tofsee | 8cc3efde2ca85f0d6fcb6c96beb65869fdf024b3f948c1de79194e7988446a48

General

Target

file.exe
Size

322KB
MD5

c5b9c27223bd12c6e6a0c46e5b411e27
SHA1

68a98a64db6df5bd1feb25288220d186da8fd718
SHA256

8cc3efde2ca85f0d6fcb6c96beb65869fdf024b3f948c1de79194e7988446a48
SHA512

a3d3cdb3b4b1ba88000fc458a4def99973d4a0794b9e85bd0f156643c925f3baaebe9f3a900f8b260568af484671c6c0d541e7403a6d7075a1783088ba630299
SSDEEP

3072:1KPtaVfzJ+xzpxIUgpnvKxvGbqqV7gPCs5lQYFwGfABn/9vOsJp7t:QetWkUIy4bVyCs5ZQ/OI

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

Windows security bypass 2 TTPs 1 IoCs

evasion trojan

Disabling Security Tools

T1089

Modify Registry

T1112

Processes:

svchost.exe

description	ioc	process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths\C:\Windows\SysWOW64\rsitjisn = "0"	svchost.exe

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

792 netsh.exe

pid	process
792	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\rsitjisn\ImagePath = "C:\\Windows\\SysWOW64\\rsitjisn\\jqpckksw.exe"	svchost.exe

Deletes itself 1 IoCs

Processes:

svchost.exe

pid process

772 svchost.exe
Executes dropped EXE 1 IoCs

Processes:

jqpckksw.exe

pid process

1756 jqpckksw.exe
Drops file in System32 directory 1 IoCs

Processes:

svchost.exe

description ioc process

File created C:\Windows\SysWOW64\config\systemprofile:.repos svchost.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

jqpckksw.exe

description pid process target process

PID 1756 set thread context of 772 1756 jqpckksw.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

1304 sc.exe
1856 sc.exe
1712 sc.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
772	svchost.exe

pid	process
1756	jqpckksw.exe

description	ioc	process
File created	C:\Windows\SysWOW64\config\systemprofile:.repos	svchost.exe

description	pid	process	target process
PID 1756 set thread context of 772	1756	jqpckksw.exe	svchost.exe

pid	process
1304	sc.exe
1856	sc.exe
1712	sc.exe

Modifies data under HKEY_USERS 2 IoCs

Processes:

svchost.exe

description	ioc	process
Key created	\REGISTRY\USER\.DEFAULT\Control Panel\Buses	svchost.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\Control Panel\Buses\Config0 = 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	svchost.exe

Suspicious use of WriteProcessMemory 30 IoCs

Processes:

file.exejqpckksw.exe

description	pid	process	target process
PID 1728 wrote to memory of 1528	1728	file.exe	cmd.exe
PID 1728 wrote to memory of 1528	1728	file.exe	cmd.exe
PID 1728 wrote to memory of 1528	1728	file.exe	cmd.exe
PID 1728 wrote to memory of 1528	1728	file.exe	cmd.exe
PID 1728 wrote to memory of 2036	1728	file.exe	cmd.exe
PID 1728 wrote to memory of 2036	1728	file.exe	cmd.exe
PID 1728 wrote to memory of 2036	1728	file.exe	cmd.exe
PID 1728 wrote to memory of 2036	1728	file.exe	cmd.exe
PID 1728 wrote to memory of 1304	1728	file.exe	sc.exe
PID 1728 wrote to memory of 1304	1728	file.exe	sc.exe
PID 1728 wrote to memory of 1304	1728	file.exe	sc.exe
PID 1728 wrote to memory of 1304	1728	file.exe	sc.exe
PID 1728 wrote to memory of 1856	1728	file.exe	sc.exe
PID 1728 wrote to memory of 1856	1728	file.exe	sc.exe
PID 1728 wrote to memory of 1856	1728	file.exe	sc.exe
PID 1728 wrote to memory of 1856	1728	file.exe	sc.exe
PID 1728 wrote to memory of 1712	1728	file.exe	sc.exe
PID 1728 wrote to memory of 1712	1728	file.exe	sc.exe
PID 1728 wrote to memory of 1712	1728	file.exe	sc.exe
PID 1728 wrote to memory of 1712	1728	file.exe	sc.exe
PID 1756 wrote to memory of 772	1756	jqpckksw.exe	svchost.exe
PID 1756 wrote to memory of 772	1756	jqpckksw.exe	svchost.exe
PID 1756 wrote to memory of 772	1756	jqpckksw.exe	svchost.exe
PID 1756 wrote to memory of 772	1756	jqpckksw.exe	svchost.exe
PID 1756 wrote to memory of 772	1756	jqpckksw.exe	svchost.exe
PID 1756 wrote to memory of 772	1756	jqpckksw.exe	svchost.exe
PID 1728 wrote to memory of 792	1728	file.exe	netsh.exe
PID 1728 wrote to memory of 792	1728	file.exe	netsh.exe
PID 1728 wrote to memory of 792	1728	file.exe	netsh.exe
PID 1728 wrote to memory of 792	1728	file.exe	netsh.exe

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:1728

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\rsitjisn\
2⤵
PID:1528

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\jqpckksw.exe" C:\Windows\SysWOW64\rsitjisn\
2⤵
PID:2036

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create rsitjisn binPath= "C:\Windows\SysWOW64\rsitjisn\jqpckksw.exe /d\"C:\Users\Admin\AppData\Local\Temp\file.exe\"" type= own start= auto DisplayName= "wifi support"
2⤵
- Launches sc.exe
PID:1304

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description rsitjisn "wifi internet conection"
2⤵
- Launches sc.exe
PID:1856

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start rsitjisn
2⤵
- Launches sc.exe
PID:1712

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:792

C:\Windows\SysWOW64\rsitjisn\jqpckksw.exe
C:\Windows\SysWOW64\rsitjisn\jqpckksw.exe /d"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1756

C:\Windows\SysWOW64\svchost.exe
svchost.exe
2⤵
- Windows security bypass
- Sets service image path in registry
- Deletes itself
- Drops file in System32 directory
- Modifies data under HKEY_USERS
PID:772

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

Disabling Security Tools

1

T1089

Modify Registry

2

T1112

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\jqpckksw.exe
Filesize
10.5MB

MD5
8e64f2febf4dd5bff6c9e192a5557064

SHA1
fc95b5e72cc79a57b737a1ab815728106d201e52

SHA256
c42e0888cc9972d4e52e021cc4405d3cf5c01df4c2cf069cfd3680ac02b899e4

SHA512
114736e97b16b69b9e820b907de5e7d3bbf060c0a7c0b0356d7320ef3bab8548e3be2185ee0f562d4e22354967b59e0b4d02b5468385cffca635a361b8de45ad

Download Submit
C:\Windows\SysWOW64\rsitjisn\jqpckksw.exe
Filesize
10.5MB

MD5
8e64f2febf4dd5bff6c9e192a5557064

SHA1
fc95b5e72cc79a57b737a1ab815728106d201e52

SHA256
c42e0888cc9972d4e52e021cc4405d3cf5c01df4c2cf069cfd3680ac02b899e4

SHA512
114736e97b16b69b9e820b907de5e7d3bbf060c0a7c0b0356d7320ef3bab8548e3be2185ee0f562d4e22354967b59e0b4d02b5468385cffca635a361b8de45ad

Download Submit
memory/772-67-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/772-61-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/772-62-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/772-60-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/772-66-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/772-68-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/772-69-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/772-70-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/1728-65-0x0000000000400000-0x00000000006CE000-memory.dmp

Filesize
2.8MB

Download
memory/1728-56-0x0000000000220000-0x0000000000233000-memory.dmp

Filesize
76KB

Download
memory/1756-64-0x0000000000400000-0x00000000006CE000-memory.dmp

Filesize
2.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads