tofsee | 2c434fce48945d04ddc4be557f2ec286a80e73596e404a369ec91e89379a8d17

General

Target

fed7c4e47ea734756b34a457fbb402ce63624e1c8bbe48441a9634f4130e022c.exe
Size

246KB
MD5

6bdec1b519e961a4d757be0541c6e343
SHA1

fc1208a0eacf1e21f0199d7748292c8a5a114f0f
SHA256

fed7c4e47ea734756b34a457fbb402ce63624e1c8bbe48441a9634f4130e022c
SHA512

c9d4eb8560410d480b8724ca2ef8c9681ea849c65497ffb2b89884cab65265269d03fc2b434b77b5a2b64cd3eebdd8f8dde18334b9fbea3f5783cbb9972bf406
SSDEEP

3072:v036cBx3W3XK0mC5WcvmiK3dmXsxkgaBChhqLQV:HXK0DkYNABigaQq8V

Score

10^/10

tofsee discovery evasion execution persistence privilege_escalation trojan

Malware Config

Extracted

Family

tofsee

C2

patmushta.info

ovicrush.cn

Signatures

Tofsee
Backdoor/botnet which carries out malicious activities based on commands from a C2 server.
trojan tofsee
Tofsee family
tofsee
Creates new service(s) 2 TTPs
persistence execution

Windows Service
T1543.003

Service Execution
T1569.002

Modifies Windows Firewall 2 TTPs 1 IoCs

evasion

Windows Service

T1543.003

Disable or Modify System Firewall

T1562.004

pid	Process
1896	netsh.exe

Sets service image path in registry 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\smmdasbl\ImagePath = "C:\\Windows\\SysWOW64\\smmdasbl\\rdmfvvzq.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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-940901362-3608833189-1915618603-1000\Control Panel\International\Geo\Nation	fed7c4e47ea734756b34a457fbb402ce63624e1c8bbe48441a9634f4130e022c.exe

Deletes itself 1 IoCs

pid	Process
2272	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
400	rdmfvvzq.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 400 set thread context of 2272	400	rdmfvvzq.exe	101

Launches sc.exe 3 IoCs

Sc.exe is a Windows utlilty to control services on the system.

pid	Process
4484	sc.exe
2172	sc.exe
996	sc.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Event Triggered Execution: Netsh Helper DLL 1 TTPs 3 IoCs

Netsh.exe (also referred to as Netshell) is a command-line scripting utility used to interact with the network configuration of a system.

persistence privilege_escalation

Netsh Helper DLL

T1546.007

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe
Key queried	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe
Key value enumerated	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe

Program crash 2 IoCs

pid	pid_target	Process	procid_target
4784	3652	WerFault.exe	82
440	400	WerFault.exe	94

System Location Discovery: System Language Discovery 1 TTPs 9 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rdmfvvzq.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	netsh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	fed7c4e47ea734756b34a457fbb402ce63624e1c8bbe48441a9634f4130e022c.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 3652 wrote to memory of 4844	3652	fed7c4e47ea734756b34a457fbb402ce63624e1c8bbe48441a9634f4130e022c.exe	83
PID 3652 wrote to memory of 4844	3652	fed7c4e47ea734756b34a457fbb402ce63624e1c8bbe48441a9634f4130e022c.exe	83
PID 3652 wrote to memory of 4844	3652	fed7c4e47ea734756b34a457fbb402ce63624e1c8bbe48441a9634f4130e022c.exe	83
PID 3652 wrote to memory of 2092	3652	fed7c4e47ea734756b34a457fbb402ce63624e1c8bbe48441a9634f4130e022c.exe	85
PID 3652 wrote to memory of 2092	3652	fed7c4e47ea734756b34a457fbb402ce63624e1c8bbe48441a9634f4130e022c.exe	85
PID 3652 wrote to memory of 2092	3652	fed7c4e47ea734756b34a457fbb402ce63624e1c8bbe48441a9634f4130e022c.exe	85
PID 3652 wrote to memory of 996	3652	fed7c4e47ea734756b34a457fbb402ce63624e1c8bbe48441a9634f4130e022c.exe	87
PID 3652 wrote to memory of 996	3652	fed7c4e47ea734756b34a457fbb402ce63624e1c8bbe48441a9634f4130e022c.exe	87
PID 3652 wrote to memory of 996	3652	fed7c4e47ea734756b34a457fbb402ce63624e1c8bbe48441a9634f4130e022c.exe	87
PID 3652 wrote to memory of 4484	3652	fed7c4e47ea734756b34a457fbb402ce63624e1c8bbe48441a9634f4130e022c.exe	90
PID 3652 wrote to memory of 4484	3652	fed7c4e47ea734756b34a457fbb402ce63624e1c8bbe48441a9634f4130e022c.exe	90
PID 3652 wrote to memory of 4484	3652	fed7c4e47ea734756b34a457fbb402ce63624e1c8bbe48441a9634f4130e022c.exe	90
PID 3652 wrote to memory of 2172	3652	fed7c4e47ea734756b34a457fbb402ce63624e1c8bbe48441a9634f4130e022c.exe	92
PID 3652 wrote to memory of 2172	3652	fed7c4e47ea734756b34a457fbb402ce63624e1c8bbe48441a9634f4130e022c.exe	92
PID 3652 wrote to memory of 2172	3652	fed7c4e47ea734756b34a457fbb402ce63624e1c8bbe48441a9634f4130e022c.exe	92
PID 3652 wrote to memory of 1896	3652	fed7c4e47ea734756b34a457fbb402ce63624e1c8bbe48441a9634f4130e022c.exe	95
PID 3652 wrote to memory of 1896	3652	fed7c4e47ea734756b34a457fbb402ce63624e1c8bbe48441a9634f4130e022c.exe	95
PID 3652 wrote to memory of 1896	3652	fed7c4e47ea734756b34a457fbb402ce63624e1c8bbe48441a9634f4130e022c.exe	95
PID 400 wrote to memory of 2272	400	rdmfvvzq.exe	101
PID 400 wrote to memory of 2272	400	rdmfvvzq.exe	101
PID 400 wrote to memory of 2272	400	rdmfvvzq.exe	101
PID 400 wrote to memory of 2272	400	rdmfvvzq.exe	101
PID 400 wrote to memory of 2272	400	rdmfvvzq.exe	101

