tofsee | 295f2e7a08269def791aa11bfafa9d73e36ac9fa6dd292f2b62b1bcf8758aa11

General

Target

295f2e7a08269def791aa11bfafa9d73e36ac9fa6dd292f2b62b1bcf8758aa11.exe
Size

342KB
MD5

9b2b3970effdd49a3194b83a272b29bd
SHA1

9c141b488d126a2e7f25b541d14307acec0e6262
SHA256

295f2e7a08269def791aa11bfafa9d73e36ac9fa6dd292f2b62b1bcf8758aa11
SHA512

005dc7ff7bedbb07add0f048690dae179f17421e20ec9f3f63c5f54c65966752a9e46dc062ecbdbcbca7dd92591ac70822eb21c595ef453752ef878cf15a8d7c

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:

ypxvfahv.exe

pid process

5028 ypxvfahv.exe
Modifies Windows Firewall 1 TTPs 1 IoCs
evasion

Modify Existing Service
T1031

Processes:

netsh.exe

pid process

2400 netsh.exe

pid	process
5028	ypxvfahv.exe

pid	process
2400	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\yednppuo\ImagePath = "C:\\Windows\\SysWOW64\\yednppuo\\ypxvfahv.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:

295f2e7a08269def791aa11bfafa9d73e36ac9fa6dd292f2b62b1bcf8758aa11.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2632097139-1792035885-811742494-1000\Control Panel\International\Geo\Nation	295f2e7a08269def791aa11bfafa9d73e36ac9fa6dd292f2b62b1bcf8758aa11.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

ypxvfahv.exe

description pid process target process

PID 5028 set thread context of 792 5028 ypxvfahv.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

4352 sc.exe
2176 sc.exe
4060 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 5028 set thread context of 792	5028	ypxvfahv.exe	svchost.exe

pid	process
4352	sc.exe
2176	sc.exe
4060	sc.exe

Program crash 2 IoCs

Processes:

WerFault.exeWerFault.exe

pid	pid_target	process	target process
216	5004	WerFault.exe	295f2e7a08269def791aa11bfafa9d73e36ac9fa6dd292f2b62b1bcf8758aa11.exe
2336	5028	WerFault.exe	ypxvfahv.exe

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

295f2e7a08269def791aa11bfafa9d73e36ac9fa6dd292f2b62b1bcf8758aa11.exeypxvfahv.exe

description	pid	process	target process
PID 5004 wrote to memory of 5060	5004	295f2e7a08269def791aa11bfafa9d73e36ac9fa6dd292f2b62b1bcf8758aa11.exe	cmd.exe
PID 5004 wrote to memory of 5060	5004	295f2e7a08269def791aa11bfafa9d73e36ac9fa6dd292f2b62b1bcf8758aa11.exe	cmd.exe
PID 5004 wrote to memory of 5060	5004	295f2e7a08269def791aa11bfafa9d73e36ac9fa6dd292f2b62b1bcf8758aa11.exe	cmd.exe
PID 5004 wrote to memory of 4076	5004	295f2e7a08269def791aa11bfafa9d73e36ac9fa6dd292f2b62b1bcf8758aa11.exe	cmd.exe
PID 5004 wrote to memory of 4076	5004	295f2e7a08269def791aa11bfafa9d73e36ac9fa6dd292f2b62b1bcf8758aa11.exe	cmd.exe
PID 5004 wrote to memory of 4076	5004	295f2e7a08269def791aa11bfafa9d73e36ac9fa6dd292f2b62b1bcf8758aa11.exe	cmd.exe
PID 5004 wrote to memory of 2176	5004	295f2e7a08269def791aa11bfafa9d73e36ac9fa6dd292f2b62b1bcf8758aa11.exe	sc.exe
PID 5004 wrote to memory of 2176	5004	295f2e7a08269def791aa11bfafa9d73e36ac9fa6dd292f2b62b1bcf8758aa11.exe	sc.exe
PID 5004 wrote to memory of 2176	5004	295f2e7a08269def791aa11bfafa9d73e36ac9fa6dd292f2b62b1bcf8758aa11.exe	sc.exe
PID 5004 wrote to memory of 4060	5004	295f2e7a08269def791aa11bfafa9d73e36ac9fa6dd292f2b62b1bcf8758aa11.exe	sc.exe
PID 5004 wrote to memory of 4060	5004	295f2e7a08269def791aa11bfafa9d73e36ac9fa6dd292f2b62b1bcf8758aa11.exe	sc.exe
PID 5004 wrote to memory of 4060	5004	295f2e7a08269def791aa11bfafa9d73e36ac9fa6dd292f2b62b1bcf8758aa11.exe	sc.exe
PID 5004 wrote to memory of 4352	5004	295f2e7a08269def791aa11bfafa9d73e36ac9fa6dd292f2b62b1bcf8758aa11.exe	sc.exe
PID 5004 wrote to memory of 4352	5004	295f2e7a08269def791aa11bfafa9d73e36ac9fa6dd292f2b62b1bcf8758aa11.exe	sc.exe
PID 5004 wrote to memory of 4352	5004	295f2e7a08269def791aa11bfafa9d73e36ac9fa6dd292f2b62b1bcf8758aa11.exe	sc.exe
PID 5004 wrote to memory of 2400	5004	295f2e7a08269def791aa11bfafa9d73e36ac9fa6dd292f2b62b1bcf8758aa11.exe	netsh.exe
PID 5004 wrote to memory of 2400	5004	295f2e7a08269def791aa11bfafa9d73e36ac9fa6dd292f2b62b1bcf8758aa11.exe	netsh.exe
PID 5004 wrote to memory of 2400	5004	295f2e7a08269def791aa11bfafa9d73e36ac9fa6dd292f2b62b1bcf8758aa11.exe	netsh.exe
PID 5028 wrote to memory of 792	5028	ypxvfahv.exe	svchost.exe
PID 5028 wrote to memory of 792	5028	ypxvfahv.exe	svchost.exe
PID 5028 wrote to memory of 792	5028	ypxvfahv.exe	svchost.exe
PID 5028 wrote to memory of 792	5028	ypxvfahv.exe	svchost.exe
PID 5028 wrote to memory of 792	5028	ypxvfahv.exe	svchost.exe

C:\Users\Admin\AppData\Local\Temp\295f2e7a08269def791aa11bfafa9d73e36ac9fa6dd292f2b62b1bcf8758aa11.exe
"C:\Users\Admin\AppData\Local\Temp\295f2e7a08269def791aa11bfafa9d73e36ac9fa6dd292f2b62b1bcf8758aa11.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:5004

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\yednppuo\
2⤵
PID:5060

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\ypxvfahv.exe" C:\Windows\SysWOW64\yednppuo\
2⤵
PID:4076

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create yednppuo binPath= "C:\Windows\SysWOW64\yednppuo\ypxvfahv.exe /d\"C:\Users\Admin\AppData\Local\Temp\295f2e7a08269def791aa11bfafa9d73e36ac9fa6dd292f2b62b1bcf8758aa11.exe\"" type= own start= auto DisplayName= "wifi support"
2⤵
- Launches sc.exe
PID:2176

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description yednppuo "wifi internet conection"
2⤵
- Launches sc.exe
PID:4060

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start yednppuo
2⤵
- Launches sc.exe
PID:4352

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:2400

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 5004 -s 1328
2⤵
- Program crash
PID:216

C:\Windows\SysWOW64\yednppuo\ypxvfahv.exe
C:\Windows\SysWOW64\yednppuo\ypxvfahv.exe /d"C:\Users\Admin\AppData\Local\Temp\295f2e7a08269def791aa11bfafa9d73e36ac9fa6dd292f2b62b1bcf8758aa11.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:5028

C:\Windows\SysWOW64\svchost.exe
svchost.exe
2⤵
- Sets service image path in registry
PID:792

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 5028 -s 512
2⤵
- Program crash
PID:2336

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 5004 -ip 5004
1⤵
PID:3152

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 188 -p 5028 -ip 5028
1⤵
PID:4832

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\ypxvfahv.exe
Filesize
13.5MB

MD5
4561265193a7884d8928188539c16f66

SHA1
d957233325785632c7bfbd9129393c54e19fc2f9

SHA256
fe1719351da7086e5def801e46902dfe982533c34187ff9e996027cef86c11f1

SHA512
22caf23fff540bafea98d7d3f8c1d38f93a9ee68c19238b8d26bd104df16b5a5c191ca147851a03f9019300bb073f600dc8ef5378d57c2cf7ec670b744ffb3d6

Download Submit
C:\Windows\SysWOW64\yednppuo\ypxvfahv.exe
Filesize
13.5MB

MD5
4561265193a7884d8928188539c16f66

SHA1
d957233325785632c7bfbd9129393c54e19fc2f9

SHA256
fe1719351da7086e5def801e46902dfe982533c34187ff9e996027cef86c11f1

SHA512
22caf23fff540bafea98d7d3f8c1d38f93a9ee68c19238b8d26bd104df16b5a5c191ca147851a03f9019300bb073f600dc8ef5378d57c2cf7ec670b744ffb3d6

Download Submit
memory/792-144-0x0000000000000000-mapping.dmp

Download
memory/792-145-0x0000000000EA0000-0x0000000000EB5000-memory.dmp

Filesize
84KB

Download
memory/792-151-0x0000000000EA0000-0x0000000000EB5000-memory.dmp

Filesize
84KB

Download
memory/792-150-0x0000000000EA0000-0x0000000000EB5000-memory.dmp

Filesize
84KB

Download
memory/2176-136-0x0000000000000000-mapping.dmp

Download
memory/2400-139-0x0000000000000000-mapping.dmp

Download
memory/4060-137-0x0000000000000000-mapping.dmp

Download
memory/4076-134-0x0000000000000000-mapping.dmp

Download
memory/4352-138-0x0000000000000000-mapping.dmp

Download
memory/5004-130-0x0000000000532000-0x0000000000545000-memory.dmp

Filesize
76KB

Download
memory/5004-131-0x0000000000532000-0x0000000000545000-memory.dmp

Filesize
76KB

Download
memory/5004-132-0x0000000000400000-0x000000000046B000-memory.dmp

Filesize
428KB

Download
memory/5004-141-0x0000000000532000-0x0000000000545000-memory.dmp

Filesize
76KB

Download
memory/5004-142-0x0000000000400000-0x000000000046B000-memory.dmp

Filesize
428KB

Download
memory/5028-143-0x000000000055C000-0x000000000056F000-memory.dmp

Filesize
76KB

Download
memory/5028-148-0x000000000055C000-0x000000000056F000-memory.dmp

Filesize
76KB

Download
memory/5028-149-0x0000000000400000-0x000000000046B000-memory.dmp

Filesize
428KB

Download
memory/5060-133-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads