tofsee | e75089e05f365213c69757673dfd334bbd46af1ef8a68b1cbdd7d1741a4381f2

General

Target

b71122e4dea173f9fb6946e17de8c1b44ada3afd08f6eb93cf39dc6eaff046da.exe
Size

257KB
MD5

1878343378de0f934ea65fab5939a59a
SHA1

0562a20680014897f0c60769c56cdfbadc42596a
SHA256

b71122e4dea173f9fb6946e17de8c1b44ada3afd08f6eb93cf39dc6eaff046da
SHA512

e2abb6ab92c9f025e8eb077c6bec3e7a56538e31d765cd841e65d100fcd88baa14e52926cd7da2eea6367f42e1950db2b98ccd2d2a454114ad9a22b12dc066a0
SSDEEP

3072:q9/0bgFaqtTkenNkcS542ov3BQWDbZpAMzCO/hVlFmg4WBlx824dELM6HTxBG12Y:0sbmDnGcS542F4bfntDlFSgnfo+b9Y

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

Disable or Modify Tools

T1562.001

Modify Registry

T1112

Processes:

svchost.exe

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

Creates new service(s) 1 TTPs
persistence

Windows Service
T1543.003
Modifies Windows Firewall 2 TTPs 1 IoCs
evasion

Windows Service
T1543.003

Disable or Modify System Firewall
T1562.004

Processes:

netsh.exe

pid process

2380 netsh.exe

pid	process
2380	netsh.exe

Sets service image path in registry 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

svchost.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\tlskewpn\ImagePath = "C:\\Windows\\SysWOW64\\tlskewpn\\fmpkjddx.exe"	svchost.exe

Deletes itself 1 IoCs

Processes:

svchost.exe

pid process

2924 svchost.exe
Executes dropped EXE 1 IoCs

Processes:

fmpkjddx.exe

pid process

2436 fmpkjddx.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:

fmpkjddx.exe

description pid process target process

PID 2436 set thread context of 2924 2436 fmpkjddx.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

2668 sc.exe
2556 sc.exe
2612 sc.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
2924	svchost.exe

pid	process
2436	fmpkjddx.exe

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

description	pid	process	target process
PID 2436 set thread context of 2924	2436	fmpkjddx.exe	svchost.exe

pid	process
2668	sc.exe
2556	sc.exe
2612	sc.exe

Modifies data under HKEY_USERS 2 IoCs

Processes:

svchost.exe

description	ioc	process
Set value (data)	\REGISTRY\USER\.DEFAULT\Control Panel\Buses\Config0 = 008d663da27d0d0324edb47d450dd49d084297dce82e72baa49c24fd8c7f441dfaca57739bcd945d24edb47d470dd49d024195daf71261adc06d04fda6e22673bbc9154961cda5681cda854e7439e7a8644490bdb57a22e5945d04cffd8d3c74bbc4103d29feac6e16da8745753ed4f10b4c90d8f6127db9a4593494b48d6c25d09a470d36f4a35d579fc2223064b9f86400c288b07c2deb92540dfda8e2377c88f2005469a8946c11d5834c773de1af542d86cfe13e7bb1d26d4299b7a0397490c6151370a4f9385388d6533678d4	svchost.exe
Key created	\REGISTRY\USER\.DEFAULT\Control Panel\Buses	svchost.exe

Suspicious use of WriteProcessMemory 30 IoCs

Processes:

b71122e4dea173f9fb6946e17de8c1b44ada3afd08f6eb93cf39dc6eaff046da.exefmpkjddx.exe

description	pid	process	target process
PID 1704 wrote to memory of 2996	1704	b71122e4dea173f9fb6946e17de8c1b44ada3afd08f6eb93cf39dc6eaff046da.exe	cmd.exe
PID 1704 wrote to memory of 2996	1704	b71122e4dea173f9fb6946e17de8c1b44ada3afd08f6eb93cf39dc6eaff046da.exe	cmd.exe
PID 1704 wrote to memory of 2996	1704	b71122e4dea173f9fb6946e17de8c1b44ada3afd08f6eb93cf39dc6eaff046da.exe	cmd.exe
PID 1704 wrote to memory of 2996	1704	b71122e4dea173f9fb6946e17de8c1b44ada3afd08f6eb93cf39dc6eaff046da.exe	cmd.exe
PID 1704 wrote to memory of 2616	1704	b71122e4dea173f9fb6946e17de8c1b44ada3afd08f6eb93cf39dc6eaff046da.exe	cmd.exe
PID 1704 wrote to memory of 2616	1704	b71122e4dea173f9fb6946e17de8c1b44ada3afd08f6eb93cf39dc6eaff046da.exe	cmd.exe
PID 1704 wrote to memory of 2616	1704	b71122e4dea173f9fb6946e17de8c1b44ada3afd08f6eb93cf39dc6eaff046da.exe	cmd.exe
PID 1704 wrote to memory of 2616	1704	b71122e4dea173f9fb6946e17de8c1b44ada3afd08f6eb93cf39dc6eaff046da.exe	cmd.exe
PID 1704 wrote to memory of 2668	1704	b71122e4dea173f9fb6946e17de8c1b44ada3afd08f6eb93cf39dc6eaff046da.exe	sc.exe
PID 1704 wrote to memory of 2668	1704	b71122e4dea173f9fb6946e17de8c1b44ada3afd08f6eb93cf39dc6eaff046da.exe	sc.exe
PID 1704 wrote to memory of 2668	1704	b71122e4dea173f9fb6946e17de8c1b44ada3afd08f6eb93cf39dc6eaff046da.exe	sc.exe
PID 1704 wrote to memory of 2668	1704	b71122e4dea173f9fb6946e17de8c1b44ada3afd08f6eb93cf39dc6eaff046da.exe	sc.exe
PID 1704 wrote to memory of 2556	1704	b71122e4dea173f9fb6946e17de8c1b44ada3afd08f6eb93cf39dc6eaff046da.exe	sc.exe
PID 1704 wrote to memory of 2556	1704	b71122e4dea173f9fb6946e17de8c1b44ada3afd08f6eb93cf39dc6eaff046da.exe	sc.exe
PID 1704 wrote to memory of 2556	1704	b71122e4dea173f9fb6946e17de8c1b44ada3afd08f6eb93cf39dc6eaff046da.exe	sc.exe
PID 1704 wrote to memory of 2556	1704	b71122e4dea173f9fb6946e17de8c1b44ada3afd08f6eb93cf39dc6eaff046da.exe	sc.exe
PID 1704 wrote to memory of 2612	1704	b71122e4dea173f9fb6946e17de8c1b44ada3afd08f6eb93cf39dc6eaff046da.exe	sc.exe
PID 1704 wrote to memory of 2612	1704	b71122e4dea173f9fb6946e17de8c1b44ada3afd08f6eb93cf39dc6eaff046da.exe	sc.exe
PID 1704 wrote to memory of 2612	1704	b71122e4dea173f9fb6946e17de8c1b44ada3afd08f6eb93cf39dc6eaff046da.exe	sc.exe
PID 1704 wrote to memory of 2612	1704	b71122e4dea173f9fb6946e17de8c1b44ada3afd08f6eb93cf39dc6eaff046da.exe	sc.exe
PID 1704 wrote to memory of 2380	1704	b71122e4dea173f9fb6946e17de8c1b44ada3afd08f6eb93cf39dc6eaff046da.exe	netsh.exe
PID 1704 wrote to memory of 2380	1704	b71122e4dea173f9fb6946e17de8c1b44ada3afd08f6eb93cf39dc6eaff046da.exe	netsh.exe
PID 1704 wrote to memory of 2380	1704	b71122e4dea173f9fb6946e17de8c1b44ada3afd08f6eb93cf39dc6eaff046da.exe	netsh.exe
PID 1704 wrote to memory of 2380	1704	b71122e4dea173f9fb6946e17de8c1b44ada3afd08f6eb93cf39dc6eaff046da.exe	netsh.exe
PID 2436 wrote to memory of 2924	2436	fmpkjddx.exe	svchost.exe
PID 2436 wrote to memory of 2924	2436	fmpkjddx.exe	svchost.exe
PID 2436 wrote to memory of 2924	2436	fmpkjddx.exe	svchost.exe
PID 2436 wrote to memory of 2924	2436	fmpkjddx.exe	svchost.exe
PID 2436 wrote to memory of 2924	2436	fmpkjddx.exe	svchost.exe
PID 2436 wrote to memory of 2924	2436	fmpkjddx.exe	svchost.exe

