tofsee | 53240ff0a9160c77159782458342eb971f6b6b0a8a94733f878a6fe90c1661c9

General

Target

bafc60c6400d1952143edd3ca50ee960.exe
Size

14.2MB
MD5

bafc60c6400d1952143edd3ca50ee960
SHA1

29e68429e3b2e5c80e8657f27cbd12873e17ce10
SHA256

53240ff0a9160c77159782458342eb971f6b6b0a8a94733f878a6fe90c1661c9
SHA512

047e8852afd1f3f6520c45a4cda89fab06d3c5f6436886b224a269d224844d4f473a739cf22b5a0a2f0008c2ef64aa46fd60347519a452ff5c83615e225a4c20

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:

uutzkyfi.exe

pid process

568 uutzkyfi.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

1332 svchost.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:

uutzkyfi.exe

description pid process target process

PID 568 set thread context of 1332 568 uutzkyfi.exe svchost.exe
Launches sc.exe
Sc.exe is a Windows utlilty to control services on the system.

pid	process
568	uutzkyfi.exe

pid	process
1332	svchost.exe

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

description	pid	process	target process
PID 568 set thread context of 1332	568	uutzkyfi.exe	svchost.exe

Modifies data under HKEY_USERS 2 IoCs

Processes:

svchost.exe

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

Suspicious use of WriteProcessMemory 30 IoCs

Processes:

bafc60c6400d1952143edd3ca50ee960.exeuutzkyfi.exe

description	pid	process	target process
PID 2012 wrote to memory of 1268	2012	bafc60c6400d1952143edd3ca50ee960.exe	cmd.exe
PID 2012 wrote to memory of 1268	2012	bafc60c6400d1952143edd3ca50ee960.exe	cmd.exe
PID 2012 wrote to memory of 1268	2012	bafc60c6400d1952143edd3ca50ee960.exe	cmd.exe
PID 2012 wrote to memory of 1268	2012	bafc60c6400d1952143edd3ca50ee960.exe	cmd.exe
PID 2012 wrote to memory of 1624	2012	bafc60c6400d1952143edd3ca50ee960.exe	cmd.exe
PID 2012 wrote to memory of 1624	2012	bafc60c6400d1952143edd3ca50ee960.exe	cmd.exe
PID 2012 wrote to memory of 1624	2012	bafc60c6400d1952143edd3ca50ee960.exe	cmd.exe
PID 2012 wrote to memory of 1624	2012	bafc60c6400d1952143edd3ca50ee960.exe	cmd.exe
PID 2012 wrote to memory of 1792	2012	bafc60c6400d1952143edd3ca50ee960.exe	sc.exe
PID 2012 wrote to memory of 1792	2012	bafc60c6400d1952143edd3ca50ee960.exe	sc.exe
PID 2012 wrote to memory of 1792	2012	bafc60c6400d1952143edd3ca50ee960.exe	sc.exe
PID 2012 wrote to memory of 1792	2012	bafc60c6400d1952143edd3ca50ee960.exe	sc.exe
PID 2012 wrote to memory of 1756	2012	bafc60c6400d1952143edd3ca50ee960.exe	sc.exe
PID 2012 wrote to memory of 1756	2012	bafc60c6400d1952143edd3ca50ee960.exe	sc.exe
PID 2012 wrote to memory of 1756	2012	bafc60c6400d1952143edd3ca50ee960.exe	sc.exe
PID 2012 wrote to memory of 1756	2012	bafc60c6400d1952143edd3ca50ee960.exe	sc.exe
PID 2012 wrote to memory of 1896	2012	bafc60c6400d1952143edd3ca50ee960.exe	sc.exe
PID 2012 wrote to memory of 1896	2012	bafc60c6400d1952143edd3ca50ee960.exe	sc.exe
PID 2012 wrote to memory of 1896	2012	bafc60c6400d1952143edd3ca50ee960.exe	sc.exe
PID 2012 wrote to memory of 1896	2012	bafc60c6400d1952143edd3ca50ee960.exe	sc.exe
PID 568 wrote to memory of 1332	568	uutzkyfi.exe	svchost.exe
PID 568 wrote to memory of 1332	568	uutzkyfi.exe	svchost.exe
PID 568 wrote to memory of 1332	568	uutzkyfi.exe	svchost.exe
PID 568 wrote to memory of 1332	568	uutzkyfi.exe	svchost.exe
PID 568 wrote to memory of 1332	568	uutzkyfi.exe	svchost.exe
PID 568 wrote to memory of 1332	568	uutzkyfi.exe	svchost.exe
PID 2012 wrote to memory of 824	2012	bafc60c6400d1952143edd3ca50ee960.exe	netsh.exe
PID 2012 wrote to memory of 824	2012	bafc60c6400d1952143edd3ca50ee960.exe	netsh.exe
PID 2012 wrote to memory of 824	2012	bafc60c6400d1952143edd3ca50ee960.exe	netsh.exe
PID 2012 wrote to memory of 824	2012	bafc60c6400d1952143edd3ca50ee960.exe	netsh.exe

C:\Users\Admin\AppData\Local\Temp\bafc60c6400d1952143edd3ca50ee960.exe
"C:\Users\Admin\AppData\Local\Temp\bafc60c6400d1952143edd3ca50ee960.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:2012

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\ftassgcz\
2⤵
PID:1268

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\uutzkyfi.exe" C:\Windows\SysWOW64\ftassgcz\
2⤵
PID:1624

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create ftassgcz binPath= "C:\Windows\SysWOW64\ftassgcz\uutzkyfi.exe /d\"C:\Users\Admin\AppData\Local\Temp\bafc60c6400d1952143edd3ca50ee960.exe\"" type= own start= auto DisplayName= "wifi support"
2⤵
PID:1792

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description ftassgcz "wifi internet conection"
2⤵
PID:1756

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start ftassgcz
2⤵
PID:1896

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:824

C:\Windows\SysWOW64\ftassgcz\uutzkyfi.exe
C:\Windows\SysWOW64\ftassgcz\uutzkyfi.exe /d"C:\Users\Admin\AppData\Local\Temp\bafc60c6400d1952143edd3ca50ee960.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:568

C:\Windows\SysWOW64\svchost.exe
svchost.exe
2⤵
- Deletes itself
- Drops file in System32 directory
- Modifies data under HKEY_USERS
PID:1332

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

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\uutzkyfi.exe
MD5
0bd13ead73fd1d6e5b77d460c4182e25

SHA1
eed385d9ac286870af40dd6a66595a94a5867af2

SHA256
4a7c753b1ea63f8b130b809559da6a5109cccd4a99c781332b0ed01a649df7a8

SHA512
9c1a18a57e08a4697e62ce80a7618172e18b8f660b2052adc2b024b731fde261a6877e3e980aa5b4aa81b8b240ba8be696171e6b4c3ff35b2dba1a613ab53da3

Download Submit
C:\Windows\SysWOW64\ftassgcz\uutzkyfi.exe
MD5
0bd13ead73fd1d6e5b77d460c4182e25

SHA1
eed385d9ac286870af40dd6a66595a94a5867af2

SHA256
4a7c753b1ea63f8b130b809559da6a5109cccd4a99c781332b0ed01a649df7a8

SHA512
9c1a18a57e08a4697e62ce80a7618172e18b8f660b2052adc2b024b731fde261a6877e3e980aa5b4aa81b8b240ba8be696171e6b4c3ff35b2dba1a613ab53da3

Download Submit
memory/824-12-0x0000000000000000-mapping.dmp

Download
memory/1268-2-0x0000000000000000-mapping.dmp

Download
memory/1332-9-0x00000000000D0000-0x00000000000E5000-memory.dmp

Filesize
84KB

Download
memory/1332-10-0x00000000000D9A6B-mapping.dmp

Download
memory/1624-3-0x0000000000000000-mapping.dmp

Download
memory/1756-6-0x0000000000000000-mapping.dmp

Download
memory/1792-5-0x0000000000000000-mapping.dmp

Download
memory/1896-7-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing