tofsee | 5b3ed204bf794afc4d32c750e74a219c4730b2a96ded36c6ea2753581158ab11

General

Target

5b3ed204bf794afc4d32c750e74a219c4730b2a96ded36c6ea2753581158ab11.exe
Size

138KB
MD5

9e23db864b9cc771a31f1ee21d7d418c
SHA1

8f510bac94a035d004d2f995e5ec7d11e48a057c
SHA256

5b3ed204bf794afc4d32c750e74a219c4730b2a96ded36c6ea2753581158ab11
SHA512

d0efd4f3089ad8fcbbe782f49753edf4fee3884ebc82a86c172a5615e0758bdeb030c25468e7b46da1b6668daa7a9f6ee24a8e08a08b29c87edaba0cd7fa7c2d

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:

wzjpwhaq.exe

pid process

1628 wzjpwhaq.exe
Modifies Windows Firewall 1 TTPs 1 IoCs
evasion

Modify Existing Service
T1031

Processes:

netsh.exe

pid process

1804 netsh.exe

pid	process
1628	wzjpwhaq.exe

pid	process
1804	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\ubxkzrcn\ImagePath = "C:\\Windows\\SysWOW64\\ubxkzrcn\\wzjpwhaq.exe"	svchost.exe

Deletes itself 1 IoCs

Processes:

svchost.exe

pid process

1116 svchost.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

wzjpwhaq.exe

description pid process target process

PID 1628 set thread context of 1116 1628 wzjpwhaq.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

760 sc.exe
1364 sc.exe
1820 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
1116	svchost.exe

description	pid	process	target process
PID 1628 set thread context of 1116	1628	wzjpwhaq.exe	svchost.exe

pid	process
760	sc.exe
1364	sc.exe
1820	sc.exe

Suspicious use of WriteProcessMemory 30 IoCs

Processes:

5b3ed204bf794afc4d32c750e74a219c4730b2a96ded36c6ea2753581158ab11.exewzjpwhaq.exe

description	pid	process	target process
PID 1152 wrote to memory of 988	1152	5b3ed204bf794afc4d32c750e74a219c4730b2a96ded36c6ea2753581158ab11.exe	cmd.exe
PID 1152 wrote to memory of 988	1152	5b3ed204bf794afc4d32c750e74a219c4730b2a96ded36c6ea2753581158ab11.exe	cmd.exe
PID 1152 wrote to memory of 988	1152	5b3ed204bf794afc4d32c750e74a219c4730b2a96ded36c6ea2753581158ab11.exe	cmd.exe
PID 1152 wrote to memory of 988	1152	5b3ed204bf794afc4d32c750e74a219c4730b2a96ded36c6ea2753581158ab11.exe	cmd.exe
PID 1152 wrote to memory of 1728	1152	5b3ed204bf794afc4d32c750e74a219c4730b2a96ded36c6ea2753581158ab11.exe	cmd.exe
PID 1152 wrote to memory of 1728	1152	5b3ed204bf794afc4d32c750e74a219c4730b2a96ded36c6ea2753581158ab11.exe	cmd.exe
PID 1152 wrote to memory of 1728	1152	5b3ed204bf794afc4d32c750e74a219c4730b2a96ded36c6ea2753581158ab11.exe	cmd.exe
PID 1152 wrote to memory of 1728	1152	5b3ed204bf794afc4d32c750e74a219c4730b2a96ded36c6ea2753581158ab11.exe	cmd.exe
PID 1152 wrote to memory of 760	1152	5b3ed204bf794afc4d32c750e74a219c4730b2a96ded36c6ea2753581158ab11.exe	sc.exe
PID 1152 wrote to memory of 760	1152	5b3ed204bf794afc4d32c750e74a219c4730b2a96ded36c6ea2753581158ab11.exe	sc.exe
PID 1152 wrote to memory of 760	1152	5b3ed204bf794afc4d32c750e74a219c4730b2a96ded36c6ea2753581158ab11.exe	sc.exe
PID 1152 wrote to memory of 760	1152	5b3ed204bf794afc4d32c750e74a219c4730b2a96ded36c6ea2753581158ab11.exe	sc.exe
PID 1152 wrote to memory of 1364	1152	5b3ed204bf794afc4d32c750e74a219c4730b2a96ded36c6ea2753581158ab11.exe	sc.exe
PID 1152 wrote to memory of 1364	1152	5b3ed204bf794afc4d32c750e74a219c4730b2a96ded36c6ea2753581158ab11.exe	sc.exe
PID 1152 wrote to memory of 1364	1152	5b3ed204bf794afc4d32c750e74a219c4730b2a96ded36c6ea2753581158ab11.exe	sc.exe
PID 1152 wrote to memory of 1364	1152	5b3ed204bf794afc4d32c750e74a219c4730b2a96ded36c6ea2753581158ab11.exe	sc.exe
PID 1152 wrote to memory of 1820	1152	5b3ed204bf794afc4d32c750e74a219c4730b2a96ded36c6ea2753581158ab11.exe	sc.exe
PID 1152 wrote to memory of 1820	1152	5b3ed204bf794afc4d32c750e74a219c4730b2a96ded36c6ea2753581158ab11.exe	sc.exe
PID 1152 wrote to memory of 1820	1152	5b3ed204bf794afc4d32c750e74a219c4730b2a96ded36c6ea2753581158ab11.exe	sc.exe
PID 1152 wrote to memory of 1820	1152	5b3ed204bf794afc4d32c750e74a219c4730b2a96ded36c6ea2753581158ab11.exe	sc.exe
PID 1152 wrote to memory of 1804	1152	5b3ed204bf794afc4d32c750e74a219c4730b2a96ded36c6ea2753581158ab11.exe	netsh.exe
PID 1152 wrote to memory of 1804	1152	5b3ed204bf794afc4d32c750e74a219c4730b2a96ded36c6ea2753581158ab11.exe	netsh.exe
PID 1152 wrote to memory of 1804	1152	5b3ed204bf794afc4d32c750e74a219c4730b2a96ded36c6ea2753581158ab11.exe	netsh.exe
PID 1152 wrote to memory of 1804	1152	5b3ed204bf794afc4d32c750e74a219c4730b2a96ded36c6ea2753581158ab11.exe	netsh.exe
PID 1628 wrote to memory of 1116	1628	wzjpwhaq.exe	svchost.exe
PID 1628 wrote to memory of 1116	1628	wzjpwhaq.exe	svchost.exe
PID 1628 wrote to memory of 1116	1628	wzjpwhaq.exe	svchost.exe
PID 1628 wrote to memory of 1116	1628	wzjpwhaq.exe	svchost.exe
PID 1628 wrote to memory of 1116	1628	wzjpwhaq.exe	svchost.exe
PID 1628 wrote to memory of 1116	1628	wzjpwhaq.exe	svchost.exe

C:\Users\Admin\AppData\Local\Temp\5b3ed204bf794afc4d32c750e74a219c4730b2a96ded36c6ea2753581158ab11.exe
"C:\Users\Admin\AppData\Local\Temp\5b3ed204bf794afc4d32c750e74a219c4730b2a96ded36c6ea2753581158ab11.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:1152

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\ubxkzrcn\
2⤵
PID:988

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\wzjpwhaq.exe" C:\Windows\SysWOW64\ubxkzrcn\
2⤵
PID:1728

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create ubxkzrcn binPath= "C:\Windows\SysWOW64\ubxkzrcn\wzjpwhaq.exe /d\"C:\Users\Admin\AppData\Local\Temp\5b3ed204bf794afc4d32c750e74a219c4730b2a96ded36c6ea2753581158ab11.exe\"" type= own start= auto DisplayName= "wifi support"
2⤵
- Launches sc.exe
PID:760

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description ubxkzrcn "wifi internet conection"
2⤵
- Launches sc.exe
PID:1364

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start ubxkzrcn
2⤵
- Launches sc.exe
PID:1820

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:1804

C:\Windows\SysWOW64\ubxkzrcn\wzjpwhaq.exe
C:\Windows\SysWOW64\ubxkzrcn\wzjpwhaq.exe /d"C:\Users\Admin\AppData\Local\Temp\5b3ed204bf794afc4d32c750e74a219c4730b2a96ded36c6ea2753581158ab11.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1628

C:\Windows\SysWOW64\svchost.exe
svchost.exe
2⤵
- Sets service image path in registry
- Deletes itself
PID:1116

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

System Information Discovery

1

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\wzjpwhaq.exe
Filesize
12.9MB

MD5
d093eabb255fbd2305157cabb5952504

SHA1
431f8d0f02001655374e583f6e9b7fd5f472efbd

SHA256
8e01a113a72e6f7ddf92381d1bb2d5dfcaba86f0e4552b147dbd3aa90446fa92

SHA512
301d910318c123fadf7f611c4035abff6c24e8dc1b7ca8a8e0ebd6a92893635d4313b663db9ddc7c7fa0f2e00be0ef42ab7ae64dc9179cba4cd65a189fc8f3e7

Download Submit
C:\Windows\SysWOW64\ubxkzrcn\wzjpwhaq.exe
Filesize
12.9MB

MD5
d093eabb255fbd2305157cabb5952504

SHA1
431f8d0f02001655374e583f6e9b7fd5f472efbd

SHA256
8e01a113a72e6f7ddf92381d1bb2d5dfcaba86f0e4552b147dbd3aa90446fa92

SHA512
301d910318c123fadf7f611c4035abff6c24e8dc1b7ca8a8e0ebd6a92893635d4313b663db9ddc7c7fa0f2e00be0ef42ab7ae64dc9179cba4cd65a189fc8f3e7

Download Submit
memory/760-59-0x0000000000000000-mapping.dmp

Download
memory/988-56-0x0000000000000000-mapping.dmp

Download
memory/1116-67-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/1116-74-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/1116-70-0x0000000000089A6B-mapping.dmp

Download
memory/1116-69-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/1152-55-0x0000000075D51000-0x0000000075D53000-memory.dmp

Filesize
8KB

Download
memory/1152-54-0x0000000000400000-0x0000000000425000-memory.dmp

Filesize
148KB

Download
memory/1364-60-0x0000000000000000-mapping.dmp

Download
memory/1628-65-0x0000000000400000-0x0000000000425000-memory.dmp

Filesize
148KB

Download
memory/1728-57-0x0000000000000000-mapping.dmp

Download
memory/1804-62-0x0000000000000000-mapping.dmp

Download
memory/1820-61-0x0000000000000000-mapping.dmp

Download

Analysis

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