tofsee | 53e637996db3df92d3ef579b52fc63f38902c2d9522295ef07bbb3594cad2593

General

Target

53e637996db3df92d3ef579b52fc63f38902c2d9522295ef07bbb3594cad2593.exe
Size

98KB
MD5

d9edc460194b4e171f4d802203dba4d4
SHA1

6ff3775eae4005c8c6684f7520ccccf747985836
SHA256

53e637996db3df92d3ef579b52fc63f38902c2d9522295ef07bbb3594cad2593
SHA512

f6d648c86d4ecfb9c18b8fee28706b3ca01f74bb623c35ae295b7196b7eba3d2db896960dacfb6b6e4626f8198480b429e71a2d05e4ca7ba0bce7bcd4b8d57dd

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\vkxwdfms = "0"	svchost.exe

Creates new service(s) 1 TTPs
persistence

New Service
T1050
Executes dropped EXE 1 IoCs

Processes:

dfaricjc.exe

pid process

1572 dfaricjc.exe
Modifies Windows Firewall 1 TTPs 1 IoCs
evasion

Modify Existing Service
T1031

Processes:

netsh.exe

pid process

340 netsh.exe

pid	process
1572	dfaricjc.exe

pid	process
340	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\vkxwdfms\ImagePath = "C:\\Windows\\SysWOW64\\vkxwdfms\\dfaricjc.exe"	svchost.exe

Deletes itself 1 IoCs

Processes:

svchost.exe

pid process

1868 svchost.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

dfaricjc.exe

description pid process target process

PID 1572 set thread context of 1868 1572 dfaricjc.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

1744 sc.exe
880 sc.exe
1164 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
1868	svchost.exe

description	pid	process	target process
PID 1572 set thread context of 1868	1572	dfaricjc.exe	svchost.exe

pid	process
1744	sc.exe
880	sc.exe
1164	sc.exe

Suspicious use of WriteProcessMemory 30 IoCs

Processes:

53e637996db3df92d3ef579b52fc63f38902c2d9522295ef07bbb3594cad2593.exedfaricjc.exe

description	pid	process	target process
PID 1984 wrote to memory of 1748	1984	53e637996db3df92d3ef579b52fc63f38902c2d9522295ef07bbb3594cad2593.exe	cmd.exe
PID 1984 wrote to memory of 1748	1984	53e637996db3df92d3ef579b52fc63f38902c2d9522295ef07bbb3594cad2593.exe	cmd.exe
PID 1984 wrote to memory of 1748	1984	53e637996db3df92d3ef579b52fc63f38902c2d9522295ef07bbb3594cad2593.exe	cmd.exe
PID 1984 wrote to memory of 1748	1984	53e637996db3df92d3ef579b52fc63f38902c2d9522295ef07bbb3594cad2593.exe	cmd.exe
PID 1984 wrote to memory of 1464	1984	53e637996db3df92d3ef579b52fc63f38902c2d9522295ef07bbb3594cad2593.exe	cmd.exe
PID 1984 wrote to memory of 1464	1984	53e637996db3df92d3ef579b52fc63f38902c2d9522295ef07bbb3594cad2593.exe	cmd.exe
PID 1984 wrote to memory of 1464	1984	53e637996db3df92d3ef579b52fc63f38902c2d9522295ef07bbb3594cad2593.exe	cmd.exe
PID 1984 wrote to memory of 1464	1984	53e637996db3df92d3ef579b52fc63f38902c2d9522295ef07bbb3594cad2593.exe	cmd.exe
PID 1984 wrote to memory of 1744	1984	53e637996db3df92d3ef579b52fc63f38902c2d9522295ef07bbb3594cad2593.exe	sc.exe
PID 1984 wrote to memory of 1744	1984	53e637996db3df92d3ef579b52fc63f38902c2d9522295ef07bbb3594cad2593.exe	sc.exe
PID 1984 wrote to memory of 1744	1984	53e637996db3df92d3ef579b52fc63f38902c2d9522295ef07bbb3594cad2593.exe	sc.exe
PID 1984 wrote to memory of 1744	1984	53e637996db3df92d3ef579b52fc63f38902c2d9522295ef07bbb3594cad2593.exe	sc.exe
PID 1984 wrote to memory of 880	1984	53e637996db3df92d3ef579b52fc63f38902c2d9522295ef07bbb3594cad2593.exe	sc.exe
PID 1984 wrote to memory of 880	1984	53e637996db3df92d3ef579b52fc63f38902c2d9522295ef07bbb3594cad2593.exe	sc.exe
PID 1984 wrote to memory of 880	1984	53e637996db3df92d3ef579b52fc63f38902c2d9522295ef07bbb3594cad2593.exe	sc.exe
PID 1984 wrote to memory of 880	1984	53e637996db3df92d3ef579b52fc63f38902c2d9522295ef07bbb3594cad2593.exe	sc.exe
PID 1984 wrote to memory of 1164	1984	53e637996db3df92d3ef579b52fc63f38902c2d9522295ef07bbb3594cad2593.exe	sc.exe
PID 1984 wrote to memory of 1164	1984	53e637996db3df92d3ef579b52fc63f38902c2d9522295ef07bbb3594cad2593.exe	sc.exe
PID 1984 wrote to memory of 1164	1984	53e637996db3df92d3ef579b52fc63f38902c2d9522295ef07bbb3594cad2593.exe	sc.exe
PID 1984 wrote to memory of 1164	1984	53e637996db3df92d3ef579b52fc63f38902c2d9522295ef07bbb3594cad2593.exe	sc.exe
PID 1984 wrote to memory of 340	1984	53e637996db3df92d3ef579b52fc63f38902c2d9522295ef07bbb3594cad2593.exe	netsh.exe
PID 1984 wrote to memory of 340	1984	53e637996db3df92d3ef579b52fc63f38902c2d9522295ef07bbb3594cad2593.exe	netsh.exe
PID 1984 wrote to memory of 340	1984	53e637996db3df92d3ef579b52fc63f38902c2d9522295ef07bbb3594cad2593.exe	netsh.exe
PID 1984 wrote to memory of 340	1984	53e637996db3df92d3ef579b52fc63f38902c2d9522295ef07bbb3594cad2593.exe	netsh.exe
PID 1572 wrote to memory of 1868	1572	dfaricjc.exe	svchost.exe
PID 1572 wrote to memory of 1868	1572	dfaricjc.exe	svchost.exe
PID 1572 wrote to memory of 1868	1572	dfaricjc.exe	svchost.exe
PID 1572 wrote to memory of 1868	1572	dfaricjc.exe	svchost.exe
PID 1572 wrote to memory of 1868	1572	dfaricjc.exe	svchost.exe
PID 1572 wrote to memory of 1868	1572	dfaricjc.exe	svchost.exe

