tofsee | 65b06139254e9d7ad3e56e67b498473d31abb7e8b9a32a1a537fd9ec607232ff

General

Target

354b570754a39b62f08fa243e04e0ac4.exe
Size

11.8MB
MD5

354b570754a39b62f08fa243e04e0ac4
SHA1

9662324cd2f8a2f1600ba42b64cf14b30d05b57f
SHA256

65b06139254e9d7ad3e56e67b498473d31abb7e8b9a32a1a537fd9ec607232ff
SHA512

b5e315aaec0e8b6d4968110cbb73d344a371410e6d7b879145156895823eeed9fda7430c39a2b9f87451fb70fc44d41bfd6e651d11d53cbe70637134f0dd24b6

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:

fvbuvdtc.exe

pid process

964 fvbuvdtc.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

1060 svchost.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

fvbuvdtc.exe

description pid process target process

PID 964 set thread context of 1060 964 fvbuvdtc.exe svchost.exe
Launches sc.exe
Sc.exe is a Windows utlilty to control services on the system.

pid	process
964	fvbuvdtc.exe

pid	process
1060	svchost.exe

description	pid	process	target process
PID 964 set thread context of 1060	964	fvbuvdtc.exe	svchost.exe

Suspicious use of WriteProcessMemory 30 IoCs

Processes:

354b570754a39b62f08fa243e04e0ac4.exefvbuvdtc.exe

description	pid	process	target process
PID 1828 wrote to memory of 1984	1828	354b570754a39b62f08fa243e04e0ac4.exe	cmd.exe
PID 1828 wrote to memory of 1984	1828	354b570754a39b62f08fa243e04e0ac4.exe	cmd.exe
PID 1828 wrote to memory of 1984	1828	354b570754a39b62f08fa243e04e0ac4.exe	cmd.exe
PID 1828 wrote to memory of 1984	1828	354b570754a39b62f08fa243e04e0ac4.exe	cmd.exe
PID 1828 wrote to memory of 1416	1828	354b570754a39b62f08fa243e04e0ac4.exe	cmd.exe
PID 1828 wrote to memory of 1416	1828	354b570754a39b62f08fa243e04e0ac4.exe	cmd.exe
PID 1828 wrote to memory of 1416	1828	354b570754a39b62f08fa243e04e0ac4.exe	cmd.exe
PID 1828 wrote to memory of 1416	1828	354b570754a39b62f08fa243e04e0ac4.exe	cmd.exe
PID 1828 wrote to memory of 616	1828	354b570754a39b62f08fa243e04e0ac4.exe	sc.exe
PID 1828 wrote to memory of 616	1828	354b570754a39b62f08fa243e04e0ac4.exe	sc.exe
PID 1828 wrote to memory of 616	1828	354b570754a39b62f08fa243e04e0ac4.exe	sc.exe
PID 1828 wrote to memory of 616	1828	354b570754a39b62f08fa243e04e0ac4.exe	sc.exe
PID 1828 wrote to memory of 1728	1828	354b570754a39b62f08fa243e04e0ac4.exe	sc.exe
PID 1828 wrote to memory of 1728	1828	354b570754a39b62f08fa243e04e0ac4.exe	sc.exe
PID 1828 wrote to memory of 1728	1828	354b570754a39b62f08fa243e04e0ac4.exe	sc.exe
PID 1828 wrote to memory of 1728	1828	354b570754a39b62f08fa243e04e0ac4.exe	sc.exe
PID 1828 wrote to memory of 1032	1828	354b570754a39b62f08fa243e04e0ac4.exe	sc.exe
PID 1828 wrote to memory of 1032	1828	354b570754a39b62f08fa243e04e0ac4.exe	sc.exe
PID 1828 wrote to memory of 1032	1828	354b570754a39b62f08fa243e04e0ac4.exe	sc.exe
PID 1828 wrote to memory of 1032	1828	354b570754a39b62f08fa243e04e0ac4.exe	sc.exe
PID 1828 wrote to memory of 1896	1828	354b570754a39b62f08fa243e04e0ac4.exe	netsh.exe
PID 1828 wrote to memory of 1896	1828	354b570754a39b62f08fa243e04e0ac4.exe	netsh.exe
PID 1828 wrote to memory of 1896	1828	354b570754a39b62f08fa243e04e0ac4.exe	netsh.exe
PID 1828 wrote to memory of 1896	1828	354b570754a39b62f08fa243e04e0ac4.exe	netsh.exe
PID 964 wrote to memory of 1060	964	fvbuvdtc.exe	svchost.exe
PID 964 wrote to memory of 1060	964	fvbuvdtc.exe	svchost.exe
PID 964 wrote to memory of 1060	964	fvbuvdtc.exe	svchost.exe
PID 964 wrote to memory of 1060	964	fvbuvdtc.exe	svchost.exe
PID 964 wrote to memory of 1060	964	fvbuvdtc.exe	svchost.exe
PID 964 wrote to memory of 1060	964	fvbuvdtc.exe	svchost.exe

C:\Users\Admin\AppData\Local\Temp\354b570754a39b62f08fa243e04e0ac4.exe
"C:\Users\Admin\AppData\Local\Temp\354b570754a39b62f08fa243e04e0ac4.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:1828

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\lbmnfxfj\
2⤵
PID:1984

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\fvbuvdtc.exe" C:\Windows\SysWOW64\lbmnfxfj\
2⤵
PID:1416

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create lbmnfxfj binPath= "C:\Windows\SysWOW64\lbmnfxfj\fvbuvdtc.exe /d\"C:\Users\Admin\AppData\Local\Temp\354b570754a39b62f08fa243e04e0ac4.exe\"" type= own start= auto DisplayName= "wifi support"
2⤵
PID:616

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description lbmnfxfj "wifi internet conection"
2⤵
PID:1728

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start lbmnfxfj
2⤵
PID:1032

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:1896

C:\Windows\SysWOW64\lbmnfxfj\fvbuvdtc.exe
C:\Windows\SysWOW64\lbmnfxfj\fvbuvdtc.exe /d"C:\Users\Admin\AppData\Local\Temp\354b570754a39b62f08fa243e04e0ac4.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:964

C:\Windows\SysWOW64\svchost.exe
svchost.exe
2⤵
- Deletes itself
PID:1060

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\fvbuvdtc.exe
MD5
77d8358d1ee1b69d1ef3bf0ce33bab0e

SHA1
f8b43049e4bed39b28c12811aca759ea39d77d08

SHA256
4da07eef0d5ec4e818795fa22e40db17f3eaa953b8d3f25ec28e85249536626c

SHA512
cae8067d0c0f45b7f174535962700333f1331365d89ee569ca048786a940c0e159f43aecf466d966c37fd526f1d813e2f6d4fedbc9bab4413a0c027eee51de53

Download Submit
C:\Windows\SysWOW64\lbmnfxfj\fvbuvdtc.exe
MD5
77d8358d1ee1b69d1ef3bf0ce33bab0e

SHA1
f8b43049e4bed39b28c12811aca759ea39d77d08

SHA256
4da07eef0d5ec4e818795fa22e40db17f3eaa953b8d3f25ec28e85249536626c

SHA512
cae8067d0c0f45b7f174535962700333f1331365d89ee569ca048786a940c0e159f43aecf466d966c37fd526f1d813e2f6d4fedbc9bab4413a0c027eee51de53

Download Submit
memory/616-5-0x0000000000000000-mapping.dmp

Download
memory/1032-7-0x0000000000000000-mapping.dmp

Download
memory/1060-11-0x0000000000089A6B-mapping.dmp

Download
memory/1060-10-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/1416-3-0x0000000000000000-mapping.dmp

Download
memory/1728-6-0x0000000000000000-mapping.dmp

Download
memory/1896-8-0x0000000000000000-mapping.dmp

Download
memory/1984-2-0x0000000000000000-mapping.dmp

Download

Analysis

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