tofsee | 61ae4532d70c8ea72ad9739ade04758e2eb34b9d6333a7879517550bdcc1a26b

General

Target

786f5910ef3eb2b58bc6795067a0ee8f7a318bc09354e167220c81712087a007.exe
Size

312KB
MD5

62b75bff0859e20c5a8a2ec94ec1ebdc
SHA1

2385c826549d8e526229e081173ec54fb9498be0
SHA256

786f5910ef3eb2b58bc6795067a0ee8f7a318bc09354e167220c81712087a007
SHA512

1f056472c5d90b791af941ba97d252c7f4c7aee1a95128e273be7e4f41445321707a478f64c0e1e209bea6f666662e1a82e315a01c777f0308015d416c18f0e4
SSDEEP

3072:zk0/LshkyJORLxH6dgiOxO2IYDWxT7qwA3OEQf9ltLCWrxpzbgqruJnfed:Q0/LsnORGhrxTqrKeuzbgwuJG

Score

10^/10

tofsee discovery evasion execution persistence privilege_escalation trojan

Malware Config

Extracted

Family

tofsee

C2

patmushta.info

parubey.info

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
3544	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\rvjmpqdl\ImagePath = "C:\\Windows\\SysWOW64\\rvjmpqdl\\euisuyhc.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-1-5-21-3350944739-639801879-157714471-1000\Control Panel\International\Geo\Nation	786f5910ef3eb2b58bc6795067a0ee8f7a318bc09354e167220c81712087a007.exe

Deletes itself 1 IoCs

pid	Process
3504	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
544	euisuyhc.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 544 set thread context of 3504	544	euisuyhc.exe	101

Launches sc.exe 3 IoCs

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

pid	Process
3040	sc.exe
708	sc.exe
2188	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
2328	3164	WerFault.exe	82
2776	544	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	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	786f5910ef3eb2b58bc6795067a0ee8f7a318bc09354e167220c81712087a007.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	euisuyhc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	netsh.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 3164 wrote to memory of 5036	3164	786f5910ef3eb2b58bc6795067a0ee8f7a318bc09354e167220c81712087a007.exe	83
PID 3164 wrote to memory of 5036	3164	786f5910ef3eb2b58bc6795067a0ee8f7a318bc09354e167220c81712087a007.exe	83
PID 3164 wrote to memory of 5036	3164	786f5910ef3eb2b58bc6795067a0ee8f7a318bc09354e167220c81712087a007.exe	83
PID 3164 wrote to memory of 1112	3164	786f5910ef3eb2b58bc6795067a0ee8f7a318bc09354e167220c81712087a007.exe	85
PID 3164 wrote to memory of 1112	3164	786f5910ef3eb2b58bc6795067a0ee8f7a318bc09354e167220c81712087a007.exe	85
PID 3164 wrote to memory of 1112	3164	786f5910ef3eb2b58bc6795067a0ee8f7a318bc09354e167220c81712087a007.exe	85
PID 3164 wrote to memory of 2188	3164	786f5910ef3eb2b58bc6795067a0ee8f7a318bc09354e167220c81712087a007.exe	87
PID 3164 wrote to memory of 2188	3164	786f5910ef3eb2b58bc6795067a0ee8f7a318bc09354e167220c81712087a007.exe	87
PID 3164 wrote to memory of 2188	3164	786f5910ef3eb2b58bc6795067a0ee8f7a318bc09354e167220c81712087a007.exe	87
PID 3164 wrote to memory of 3040	3164	786f5910ef3eb2b58bc6795067a0ee8f7a318bc09354e167220c81712087a007.exe	89
PID 3164 wrote to memory of 3040	3164	786f5910ef3eb2b58bc6795067a0ee8f7a318bc09354e167220c81712087a007.exe	89
PID 3164 wrote to memory of 3040	3164	786f5910ef3eb2b58bc6795067a0ee8f7a318bc09354e167220c81712087a007.exe	89
PID 3164 wrote to memory of 708	3164	786f5910ef3eb2b58bc6795067a0ee8f7a318bc09354e167220c81712087a007.exe	92
PID 3164 wrote to memory of 708	3164	786f5910ef3eb2b58bc6795067a0ee8f7a318bc09354e167220c81712087a007.exe	92
PID 3164 wrote to memory of 708	3164	786f5910ef3eb2b58bc6795067a0ee8f7a318bc09354e167220c81712087a007.exe	92
PID 3164 wrote to memory of 3544	3164	786f5910ef3eb2b58bc6795067a0ee8f7a318bc09354e167220c81712087a007.exe	95
PID 3164 wrote to memory of 3544	3164	786f5910ef3eb2b58bc6795067a0ee8f7a318bc09354e167220c81712087a007.exe	95
PID 3164 wrote to memory of 3544	3164	786f5910ef3eb2b58bc6795067a0ee8f7a318bc09354e167220c81712087a007.exe	95
PID 544 wrote to memory of 3504	544	euisuyhc.exe	101
PID 544 wrote to memory of 3504	544	euisuyhc.exe	101
PID 544 wrote to memory of 3504	544	euisuyhc.exe	101
PID 544 wrote to memory of 3504	544	euisuyhc.exe	101
PID 544 wrote to memory of 3504	544	euisuyhc.exe	101

C:\Users\Admin\AppData\Local\Temp\786f5910ef3eb2b58bc6795067a0ee8f7a318bc09354e167220c81712087a007.exe
"C:\Users\Admin\AppData\Local\Temp\786f5910ef3eb2b58bc6795067a0ee8f7a318bc09354e167220c81712087a007.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3164
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\rvjmpqdl\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:5036
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\euisuyhc.exe" C:\Windows\SysWOW64\rvjmpqdl\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:1112
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create rvjmpqdl binPath= "C:\Windows\SysWOW64\rvjmpqdl\euisuyhc.exe /d\"C:\Users\Admin\AppData\Local\Temp\786f5910ef3eb2b58bc6795067a0ee8f7a318bc09354e167220c81712087a007.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2188
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description rvjmpqdl "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3040
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start rvjmpqdl
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:708
- 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:3544
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3164 -s 668
  2⤵
  - Program crash
  PID:2328

C:\Windows\SysWOW64\rvjmpqdl\euisuyhc.exe
C:\Windows\SysWOW64\rvjmpqdl\euisuyhc.exe /d"C:\Users\Admin\AppData\Local\Temp\786f5910ef3eb2b58bc6795067a0ee8f7a318bc09354e167220c81712087a007.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:544
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:3504
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 544 -s 516
  2⤵
  - Program crash
  PID:2776

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 416 -p 3164 -ip 3164
1⤵
PID:3660

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 452 -p 544 -ip 544
1⤵
PID:4792

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\euisuyhc.exe

Filesize
11.1MB

MD5
10abe98dc7b387d9e153d049c918ef83

SHA1
d7e87fcab3c46548a82377a0a0632c6f12799b2b

SHA256
0dd518a2caf5cc732e16cdb90380808f958a754eac395c78973b7b77ba45d096

SHA512
f62722ef1363835bc7567c7399dd73e8752255f000241b1d75d0a2d29bc4553b626cc7e95a8ad8a0b7bb3c864acb36fcc889cb5ab9ed7f5407f40960f0c3fc33

Download Submit
memory/544-11-0x0000000000400000-0x0000000000456000-memory.dmp

Filesize
344KB

Download
memory/544-13-0x0000000000400000-0x0000000000456000-memory.dmp

Filesize
344KB

Download
memory/544-18-0x0000000000400000-0x0000000000456000-memory.dmp

Filesize
344KB

Download
memory/544-10-0x0000000000400000-0x0000000000456000-memory.dmp

Filesize
344KB

Download
memory/3164-9-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/3164-8-0x00000000021B0000-0x00000000021C3000-memory.dmp

Filesize
76KB

Download
memory/3164-7-0x00000000021A0000-0x00000000021AD000-memory.dmp

Filesize
52KB

Download
memory/3164-6-0x0000000000400000-0x0000000000456000-memory.dmp

Filesize
344KB

Download
memory/3164-0-0x00000000021A0000-0x00000000021AD000-memory.dmp

Filesize
52KB

Download
memory/3164-2-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/3164-1-0x00000000021B0000-0x00000000021C3000-memory.dmp

Filesize
76KB

Download
memory/3504-12-0x0000000000F40000-0x0000000000F55000-memory.dmp

Filesize
84KB

Download
memory/3504-15-0x0000000000F40000-0x0000000000F55000-memory.dmp

Filesize
84KB

Download
memory/3504-16-0x0000000000F40000-0x0000000000F55000-memory.dmp

Filesize
84KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads