tofsee | e6868219c5cf3cc5bb04c31613dc2efc36914d329b1fa04d1164d5cde1f07913

General

Target

e12ec9871450a8052f6bb79066950faa5c1e3d1490884e07e345be9d1608e4fd.exe
Size

10.3MB
MD5

8c461c7cf6bec9a8b48f68c4ab4bdf2d
SHA1

bebe51ce9da26fb9c5fcce2e1dfb16424d829a85
SHA256

e12ec9871450a8052f6bb79066950faa5c1e3d1490884e07e345be9d1608e4fd
SHA512

0cb135b0a9a8d0771ba453b3456a0941135437fb2adbc20f6ee38174c62474e4710b33c0d36d5508df0faae9411377b74390ddb32edb28289f11592282a20f4f
SSDEEP

49152:/ppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppt:

Score

10^/10

tofsee discovery evasion execution persistence privilege_escalation trojan

Malware Config

Extracted

Family

tofsee

C2

mubrikych.top

oxxyfix.xyz

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
3948	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\iwyimaxw\ImagePath = "C:\\Windows\\SysWOW64\\iwyimaxw\\llhxzdtk.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-1-5-21-2045521122-590294423-3465680274-1000\Control Panel\International\Geo\Nation	e12ec9871450a8052f6bb79066950faa5c1e3d1490884e07e345be9d1608e4fd.exe

Deletes itself 1 IoCs

pid	Process
2920	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
4576	llhxzdtk.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4576 set thread context of 2920	4576	llhxzdtk.exe	105

Launches sc.exe 3 IoCs

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

pid	Process
3628	sc.exe
2172	sc.exe
4616	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
1088	1832	WerFault.exe	82
2008	4576	WerFault.exe	93

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	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	e12ec9871450a8052f6bb79066950faa5c1e3d1490884e07e345be9d1608e4fd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	netsh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	llhxzdtk.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 1832 wrote to memory of 4604	1832	e12ec9871450a8052f6bb79066950faa5c1e3d1490884e07e345be9d1608e4fd.exe	83
PID 1832 wrote to memory of 4604	1832	e12ec9871450a8052f6bb79066950faa5c1e3d1490884e07e345be9d1608e4fd.exe	83
PID 1832 wrote to memory of 4604	1832	e12ec9871450a8052f6bb79066950faa5c1e3d1490884e07e345be9d1608e4fd.exe	83
PID 1832 wrote to memory of 3408	1832	e12ec9871450a8052f6bb79066950faa5c1e3d1490884e07e345be9d1608e4fd.exe	85
PID 1832 wrote to memory of 3408	1832	e12ec9871450a8052f6bb79066950faa5c1e3d1490884e07e345be9d1608e4fd.exe	85
PID 1832 wrote to memory of 3408	1832	e12ec9871450a8052f6bb79066950faa5c1e3d1490884e07e345be9d1608e4fd.exe	85
PID 1832 wrote to memory of 3628	1832	e12ec9871450a8052f6bb79066950faa5c1e3d1490884e07e345be9d1608e4fd.exe	87
PID 1832 wrote to memory of 3628	1832	e12ec9871450a8052f6bb79066950faa5c1e3d1490884e07e345be9d1608e4fd.exe	87
PID 1832 wrote to memory of 3628	1832	e12ec9871450a8052f6bb79066950faa5c1e3d1490884e07e345be9d1608e4fd.exe	87
PID 1832 wrote to memory of 2172	1832	e12ec9871450a8052f6bb79066950faa5c1e3d1490884e07e345be9d1608e4fd.exe	89
PID 1832 wrote to memory of 2172	1832	e12ec9871450a8052f6bb79066950faa5c1e3d1490884e07e345be9d1608e4fd.exe	89
PID 1832 wrote to memory of 2172	1832	e12ec9871450a8052f6bb79066950faa5c1e3d1490884e07e345be9d1608e4fd.exe	89
PID 1832 wrote to memory of 4616	1832	e12ec9871450a8052f6bb79066950faa5c1e3d1490884e07e345be9d1608e4fd.exe	91
PID 1832 wrote to memory of 4616	1832	e12ec9871450a8052f6bb79066950faa5c1e3d1490884e07e345be9d1608e4fd.exe	91
PID 1832 wrote to memory of 4616	1832	e12ec9871450a8052f6bb79066950faa5c1e3d1490884e07e345be9d1608e4fd.exe	91
PID 1832 wrote to memory of 3948	1832	e12ec9871450a8052f6bb79066950faa5c1e3d1490884e07e345be9d1608e4fd.exe	94
PID 1832 wrote to memory of 3948	1832	e12ec9871450a8052f6bb79066950faa5c1e3d1490884e07e345be9d1608e4fd.exe	94
PID 1832 wrote to memory of 3948	1832	e12ec9871450a8052f6bb79066950faa5c1e3d1490884e07e345be9d1608e4fd.exe	94
PID 4576 wrote to memory of 2920	4576	llhxzdtk.exe	105
PID 4576 wrote to memory of 2920	4576	llhxzdtk.exe	105
PID 4576 wrote to memory of 2920	4576	llhxzdtk.exe	105
PID 4576 wrote to memory of 2920	4576	llhxzdtk.exe	105
PID 4576 wrote to memory of 2920	4576	llhxzdtk.exe	105

C:\Users\Admin\AppData\Local\Temp\e12ec9871450a8052f6bb79066950faa5c1e3d1490884e07e345be9d1608e4fd.exe
"C:\Users\Admin\AppData\Local\Temp\e12ec9871450a8052f6bb79066950faa5c1e3d1490884e07e345be9d1608e4fd.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1832
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\iwyimaxw\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4604
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\llhxzdtk.exe" C:\Windows\SysWOW64\iwyimaxw\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:3408
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create iwyimaxw binPath= "C:\Windows\SysWOW64\iwyimaxw\llhxzdtk.exe /d\"C:\Users\Admin\AppData\Local\Temp\e12ec9871450a8052f6bb79066950faa5c1e3d1490884e07e345be9d1608e4fd.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3628
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description iwyimaxw "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2172
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start iwyimaxw
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4616
- 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:3948
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1832 -s 888
  2⤵
  - Program crash
  PID:1088

C:\Windows\SysWOW64\iwyimaxw\llhxzdtk.exe
C:\Windows\SysWOW64\iwyimaxw\llhxzdtk.exe /d"C:\Users\Admin\AppData\Local\Temp\e12ec9871450a8052f6bb79066950faa5c1e3d1490884e07e345be9d1608e4fd.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4576
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:2920
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4576 -s 512
  2⤵
  - Program crash
  PID:2008

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 464 -p 1832 -ip 1832
1⤵
PID:2024

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 492 -p 4576 -ip 4576
1⤵
PID:3740

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

Replay Monitor

Loading Replay Monitor...

Downloads

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

Filesize
10.3MB

MD5
8c461c7cf6bec9a8b48f68c4ab4bdf2d

SHA1
bebe51ce9da26fb9c5fcce2e1dfb16424d829a85

SHA256
e12ec9871450a8052f6bb79066950faa5c1e3d1490884e07e345be9d1608e4fd

SHA512
0cb135b0a9a8d0771ba453b3456a0941135437fb2adbc20f6ee38174c62474e4710b33c0d36d5508df0faae9411377b74390ddb32edb28289f11592282a20f4f

Download Submit
memory/1832-7-0x0000000000940000-0x000000000094D000-memory.dmp

Filesize
52KB

Download
memory/1832-2-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/1832-1-0x0000000000980000-0x0000000000993000-memory.dmp

Filesize
76KB

Download
memory/1832-9-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/1832-8-0x0000000000980000-0x0000000000993000-memory.dmp

Filesize
76KB

Download
memory/1832-0-0x0000000000940000-0x000000000094D000-memory.dmp

Filesize
52KB

Download
memory/1832-6-0x0000000000400000-0x0000000000826000-memory.dmp

Filesize
4.1MB

Download
memory/2920-15-0x00000000010A0000-0x00000000010B5000-memory.dmp

Filesize
84KB

Download
memory/2920-13-0x00000000010A0000-0x00000000010B5000-memory.dmp

Filesize
84KB

Download
memory/2920-16-0x00000000010A0000-0x00000000010B5000-memory.dmp

Filesize
84KB

Download
memory/4576-12-0x0000000000400000-0x0000000000826000-memory.dmp

Filesize
4.1MB

Download
memory/4576-10-0x0000000000400000-0x0000000000826000-memory.dmp

Filesize
4.1MB

Download
memory/4576-11-0x0000000000400000-0x0000000000826000-memory.dmp

Filesize
4.1MB

Download
memory/4576-17-0x0000000000400000-0x0000000000826000-memory.dmp

Filesize
4.1MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads