tofsee | edf98c8d92926d258cf70c2348ab4c68d31b377cd273b0686f12e3545089030b

Analysis

max time kernel
147s
max time network
149s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
16-05-2024 23:05

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General

Target

da4a56f9db3ccef32e88ad2e5c616a1a.exe
Size

99KB
MD5

da4a56f9db3ccef32e88ad2e5c616a1a
SHA1

8a6379a31a9d80614fbcb05dbbc454aec169b114
SHA256

00a857cd58005ee7f9aaa14d28852b66e833375bc18f7329f955a36d271ebdee
SHA512

2d61ebb6c2c4ef87ac9bcab3558179b58ecf2e24011841876f55765023069eb48055e5b52d007bb681658a7fcc669b24bebe31a5bf91e42366f265ae1e6bead2
SSDEEP

1536:RDCxOjokD33SiCTjvEmalf++kz2u3IT7lX6Z+Hnsi73nC:p4CdDSi+Emj+vusNsi73nC

Score

10^/10

tofsee evasion execution persistence trojan

Malware Config

Extracted

Family

tofsee

43.231.4.7

lazystax.ru

Signatures

Tofsee
Backdoor/botnet which carries out malicious activities based on commands from a C2 server.
trojan tofsee
Creates new service(s) 2 TTPs
persistence execution

Windows Service
T1543.003

Service Execution
T1569.002
Modifies Windows Firewall 2 TTPs 1 IoCs
evasion

Windows Service
T1543.003

Disable or Modify System Firewall
T1562.004

Processes:

netsh.exe

pid process

3008 netsh.exe

pid	process
3008	netsh.exe

Sets service image path in registry 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

svchost.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\eobrweuy\ImagePath = "C:\\Windows\\SysWOW64\\eobrweuy\\zpvopxnw.exe"	svchost.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

Processes:

da4a56f9db3ccef32e88ad2e5c616a1a.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3558294865-3673844354-2255444939-1000\Control Panel\International\Geo\Nation	da4a56f9db3ccef32e88ad2e5c616a1a.exe

Deletes itself 1 IoCs

Processes:

svchost.exe

pid process

3172 svchost.exe
Executes dropped EXE 1 IoCs

Processes:

zpvopxnw.exe

pid process

2932 zpvopxnw.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

zpvopxnw.exe

description pid process target process

PID 2932 set thread context of 3172 2932 zpvopxnw.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

2236 sc.exe
2800 sc.exe
5076 sc.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
3172	svchost.exe

pid	process
2932	zpvopxnw.exe

description	pid	process	target process
PID 2932 set thread context of 3172	2932	zpvopxnw.exe	svchost.exe

pid	process
2236	sc.exe
2800	sc.exe
5076	sc.exe

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

da4a56f9db3ccef32e88ad2e5c616a1a.exezpvopxnw.exe

description	pid	process	target process
PID 4484 wrote to memory of 224	4484	da4a56f9db3ccef32e88ad2e5c616a1a.exe	cmd.exe
PID 4484 wrote to memory of 224	4484	da4a56f9db3ccef32e88ad2e5c616a1a.exe	cmd.exe
PID 4484 wrote to memory of 224	4484	da4a56f9db3ccef32e88ad2e5c616a1a.exe	cmd.exe
PID 4484 wrote to memory of 4320	4484	da4a56f9db3ccef32e88ad2e5c616a1a.exe	cmd.exe
PID 4484 wrote to memory of 4320	4484	da4a56f9db3ccef32e88ad2e5c616a1a.exe	cmd.exe
PID 4484 wrote to memory of 4320	4484	da4a56f9db3ccef32e88ad2e5c616a1a.exe	cmd.exe
PID 4484 wrote to memory of 2236	4484	da4a56f9db3ccef32e88ad2e5c616a1a.exe	sc.exe
PID 4484 wrote to memory of 2236	4484	da4a56f9db3ccef32e88ad2e5c616a1a.exe	sc.exe
PID 4484 wrote to memory of 2236	4484	da4a56f9db3ccef32e88ad2e5c616a1a.exe	sc.exe
PID 4484 wrote to memory of 2800	4484	da4a56f9db3ccef32e88ad2e5c616a1a.exe	sc.exe
PID 4484 wrote to memory of 2800	4484	da4a56f9db3ccef32e88ad2e5c616a1a.exe	sc.exe
PID 4484 wrote to memory of 2800	4484	da4a56f9db3ccef32e88ad2e5c616a1a.exe	sc.exe
PID 4484 wrote to memory of 5076	4484	da4a56f9db3ccef32e88ad2e5c616a1a.exe	sc.exe
PID 4484 wrote to memory of 5076	4484	da4a56f9db3ccef32e88ad2e5c616a1a.exe	sc.exe
PID 4484 wrote to memory of 5076	4484	da4a56f9db3ccef32e88ad2e5c616a1a.exe	sc.exe
PID 2932 wrote to memory of 3172	2932	zpvopxnw.exe	svchost.exe
PID 2932 wrote to memory of 3172	2932	zpvopxnw.exe	svchost.exe
PID 2932 wrote to memory of 3172	2932	zpvopxnw.exe	svchost.exe
PID 2932 wrote to memory of 3172	2932	zpvopxnw.exe	svchost.exe
PID 2932 wrote to memory of 3172	2932	zpvopxnw.exe	svchost.exe
PID 4484 wrote to memory of 3008	4484	da4a56f9db3ccef32e88ad2e5c616a1a.exe	netsh.exe
PID 4484 wrote to memory of 3008	4484	da4a56f9db3ccef32e88ad2e5c616a1a.exe	netsh.exe
PID 4484 wrote to memory of 3008	4484	da4a56f9db3ccef32e88ad2e5c616a1a.exe	netsh.exe

C:\Users\Admin\AppData\Local\Temp\da4a56f9db3ccef32e88ad2e5c616a1a.exe
"C:\Users\Admin\AppData\Local\Temp\da4a56f9db3ccef32e88ad2e5c616a1a.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4484

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\eobrweuy\
2⤵
PID:224

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\zpvopxnw.exe" C:\Windows\SysWOW64\eobrweuy\
2⤵
PID:4320

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create eobrweuy binPath= "C:\Windows\SysWOW64\eobrweuy\zpvopxnw.exe /d\"C:\Users\Admin\AppData\Local\Temp\da4a56f9db3ccef32e88ad2e5c616a1a.exe\"" type= own start= auto DisplayName= "wifi support"
2⤵
- Launches sc.exe
PID:2236

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description eobrweuy "wifi internet conection"
2⤵
- Launches sc.exe
PID:2800

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start eobrweuy
2⤵
- Launches sc.exe
PID:5076

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:3008

C:\Windows\SysWOW64\eobrweuy\zpvopxnw.exe
C:\Windows\SysWOW64\eobrweuy\zpvopxnw.exe /d"C:\Users\Admin\AppData\Local\Temp\da4a56f9db3ccef32e88ad2e5c616a1a.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2932

C:\Windows\SysWOW64\svchost.exe
svchost.exe
2⤵
- Sets service image path in registry
- Deletes itself
PID:3172

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

System Services

T1569

Service Execution

T1569.002

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Create or Modify System Process

T1543

Windows Service

T1543.003

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Create or Modify System Process

T1543

Windows Service

T1543.003

Defense Evasion

Impair Defenses

T1562

Disable or Modify System Firewall

T1562.004

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\zpvopxnw.exe
Filesize
11.7MB

MD5
032b5ed04427abe3c545c56b0f780db9

SHA1
55ab49a05d8384f65c23a4a1a2936ba0c3e3c976

SHA256
3171adefea2256bf369e21d74a0c7b4338ca39597aff8ca13400b950ac5f9760

SHA512
af48426ed36fb9d5c19c0d7b4c415ec1efb783e5b2899303691c86915fdb93db1b34287a87dfac0b749a8fcce46d0271093d12bc3f13ec205d9ce121954c10fc

Download Submit
memory/2932-6-0x0000000000400000-0x000000000041C000-memory.dmp

Filesize
112KB

Download
memory/2932-9-0x0000000000400000-0x000000000041C000-memory.dmp

Filesize
112KB

Download
memory/2932-7-0x0000000000590000-0x0000000000591000-memory.dmp

Filesize
4KB

Download
memory/3172-8-0x00000000008F0000-0x0000000000905000-memory.dmp

Filesize
84KB

Download
memory/3172-12-0x00000000008F0000-0x0000000000905000-memory.dmp

Filesize
84KB

Download
memory/3172-14-0x00000000008F0000-0x0000000000905000-memory.dmp

Filesize
84KB

Download
memory/3172-15-0x00000000008F0000-0x0000000000905000-memory.dmp

Filesize
84KB

Download
memory/3172-16-0x00000000008F0000-0x0000000000905000-memory.dmp

Filesize
84KB

Download
memory/4484-2-0x0000000000670000-0x0000000000671000-memory.dmp

Filesize
4KB

Download
memory/4484-0-0x00000000009E0000-0x00000000009E1000-memory.dmp

Filesize
4KB

Download
memory/4484-1-0x0000000000400000-0x000000000041C000-memory.dmp

Filesize
112KB

Download
memory/4484-13-0x0000000000400000-0x000000000041C000-memory.dmp

Filesize
112KB

Download