C:\Users\Admin\AppData\Local\Temp\fed7c4e47ea734756b34a457fbb402ce63624e1c8bbe48441a9634f4130e022c.exe
"C:\Users\Admin\AppData\Local\Temp\fed7c4e47ea734756b34a457fbb402ce63624e1c8bbe48441a9634f4130e022c.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3652
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\smmdasbl\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4844
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\rdmfvvzq.exe" C:\Windows\SysWOW64\smmdasbl\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2092
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create smmdasbl binPath= "C:\Windows\SysWOW64\smmdasbl\rdmfvvzq.exe /d\"C:\Users\Admin\AppData\Local\Temp\fed7c4e47ea734756b34a457fbb402ce63624e1c8bbe48441a9634f4130e022c.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:996
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description smmdasbl "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4484
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start smmdasbl
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2172
- 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
  - Event Triggered Execution: Netsh Helper DLL
  - System Location Discovery: System Language Discovery
  PID:1896
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3652 -s 668
  2⤵
  - Program crash
  PID:4784

C:\Windows\SysWOW64\smmdasbl\rdmfvvzq.exe
C:\Windows\SysWOW64\smmdasbl\rdmfvvzq.exe /d"C:\Users\Admin\AppData\Local\Temp\fed7c4e47ea734756b34a457fbb402ce63624e1c8bbe48441a9634f4130e022c.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:400
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:2272
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 400 -s 540
  2⤵
  - Program crash
  PID:440

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 3652 -ip 3652
1⤵
PID:2024

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 472 -p 400 -ip 400
1⤵
PID:3992

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

System Services

1

T1569

Service Execution

1

T1569.002

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Create or Modify System Process

2

T1543

Windows Service

2

T1543.003

Event Triggered Execution

1

T1546

Netsh Helper DLL

1

T1546.007

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Create or Modify System Process

2

T1543

Windows Service

2

T1543.003

Event Triggered Execution

1

T1546

Netsh Helper DLL

1

T1546.007

Defense Evasion

Impair Defenses

1

T1562

Disable or Modify System Firewall

Modify Registry

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\rdmfvvzq.exe

Filesize
14.9MB

MD5
8ea59fcbaaf6d7257818caf91ba383b8

SHA1
9ef9d2a0fe89ba013d4ae21778a117e452fc03c3

SHA256
c585d469c590ad27794385fb66755d93821f015800be7114ebbc8a4a303efc36

SHA512
a7a1e7b510561795211c565a172789b44b625df6514d20bc1868623b3e5abc3037765fcc59c5d4466fb4b6c9e25f7bd48fecabbab3c7df6038b49bdce0412db5

Download Submit
memory/400-14-0x0000000000400000-0x0000000000656000-memory.dmp

Filesize
2.3MB

Download
memory/2272-10-0x0000000000770000-0x0000000000785000-memory.dmp

Filesize
84KB

Download
memory/2272-12-0x0000000000770000-0x0000000000785000-memory.dmp

Filesize
84KB

Download
memory/2272-13-0x0000000000770000-0x0000000000785000-memory.dmp

Filesize
84KB

Download
memory/3652-0-0x0000000000900000-0x000000000090D000-memory.dmp

Filesize
52KB

Download
memory/3652-1-0x0000000000910000-0x0000000000923000-memory.dmp

Filesize
76KB

Download
memory/3652-2-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/3652-9-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/3652-8-0x0000000000910000-0x0000000000923000-memory.dmp

Filesize
76KB

Download
memory/3652-7-0x0000000000900000-0x000000000090D000-memory.dmp

Filesize
52KB

Download
memory/3652-6-0x0000000000400000-0x0000000000656000-memory.dmp

Filesize
2.3MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads