tofsee | 35c35175c681c805e8b12413243324b24573f63533d649f0d88e2b8b58b90182

General

Target

35c35175c681c805e8b12413243324b24573f63533d649f0d88e2b8b58b90182.exe
Size

121KB
MD5

dccd504e5e44c162e8461ad9ad286ee3
SHA1

e2a68b76db070380809754b7a0fa1cf8a0786f27
SHA256

35c35175c681c805e8b12413243324b24573f63533d649f0d88e2b8b58b90182
SHA512

b52b884420af198361ee650ca61ee9b64463b89469d0d54c8a00c06cdf27ff201ecd6262c3dc3cb959d487c8040e2e3d993f8fc09e8f59bf8c5e74119a69ff04

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:

mvnmvhlc.exe

pid process

2692 mvnmvhlc.exe
Modifies Windows Firewall 1 TTPs 1 IoCs
evasion

Modify Existing Service
T1031

Processes:

netsh.exe

pid process

4736 netsh.exe

pid	process
2692	mvnmvhlc.exe

pid	process
4736	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\zxbbqtgr\ImagePath = "C:\\Windows\\SysWOW64\\zxbbqtgr\\mvnmvhlc.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:

35c35175c681c805e8b12413243324b24573f63533d649f0d88e2b8b58b90182.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3751123196-3323558407-1869646069-1000\Control Panel\International\Geo\Nation	35c35175c681c805e8b12413243324b24573f63533d649f0d88e2b8b58b90182.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

mvnmvhlc.exe

description pid process target process

PID 2692 set thread context of 3412 2692 mvnmvhlc.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

3604 sc.exe
4472 sc.exe
1480 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 2692 set thread context of 3412	2692	mvnmvhlc.exe	svchost.exe

pid	process
3604	sc.exe
4472	sc.exe
1480	sc.exe

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

35c35175c681c805e8b12413243324b24573f63533d649f0d88e2b8b58b90182.exemvnmvhlc.exe

description	pid	process	target process
PID 1108 wrote to memory of 3032	1108	35c35175c681c805e8b12413243324b24573f63533d649f0d88e2b8b58b90182.exe	cmd.exe
PID 1108 wrote to memory of 3032	1108	35c35175c681c805e8b12413243324b24573f63533d649f0d88e2b8b58b90182.exe	cmd.exe
PID 1108 wrote to memory of 3032	1108	35c35175c681c805e8b12413243324b24573f63533d649f0d88e2b8b58b90182.exe	cmd.exe
PID 1108 wrote to memory of 2204	1108	35c35175c681c805e8b12413243324b24573f63533d649f0d88e2b8b58b90182.exe	cmd.exe
PID 1108 wrote to memory of 2204	1108	35c35175c681c805e8b12413243324b24573f63533d649f0d88e2b8b58b90182.exe	cmd.exe
PID 1108 wrote to memory of 2204	1108	35c35175c681c805e8b12413243324b24573f63533d649f0d88e2b8b58b90182.exe	cmd.exe
PID 1108 wrote to memory of 3604	1108	35c35175c681c805e8b12413243324b24573f63533d649f0d88e2b8b58b90182.exe	sc.exe
PID 1108 wrote to memory of 3604	1108	35c35175c681c805e8b12413243324b24573f63533d649f0d88e2b8b58b90182.exe	sc.exe
PID 1108 wrote to memory of 3604	1108	35c35175c681c805e8b12413243324b24573f63533d649f0d88e2b8b58b90182.exe	sc.exe
PID 1108 wrote to memory of 4472	1108	35c35175c681c805e8b12413243324b24573f63533d649f0d88e2b8b58b90182.exe	sc.exe
PID 1108 wrote to memory of 4472	1108	35c35175c681c805e8b12413243324b24573f63533d649f0d88e2b8b58b90182.exe	sc.exe
PID 1108 wrote to memory of 4472	1108	35c35175c681c805e8b12413243324b24573f63533d649f0d88e2b8b58b90182.exe	sc.exe
PID 1108 wrote to memory of 1480	1108	35c35175c681c805e8b12413243324b24573f63533d649f0d88e2b8b58b90182.exe	sc.exe
PID 1108 wrote to memory of 1480	1108	35c35175c681c805e8b12413243324b24573f63533d649f0d88e2b8b58b90182.exe	sc.exe
PID 1108 wrote to memory of 1480	1108	35c35175c681c805e8b12413243324b24573f63533d649f0d88e2b8b58b90182.exe	sc.exe
PID 2692 wrote to memory of 3412	2692	mvnmvhlc.exe	svchost.exe
PID 2692 wrote to memory of 3412	2692	mvnmvhlc.exe	svchost.exe
PID 2692 wrote to memory of 3412	2692	mvnmvhlc.exe	svchost.exe
PID 2692 wrote to memory of 3412	2692	mvnmvhlc.exe	svchost.exe
PID 2692 wrote to memory of 3412	2692	mvnmvhlc.exe	svchost.exe
PID 1108 wrote to memory of 4736	1108	35c35175c681c805e8b12413243324b24573f63533d649f0d88e2b8b58b90182.exe	netsh.exe
PID 1108 wrote to memory of 4736	1108	35c35175c681c805e8b12413243324b24573f63533d649f0d88e2b8b58b90182.exe	netsh.exe
PID 1108 wrote to memory of 4736	1108	35c35175c681c805e8b12413243324b24573f63533d649f0d88e2b8b58b90182.exe	netsh.exe

C:\Users\Admin\AppData\Local\Temp\35c35175c681c805e8b12413243324b24573f63533d649f0d88e2b8b58b90182.exe
"C:\Users\Admin\AppData\Local\Temp\35c35175c681c805e8b12413243324b24573f63533d649f0d88e2b8b58b90182.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1108

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\zxbbqtgr\
2⤵
PID:3032

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\mvnmvhlc.exe" C:\Windows\SysWOW64\zxbbqtgr\
2⤵
PID:2204

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create zxbbqtgr binPath= "C:\Windows\SysWOW64\zxbbqtgr\mvnmvhlc.exe /d\"C:\Users\Admin\AppData\Local\Temp\35c35175c681c805e8b12413243324b24573f63533d649f0d88e2b8b58b90182.exe\"" type= own start= auto DisplayName= "wifi support"
2⤵
- Launches sc.exe
PID:3604

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description zxbbqtgr "wifi internet conection"
2⤵
- Launches sc.exe
PID:4472

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start zxbbqtgr
2⤵
- Launches sc.exe
PID:1480

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:4736

C:\Windows\SysWOW64\zxbbqtgr\mvnmvhlc.exe
C:\Windows\SysWOW64\zxbbqtgr\mvnmvhlc.exe /d"C:\Users\Admin\AppData\Local\Temp\35c35175c681c805e8b12413243324b24573f63533d649f0d88e2b8b58b90182.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2692

C:\Windows\SysWOW64\svchost.exe
svchost.exe
2⤵
- Sets service image path in registry
PID:3412

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\mvnmvhlc.exe
Filesize
14.0MB

MD5
8248edee2a1b5504115e5037f32f5db0

SHA1
e83863ca8a2a371088c6dfef4bf737f85928bc8b

SHA256
8ac92bc65c6246e91d530394c62c8df41ce104dfdba0c20818e60577cf211bf5

SHA512
dfc923e9d651df37bd29bcbea0a8b6afe08913d32c2d204a8a2598d8611972bc19959071f1d291c4a8889c4331e4a9e789200101d8de707b732621f82ad27a5d

Download Submit
C:\Windows\SysWOW64\zxbbqtgr\mvnmvhlc.exe
Filesize
14.0MB

MD5
8248edee2a1b5504115e5037f32f5db0

SHA1
e83863ca8a2a371088c6dfef4bf737f85928bc8b

SHA256
8ac92bc65c6246e91d530394c62c8df41ce104dfdba0c20818e60577cf211bf5

SHA512
dfc923e9d651df37bd29bcbea0a8b6afe08913d32c2d204a8a2598d8611972bc19959071f1d291c4a8889c4331e4a9e789200101d8de707b732621f82ad27a5d

Download Submit
memory/1108-130-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/1480-136-0x0000000000000000-mapping.dmp

Download
memory/2204-132-0x0000000000000000-mapping.dmp

Download
memory/2692-138-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/3032-131-0x0000000000000000-mapping.dmp

Download
memory/3412-139-0x0000000000000000-mapping.dmp

Download
memory/3412-140-0x0000000000550000-0x0000000000565000-memory.dmp

Filesize
84KB

Download
memory/3412-144-0x0000000000550000-0x0000000000565000-memory.dmp

Filesize
84KB

Download
memory/3412-145-0x0000000000550000-0x0000000000565000-memory.dmp

Filesize
84KB

Download
memory/3604-134-0x0000000000000000-mapping.dmp

Download
memory/4472-135-0x0000000000000000-mapping.dmp

Download
memory/4736-141-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads