tofsee | d3ad591f0689b854fe488a00451cafca5f4497ca7ca77718ee48195ad213d830

General

Target

cc405e27cf3c45f22534764ed6c2c3d7dc46264b4c275cfc53b3cf6707c211a5.exe
Size

10.1MB
MD5

f777ab88e7988a6197689c84bd5c200b
SHA1

9b8f94fe18fcfcbbb6ca1736751d6ca5ee417766
SHA256

cc405e27cf3c45f22534764ed6c2c3d7dc46264b4c275cfc53b3cf6707c211a5
SHA512

9e9730d5ee6629003f29dcd9193ccd09acfa52256439a8408019273fd12b5c87138de4459d659c63a7eb505cc81039a50767ca33adf687a389a40aeb6ba64436
SSDEEP

12288:Iz+wSUpBMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMs:Iz8

Score

10^/10

tofsee discovery evasion execution persistence privilege_escalation 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) 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
3088	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\vsfflfop\ImagePath = "C:\\Windows\\SysWOW64\\vsfflfop\\naorttre.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-1-5-21-656926755-4116854191-210765258-1000\Control Panel\International\Geo\Nation	cc405e27cf3c45f22534764ed6c2c3d7dc46264b4c275cfc53b3cf6707c211a5.exe

Deletes itself 1 IoCs

pid	Process
2444	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
1516	naorttre.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1516 set thread context of 2444	1516	naorttre.exe	103

Launches sc.exe 3 IoCs

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

pid	Process
5072	sc.exe
5048	sc.exe
4252	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 queried	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe
Key value enumerated	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe
Key opened	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe

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	netsh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	naorttre.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.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	cc405e27cf3c45f22534764ed6c2c3d7dc46264b4c275cfc53b3cf6707c211a5.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 2648 wrote to memory of 1092	2648	cc405e27cf3c45f22534764ed6c2c3d7dc46264b4c275cfc53b3cf6707c211a5.exe	87
PID 2648 wrote to memory of 1092	2648	cc405e27cf3c45f22534764ed6c2c3d7dc46264b4c275cfc53b3cf6707c211a5.exe	87
PID 2648 wrote to memory of 1092	2648	cc405e27cf3c45f22534764ed6c2c3d7dc46264b4c275cfc53b3cf6707c211a5.exe	87
PID 2648 wrote to memory of 4812	2648	cc405e27cf3c45f22534764ed6c2c3d7dc46264b4c275cfc53b3cf6707c211a5.exe	91
PID 2648 wrote to memory of 4812	2648	cc405e27cf3c45f22534764ed6c2c3d7dc46264b4c275cfc53b3cf6707c211a5.exe	91
PID 2648 wrote to memory of 4812	2648	cc405e27cf3c45f22534764ed6c2c3d7dc46264b4c275cfc53b3cf6707c211a5.exe	91
PID 2648 wrote to memory of 5072	2648	cc405e27cf3c45f22534764ed6c2c3d7dc46264b4c275cfc53b3cf6707c211a5.exe	94
PID 2648 wrote to memory of 5072	2648	cc405e27cf3c45f22534764ed6c2c3d7dc46264b4c275cfc53b3cf6707c211a5.exe	94
PID 2648 wrote to memory of 5072	2648	cc405e27cf3c45f22534764ed6c2c3d7dc46264b4c275cfc53b3cf6707c211a5.exe	94
PID 2648 wrote to memory of 5048	2648	cc405e27cf3c45f22534764ed6c2c3d7dc46264b4c275cfc53b3cf6707c211a5.exe	96
PID 2648 wrote to memory of 5048	2648	cc405e27cf3c45f22534764ed6c2c3d7dc46264b4c275cfc53b3cf6707c211a5.exe	96
PID 2648 wrote to memory of 5048	2648	cc405e27cf3c45f22534764ed6c2c3d7dc46264b4c275cfc53b3cf6707c211a5.exe	96
PID 2648 wrote to memory of 4252	2648	cc405e27cf3c45f22534764ed6c2c3d7dc46264b4c275cfc53b3cf6707c211a5.exe	98
PID 2648 wrote to memory of 4252	2648	cc405e27cf3c45f22534764ed6c2c3d7dc46264b4c275cfc53b3cf6707c211a5.exe	98
PID 2648 wrote to memory of 4252	2648	cc405e27cf3c45f22534764ed6c2c3d7dc46264b4c275cfc53b3cf6707c211a5.exe	98
PID 2648 wrote to memory of 3088	2648	cc405e27cf3c45f22534764ed6c2c3d7dc46264b4c275cfc53b3cf6707c211a5.exe	101
PID 2648 wrote to memory of 3088	2648	cc405e27cf3c45f22534764ed6c2c3d7dc46264b4c275cfc53b3cf6707c211a5.exe	101
PID 2648 wrote to memory of 3088	2648	cc405e27cf3c45f22534764ed6c2c3d7dc46264b4c275cfc53b3cf6707c211a5.exe	101
PID 1516 wrote to memory of 2444	1516	naorttre.exe	103
PID 1516 wrote to memory of 2444	1516	naorttre.exe	103
PID 1516 wrote to memory of 2444	1516	naorttre.exe	103
PID 1516 wrote to memory of 2444	1516	naorttre.exe	103
PID 1516 wrote to memory of 2444	1516	naorttre.exe	103

C:\Users\Admin\AppData\Local\Temp\cc405e27cf3c45f22534764ed6c2c3d7dc46264b4c275cfc53b3cf6707c211a5.exe
"C:\Users\Admin\AppData\Local\Temp\cc405e27cf3c45f22534764ed6c2c3d7dc46264b4c275cfc53b3cf6707c211a5.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2648
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\vsfflfop\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:1092
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\naorttre.exe" C:\Windows\SysWOW64\vsfflfop\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4812
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create vsfflfop binPath= "C:\Windows\SysWOW64\vsfflfop\naorttre.exe /d\"C:\Users\Admin\AppData\Local\Temp\cc405e27cf3c45f22534764ed6c2c3d7dc46264b4c275cfc53b3cf6707c211a5.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:5072
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description vsfflfop "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:5048
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start vsfflfop
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4252
- 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:3088

C:\Windows\SysWOW64\vsfflfop\naorttre.exe
C:\Windows\SysWOW64\vsfflfop\naorttre.exe /d"C:\Users\Admin\AppData\Local\Temp\cc405e27cf3c45f22534764ed6c2c3d7dc46264b4c275cfc53b3cf6707c211a5.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1516
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:2444

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\naorttre.exe

Filesize
12.3MB

MD5
a71067878dd7414fbc1205ee6226e90f

SHA1
991a273cb834b62327cd7420031bfef461fcab26

SHA256
14e7a4bef789bcc8326c247f4ee32b1f32f5024a2943b3651d52d8c7a23fd9ae

SHA512
eb300b41e89127e4a34604370d48828ea9831375dad6798616f62b7a2a488efcc07e6ee487c4bb83d36dfbf45f668da5b90a9ce64c2db049ddde0a78c84da542

Download Submit
memory/1516-19-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download
memory/1516-8-0x00000000004B0000-0x00000000004B1000-memory.dmp

Filesize
4KB

Download
memory/1516-7-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download
memory/2444-20-0x0000000000C40000-0x0000000000C55000-memory.dmp

Filesize
84KB

Download
memory/2444-13-0x0000000000C40000-0x0000000000C55000-memory.dmp

Filesize
84KB

Download
memory/2444-16-0x0000000000C40000-0x0000000000C55000-memory.dmp

Filesize
84KB

Download
memory/2444-21-0x0000000000C40000-0x0000000000C55000-memory.dmp

Filesize
84KB

Download
memory/2444-22-0x0000000000C40000-0x0000000000C55000-memory.dmp

Filesize
84KB

Download
memory/2648-2-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download
memory/2648-3-0x00000000009D0000-0x00000000009D1000-memory.dmp

Filesize
4KB

Download
memory/2648-1-0x0000000000500000-0x0000000000501000-memory.dmp

Filesize
4KB

Download
memory/2648-0-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download
memory/2648-12-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download
memory/2648-11-0x000000005F000000-0x000000005F011000-memory.dmp

Filesize
68KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads