tofsee | 25ed67b390cafbd1ebcebed4c9cad13c38e6998c45e501e23d6652ac04bb69ef

General

Target

097bc3c7d6f6f50a503fdb7a56e22a34.exe
Size

312KB
MD5

097bc3c7d6f6f50a503fdb7a56e22a34
SHA1

bc801204c76b73ee9e66a9a7bdffd856965604e0
SHA256

25ed67b390cafbd1ebcebed4c9cad13c38e6998c45e501e23d6652ac04bb69ef
SHA512

7dedbefbe0a0af1d1541374a1a8916eb45d6037c15b8ae36ed28c4dfc0a9d22f5062b584b856b8d32cf5d675f1a718b31b029dc5abcea4c40d8925ae42f05eea
SSDEEP

3072:6AX8ODio3+FCLQbFK+OCQ/KbqAjxBn7UJIdg6hO3Vd+eVRg/5wcw3P3XqT:vPDl5L0FKBDKbzBYd6upvG

Score

10^/10

tofsee evasion persistence trojan

Malware Config

Extracted

Family

tofsee

C2

vanaheim.cn

jotunheim.name

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
Modifies Windows Firewall 1 TTPs 1 IoCs
evasion

Modify Existing Service
T1031

Processes:

netsh.exe

pid process

4044 netsh.exe

pid	process
4044	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\opobxkye\ImagePath = "C:\\Windows\\SysWOW64\\opobxkye\\gjgzqsmc.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:

097bc3c7d6f6f50a503fdb7a56e22a34.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-4238149048-355649189-894321705-1000\Control Panel\International\Geo\Nation	097bc3c7d6f6f50a503fdb7a56e22a34.exe

Executes dropped EXE 1 IoCs

Processes:

gjgzqsmc.exe

pid process

960 gjgzqsmc.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

gjgzqsmc.exe

description pid process target process

PID 960 set thread context of 2000 960 gjgzqsmc.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

4620 sc.exe
3904 sc.exe
3568 sc.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082
Program crash 2 IoCs

Processes:

WerFault.exeWerFault.exe

pid pid_target process target process

5012 3476 WerFault.exe 097bc3c7d6f6f50a503fdb7a56e22a34.exe
1288 960 WerFault.exe gjgzqsmc.exe

pid	process
960	gjgzqsmc.exe

description	pid	process	target process
PID 960 set thread context of 2000	960	gjgzqsmc.exe	svchost.exe

pid	process
4620	sc.exe
3904	sc.exe
3568	sc.exe

pid	pid_target	process	target process
5012	3476	WerFault.exe	097bc3c7d6f6f50a503fdb7a56e22a34.exe
1288	960	WerFault.exe	gjgzqsmc.exe

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

097bc3c7d6f6f50a503fdb7a56e22a34.exegjgzqsmc.exe

description	pid	process	target process
PID 3476 wrote to memory of 4900	3476	097bc3c7d6f6f50a503fdb7a56e22a34.exe	cmd.exe
PID 3476 wrote to memory of 4900	3476	097bc3c7d6f6f50a503fdb7a56e22a34.exe	cmd.exe
PID 3476 wrote to memory of 4900	3476	097bc3c7d6f6f50a503fdb7a56e22a34.exe	cmd.exe
PID 3476 wrote to memory of 1376	3476	097bc3c7d6f6f50a503fdb7a56e22a34.exe	cmd.exe
PID 3476 wrote to memory of 1376	3476	097bc3c7d6f6f50a503fdb7a56e22a34.exe	cmd.exe
PID 3476 wrote to memory of 1376	3476	097bc3c7d6f6f50a503fdb7a56e22a34.exe	cmd.exe
PID 3476 wrote to memory of 4620	3476	097bc3c7d6f6f50a503fdb7a56e22a34.exe	sc.exe
PID 3476 wrote to memory of 4620	3476	097bc3c7d6f6f50a503fdb7a56e22a34.exe	sc.exe
PID 3476 wrote to memory of 4620	3476	097bc3c7d6f6f50a503fdb7a56e22a34.exe	sc.exe
PID 3476 wrote to memory of 3904	3476	097bc3c7d6f6f50a503fdb7a56e22a34.exe	sc.exe
PID 3476 wrote to memory of 3904	3476	097bc3c7d6f6f50a503fdb7a56e22a34.exe	sc.exe
PID 3476 wrote to memory of 3904	3476	097bc3c7d6f6f50a503fdb7a56e22a34.exe	sc.exe
PID 3476 wrote to memory of 3568	3476	097bc3c7d6f6f50a503fdb7a56e22a34.exe	sc.exe
PID 3476 wrote to memory of 3568	3476	097bc3c7d6f6f50a503fdb7a56e22a34.exe	sc.exe
PID 3476 wrote to memory of 3568	3476	097bc3c7d6f6f50a503fdb7a56e22a34.exe	sc.exe
PID 3476 wrote to memory of 4044	3476	097bc3c7d6f6f50a503fdb7a56e22a34.exe	netsh.exe
PID 3476 wrote to memory of 4044	3476	097bc3c7d6f6f50a503fdb7a56e22a34.exe	netsh.exe
PID 3476 wrote to memory of 4044	3476	097bc3c7d6f6f50a503fdb7a56e22a34.exe	netsh.exe
PID 960 wrote to memory of 2000	960	gjgzqsmc.exe	svchost.exe
PID 960 wrote to memory of 2000	960	gjgzqsmc.exe	svchost.exe
PID 960 wrote to memory of 2000	960	gjgzqsmc.exe	svchost.exe
PID 960 wrote to memory of 2000	960	gjgzqsmc.exe	svchost.exe
PID 960 wrote to memory of 2000	960	gjgzqsmc.exe	svchost.exe

C:\Users\Admin\AppData\Local\Temp\097bc3c7d6f6f50a503fdb7a56e22a34.exe
"C:\Users\Admin\AppData\Local\Temp\097bc3c7d6f6f50a503fdb7a56e22a34.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3476

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\opobxkye\
2⤵
PID:4900

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\gjgzqsmc.exe" C:\Windows\SysWOW64\opobxkye\
2⤵
PID:1376

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create opobxkye binPath= "C:\Windows\SysWOW64\opobxkye\gjgzqsmc.exe /d\"C:\Users\Admin\AppData\Local\Temp\097bc3c7d6f6f50a503fdb7a56e22a34.exe\"" type= own start= auto DisplayName= "wifi support"
2⤵
- Launches sc.exe
PID:4620

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description opobxkye "wifi internet conection"
2⤵
- Launches sc.exe
PID:3904

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start opobxkye
2⤵
- Launches sc.exe
PID:3568

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:4044

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 3476 -s 1040
2⤵
- Program crash
PID:5012

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 480 -p 3476 -ip 3476
1⤵
PID:3772

C:\Windows\SysWOW64\opobxkye\gjgzqsmc.exe
C:\Windows\SysWOW64\opobxkye\gjgzqsmc.exe /d"C:\Users\Admin\AppData\Local\Temp\097bc3c7d6f6f50a503fdb7a56e22a34.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:960

C:\Windows\SysWOW64\svchost.exe
svchost.exe
2⤵
- Sets service image path in registry
PID:2000

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 960 -s 516
2⤵
- Program crash
PID:1288

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 960 -ip 960
1⤵
PID:8

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\gjgzqsmc.exe
Filesize
11.6MB

MD5
ab03c7801b47f26cb2d6b3362c2a204d

SHA1
edab12fc667896e47defd97cbf2839a538beb164

SHA256
b1e1f5b2f16f2b749d3466fad61d55b586d6446ab6afc25bc5fc4796263f8c71

SHA512
7c636e0add560d8db452861bcc8b88852c56dba033d954c7698b3324f1c7ba2d126c14726be8eec613b0b1c2f22cd4da4372b30ab0589c38243fdbefa7d3cdcf

Download Submit
C:\Windows\SysWOW64\opobxkye\gjgzqsmc.exe
Filesize
11.6MB

MD5
ab03c7801b47f26cb2d6b3362c2a204d

SHA1
edab12fc667896e47defd97cbf2839a538beb164

SHA256
b1e1f5b2f16f2b749d3466fad61d55b586d6446ab6afc25bc5fc4796263f8c71

SHA512
7c636e0add560d8db452861bcc8b88852c56dba033d954c7698b3324f1c7ba2d126c14726be8eec613b0b1c2f22cd4da4372b30ab0589c38243fdbefa7d3cdcf

Download Submit
memory/960-146-0x0000000000400000-0x00000000006E9000-memory.dmp

Filesize
2.9MB

Download
memory/2000-142-0x0000000001230000-0x0000000001245000-memory.dmp

Filesize
84KB

Download
memory/2000-147-0x0000000001230000-0x0000000001245000-memory.dmp

Filesize
84KB

Download
memory/2000-148-0x0000000001230000-0x0000000001245000-memory.dmp

Filesize
84KB

Download
memory/2000-149-0x0000000001230000-0x0000000001245000-memory.dmp

Filesize
84KB

Download
memory/2000-150-0x0000000001230000-0x0000000001245000-memory.dmp

Filesize
84KB

Download
memory/3476-134-0x0000000000880000-0x0000000000893000-memory.dmp

Filesize
76KB

Download
memory/3476-136-0x0000000000400000-0x00000000006E9000-memory.dmp

Filesize
2.9MB

Download
memory/3476-137-0x0000000000880000-0x0000000000893000-memory.dmp

Filesize
76KB

Download
memory/3476-141-0x0000000000400000-0x00000000006E9000-memory.dmp

Filesize
2.9MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads