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:

sbtsbnri.exe

pid process

1332 sbtsbnri.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

1148 svchost.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

sbtsbnri.exe

description pid process target process

PID 1332 set thread context of 1148 1332 sbtsbnri.exe svchost.exe
Launches sc.exe
Sc.exe is a Windows utlilty to control services on the system.

pid	process
1332	sbtsbnri.exe

pid	process
1148	svchost.exe

description	pid	process	target process
PID 1332 set thread context of 1148	1332	sbtsbnri.exe	svchost.exe

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

354b570754a39b62f08fa243e04e0ac4.exesbtsbnri.exe

description	pid	process	target process
PID 656 wrote to memory of 2296	656	354b570754a39b62f08fa243e04e0ac4.exe	cmd.exe
PID 656 wrote to memory of 2296	656	354b570754a39b62f08fa243e04e0ac4.exe	cmd.exe
PID 656 wrote to memory of 2296	656	354b570754a39b62f08fa243e04e0ac4.exe	cmd.exe
PID 656 wrote to memory of 3876	656	354b570754a39b62f08fa243e04e0ac4.exe	cmd.exe
PID 656 wrote to memory of 3876	656	354b570754a39b62f08fa243e04e0ac4.exe	cmd.exe
PID 656 wrote to memory of 3876	656	354b570754a39b62f08fa243e04e0ac4.exe	cmd.exe
PID 656 wrote to memory of 3284	656	354b570754a39b62f08fa243e04e0ac4.exe	sc.exe
PID 656 wrote to memory of 3284	656	354b570754a39b62f08fa243e04e0ac4.exe	sc.exe
PID 656 wrote to memory of 3284	656	354b570754a39b62f08fa243e04e0ac4.exe	sc.exe
PID 656 wrote to memory of 196	656	354b570754a39b62f08fa243e04e0ac4.exe	sc.exe
PID 656 wrote to memory of 196	656	354b570754a39b62f08fa243e04e0ac4.exe	sc.exe
PID 656 wrote to memory of 196	656	354b570754a39b62f08fa243e04e0ac4.exe	sc.exe
PID 656 wrote to memory of 424	656	354b570754a39b62f08fa243e04e0ac4.exe	sc.exe
PID 656 wrote to memory of 424	656	354b570754a39b62f08fa243e04e0ac4.exe	sc.exe
PID 656 wrote to memory of 424	656	354b570754a39b62f08fa243e04e0ac4.exe	sc.exe
PID 656 wrote to memory of 1688	656	354b570754a39b62f08fa243e04e0ac4.exe	netsh.exe
PID 656 wrote to memory of 1688	656	354b570754a39b62f08fa243e04e0ac4.exe	netsh.exe
PID 656 wrote to memory of 1688	656	354b570754a39b62f08fa243e04e0ac4.exe	netsh.exe
PID 1332 wrote to memory of 1148	1332	sbtsbnri.exe	svchost.exe
PID 1332 wrote to memory of 1148	1332	sbtsbnri.exe	svchost.exe
PID 1332 wrote to memory of 1148	1332	sbtsbnri.exe	svchost.exe
PID 1332 wrote to memory of 1148	1332	sbtsbnri.exe	svchost.exe
PID 1332 wrote to memory of 1148	1332	sbtsbnri.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:656

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\gbusfnda\
2⤵
PID:2296

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\sbtsbnri.exe" C:\Windows\SysWOW64\gbusfnda\
2⤵
PID:3876

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create gbusfnda binPath= "C:\Windows\SysWOW64\gbusfnda\sbtsbnri.exe /d\"C:\Users\Admin\AppData\Local\Temp\354b570754a39b62f08fa243e04e0ac4.exe\"" type= own start= auto DisplayName= "wifi support"
2⤵
PID:3284

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description gbusfnda "wifi internet conection"
2⤵
PID:196

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start gbusfnda
2⤵
PID:424

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:1688

C:\Windows\SysWOW64\gbusfnda\sbtsbnri.exe
C:\Windows\SysWOW64\gbusfnda\sbtsbnri.exe /d"C:\Users\Admin\AppData\Local\Temp\354b570754a39b62f08fa243e04e0ac4.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1332

C:\Windows\SysWOW64\svchost.exe
svchost.exe
2⤵
- Deletes itself
PID:1148

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\sbtsbnri.exe
MD5
52398eaaf4e546d11e5dd1a2f39f4e2d

SHA1
a215b31e311853c7613d7b70e7de68602184b658

SHA256
f1a70598441e7dd48c1a5ec3772b52267a242027d334e445a67bb98e1d6499f0

SHA512
93fae9257d297e4aea7f2ab291650113304dfdf1c998c7a624dd3a66f7f9d6adf3e56a08885f40dce5236dd1d8ee56a5abe69134ece280adb6f521d00f3f8d7b

Download Submit
C:\Windows\SysWOW64\gbusfnda\sbtsbnri.exe
MD5
52398eaaf4e546d11e5dd1a2f39f4e2d

SHA1
a215b31e311853c7613d7b70e7de68602184b658

SHA256
f1a70598441e7dd48c1a5ec3772b52267a242027d334e445a67bb98e1d6499f0

SHA512
93fae9257d297e4aea7f2ab291650113304dfdf1c998c7a624dd3a66f7f9d6adf3e56a08885f40dce5236dd1d8ee56a5abe69134ece280adb6f521d00f3f8d7b

Download Submit
memory/196-6-0x0000000000000000-mapping.dmp

Download
memory/424-7-0x0000000000000000-mapping.dmp

Download
memory/1148-10-0x0000000000B00000-0x0000000000B15000-memory.dmp

Filesize
84KB

Download
memory/1148-11-0x0000000000B09A6B-mapping.dmp

Download
memory/1148-12-0x0000000000B00000-0x0000000000B15000-memory.dmp

Filesize
84KB

Download
memory/1688-8-0x0000000000000000-mapping.dmp

Download
memory/2296-2-0x0000000000000000-mapping.dmp

Download
memory/3284-5-0x0000000000000000-mapping.dmp

Download
memory/3876-3-0x0000000000000000-mapping.dmp

Download

Analysis

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