tofsee | e78965bb611ca20f0dd54e20a28a4edb801aa2cd07bc2acf21386979df7a0a8e

General

Target

06638a7f94e86279d3188c9d02d54029.exe
Size

13.4MB
MD5

06638a7f94e86279d3188c9d02d54029
SHA1

985ec19800fbf08a21780792671f5359da739ed6
SHA256

e78965bb611ca20f0dd54e20a28a4edb801aa2cd07bc2acf21386979df7a0a8e
SHA512

6f9839849f8bca21d5d2b431b8d6bda772d00846f104fffe77eb7bd80a094822b8c23bf316315dc8a9afe561d8e5e1c727e873a2f2443cd50ab17301e952cdba

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:

tyllondi.exe

pid process

4016 tyllondi.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

1644 svchost.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

tyllondi.exe

description pid process target process

PID 4016 set thread context of 1644 4016 tyllondi.exe svchost.exe
Launches sc.exe
Sc.exe is a Windows utlilty to control services on the system.

pid	process
4016	tyllondi.exe

pid	process
1644	svchost.exe

description	pid	process	target process
PID 4016 set thread context of 1644	4016	tyllondi.exe	svchost.exe

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

06638a7f94e86279d3188c9d02d54029.exetyllondi.exe

description	pid	process	target process
PID 972 wrote to memory of 640	972	06638a7f94e86279d3188c9d02d54029.exe	cmd.exe
PID 972 wrote to memory of 640	972	06638a7f94e86279d3188c9d02d54029.exe	cmd.exe
PID 972 wrote to memory of 640	972	06638a7f94e86279d3188c9d02d54029.exe	cmd.exe
PID 972 wrote to memory of 3340	972	06638a7f94e86279d3188c9d02d54029.exe	cmd.exe
PID 972 wrote to memory of 3340	972	06638a7f94e86279d3188c9d02d54029.exe	cmd.exe
PID 972 wrote to memory of 3340	972	06638a7f94e86279d3188c9d02d54029.exe	cmd.exe
PID 972 wrote to memory of 4004	972	06638a7f94e86279d3188c9d02d54029.exe	sc.exe
PID 972 wrote to memory of 4004	972	06638a7f94e86279d3188c9d02d54029.exe	sc.exe
PID 972 wrote to memory of 4004	972	06638a7f94e86279d3188c9d02d54029.exe	sc.exe
PID 972 wrote to memory of 3772	972	06638a7f94e86279d3188c9d02d54029.exe	sc.exe
PID 972 wrote to memory of 3772	972	06638a7f94e86279d3188c9d02d54029.exe	sc.exe
PID 972 wrote to memory of 3772	972	06638a7f94e86279d3188c9d02d54029.exe	sc.exe
PID 972 wrote to memory of 3404	972	06638a7f94e86279d3188c9d02d54029.exe	sc.exe
PID 972 wrote to memory of 3404	972	06638a7f94e86279d3188c9d02d54029.exe	sc.exe
PID 972 wrote to memory of 3404	972	06638a7f94e86279d3188c9d02d54029.exe	sc.exe
PID 972 wrote to memory of 3732	972	06638a7f94e86279d3188c9d02d54029.exe	netsh.exe
PID 972 wrote to memory of 3732	972	06638a7f94e86279d3188c9d02d54029.exe	netsh.exe
PID 972 wrote to memory of 3732	972	06638a7f94e86279d3188c9d02d54029.exe	netsh.exe
PID 4016 wrote to memory of 1644	4016	tyllondi.exe	svchost.exe
PID 4016 wrote to memory of 1644	4016	tyllondi.exe	svchost.exe
PID 4016 wrote to memory of 1644	4016	tyllondi.exe	svchost.exe
PID 4016 wrote to memory of 1644	4016	tyllondi.exe	svchost.exe
PID 4016 wrote to memory of 1644	4016	tyllondi.exe	svchost.exe

C:\Users\Admin\AppData\Local\Temp\06638a7f94e86279d3188c9d02d54029.exe
"C:\Users\Admin\AppData\Local\Temp\06638a7f94e86279d3188c9d02d54029.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:972

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\ucgefvmj\
2⤵
PID:640

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\tyllondi.exe" C:\Windows\SysWOW64\ucgefvmj\
2⤵
PID:3340

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create ucgefvmj binPath= "C:\Windows\SysWOW64\ucgefvmj\tyllondi.exe /d\"C:\Users\Admin\AppData\Local\Temp\06638a7f94e86279d3188c9d02d54029.exe\"" type= own start= auto DisplayName= "wifi support"
2⤵
PID:4004

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description ucgefvmj "wifi internet conection"
2⤵
PID:3772

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start ucgefvmj
2⤵
PID:3404

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:3732

C:\Windows\SysWOW64\ucgefvmj\tyllondi.exe
C:\Windows\SysWOW64\ucgefvmj\tyllondi.exe /d"C:\Users\Admin\AppData\Local\Temp\06638a7f94e86279d3188c9d02d54029.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4016

C:\Windows\SysWOW64\svchost.exe
svchost.exe
2⤵
- Deletes itself
PID:1644

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\tyllondi.exe
MD5
201bf7fe3f145508e81ec8d897df2d29

SHA1
8a65eea55e7b3a21ab9d652b5eaad1be88a9e8f6

SHA256
ff0d200949c7f5c4f30ec582bf579fdadf27dfd1e5e53d9462f54b63c7ef9bdd

SHA512
2f3744eb56b03d6dccf060e582be6ad3beb3dec61a13a946bd48cddbfd6621e817a29dc5b4ceec71d30663847609c950eaeae5861871b844f627a93440203d60

Download Submit
C:\Windows\SysWOW64\ucgefvmj\tyllondi.exe
MD5
201bf7fe3f145508e81ec8d897df2d29

SHA1
8a65eea55e7b3a21ab9d652b5eaad1be88a9e8f6

SHA256
ff0d200949c7f5c4f30ec582bf579fdadf27dfd1e5e53d9462f54b63c7ef9bdd

SHA512
2f3744eb56b03d6dccf060e582be6ad3beb3dec61a13a946bd48cddbfd6621e817a29dc5b4ceec71d30663847609c950eaeae5861871b844f627a93440203d60

Download Submit
memory/640-2-0x0000000000000000-mapping.dmp

Download
memory/1644-10-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/1644-11-0x0000000000409A6B-mapping.dmp

Download
memory/3340-3-0x0000000000000000-mapping.dmp

Download
memory/3404-7-0x0000000000000000-mapping.dmp

Download
memory/3732-8-0x0000000000000000-mapping.dmp

Download
memory/3772-6-0x0000000000000000-mapping.dmp

Download
memory/4004-5-0x0000000000000000-mapping.dmp

Download

Analysis

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