tofsee | af4515bb1ca19b5fdc2cf47391594cb4ca3f2c3063a1c703e4331e741d31e4fc

General

Target

file.exe
Size

167KB
MD5

65e43f6b5f4bbf71f6ecab7473d5f169
SHA1

647be05e012efc56178c827e429208f773e7358c
SHA256

af4515bb1ca19b5fdc2cf47391594cb4ca3f2c3063a1c703e4331e741d31e4fc
SHA512

9da8f0b9be029a65d2971ccb936a0c0a08a33275f3260ac232f497744ba8bb088dd377a0aaf2c083cdc3d2bb0d1f39d9af19ac79f245276ce64c43fe1adb07c9
SSDEEP

3072:RPJ1pyY1u2XpS5VL7++e3BuFF9uOnWR0vkqNuG2:N0iZXh+eKFlWmk+u

Score

10^/10

tofsee evasion persistence trojan

Malware Config

Extracted

Family

tofsee

C2

svartalfheim.top

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\coocpdyy = "0"	svchost.exe

Creates new service(s) 1 TTPs
persistence

New Service
T1050
Executes dropped EXE 1 IoCs

Processes:

lfvmpnqz.exe

pid process

1316 lfvmpnqz.exe
Modifies Windows Firewall 1 TTPs 1 IoCs
evasion

Modify Existing Service
T1031

Processes:

netsh.exe

pid process

1412 netsh.exe

pid	process
1316	lfvmpnqz.exe

pid	process
1412	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\coocpdyy\ImagePath = "C:\\Windows\\SysWOW64\\coocpdyy\\lfvmpnqz.exe"	svchost.exe

Deletes itself 1 IoCs

Processes:

svchost.exe

pid process

1516 svchost.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

lfvmpnqz.exe

description pid process target process

PID 1316 set thread context of 1516 1316 lfvmpnqz.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

560 sc.exe
1696 sc.exe
1996 sc.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

pid	process
1516	svchost.exe

description	pid	process	target process
PID 1316 set thread context of 1516	1316	lfvmpnqz.exe	svchost.exe

pid	process
560	sc.exe
1696	sc.exe
1996	sc.exe

Suspicious use of WriteProcessMemory 30 IoCs

Processes:

file.exelfvmpnqz.exe

description	pid	process	target process
PID 2016 wrote to memory of 1924	2016	file.exe	cmd.exe
PID 2016 wrote to memory of 1924	2016	file.exe	cmd.exe
PID 2016 wrote to memory of 1924	2016	file.exe	cmd.exe
PID 2016 wrote to memory of 1924	2016	file.exe	cmd.exe
PID 2016 wrote to memory of 1964	2016	file.exe	cmd.exe
PID 2016 wrote to memory of 1964	2016	file.exe	cmd.exe
PID 2016 wrote to memory of 1964	2016	file.exe	cmd.exe
PID 2016 wrote to memory of 1964	2016	file.exe	cmd.exe
PID 2016 wrote to memory of 560	2016	file.exe	sc.exe
PID 2016 wrote to memory of 560	2016	file.exe	sc.exe
PID 2016 wrote to memory of 560	2016	file.exe	sc.exe
PID 2016 wrote to memory of 560	2016	file.exe	sc.exe
PID 2016 wrote to memory of 1696	2016	file.exe	sc.exe
PID 2016 wrote to memory of 1696	2016	file.exe	sc.exe
PID 2016 wrote to memory of 1696	2016	file.exe	sc.exe
PID 2016 wrote to memory of 1696	2016	file.exe	sc.exe
PID 2016 wrote to memory of 1996	2016	file.exe	sc.exe
PID 2016 wrote to memory of 1996	2016	file.exe	sc.exe
PID 2016 wrote to memory of 1996	2016	file.exe	sc.exe
PID 2016 wrote to memory of 1996	2016	file.exe	sc.exe
PID 2016 wrote to memory of 1412	2016	file.exe	netsh.exe
PID 2016 wrote to memory of 1412	2016	file.exe	netsh.exe
PID 2016 wrote to memory of 1412	2016	file.exe	netsh.exe
PID 2016 wrote to memory of 1412	2016	file.exe	netsh.exe
PID 1316 wrote to memory of 1516	1316	lfvmpnqz.exe	svchost.exe
PID 1316 wrote to memory of 1516	1316	lfvmpnqz.exe	svchost.exe
PID 1316 wrote to memory of 1516	1316	lfvmpnqz.exe	svchost.exe
PID 1316 wrote to memory of 1516	1316	lfvmpnqz.exe	svchost.exe
PID 1316 wrote to memory of 1516	1316	lfvmpnqz.exe	svchost.exe
PID 1316 wrote to memory of 1516	1316	lfvmpnqz.exe	svchost.exe

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:2016

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\coocpdyy\
2⤵
PID:1924

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\lfvmpnqz.exe" C:\Windows\SysWOW64\coocpdyy\
2⤵
PID:1964

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create coocpdyy binPath= "C:\Windows\SysWOW64\coocpdyy\lfvmpnqz.exe /d\"C:\Users\Admin\AppData\Local\Temp\file.exe\"" type= own start= auto DisplayName= "wifi support"
2⤵
- Launches sc.exe
PID:560

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description coocpdyy "wifi internet conection"
2⤵
- Launches sc.exe
PID:1696

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start coocpdyy
2⤵
- Launches sc.exe
PID:1996

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:1412

C:\Windows\SysWOW64\coocpdyy\lfvmpnqz.exe
C:\Windows\SysWOW64\coocpdyy\lfvmpnqz.exe /d"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1316

C:\Windows\SysWOW64\svchost.exe
svchost.exe
2⤵
- Windows security bypass
- Sets service image path in registry
- Deletes itself
PID:1516

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\lfvmpnqz.exe
Filesize
14.0MB

MD5
a4c96231407b7af4ebdba9b60c5e94a9

SHA1
56abea627ac56869fca54f423fcdce87db85415d

SHA256
ce56d688ba5c060850676eda25b194d7b8a8ea2fe5570cc527416d601530baa2

SHA512
6015cb39469fad2e9206b36bda67f024799997555165f79bf3f79a87850602f0bbe34b318e5be76d3ad24466b23b3f9d99e717a88e35f5733ea526ad3dc70093

Download Submit
C:\Windows\SysWOW64\coocpdyy\lfvmpnqz.exe
Filesize
14.0MB

MD5
a4c96231407b7af4ebdba9b60c5e94a9

SHA1
56abea627ac56869fca54f423fcdce87db85415d

SHA256
ce56d688ba5c060850676eda25b194d7b8a8ea2fe5570cc527416d601530baa2

SHA512
6015cb39469fad2e9206b36bda67f024799997555165f79bf3f79a87850602f0bbe34b318e5be76d3ad24466b23b3f9d99e717a88e35f5733ea526ad3dc70093

Download Submit
memory/560-61-0x0000000000000000-mapping.dmp

Download
memory/1316-77-0x0000000000400000-0x000000000070B000-memory.dmp

Filesize
3.0MB

Download
memory/1316-76-0x00000000002EB000-0x00000000002FC000-memory.dmp

Filesize
68KB

Download
memory/1412-65-0x0000000000000000-mapping.dmp

Download
memory/1516-71-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/1516-72-0x0000000000089A6B-mapping.dmp

Download
memory/1516-80-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/1516-79-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/1516-69-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/1696-62-0x0000000000000000-mapping.dmp

Download
memory/1924-55-0x0000000000000000-mapping.dmp

Download
memory/1964-59-0x0000000000000000-mapping.dmp

Download
memory/1996-63-0x0000000000000000-mapping.dmp

Download
memory/2016-58-0x0000000000400000-0x000000000070B000-memory.dmp

Filesize
3.0MB

Download
memory/2016-54-0x0000000075A71000-0x0000000075A73000-memory.dmp

Filesize
8KB

Download
memory/2016-57-0x0000000000220000-0x0000000000233000-memory.dmp

Filesize
76KB

Download
memory/2016-67-0x0000000000400000-0x000000000070B000-memory.dmp

Filesize
3.0MB

Download
memory/2016-56-0x000000000081B000-0x000000000082C000-memory.dmp

Filesize
68KB

Download
memory/2016-66-0x000000000081B000-0x000000000082C000-memory.dmp

Filesize
68KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads