tofsee | 5bcc5563c17c7805651b50c509b6862ef554948336fbec1f99f9059a65d6b703

General

Target

5bcc5563c17c7805651b50c509b6862ef554948336fbec1f99f9059a65d6b703.exe
Size

98KB
MD5

20e50f7c063b80d6b94ec00c32b474d1
SHA1

ac92bbd2101938d52eb32b957269baa1679923ed
SHA256

5bcc5563c17c7805651b50c509b6862ef554948336fbec1f99f9059a65d6b703
SHA512

2d6aad089b0eed97a75a5134fde9ace1251da47f6796d92de1b58da6185ecd92b9043a730709e4f71ed7e6386b3b7d6a5dccfb2766996b74b4116dcf50e2b64a

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:

lcvyfsed.exe

pid process

524 lcvyfsed.exe
Modifies Windows Firewall 1 TTPs 1 IoCs
evasion

Modify Existing Service
T1031

Processes:

netsh.exe

pid process

3600 netsh.exe

pid	process
524	lcvyfsed.exe

pid	process
3600	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\sznjxuj\ImagePath = "C:\\Windows\\SysWOW64\\sznjxuj\\lcvyfsed.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:

5bcc5563c17c7805651b50c509b6862ef554948336fbec1f99f9059a65d6b703.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1101907861-274115917-2188613224-1000\Control Panel\International\Geo\Nation	5bcc5563c17c7805651b50c509b6862ef554948336fbec1f99f9059a65d6b703.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

lcvyfsed.exe

description pid process target process

PID 524 set thread context of 4888 524 lcvyfsed.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

4372 sc.exe
2036 sc.exe
4592 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 524 set thread context of 4888	524	lcvyfsed.exe	svchost.exe

pid	process
4372	sc.exe
2036	sc.exe
4592	sc.exe

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

5bcc5563c17c7805651b50c509b6862ef554948336fbec1f99f9059a65d6b703.exelcvyfsed.exe

description	pid	process	target process
PID 1176 wrote to memory of 3340	1176	5bcc5563c17c7805651b50c509b6862ef554948336fbec1f99f9059a65d6b703.exe	cmd.exe
PID 1176 wrote to memory of 3340	1176	5bcc5563c17c7805651b50c509b6862ef554948336fbec1f99f9059a65d6b703.exe	cmd.exe
PID 1176 wrote to memory of 3340	1176	5bcc5563c17c7805651b50c509b6862ef554948336fbec1f99f9059a65d6b703.exe	cmd.exe
PID 1176 wrote to memory of 8	1176	5bcc5563c17c7805651b50c509b6862ef554948336fbec1f99f9059a65d6b703.exe	cmd.exe
PID 1176 wrote to memory of 8	1176	5bcc5563c17c7805651b50c509b6862ef554948336fbec1f99f9059a65d6b703.exe	cmd.exe
PID 1176 wrote to memory of 8	1176	5bcc5563c17c7805651b50c509b6862ef554948336fbec1f99f9059a65d6b703.exe	cmd.exe
PID 1176 wrote to memory of 4592	1176	5bcc5563c17c7805651b50c509b6862ef554948336fbec1f99f9059a65d6b703.exe	sc.exe
PID 1176 wrote to memory of 4592	1176	5bcc5563c17c7805651b50c509b6862ef554948336fbec1f99f9059a65d6b703.exe	sc.exe
PID 1176 wrote to memory of 4592	1176	5bcc5563c17c7805651b50c509b6862ef554948336fbec1f99f9059a65d6b703.exe	sc.exe
PID 1176 wrote to memory of 4372	1176	5bcc5563c17c7805651b50c509b6862ef554948336fbec1f99f9059a65d6b703.exe	sc.exe
PID 1176 wrote to memory of 4372	1176	5bcc5563c17c7805651b50c509b6862ef554948336fbec1f99f9059a65d6b703.exe	sc.exe
PID 1176 wrote to memory of 4372	1176	5bcc5563c17c7805651b50c509b6862ef554948336fbec1f99f9059a65d6b703.exe	sc.exe
PID 1176 wrote to memory of 2036	1176	5bcc5563c17c7805651b50c509b6862ef554948336fbec1f99f9059a65d6b703.exe	sc.exe
PID 1176 wrote to memory of 2036	1176	5bcc5563c17c7805651b50c509b6862ef554948336fbec1f99f9059a65d6b703.exe	sc.exe
PID 1176 wrote to memory of 2036	1176	5bcc5563c17c7805651b50c509b6862ef554948336fbec1f99f9059a65d6b703.exe	sc.exe
PID 1176 wrote to memory of 3600	1176	5bcc5563c17c7805651b50c509b6862ef554948336fbec1f99f9059a65d6b703.exe	netsh.exe
PID 1176 wrote to memory of 3600	1176	5bcc5563c17c7805651b50c509b6862ef554948336fbec1f99f9059a65d6b703.exe	netsh.exe
PID 1176 wrote to memory of 3600	1176	5bcc5563c17c7805651b50c509b6862ef554948336fbec1f99f9059a65d6b703.exe	netsh.exe
PID 524 wrote to memory of 4888	524	lcvyfsed.exe	svchost.exe
PID 524 wrote to memory of 4888	524	lcvyfsed.exe	svchost.exe
PID 524 wrote to memory of 4888	524	lcvyfsed.exe	svchost.exe
PID 524 wrote to memory of 4888	524	lcvyfsed.exe	svchost.exe
PID 524 wrote to memory of 4888	524	lcvyfsed.exe	svchost.exe

C:\Users\Admin\AppData\Local\Temp\5bcc5563c17c7805651b50c509b6862ef554948336fbec1f99f9059a65d6b703.exe
"C:\Users\Admin\AppData\Local\Temp\5bcc5563c17c7805651b50c509b6862ef554948336fbec1f99f9059a65d6b703.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1176

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\sznjxuj\
2⤵
PID:3340

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\lcvyfsed.exe" C:\Windows\SysWOW64\sznjxuj\
2⤵
PID:8

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create sznjxuj binPath= "C:\Windows\SysWOW64\sznjxuj\lcvyfsed.exe /d\"C:\Users\Admin\AppData\Local\Temp\5bcc5563c17c7805651b50c509b6862ef554948336fbec1f99f9059a65d6b703.exe\"" type= own start= auto DisplayName= "wifi support"
2⤵
- Launches sc.exe
PID:4592

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description sznjxuj "wifi internet conection"
2⤵
- Launches sc.exe
PID:4372

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start sznjxuj
2⤵
- Launches sc.exe
PID:2036

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:3600

C:\Windows\SysWOW64\sznjxuj\lcvyfsed.exe
C:\Windows\SysWOW64\sznjxuj\lcvyfsed.exe /d"C:\Users\Admin\AppData\Local\Temp\5bcc5563c17c7805651b50c509b6862ef554948336fbec1f99f9059a65d6b703.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:524

C:\Windows\SysWOW64\svchost.exe
svchost.exe
2⤵
- Sets service image path in registry
PID:4888

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\lcvyfsed.exe
Filesize
11.9MB

MD5
f761baf2daf3e9c1e09a808cc6a51423

SHA1
bef1d200bce02aee257c5c6a0ddbfe944fb8d471

SHA256
1a37899f3cdb2c8b8278af000361ffbffff820805dea5297640259d520c04c6c

SHA512
9dae437bf95c6756c14c1aabe558a5c0de1805d25284b232e05822249b8dc6ab322ea73eef9b9f83b10d164d6d83e488bef827149c217c84707b3174032b7cf7

Download Submit
C:\Windows\SysWOW64\sznjxuj\lcvyfsed.exe
Filesize
11.9MB

MD5
f761baf2daf3e9c1e09a808cc6a51423

SHA1
bef1d200bce02aee257c5c6a0ddbfe944fb8d471

SHA256
1a37899f3cdb2c8b8278af000361ffbffff820805dea5297640259d520c04c6c

SHA512
9dae437bf95c6756c14c1aabe558a5c0de1805d25284b232e05822249b8dc6ab322ea73eef9b9f83b10d164d6d83e488bef827149c217c84707b3174032b7cf7

Download Submit
memory/8-133-0x0000000000000000-mapping.dmp

Download
memory/524-142-0x0000000000400000-0x000000000041C000-memory.dmp

Filesize
112KB

Download
memory/524-146-0x0000000000400000-0x000000000041C000-memory.dmp

Filesize
112KB

Download
memory/524-141-0x0000000000400000-0x000000000041C000-memory.dmp

Filesize
112KB

Download
memory/1176-139-0x0000000000400000-0x000000000041C000-memory.dmp

Filesize
112KB

Download
memory/1176-130-0x0000000000400000-0x000000000041C000-memory.dmp

Filesize
112KB

Download
memory/1176-131-0x0000000000400000-0x000000000041C000-memory.dmp

Filesize
112KB

Download
memory/2036-137-0x0000000000000000-mapping.dmp

Download
memory/3340-132-0x0000000000000000-mapping.dmp

Download
memory/3600-138-0x0000000000000000-mapping.dmp

Download
memory/4372-136-0x0000000000000000-mapping.dmp

Download
memory/4592-135-0x0000000000000000-mapping.dmp

Download
memory/4888-144-0x00000000008F0000-0x0000000000905000-memory.dmp

Filesize
84KB

Download
memory/4888-143-0x0000000000000000-mapping.dmp

Download
memory/4888-148-0x00000000008F0000-0x0000000000905000-memory.dmp

Filesize
84KB

Download
memory/4888-149-0x00000000008F0000-0x0000000000905000-memory.dmp

Filesize
84KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads