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
Creates new service(s) 1 TTPs
persistence

New Service
T1050
Executes dropped EXE 1 IoCs

Processes:

srdzeoyl.exe

pid process

1360 srdzeoyl.exe
Modifies Windows Firewall 1 TTPs 1 IoCs
evasion

Modify Existing Service
T1031

Processes:

netsh.exe

pid process

3160 netsh.exe

pid	process
1360	srdzeoyl.exe

pid	process
3160	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\dponxwet\ImagePath = "C:\\Windows\\SysWOW64\\dponxwet\\srdzeoyl.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:

53e637996db3df92d3ef579b52fc63f38902c2d9522295ef07bbb3594cad2593.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2372564722-193526734-2636556182-1000\Control Panel\International\Geo\Nation	53e637996db3df92d3ef579b52fc63f38902c2d9522295ef07bbb3594cad2593.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

srdzeoyl.exe

description pid process target process

PID 1360 set thread context of 2244 1360 srdzeoyl.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

2960 sc.exe
4808 sc.exe
4980 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 1360 set thread context of 2244	1360	srdzeoyl.exe	svchost.exe

pid	process
2960	sc.exe
4808	sc.exe
4980	sc.exe

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

53e637996db3df92d3ef579b52fc63f38902c2d9522295ef07bbb3594cad2593.exesrdzeoyl.exe

description	pid	process	target process
PID 4512 wrote to memory of 4188	4512	53e637996db3df92d3ef579b52fc63f38902c2d9522295ef07bbb3594cad2593.exe	cmd.exe
PID 4512 wrote to memory of 4188	4512	53e637996db3df92d3ef579b52fc63f38902c2d9522295ef07bbb3594cad2593.exe	cmd.exe
PID 4512 wrote to memory of 4188	4512	53e637996db3df92d3ef579b52fc63f38902c2d9522295ef07bbb3594cad2593.exe	cmd.exe
PID 4512 wrote to memory of 1916	4512	53e637996db3df92d3ef579b52fc63f38902c2d9522295ef07bbb3594cad2593.exe	cmd.exe
PID 4512 wrote to memory of 1916	4512	53e637996db3df92d3ef579b52fc63f38902c2d9522295ef07bbb3594cad2593.exe	cmd.exe
PID 4512 wrote to memory of 1916	4512	53e637996db3df92d3ef579b52fc63f38902c2d9522295ef07bbb3594cad2593.exe	cmd.exe
PID 4512 wrote to memory of 4808	4512	53e637996db3df92d3ef579b52fc63f38902c2d9522295ef07bbb3594cad2593.exe	sc.exe
PID 4512 wrote to memory of 4808	4512	53e637996db3df92d3ef579b52fc63f38902c2d9522295ef07bbb3594cad2593.exe	sc.exe
PID 4512 wrote to memory of 4808	4512	53e637996db3df92d3ef579b52fc63f38902c2d9522295ef07bbb3594cad2593.exe	sc.exe
PID 4512 wrote to memory of 4980	4512	53e637996db3df92d3ef579b52fc63f38902c2d9522295ef07bbb3594cad2593.exe	sc.exe
PID 4512 wrote to memory of 4980	4512	53e637996db3df92d3ef579b52fc63f38902c2d9522295ef07bbb3594cad2593.exe	sc.exe
PID 4512 wrote to memory of 4980	4512	53e637996db3df92d3ef579b52fc63f38902c2d9522295ef07bbb3594cad2593.exe	sc.exe
PID 4512 wrote to memory of 2960	4512	53e637996db3df92d3ef579b52fc63f38902c2d9522295ef07bbb3594cad2593.exe	sc.exe
PID 4512 wrote to memory of 2960	4512	53e637996db3df92d3ef579b52fc63f38902c2d9522295ef07bbb3594cad2593.exe	sc.exe
PID 4512 wrote to memory of 2960	4512	53e637996db3df92d3ef579b52fc63f38902c2d9522295ef07bbb3594cad2593.exe	sc.exe
PID 1360 wrote to memory of 2244	1360	srdzeoyl.exe	svchost.exe
PID 1360 wrote to memory of 2244	1360	srdzeoyl.exe	svchost.exe
PID 1360 wrote to memory of 2244	1360	srdzeoyl.exe	svchost.exe
PID 1360 wrote to memory of 2244	1360	srdzeoyl.exe	svchost.exe
PID 1360 wrote to memory of 2244	1360	srdzeoyl.exe	svchost.exe
PID 4512 wrote to memory of 3160	4512	53e637996db3df92d3ef579b52fc63f38902c2d9522295ef07bbb3594cad2593.exe	netsh.exe
PID 4512 wrote to memory of 3160	4512	53e637996db3df92d3ef579b52fc63f38902c2d9522295ef07bbb3594cad2593.exe	netsh.exe
PID 4512 wrote to memory of 3160	4512	53e637996db3df92d3ef579b52fc63f38902c2d9522295ef07bbb3594cad2593.exe	netsh.exe

C:\Users\Admin\AppData\Local\Temp\53e637996db3df92d3ef579b52fc63f38902c2d9522295ef07bbb3594cad2593.exe
"C:\Users\Admin\AppData\Local\Temp\53e637996db3df92d3ef579b52fc63f38902c2d9522295ef07bbb3594cad2593.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4512

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\dponxwet\
2⤵
PID:4188

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\srdzeoyl.exe" C:\Windows\SysWOW64\dponxwet\
2⤵
PID:1916

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create dponxwet binPath= "C:\Windows\SysWOW64\dponxwet\srdzeoyl.exe /d\"C:\Users\Admin\AppData\Local\Temp\53e637996db3df92d3ef579b52fc63f38902c2d9522295ef07bbb3594cad2593.exe\"" type= own start= auto DisplayName= "wifi support"
2⤵
- Launches sc.exe
PID:4808

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description dponxwet "wifi internet conection"
2⤵
- Launches sc.exe
PID:4980

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start dponxwet
2⤵
- Launches sc.exe
PID:2960

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:3160

C:\Windows\SysWOW64\dponxwet\srdzeoyl.exe
C:\Windows\SysWOW64\dponxwet\srdzeoyl.exe /d"C:\Users\Admin\AppData\Local\Temp\53e637996db3df92d3ef579b52fc63f38902c2d9522295ef07bbb3594cad2593.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1360

C:\Windows\SysWOW64\svchost.exe
svchost.exe
2⤵
- Sets service image path in registry
PID:2244

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\srdzeoyl.exe
Filesize
10.7MB

MD5
09d93d2246652b1fd379bf42ce06b23a

SHA1
7c0a3bc040e308b46470c3f041f86402a80fb3fd

SHA256
2c184f3c4c9e69af446bb27fdcf25ad26d4e2e8aaeadf95ebdf8df85fe6b28a9

SHA512
5167fc94eb8dbd85dd5552cd04fde45dcaaee68bb162547fbf7b5d2c5633d6b3187eb9b854cc58beccf1900f75827d35f9ee917db3506cd5747915e76669a274

Download Submit
C:\Windows\SysWOW64\dponxwet\srdzeoyl.exe
Filesize
10.7MB

MD5
09d93d2246652b1fd379bf42ce06b23a

SHA1
7c0a3bc040e308b46470c3f041f86402a80fb3fd

SHA256
2c184f3c4c9e69af446bb27fdcf25ad26d4e2e8aaeadf95ebdf8df85fe6b28a9

SHA512
5167fc94eb8dbd85dd5552cd04fde45dcaaee68bb162547fbf7b5d2c5633d6b3187eb9b854cc58beccf1900f75827d35f9ee917db3506cd5747915e76669a274

Download Submit
memory/1360-138-0x0000000000400000-0x000000000041C000-memory.dmp

Filesize
112KB

Download
memory/1916-132-0x0000000000000000-mapping.dmp

Download
memory/2244-139-0x0000000000000000-mapping.dmp

Download
memory/2244-140-0x00000000001E0000-0x00000000001F5000-memory.dmp

Filesize
84KB

Download
memory/2244-143-0x00000000001E0000-0x00000000001F5000-memory.dmp

Filesize
84KB

Download
memory/2960-136-0x0000000000000000-mapping.dmp

Download
memory/3160-144-0x0000000000000000-mapping.dmp

Download
memory/4188-131-0x0000000000000000-mapping.dmp

Download
memory/4512-130-0x0000000000400000-0x000000000041C000-memory.dmp

Filesize
112KB

Download
memory/4808-134-0x0000000000000000-mapping.dmp

Download
memory/4980-135-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads