a921c049a73894e371ca6cb0.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

vtawvect.exe

description pid process target process

PID 4336 set thread context of 3044 4336 vtawvect.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

4440 sc.exe
2832 sc.exe
1452 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 4336 set thread context of 3044	4336	vtawvect.exe	svchost.exe

pid	process
4440	sc.exe
2832	sc.exe
1452	sc.exe

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

4c536a8728b5a2207332856d9aea7be3be41f0b2a921c049a73894e371ca6cb0.exevtawvect.exe

description	pid	process	target process
PID 4700 wrote to memory of 2284	4700	4c536a8728b5a2207332856d9aea7be3be41f0b2a921c049a73894e371ca6cb0.exe	cmd.exe
PID 4700 wrote to memory of 2284	4700	4c536a8728b5a2207332856d9aea7be3be41f0b2a921c049a73894e371ca6cb0.exe	cmd.exe
PID 4700 wrote to memory of 2284	4700	4c536a8728b5a2207332856d9aea7be3be41f0b2a921c049a73894e371ca6cb0.exe	cmd.exe
PID 4700 wrote to memory of 4236	4700	4c536a8728b5a2207332856d9aea7be3be41f0b2a921c049a73894e371ca6cb0.exe	cmd.exe
PID 4700 wrote to memory of 4236	4700	4c536a8728b5a2207332856d9aea7be3be41f0b2a921c049a73894e371ca6cb0.exe	cmd.exe
PID 4700 wrote to memory of 4236	4700	4c536a8728b5a2207332856d9aea7be3be41f0b2a921c049a73894e371ca6cb0.exe	cmd.exe
PID 4700 wrote to memory of 1452	4700	4c536a8728b5a2207332856d9aea7be3be41f0b2a921c049a73894e371ca6cb0.exe	sc.exe
PID 4700 wrote to memory of 1452	4700	4c536a8728b5a2207332856d9aea7be3be41f0b2a921c049a73894e371ca6cb0.exe	sc.exe
PID 4700 wrote to memory of 1452	4700	4c536a8728b5a2207332856d9aea7be3be41f0b2a921c049a73894e371ca6cb0.exe	sc.exe
PID 4700 wrote to memory of 4440	4700	4c536a8728b5a2207332856d9aea7be3be41f0b2a921c049a73894e371ca6cb0.exe	sc.exe
PID 4700 wrote to memory of 4440	4700	4c536a8728b5a2207332856d9aea7be3be41f0b2a921c049a73894e371ca6cb0.exe	sc.exe
PID 4700 wrote to memory of 4440	4700	4c536a8728b5a2207332856d9aea7be3be41f0b2a921c049a73894e371ca6cb0.exe	sc.exe
PID 4700 wrote to memory of 2832	4700	4c536a8728b5a2207332856d9aea7be3be41f0b2a921c049a73894e371ca6cb0.exe	sc.exe
PID 4700 wrote to memory of 2832	4700	4c536a8728b5a2207332856d9aea7be3be41f0b2a921c049a73894e371ca6cb0.exe	sc.exe
PID 4700 wrote to memory of 2832	4700	4c536a8728b5a2207332856d9aea7be3be41f0b2a921c049a73894e371ca6cb0.exe	sc.exe
PID 4700 wrote to memory of 3732	4700	4c536a8728b5a2207332856d9aea7be3be41f0b2a921c049a73894e371ca6cb0.exe	netsh.exe
PID 4700 wrote to memory of 3732	4700	4c536a8728b5a2207332856d9aea7be3be41f0b2a921c049a73894e371ca6cb0.exe	netsh.exe
PID 4700 wrote to memory of 3732	4700	4c536a8728b5a2207332856d9aea7be3be41f0b2a921c049a73894e371ca6cb0.exe	netsh.exe
PID 4336 wrote to memory of 3044	4336	vtawvect.exe	svchost.exe
PID 4336 wrote to memory of 3044	4336	vtawvect.exe	svchost.exe
PID 4336 wrote to memory of 3044	4336	vtawvect.exe	svchost.exe
PID 4336 wrote to memory of 3044	4336	vtawvect.exe	svchost.exe
PID 4336 wrote to memory of 3044	4336	vtawvect.exe	svchost.exe

C:\Users\Admin\AppData\Local\Temp\4c536a8728b5a2207332856d9aea7be3be41f0b2a921c049a73894e371ca6cb0.exe
"C:\Users\Admin\AppData\Local\Temp\4c536a8728b5a2207332856d9aea7be3be41f0b2a921c049a73894e371ca6cb0.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4700

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\fviqkoiv\
2⤵
PID:2284

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\vtawvect.exe" C:\Windows\SysWOW64\fviqkoiv\
2⤵
PID:4236

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create fviqkoiv binPath= "C:\Windows\SysWOW64\fviqkoiv\vtawvect.exe /d\"C:\Users\Admin\AppData\Local\Temp\4c536a8728b5a2207332856d9aea7be3be41f0b2a921c049a73894e371ca6cb0.exe\"" type= own start= auto DisplayName= "wifi support"
2⤵
- Launches sc.exe
PID:1452

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description fviqkoiv "wifi internet conection"
2⤵
- Launches sc.exe
PID:4440

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start fviqkoiv
2⤵
- Launches sc.exe
PID:2832

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:3732

C:\Windows\SysWOW64\fviqkoiv\vtawvect.exe
C:\Windows\SysWOW64\fviqkoiv\vtawvect.exe /d"C:\Users\Admin\AppData\Local\Temp\4c536a8728b5a2207332856d9aea7be3be41f0b2a921c049a73894e371ca6cb0.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4336

C:\Windows\SysWOW64\svchost.exe
svchost.exe
2⤵
- Sets service image path in registry
PID:3044

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\vtawvect.exe
Filesize
10.8MB

MD5
1f19aec385ac8f9512feb7f8841223b3

SHA1
a5d2adb3815ffabb2b5cb9080f7bdf7b827b7cd0

SHA256
e78722074e1e0535487dc30de95c8c4fa7b6738f0b4920ad6a06a2f420ff88f6

SHA512
94415b0d2e11528dca9c1833806ff4aed98338a905f04a0a36d50c34bb49452f1349b97a297ac70822872017f58660bbc0da94397e0ffe72f66f5ba409ac71d1

Download Submit
C:\Windows\SysWOW64\fviqkoiv\vtawvect.exe
Filesize
10.8MB

MD5
1f19aec385ac8f9512feb7f8841223b3

SHA1
a5d2adb3815ffabb2b5cb9080f7bdf7b827b7cd0

SHA256
e78722074e1e0535487dc30de95c8c4fa7b6738f0b4920ad6a06a2f420ff88f6

SHA512
94415b0d2e11528dca9c1833806ff4aed98338a905f04a0a36d50c34bb49452f1349b97a297ac70822872017f58660bbc0da94397e0ffe72f66f5ba409ac71d1

Download Submit
memory/1452-137-0x0000000000000000-mapping.dmp

Download
memory/2284-133-0x0000000000000000-mapping.dmp

Download
memory/2832-139-0x0000000000000000-mapping.dmp

Download
memory/3044-145-0x0000000000630000-0x0000000000645000-memory.dmp

Filesize
84KB

Download
memory/3044-144-0x0000000000000000-mapping.dmp

Download
memory/3044-151-0x0000000000630000-0x0000000000645000-memory.dmp

Filesize
84KB

Download
memory/3044-150-0x0000000000630000-0x0000000000645000-memory.dmp

Filesize
84KB

Download
memory/3732-141-0x0000000000000000-mapping.dmp

Download
memory/4236-135-0x0000000000000000-mapping.dmp

Download
memory/4336-149-0x0000000000400000-0x000000000094F000-memory.dmp

Filesize
5.3MB

Download
memory/4336-143-0x00000000009F8000-0x0000000000A0A000-memory.dmp

Filesize
72KB

Download
memory/4336-146-0x00000000009F8000-0x0000000000A0A000-memory.dmp

Filesize
72KB

Download
memory/4440-138-0x0000000000000000-mapping.dmp

Download
memory/4700-142-0x0000000000400000-0x000000000094F000-memory.dmp

Filesize
5.3MB

Download
memory/4700-130-0x00000000009DD000-0x00000000009EF000-memory.dmp

Filesize
72KB

Download
memory/4700-131-0x00000000009DD000-0x00000000009EF000-memory.dmp

Filesize
72KB

Download
memory/4700-132-0x0000000000990000-0x00000000009A3000-memory.dmp

Filesize
76KB

Download
memory/4700-134-0x0000000000400000-0x000000000094F000-memory.dmp

Filesize
5.3MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads