tofsee | 388e770957cb4e6e396d8ef4a0cf158a69e3cdeb98157b013e79327013706afe

General

Target

b23ec80dcfd2ee8ad973ac39a4b6488b.exe
Size

13.5MB
MD5

b23ec80dcfd2ee8ad973ac39a4b6488b
SHA1

58a7c7a55442f3f22b61bb94eff369288f8b6392
SHA256

388e770957cb4e6e396d8ef4a0cf158a69e3cdeb98157b013e79327013706afe
SHA512

4f92d9235235702099771a60f5c8ea1fe83dd8dc2dbd05649d353f43de4c54a89249fb513659aad3022688e98cc8dbbe5a3ba144e12eedc3c2c000ca5d8e355d

Score

10^/10

tofsee evasion persistence trojan

Malware Config

Signatures

Tofsee
Backdoor/botnet which carries out malicious activities based on commands from a C2 server.
trojan tofsee
Windows security bypass 2 TTPs
evasion trojan

Disabling Security Tools
T1089

Modify Registry
T1112
Creates new service(s) 1 TTPs
persistence

New Service
T1050
Executes dropped EXE 1 IoCs

Processes:

vdswjhqq.exe

pid process

564 vdswjhqq.exe
Modifies Windows Firewall 1 TTPs
evasion

Modify Existing Service
T1031
Sets service image path in registry 2 TTPs
persistence

Registry Run Keys / Startup Folder
T1060

Modify Registry
T1112
Deletes itself 1 IoCs

Processes:

svchost.exe

pid process

1036 svchost.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

vdswjhqq.exe

description pid process target process

PID 564 set thread context of 1036 564 vdswjhqq.exe svchost.exe
Launches sc.exe
Sc.exe is a Windows utlilty to control services on the system.

pid	process
564	vdswjhqq.exe

pid	process
1036	svchost.exe

description	pid	process	target process
PID 564 set thread context of 1036	564	vdswjhqq.exe	svchost.exe

Suspicious use of WriteProcessMemory 30 IoCs

Processes:

b23ec80dcfd2ee8ad973ac39a4b6488b.exevdswjhqq.exe

description	pid	process	target process
PID 2024 wrote to memory of 1684	2024	b23ec80dcfd2ee8ad973ac39a4b6488b.exe	cmd.exe
PID 2024 wrote to memory of 1684	2024	b23ec80dcfd2ee8ad973ac39a4b6488b.exe	cmd.exe
PID 2024 wrote to memory of 1684	2024	b23ec80dcfd2ee8ad973ac39a4b6488b.exe	cmd.exe
PID 2024 wrote to memory of 1684	2024	b23ec80dcfd2ee8ad973ac39a4b6488b.exe	cmd.exe
PID 2024 wrote to memory of 1752	2024	b23ec80dcfd2ee8ad973ac39a4b6488b.exe	cmd.exe
PID 2024 wrote to memory of 1752	2024	b23ec80dcfd2ee8ad973ac39a4b6488b.exe	cmd.exe
PID 2024 wrote to memory of 1752	2024	b23ec80dcfd2ee8ad973ac39a4b6488b.exe	cmd.exe
PID 2024 wrote to memory of 1752	2024	b23ec80dcfd2ee8ad973ac39a4b6488b.exe	cmd.exe
PID 2024 wrote to memory of 1840	2024	b23ec80dcfd2ee8ad973ac39a4b6488b.exe	sc.exe
PID 2024 wrote to memory of 1840	2024	b23ec80dcfd2ee8ad973ac39a4b6488b.exe	sc.exe
PID 2024 wrote to memory of 1840	2024	b23ec80dcfd2ee8ad973ac39a4b6488b.exe	sc.exe
PID 2024 wrote to memory of 1840	2024	b23ec80dcfd2ee8ad973ac39a4b6488b.exe	sc.exe
PID 2024 wrote to memory of 768	2024	b23ec80dcfd2ee8ad973ac39a4b6488b.exe	sc.exe
PID 2024 wrote to memory of 768	2024	b23ec80dcfd2ee8ad973ac39a4b6488b.exe	sc.exe
PID 2024 wrote to memory of 768	2024	b23ec80dcfd2ee8ad973ac39a4b6488b.exe	sc.exe
PID 2024 wrote to memory of 768	2024	b23ec80dcfd2ee8ad973ac39a4b6488b.exe	sc.exe
PID 2024 wrote to memory of 240	2024	b23ec80dcfd2ee8ad973ac39a4b6488b.exe	sc.exe
PID 2024 wrote to memory of 240	2024	b23ec80dcfd2ee8ad973ac39a4b6488b.exe	sc.exe
PID 2024 wrote to memory of 240	2024	b23ec80dcfd2ee8ad973ac39a4b6488b.exe	sc.exe
PID 2024 wrote to memory of 240	2024	b23ec80dcfd2ee8ad973ac39a4b6488b.exe	sc.exe
PID 2024 wrote to memory of 1068	2024	b23ec80dcfd2ee8ad973ac39a4b6488b.exe	netsh.exe
PID 2024 wrote to memory of 1068	2024	b23ec80dcfd2ee8ad973ac39a4b6488b.exe	netsh.exe
PID 2024 wrote to memory of 1068	2024	b23ec80dcfd2ee8ad973ac39a4b6488b.exe	netsh.exe
PID 2024 wrote to memory of 1068	2024	b23ec80dcfd2ee8ad973ac39a4b6488b.exe	netsh.exe
PID 564 wrote to memory of 1036	564	vdswjhqq.exe	svchost.exe
PID 564 wrote to memory of 1036	564	vdswjhqq.exe	svchost.exe
PID 564 wrote to memory of 1036	564	vdswjhqq.exe	svchost.exe
PID 564 wrote to memory of 1036	564	vdswjhqq.exe	svchost.exe
PID 564 wrote to memory of 1036	564	vdswjhqq.exe	svchost.exe
PID 564 wrote to memory of 1036	564	vdswjhqq.exe	svchost.exe

C:\Users\Admin\AppData\Local\Temp\b23ec80dcfd2ee8ad973ac39a4b6488b.exe
"C:\Users\Admin\AppData\Local\Temp\b23ec80dcfd2ee8ad973ac39a4b6488b.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:2024

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\jtfvybzd\
2⤵
PID:1684

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\vdswjhqq.exe" C:\Windows\SysWOW64\jtfvybzd\
2⤵
PID:1752

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create jtfvybzd binPath= "C:\Windows\SysWOW64\jtfvybzd\vdswjhqq.exe /d\"C:\Users\Admin\AppData\Local\Temp\b23ec80dcfd2ee8ad973ac39a4b6488b.exe\"" type= own start= auto DisplayName= "wifi support"
2⤵
PID:1840

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description jtfvybzd "wifi internet conection"
2⤵
PID:768

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start jtfvybzd
2⤵
PID:240

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⤵
PID:1068

C:\Windows\SysWOW64\jtfvybzd\vdswjhqq.exe
C:\Windows\SysWOW64\jtfvybzd\vdswjhqq.exe /d"C:\Users\Admin\AppData\Local\Temp\b23ec80dcfd2ee8ad973ac39a4b6488b.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:564

C:\Windows\SysWOW64\svchost.exe
svchost.exe
2⤵
- Deletes itself
PID:1036

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

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\vdswjhqq.exe
MD5
c18e564be45ada391e490814b5e60033

SHA1
8c10713675894e4499bbc38eac90f320623cccf1

SHA256
3c71a8c7c1eb564391473b2e8e64ff02977a1255a481cd5612ab5ab7b3abe3ca

SHA512
e822007fc8f9752413de4c0037a520324d71ddf416342a27e3b1c87ddce675676d29d5fb68e9cb21229b2cf0dcb0ebf806aa247906b2a19a89631ce94151da2a

Download Submit
C:\Windows\SysWOW64\jtfvybzd\vdswjhqq.exe
MD5
c18e564be45ada391e490814b5e60033

SHA1
8c10713675894e4499bbc38eac90f320623cccf1

SHA256
3c71a8c7c1eb564391473b2e8e64ff02977a1255a481cd5612ab5ab7b3abe3ca

SHA512
e822007fc8f9752413de4c0037a520324d71ddf416342a27e3b1c87ddce675676d29d5fb68e9cb21229b2cf0dcb0ebf806aa247906b2a19a89631ce94151da2a

Download Submit
memory/240-12-0x0000000000000000-mapping.dmp

Download
memory/564-17-0x0000000004700000-0x0000000004711000-memory.dmp

Filesize
68KB

Download
memory/564-16-0x00000000042AC000-0x00000000042AD000-memory.dmp

Filesize
4KB

Download
memory/768-10-0x0000000000000000-mapping.dmp

Download
memory/1036-19-0x0000000000089A6B-mapping.dmp

Download
memory/1036-18-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/1068-15-0x0000000000000000-mapping.dmp

Download
memory/1684-4-0x0000000000000000-mapping.dmp

Download
memory/1752-5-0x0000000000000000-mapping.dmp

Download
memory/1840-8-0x0000000000000000-mapping.dmp

Download
memory/2024-2-0x000000000421C000-0x000000000421D000-memory.dmp

Filesize
4KB

Download
memory/2024-3-0x0000000005BB0000-0x0000000005BC1000-memory.dmp

Filesize
68KB

Download

Analysis

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