C:\Users\Admin\AppData\Local\Temp\53e637996db3df92d3ef579b52fc63f38902c2d9522295ef07bbb3594cad2593.exe
"C:\Users\Admin\AppData\Local\Temp\53e637996db3df92d3ef579b52fc63f38902c2d9522295ef07bbb3594cad2593.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:1984

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\vkxwdfms\
2⤵
PID:1748

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\dfaricjc.exe" C:\Windows\SysWOW64\vkxwdfms\
2⤵
PID:1464

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create vkxwdfms binPath= "C:\Windows\SysWOW64\vkxwdfms\dfaricjc.exe /d\"C:\Users\Admin\AppData\Local\Temp\53e637996db3df92d3ef579b52fc63f38902c2d9522295ef07bbb3594cad2593.exe\"" type= own start= auto DisplayName= "wifi support"
2⤵
- Launches sc.exe
PID:1744

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description vkxwdfms "wifi internet conection"
2⤵
- Launches sc.exe
PID:880

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start vkxwdfms
2⤵
- Launches sc.exe
PID:1164

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:340

C:\Windows\SysWOW64\vkxwdfms\dfaricjc.exe
C:\Windows\SysWOW64\vkxwdfms\dfaricjc.exe /d"C:\Users\Admin\AppData\Local\Temp\53e637996db3df92d3ef579b52fc63f38902c2d9522295ef07bbb3594cad2593.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1572

C:\Windows\SysWOW64\svchost.exe
svchost.exe
2⤵
- Windows security bypass
- Sets service image path in registry
- Deletes itself
PID:1868

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\dfaricjc.exe
Filesize
14.3MB

MD5
6d3f0ac5095411d37d9bed526c6d749e

SHA1
e6d26c3eb92fa684581a190fe7f69a9391067c62

SHA256
27b80aa45bcb7b0348dd3e62c7eb09995e0def1cb116be28c4b570386902923a

SHA512
ef1b9addcc4221147144ea58f14b7ac1e5b812360864780dc265164af0472f5987d66c7cf2bb858acf0939e057b20fb7b7dc9e42f23ea85789eaced81bdc63c2

Download Submit
C:\Windows\SysWOW64\vkxwdfms\dfaricjc.exe
Filesize
14.3MB

MD5
6d3f0ac5095411d37d9bed526c6d749e

SHA1
e6d26c3eb92fa684581a190fe7f69a9391067c62

SHA256
27b80aa45bcb7b0348dd3e62c7eb09995e0def1cb116be28c4b570386902923a

SHA512
ef1b9addcc4221147144ea58f14b7ac1e5b812360864780dc265164af0472f5987d66c7cf2bb858acf0939e057b20fb7b7dc9e42f23ea85789eaced81bdc63c2

Download Submit
memory/340-62-0x0000000000000000-mapping.dmp

Download
memory/880-60-0x0000000000000000-mapping.dmp

Download
memory/1164-61-0x0000000000000000-mapping.dmp

Download
memory/1464-57-0x0000000000000000-mapping.dmp

Download
memory/1572-64-0x0000000000400000-0x000000000041C000-memory.dmp

Filesize
112KB

Download
memory/1744-59-0x0000000000000000-mapping.dmp

Download
memory/1748-56-0x0000000000000000-mapping.dmp

Download
memory/1868-66-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/1868-68-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/1868-69-0x0000000000089A6B-mapping.dmp

Download
memory/1868-74-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/1868-75-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/1984-54-0x0000000000400000-0x000000000041C000-memory.dmp

Filesize
112KB

Download
memory/1984-55-0x0000000075441000-0x0000000075443000-memory.dmp

Filesize
8KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads