tofsee | 39e2b92059aea92f0cef66384347db789668df9ba87067a21060b6fdf7da7bc9

General

Target

39e2b92059aea92f0cef66384347db789668df9ba87067a21060b6fdf7da7bc9.exe
Size

312KB
MD5

469c2f23c85976e2d7a79c013b87121b
SHA1

a98f1b95299a2546aca7e959b9af97eed341a01b
SHA256

39e2b92059aea92f0cef66384347db789668df9ba87067a21060b6fdf7da7bc9
SHA512

1ef5fdeb5f0fd3872d351c93c661fdebc504cec452ff9e00ab3abc7a84aea0be9ba3d2de52e7c3c900b67b55d95c2422d0cdc2ed16ada940a4f662ac884559c9

Score

10^/10

tofsee evasion persistence trojan

Malware Config

Extracted

Family

tofsee

C2

43.231.4.7

lazystax.ru

Signatures

Tofsee
Backdoor/botnet which carries out malicious activities based on commands from a C2 server.
trojan tofsee

Windows security bypass 2 TTPs 1 IoCs

evasion trojan

Disabling Security Tools

T1089

Modify Registry

T1112

Processes:

svchost.exe

description	ioc	process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths\C:\Windows\SysWOW64\cezwvxir = "0"	svchost.exe

Creates new service(s) 1 TTPs
persistence

New Service
T1050
Executes dropped EXE 1 IoCs

Processes:

ttsyjxeh.exe

pid process

1728 ttsyjxeh.exe
Modifies Windows Firewall 1 TTPs 1 IoCs
evasion

Modify Existing Service
T1031

Processes:

netsh.exe

pid process

1220 netsh.exe

pid	process
1728	ttsyjxeh.exe

pid	process
1220	netsh.exe

Sets service image path in registry 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

svchost.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\cezwvxir\ImagePath = "C:\\Windows\\SysWOW64\\cezwvxir\\ttsyjxeh.exe"	svchost.exe

Deletes itself 1 IoCs

Processes:

svchost.exe

pid process

1852 svchost.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

ttsyjxeh.exe

description pid process target process

PID 1728 set thread context of 1852 1728 ttsyjxeh.exe svchost.exe
Launches sc.exe 3 IoCs
Sc.exe is a Windows utlilty to control services on the system.

Processes:

sc.exesc.exesc.exe

pid process

1064 sc.exe
2020 sc.exe
472 sc.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

pid	process
1852	svchost.exe

description	pid	process	target process
PID 1728 set thread context of 1852	1728	ttsyjxeh.exe	svchost.exe

pid	process
1064	sc.exe
2020	sc.exe
472	sc.exe

Suspicious use of WriteProcessMemory 30 IoCs

Processes:

39e2b92059aea92f0cef66384347db789668df9ba87067a21060b6fdf7da7bc9.exettsyjxeh.exe

description	pid	process	target process
PID 1984 wrote to memory of 1456	1984	39e2b92059aea92f0cef66384347db789668df9ba87067a21060b6fdf7da7bc9.exe	cmd.exe
PID 1984 wrote to memory of 1456	1984	39e2b92059aea92f0cef66384347db789668df9ba87067a21060b6fdf7da7bc9.exe	cmd.exe
PID 1984 wrote to memory of 1456	1984	39e2b92059aea92f0cef66384347db789668df9ba87067a21060b6fdf7da7bc9.exe	cmd.exe
PID 1984 wrote to memory of 1456	1984	39e2b92059aea92f0cef66384347db789668df9ba87067a21060b6fdf7da7bc9.exe	cmd.exe
PID 1984 wrote to memory of 1124	1984	39e2b92059aea92f0cef66384347db789668df9ba87067a21060b6fdf7da7bc9.exe	cmd.exe
PID 1984 wrote to memory of 1124	1984	39e2b92059aea92f0cef66384347db789668df9ba87067a21060b6fdf7da7bc9.exe	cmd.exe
PID 1984 wrote to memory of 1124	1984	39e2b92059aea92f0cef66384347db789668df9ba87067a21060b6fdf7da7bc9.exe	cmd.exe
PID 1984 wrote to memory of 1124	1984	39e2b92059aea92f0cef66384347db789668df9ba87067a21060b6fdf7da7bc9.exe	cmd.exe
PID 1984 wrote to memory of 1064	1984	39e2b92059aea92f0cef66384347db789668df9ba87067a21060b6fdf7da7bc9.exe	sc.exe
PID 1984 wrote to memory of 1064	1984	39e2b92059aea92f0cef66384347db789668df9ba87067a21060b6fdf7da7bc9.exe	sc.exe
PID 1984 wrote to memory of 1064	1984	39e2b92059aea92f0cef66384347db789668df9ba87067a21060b6fdf7da7bc9.exe	sc.exe
PID 1984 wrote to memory of 1064	1984	39e2b92059aea92f0cef66384347db789668df9ba87067a21060b6fdf7da7bc9.exe	sc.exe
PID 1984 wrote to memory of 2020	1984	39e2b92059aea92f0cef66384347db789668df9ba87067a21060b6fdf7da7bc9.exe	sc.exe
PID 1984 wrote to memory of 2020	1984	39e2b92059aea92f0cef66384347db789668df9ba87067a21060b6fdf7da7bc9.exe	sc.exe
PID 1984 wrote to memory of 2020	1984	39e2b92059aea92f0cef66384347db789668df9ba87067a21060b6fdf7da7bc9.exe	sc.exe
PID 1984 wrote to memory of 2020	1984	39e2b92059aea92f0cef66384347db789668df9ba87067a21060b6fdf7da7bc9.exe	sc.exe
PID 1984 wrote to memory of 472	1984	39e2b92059aea92f0cef66384347db789668df9ba87067a21060b6fdf7da7bc9.exe	sc.exe
PID 1984 wrote to memory of 472	1984	39e2b92059aea92f0cef66384347db789668df9ba87067a21060b6fdf7da7bc9.exe	sc.exe
PID 1984 wrote to memory of 472	1984	39e2b92059aea92f0cef66384347db789668df9ba87067a21060b6fdf7da7bc9.exe	sc.exe
PID 1984 wrote to memory of 472	1984	39e2b92059aea92f0cef66384347db789668df9ba87067a21060b6fdf7da7bc9.exe	sc.exe
PID 1984 wrote to memory of 1220	1984	39e2b92059aea92f0cef66384347db789668df9ba87067a21060b6fdf7da7bc9.exe	netsh.exe
PID 1984 wrote to memory of 1220	1984	39e2b92059aea92f0cef66384347db789668df9ba87067a21060b6fdf7da7bc9.exe	netsh.exe
PID 1984 wrote to memory of 1220	1984	39e2b92059aea92f0cef66384347db789668df9ba87067a21060b6fdf7da7bc9.exe	netsh.exe
PID 1984 wrote to memory of 1220	1984	39e2b92059aea92f0cef66384347db789668df9ba87067a21060b6fdf7da7bc9.exe	netsh.exe
PID 1728 wrote to memory of 1852	1728	ttsyjxeh.exe	svchost.exe
PID 1728 wrote to memory of 1852	1728	ttsyjxeh.exe	svchost.exe
PID 1728 wrote to memory of 1852	1728	ttsyjxeh.exe	svchost.exe
PID 1728 wrote to memory of 1852	1728	ttsyjxeh.exe	svchost.exe
PID 1728 wrote to memory of 1852	1728	ttsyjxeh.exe	svchost.exe
PID 1728 wrote to memory of 1852	1728	ttsyjxeh.exe	svchost.exe

C:\Users\Admin\AppData\Local\Temp\39e2b92059aea92f0cef66384347db789668df9ba87067a21060b6fdf7da7bc9.exe
"C:\Users\Admin\AppData\Local\Temp\39e2b92059aea92f0cef66384347db789668df9ba87067a21060b6fdf7da7bc9.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:1984

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\cezwvxir\
2⤵
PID:1456

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\ttsyjxeh.exe" C:\Windows\SysWOW64\cezwvxir\
2⤵
PID:1124

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create cezwvxir binPath= "C:\Windows\SysWOW64\cezwvxir\ttsyjxeh.exe /d\"C:\Users\Admin\AppData\Local\Temp\39e2b92059aea92f0cef66384347db789668df9ba87067a21060b6fdf7da7bc9.exe\"" type= own start= auto DisplayName= "wifi support"
2⤵
- Launches sc.exe
PID:1064

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description cezwvxir "wifi internet conection"
2⤵
- Launches sc.exe
PID:2020

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start cezwvxir
2⤵
- Launches sc.exe
PID:472

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⤵
- Modifies Windows Firewall
PID:1220

C:\Windows\SysWOW64\cezwvxir\ttsyjxeh.exe
C:\Windows\SysWOW64\cezwvxir\ttsyjxeh.exe /d"C:\Users\Admin\AppData\Local\Temp\39e2b92059aea92f0cef66384347db789668df9ba87067a21060b6fdf7da7bc9.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1728

C:\Windows\SysWOW64\svchost.exe
svchost.exe
2⤵
- Windows security bypass
- Sets service image path in registry
- Deletes itself
PID:1852

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

System Information Discovery

1

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\ttsyjxeh.exe
Filesize
14.8MB

MD5
d346cbc80c367424b291e61c2f3e40af

SHA1
75fdfc7c95a02b68f5a8e08211bbadc1c0597be4

SHA256
894d42021c3372c994e6f8522a27b56d0d782f07df6cfd86b28cb26132505b3a

SHA512
1b9b258fb14ef642f85ecec1e116d5b938e08159535e2b6e71042f70bb9e0a901cef1faf5ceb7b89832f731ccf6bac4be74c8759f69125d9ae9137d382aecda2

Download Submit
C:\Windows\SysWOW64\cezwvxir\ttsyjxeh.exe
Filesize
14.8MB

MD5
d346cbc80c367424b291e61c2f3e40af

SHA1
75fdfc7c95a02b68f5a8e08211bbadc1c0597be4

SHA256
894d42021c3372c994e6f8522a27b56d0d782f07df6cfd86b28cb26132505b3a

SHA512
1b9b258fb14ef642f85ecec1e116d5b938e08159535e2b6e71042f70bb9e0a901cef1faf5ceb7b89832f731ccf6bac4be74c8759f69125d9ae9137d382aecda2

Download Submit
memory/472-63-0x0000000000000000-mapping.dmp

Download
memory/1064-61-0x0000000000000000-mapping.dmp

Download
memory/1124-59-0x0000000000000000-mapping.dmp

Download
memory/1220-66-0x0000000000000000-mapping.dmp

Download
memory/1456-56-0x0000000000000000-mapping.dmp

Download
memory/1728-65-0x000000000063E000-0x000000000064F000-memory.dmp

Filesize
68KB

Download
memory/1728-69-0x0000000000400000-0x00000000004FA000-memory.dmp

Filesize
1000KB

Download
memory/1728-76-0x0000000000400000-0x00000000004FA000-memory.dmp

Filesize
1000KB

Download
memory/1728-70-0x000000000063E000-0x000000000064F000-memory.dmp

Filesize
68KB

Download
memory/1852-71-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download
memory/1852-73-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download
memory/1852-74-0x00000000000C9A6B-mapping.dmp

Download
memory/1852-80-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download
memory/1852-81-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download
memory/1984-58-0x0000000000400000-0x00000000004FA000-memory.dmp

Filesize
1000KB

Download
memory/1984-54-0x000000000066E000-0x0000000000680000-memory.dmp

Filesize
72KB

Download
memory/1984-67-0x0000000000400000-0x00000000004FA000-memory.dmp

Filesize
1000KB

Download
memory/1984-55-0x0000000076571000-0x0000000076573000-memory.dmp

Filesize
8KB

Download
memory/1984-57-0x000000000066E000-0x0000000000680000-memory.dmp

Filesize
72KB

Download
memory/2020-62-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads