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
Creates new service(s) 1 TTPs
persistence

New Service
T1050
Executes dropped EXE 1 IoCs

Processes:

dpqkfbcz.exe

pid process

4824 dpqkfbcz.exe
Modifies Windows Firewall 1 TTPs 1 IoCs
evasion

Modify Existing Service
T1031

Processes:

netsh.exe

pid process

1340 netsh.exe

pid	process
4824	dpqkfbcz.exe

pid	process
1340	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\chzsescb\ImagePath = "C:\\Windows\\SysWOW64\\chzsescb\\dpqkfbcz.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:

39e2b92059aea92f0cef66384347db789668df9ba87067a21060b6fdf7da7bc9.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1809750270-3141839489-3074374771-1000\Control Panel\International\Geo\Nation	39e2b92059aea92f0cef66384347db789668df9ba87067a21060b6fdf7da7bc9.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

dpqkfbcz.exe

description pid process target process

PID 4824 set thread context of 2260 4824 dpqkfbcz.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

5108 sc.exe
1688 sc.exe
2160 sc.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

description	pid	process	target process
PID 4824 set thread context of 2260	4824	dpqkfbcz.exe	svchost.exe

pid	process
5108	sc.exe
1688	sc.exe
2160	sc.exe

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

39e2b92059aea92f0cef66384347db789668df9ba87067a21060b6fdf7da7bc9.exedpqkfbcz.exe

description	pid	process	target process
PID 4756 wrote to memory of 4696	4756	39e2b92059aea92f0cef66384347db789668df9ba87067a21060b6fdf7da7bc9.exe	cmd.exe
PID 4756 wrote to memory of 4696	4756	39e2b92059aea92f0cef66384347db789668df9ba87067a21060b6fdf7da7bc9.exe	cmd.exe
PID 4756 wrote to memory of 4696	4756	39e2b92059aea92f0cef66384347db789668df9ba87067a21060b6fdf7da7bc9.exe	cmd.exe
PID 4756 wrote to memory of 4700	4756	39e2b92059aea92f0cef66384347db789668df9ba87067a21060b6fdf7da7bc9.exe	cmd.exe
PID 4756 wrote to memory of 4700	4756	39e2b92059aea92f0cef66384347db789668df9ba87067a21060b6fdf7da7bc9.exe	cmd.exe
PID 4756 wrote to memory of 4700	4756	39e2b92059aea92f0cef66384347db789668df9ba87067a21060b6fdf7da7bc9.exe	cmd.exe
PID 4756 wrote to memory of 1688	4756	39e2b92059aea92f0cef66384347db789668df9ba87067a21060b6fdf7da7bc9.exe	sc.exe
PID 4756 wrote to memory of 1688	4756	39e2b92059aea92f0cef66384347db789668df9ba87067a21060b6fdf7da7bc9.exe	sc.exe
PID 4756 wrote to memory of 1688	4756	39e2b92059aea92f0cef66384347db789668df9ba87067a21060b6fdf7da7bc9.exe	sc.exe
PID 4756 wrote to memory of 2160	4756	39e2b92059aea92f0cef66384347db789668df9ba87067a21060b6fdf7da7bc9.exe	sc.exe
PID 4756 wrote to memory of 2160	4756	39e2b92059aea92f0cef66384347db789668df9ba87067a21060b6fdf7da7bc9.exe	sc.exe
PID 4756 wrote to memory of 2160	4756	39e2b92059aea92f0cef66384347db789668df9ba87067a21060b6fdf7da7bc9.exe	sc.exe
PID 4756 wrote to memory of 5108	4756	39e2b92059aea92f0cef66384347db789668df9ba87067a21060b6fdf7da7bc9.exe	sc.exe
PID 4756 wrote to memory of 5108	4756	39e2b92059aea92f0cef66384347db789668df9ba87067a21060b6fdf7da7bc9.exe	sc.exe
PID 4756 wrote to memory of 5108	4756	39e2b92059aea92f0cef66384347db789668df9ba87067a21060b6fdf7da7bc9.exe	sc.exe
PID 4756 wrote to memory of 1340	4756	39e2b92059aea92f0cef66384347db789668df9ba87067a21060b6fdf7da7bc9.exe	netsh.exe
PID 4756 wrote to memory of 1340	4756	39e2b92059aea92f0cef66384347db789668df9ba87067a21060b6fdf7da7bc9.exe	netsh.exe
PID 4756 wrote to memory of 1340	4756	39e2b92059aea92f0cef66384347db789668df9ba87067a21060b6fdf7da7bc9.exe	netsh.exe
PID 4824 wrote to memory of 2260	4824	dpqkfbcz.exe	svchost.exe
PID 4824 wrote to memory of 2260	4824	dpqkfbcz.exe	svchost.exe
PID 4824 wrote to memory of 2260	4824	dpqkfbcz.exe	svchost.exe
PID 4824 wrote to memory of 2260	4824	dpqkfbcz.exe	svchost.exe
PID 4824 wrote to memory of 2260	4824	dpqkfbcz.exe	svchost.exe

C:\Users\Admin\AppData\Local\Temp\39e2b92059aea92f0cef66384347db789668df9ba87067a21060b6fdf7da7bc9.exe
"C:\Users\Admin\AppData\Local\Temp\39e2b92059aea92f0cef66384347db789668df9ba87067a21060b6fdf7da7bc9.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4756

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\chzsescb\
2⤵
PID:4696

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\dpqkfbcz.exe" C:\Windows\SysWOW64\chzsescb\
2⤵
PID:4700

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create chzsescb binPath= "C:\Windows\SysWOW64\chzsescb\dpqkfbcz.exe /d\"C:\Users\Admin\AppData\Local\Temp\39e2b92059aea92f0cef66384347db789668df9ba87067a21060b6fdf7da7bc9.exe\"" type= own start= auto DisplayName= "wifi support"
2⤵
- Launches sc.exe
PID:1688

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description chzsescb "wifi internet conection"
2⤵
- Launches sc.exe
PID:2160

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start chzsescb
2⤵
- Launches sc.exe
PID:5108

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:1340

C:\Windows\SysWOW64\chzsescb\dpqkfbcz.exe
C:\Windows\SysWOW64\chzsescb\dpqkfbcz.exe /d"C:\Users\Admin\AppData\Local\Temp\39e2b92059aea92f0cef66384347db789668df9ba87067a21060b6fdf7da7bc9.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4824

C:\Windows\SysWOW64\svchost.exe
svchost.exe
2⤵
- Sets service image path in registry
PID:2260

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

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\dpqkfbcz.exe
Filesize
11.2MB

MD5
7d76a3b75d8a03c2ccf4f71372090397

SHA1
d035a238b3b72b66e518ff64f0b82e5a34975f9c

SHA256
dc3a52c38c6da2022021d001352377c4cefc57f2cda0cbd51bd59fdacd5da7e6

SHA512
d8dd67095c0de101c191e104caab0f935c7b0f29a37f10c269226ff01fffb94e585bc736882ac6d7b0e77544136ebd93d2c2743501e8da6c7092265d7706439c

Download Submit
C:\Windows\SysWOW64\chzsescb\dpqkfbcz.exe
Filesize
11.2MB

MD5
7d76a3b75d8a03c2ccf4f71372090397

SHA1
d035a238b3b72b66e518ff64f0b82e5a34975f9c

SHA256
dc3a52c38c6da2022021d001352377c4cefc57f2cda0cbd51bd59fdacd5da7e6

SHA512
d8dd67095c0de101c191e104caab0f935c7b0f29a37f10c269226ff01fffb94e585bc736882ac6d7b0e77544136ebd93d2c2743501e8da6c7092265d7706439c

Download Submit
memory/1340-139-0x0000000000000000-mapping.dmp

Download
memory/1688-136-0x0000000000000000-mapping.dmp

Download
memory/2160-137-0x0000000000000000-mapping.dmp

Download
memory/2260-145-0x0000000000FE0000-0x0000000000FF5000-memory.dmp

Filesize
84KB

Download
memory/2260-151-0x0000000000FE0000-0x0000000000FF5000-memory.dmp

Filesize
84KB

Download
memory/2260-150-0x0000000000FE0000-0x0000000000FF5000-memory.dmp

Filesize
84KB

Download
memory/2260-144-0x0000000000000000-mapping.dmp

Download
memory/4696-132-0x0000000000000000-mapping.dmp

Download
memory/4700-134-0x0000000000000000-mapping.dmp

Download
memory/4756-131-0x0000000000588000-0x0000000000599000-memory.dmp

Filesize
68KB

Download
memory/4756-141-0x0000000000400000-0x00000000004FA000-memory.dmp

Filesize
1000KB

Download
memory/4756-140-0x0000000000588000-0x0000000000599000-memory.dmp

Filesize
68KB

Download
memory/4756-130-0x0000000000588000-0x0000000000599000-memory.dmp

Filesize
68KB

Download
memory/4756-133-0x0000000000400000-0x00000000004FA000-memory.dmp

Filesize
1000KB

Download
memory/4824-143-0x00000000008A4000-0x00000000008B5000-memory.dmp

Filesize
68KB

Download
memory/4824-148-0x00000000008A4000-0x00000000008B5000-memory.dmp

Filesize
68KB

Download
memory/4824-149-0x0000000000400000-0x00000000004FA000-memory.dmp

Filesize
1000KB

Download
memory/5108-138-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads