tofsee | 289638ff4cfd284afe4780faa40c63f0c484de2eaabe35f006cbfa7f538fe891

General

Target

433b76b50aff2852f8e7a5071594df71.exe
Size

14.7MB
MD5

433b76b50aff2852f8e7a5071594df71
SHA1

d721a6ffb0c601d9b7209ce0cf0334d9a70b4810
SHA256

289638ff4cfd284afe4780faa40c63f0c484de2eaabe35f006cbfa7f538fe891
SHA512

4b99fa41f4e937f109e9b3564146c12ed63bda8e354c2078a0c5d56af9afb611673a586995fb942efe3514c9c278c972c3610488e12410816e894127fcf08f7a

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:

wzfzozkq.exe

pid process

2768 wzfzozkq.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

2840 svchost.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

wzfzozkq.exe

description pid process target process

PID 2768 set thread context of 2840 2768 wzfzozkq.exe svchost.exe
Launches sc.exe
Sc.exe is a Windows utlilty to control services on the system.

pid	process
2768	wzfzozkq.exe

pid	process
2840	svchost.exe

description	pid	process	target process
PID 2768 set thread context of 2840	2768	wzfzozkq.exe	svchost.exe

Program crash 19 IoCs

Processes:

WerFault.exeWerFault.exeWerFault.exeWerFault.exeWerFault.exeWerFault.exeWerFault.exeWerFault.exeWerFault.exeWerFault.exeWerFault.exeWerFault.exeWerFault.exeWerFault.exeWerFault.exeWerFault.exeWerFault.exeWerFault.exeWerFault.exe

pid	pid_target	process	target process
2960	3084	WerFault.exe	433b76b50aff2852f8e7a5071594df71.exe
4084	3084	WerFault.exe	433b76b50aff2852f8e7a5071594df71.exe
2920	3084	WerFault.exe	433b76b50aff2852f8e7a5071594df71.exe
1276	3084	WerFault.exe	433b76b50aff2852f8e7a5071594df71.exe
700	3084	WerFault.exe	433b76b50aff2852f8e7a5071594df71.exe
2640	3084	WerFault.exe	433b76b50aff2852f8e7a5071594df71.exe
740	3084	WerFault.exe	433b76b50aff2852f8e7a5071594df71.exe
4076	3084	WerFault.exe	433b76b50aff2852f8e7a5071594df71.exe
2176	3084	WerFault.exe	433b76b50aff2852f8e7a5071594df71.exe
4060	3084	WerFault.exe	433b76b50aff2852f8e7a5071594df71.exe
1752	3084	WerFault.exe	433b76b50aff2852f8e7a5071594df71.exe
2576	3084	WerFault.exe	433b76b50aff2852f8e7a5071594df71.exe
4044	3084	WerFault.exe	433b76b50aff2852f8e7a5071594df71.exe
2688	3084	WerFault.exe	433b76b50aff2852f8e7a5071594df71.exe
3256	3084	WerFault.exe	433b76b50aff2852f8e7a5071594df71.exe
2244	3084	WerFault.exe	433b76b50aff2852f8e7a5071594df71.exe
3120	3084	WerFault.exe	433b76b50aff2852f8e7a5071594df71.exe
4040	2768	WerFault.exe	wzfzozkq.exe
3204	2768	WerFault.exe	wzfzozkq.exe

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

433b76b50aff2852f8e7a5071594df71.exewzfzozkq.exe

description	pid	process	target process
PID 3084 wrote to memory of 2756	3084	433b76b50aff2852f8e7a5071594df71.exe	cmd.exe
PID 3084 wrote to memory of 2756	3084	433b76b50aff2852f8e7a5071594df71.exe	cmd.exe
PID 3084 wrote to memory of 2756	3084	433b76b50aff2852f8e7a5071594df71.exe	cmd.exe
PID 3084 wrote to memory of 2156	3084	433b76b50aff2852f8e7a5071594df71.exe	cmd.exe
PID 3084 wrote to memory of 2156	3084	433b76b50aff2852f8e7a5071594df71.exe	cmd.exe
PID 3084 wrote to memory of 2156	3084	433b76b50aff2852f8e7a5071594df71.exe	cmd.exe
PID 3084 wrote to memory of 1852	3084	433b76b50aff2852f8e7a5071594df71.exe	sc.exe
PID 3084 wrote to memory of 1852	3084	433b76b50aff2852f8e7a5071594df71.exe	sc.exe
PID 3084 wrote to memory of 1852	3084	433b76b50aff2852f8e7a5071594df71.exe	sc.exe
PID 3084 wrote to memory of 3520	3084	433b76b50aff2852f8e7a5071594df71.exe	sc.exe
PID 3084 wrote to memory of 3520	3084	433b76b50aff2852f8e7a5071594df71.exe	sc.exe
PID 3084 wrote to memory of 3520	3084	433b76b50aff2852f8e7a5071594df71.exe	sc.exe
PID 3084 wrote to memory of 940	3084	433b76b50aff2852f8e7a5071594df71.exe	sc.exe
PID 3084 wrote to memory of 940	3084	433b76b50aff2852f8e7a5071594df71.exe	sc.exe
PID 3084 wrote to memory of 940	3084	433b76b50aff2852f8e7a5071594df71.exe	sc.exe
PID 3084 wrote to memory of 2180	3084	433b76b50aff2852f8e7a5071594df71.exe	netsh.exe
PID 3084 wrote to memory of 2180	3084	433b76b50aff2852f8e7a5071594df71.exe	netsh.exe
PID 3084 wrote to memory of 2180	3084	433b76b50aff2852f8e7a5071594df71.exe	netsh.exe
PID 2768 wrote to memory of 2840	2768	wzfzozkq.exe	svchost.exe
PID 2768 wrote to memory of 2840	2768	wzfzozkq.exe	svchost.exe
PID 2768 wrote to memory of 2840	2768	wzfzozkq.exe	svchost.exe
PID 2768 wrote to memory of 2840	2768	wzfzozkq.exe	svchost.exe
PID 2768 wrote to memory of 2840	2768	wzfzozkq.exe	svchost.exe

C:\Users\Admin\AppData\Local\Temp\433b76b50aff2852f8e7a5071594df71.exe
"C:\Users\Admin\AppData\Local\Temp\433b76b50aff2852f8e7a5071594df71.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:3084

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 3084 -s 568
2⤵
- Program crash
PID:2960

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 3084 -s 572
2⤵
- Program crash
PID:4084

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 3084 -s 704
2⤵
- Program crash
PID:2920

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 3084 -s 680
2⤵
- Program crash
PID:1276

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 3084 -s 784
2⤵
- Program crash
PID:700

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 3084 -s 804
2⤵
- Program crash
PID:2640

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 3084 -s 952
2⤵
- Program crash
PID:740

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\bnrsamsr\
2⤵
PID:2756

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 3084 -s 836
2⤵
- Program crash
PID:4076

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 3084 -s 700
2⤵
- Program crash
PID:2176

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\wzfzozkq.exe" C:\Windows\SysWOW64\bnrsamsr\
2⤵
PID:2156

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 3084 -s 704
2⤵
- Program crash
PID:4060

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 3084 -s 692
2⤵
- Program crash
PID:1752

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create bnrsamsr binPath= "C:\Windows\SysWOW64\bnrsamsr\wzfzozkq.exe /d\"C:\Users\Admin\AppData\Local\Temp\433b76b50aff2852f8e7a5071594df71.exe\"" type= own start= auto DisplayName= "wifi support"
2⤵
PID:1852

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 3084 -s 732
2⤵
- Program crash
PID:2576

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 3084 -s 704
2⤵
- Program crash
PID:4044

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description bnrsamsr "wifi internet conection"
2⤵
PID:3520

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 3084 -s 1020
2⤵
- Program crash
PID:2688

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 3084 -s 704
2⤵
- Program crash
PID:3256

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start bnrsamsr
2⤵
PID:940

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 3084 -s 688
2⤵
- Program crash
PID:2244

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 3084 -s 520
2⤵
- Program crash
PID:3120

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:2180

C:\Windows\SysWOW64\bnrsamsr\wzfzozkq.exe
C:\Windows\SysWOW64\bnrsamsr\wzfzozkq.exe /d"C:\Users\Admin\AppData\Local\Temp\433b76b50aff2852f8e7a5071594df71.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2768

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 2768 -s 588
2⤵
- Program crash
PID:4040

C:\Windows\SysWOW64\svchost.exe
svchost.exe
2⤵
- Deletes itself
PID:2840

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 2768 -s 588
2⤵
- Program crash
PID:3204

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\wzfzozkq.exe
MD5
71364dc3f1f4fd4b258ea39541264638

SHA1
9a34a0a6d68d2ffbd48deacd08888176d17559ee

SHA256
6b6c6f21b3848190649db21e372769b6523ff1e514ee6c14cee78620f5b7392d

SHA512
7450a2566697435aca2b2c5622923dfa3a7a73a1ea40d73b9cda4f0ff1c543c6b658dfdc99aa1be98f73cef779ed905a23c8855d23959ac807c40b39edbc4783

Download Submit
C:\Windows\SysWOW64\bnrsamsr\wzfzozkq.exe
MD5
71364dc3f1f4fd4b258ea39541264638

SHA1
9a34a0a6d68d2ffbd48deacd08888176d17559ee

SHA256
6b6c6f21b3848190649db21e372769b6523ff1e514ee6c14cee78620f5b7392d

SHA512
7450a2566697435aca2b2c5622923dfa3a7a73a1ea40d73b9cda4f0ff1c543c6b658dfdc99aa1be98f73cef779ed905a23c8855d23959ac807c40b39edbc4783

Download Submit
memory/940-20-0x0000000000000000-mapping.dmp

Download
memory/1852-18-0x0000000000000000-mapping.dmp

Download
memory/2156-16-0x0000000000000000-mapping.dmp

Download
memory/2180-24-0x0000000000000000-mapping.dmp

Download
memory/2756-15-0x0000000000000000-mapping.dmp

Download
memory/2768-23-0x00000000015C0000-0x00000000015C1000-memory.dmp

Filesize
4KB

Download
memory/2840-26-0x0000000000A39A6B-mapping.dmp

Download
memory/2840-25-0x0000000000A30000-0x0000000000A45000-memory.dmp

Filesize
84KB

Download
memory/3084-9-0x0000000002B90000-0x0000000002B91000-memory.dmp

Filesize
4KB

Download
memory/3084-11-0x0000000002B90000-0x0000000002B91000-memory.dmp

Filesize
4KB

Download
memory/3084-10-0x0000000002B90000-0x0000000002B91000-memory.dmp

Filesize
4KB

Download
memory/3084-12-0x0000000002B90000-0x0000000002B91000-memory.dmp

Filesize
4KB

Download
memory/3084-8-0x0000000002B90000-0x0000000002B91000-memory.dmp

Filesize
4KB

Download
memory/3084-7-0x0000000002B90000-0x0000000002B91000-memory.dmp

Filesize
4KB

Download
memory/3084-3-0x0000000002A40000-0x0000000002A41000-memory.dmp

Filesize
4KB

Download
memory/3084-2-0x0000000000E56000-0x0000000000E57000-memory.dmp

Filesize
4KB

Download
memory/3084-14-0x0000000002B90000-0x0000000002B91000-memory.dmp

Filesize
4KB

Download
memory/3084-13-0x0000000002B90000-0x0000000002B91000-memory.dmp

Filesize
4KB

Download
memory/3520-19-0x0000000000000000-mapping.dmp

Download

Analysis

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