C:\Users\Admin\AppData\Local\Temp\b71122e4dea173f9fb6946e17de8c1b44ada3afd08f6eb93cf39dc6eaff046da.exe
"C:\Users\Admin\AppData\Local\Temp\b71122e4dea173f9fb6946e17de8c1b44ada3afd08f6eb93cf39dc6eaff046da.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:1704

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\tlskewpn\
2⤵
PID:2996

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\fmpkjddx.exe" C:\Windows\SysWOW64\tlskewpn\
2⤵
PID:2616

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create tlskewpn binPath= "C:\Windows\SysWOW64\tlskewpn\fmpkjddx.exe /d\"C:\Users\Admin\AppData\Local\Temp\b71122e4dea173f9fb6946e17de8c1b44ada3afd08f6eb93cf39dc6eaff046da.exe\"" type= own start= auto DisplayName= "wifi support"
2⤵
- Launches sc.exe
PID:2668

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description tlskewpn "wifi internet conection"
2⤵
- Launches sc.exe
PID:2556

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start tlskewpn
2⤵
- Launches sc.exe
PID:2612

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:2380

C:\Windows\SysWOW64\tlskewpn\fmpkjddx.exe
C:\Windows\SysWOW64\tlskewpn\fmpkjddx.exe /d"C:\Users\Admin\AppData\Local\Temp\b71122e4dea173f9fb6946e17de8c1b44ada3afd08f6eb93cf39dc6eaff046da.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2436

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:2924

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Create or Modify System Process

2

T1543

Windows Service

2

T1543.003

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Create or Modify System Process

2

T1543

Windows Service

2

T1543.003

Defense Evasion

Impair Defenses

2

T1562

Disable or Modify System Firewall

1

T1562.004

Disable or Modify Tools

Modify Registry

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\fmpkjddx.exe

Filesize
12.7MB

MD5
d8e30ef3dfa83f2ab3c0029312749118

SHA1
1952e5d922b168bf12721e7ade6ad5383365c262

SHA256
41c4101e1f7d1a1aa9330f7f4d0cc445249d40ccd46bd4dfa0e3e361f071d933

SHA512
ccc7a1507ab1a5e9e0a872b3e83db244da8e72cab1f5934c76986b8fa181c38247b6c6aca76f8db0cf343938c22dbe1fb94e609a4526b1bed4809f7222f69620

Download Submit
memory/1704-2-0x0000000000220000-0x0000000000233000-memory.dmp

Filesize
76KB

Download
memory/1704-4-0x0000000000400000-0x00000000008F1000-memory.dmp

Filesize
4.9MB

Download
memory/1704-8-0x0000000000400000-0x00000000008F1000-memory.dmp

Filesize
4.9MB

Download
memory/1704-9-0x0000000000220000-0x0000000000233000-memory.dmp

Filesize
76KB

Download
memory/1704-1-0x0000000000D40000-0x0000000000E40000-memory.dmp

Filesize
1024KB

Download
memory/2436-16-0x0000000000400000-0x00000000008F1000-memory.dmp

Filesize
4.9MB

Download
memory/2436-10-0x00000000009E0000-0x0000000000AE0000-memory.dmp

Filesize
1024KB

Download
memory/2436-11-0x0000000000400000-0x00000000008F1000-memory.dmp

Filesize
4.9MB

Download
memory/2924-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2924-12-0x0000000000110000-0x0000000000125000-memory.dmp

Filesize
84KB

Download
memory/2924-15-0x0000000000110000-0x0000000000125000-memory.dmp

Filesize
84KB

Download
memory/2924-19-0x0000000000110000-0x0000000000125000-memory.dmp

Filesize
84KB

Download
memory/2924-20-0x0000000000110000-0x0000000000125000-memory.dmp

Filesize
84KB

Download
memory/2924-21-0x0000000000110000-0x0000000000125000-memory.dmp

Filesize
84KB

Download
memory/2924-22-0x0000000000110000-0x0000000000125000-memory.dmp

Filesize
84KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads