tofsee | 7e9dcf4dbc0fc5a0196b7cac80ade6dc1965ff0404e41cd4754c7ad98f723ba4

General

Target

b49a0f70c825b7b3dec72b1205df3f32112e226003b365ce0e027e0c5a6600c4.exe
Size

12.2MB
MD5

73611efc149014c994fedbdebd25fb36
SHA1

3b13c6f2fa9dbc51c546570e51bf3ba912b71d9f
SHA256

b49a0f70c825b7b3dec72b1205df3f32112e226003b365ce0e027e0c5a6600c4
SHA512

18229c238aea6e1c4f4cf17fbb4c3840508a4bbec80fa8b55b11157f8737a13c55cb6c70038559d809027870bdfdce69d795d4832a41e78d988077597bd07316
SSDEEP

98304:j66666666666666666666666666666666666666666666666666666666666666q:

Score

10^/10

tofsee discovery evasion execution persistence privilege_escalation trojan

Malware Config

Extracted

Family

tofsee

C2

defeatwax.ru

refabyd.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
2356	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\mmnalxxc\ImagePath = "C:\\Windows\\SysWOW64\\mmnalxxc\\qvrjhkw.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-1-5-21-3756129449-3121373848-4276368241-1000\Control Panel\International\Geo\Nation	b49a0f70c825b7b3dec72b1205df3f32112e226003b365ce0e027e0c5a6600c4.exe

Deletes itself 1 IoCs

pid	Process
4492	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
4052	qvrjhkw.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4052 set thread context of 4492	4052	qvrjhkw.exe	95

Launches sc.exe 3 IoCs

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

pid	Process
3056	sc.exe
2872	sc.exe
1576	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
1456	4052	WerFault.exe	94
4696	3616	WerFault.exe	83

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	qvrjhkw.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	netsh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	b49a0f70c825b7b3dec72b1205df3f32112e226003b365ce0e027e0c5a6600c4.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 3616 wrote to memory of 2224	3616	b49a0f70c825b7b3dec72b1205df3f32112e226003b365ce0e027e0c5a6600c4.exe	84
PID 3616 wrote to memory of 2224	3616	b49a0f70c825b7b3dec72b1205df3f32112e226003b365ce0e027e0c5a6600c4.exe	84
PID 3616 wrote to memory of 2224	3616	b49a0f70c825b7b3dec72b1205df3f32112e226003b365ce0e027e0c5a6600c4.exe	84
PID 3616 wrote to memory of 1700	3616	b49a0f70c825b7b3dec72b1205df3f32112e226003b365ce0e027e0c5a6600c4.exe	86
PID 3616 wrote to memory of 1700	3616	b49a0f70c825b7b3dec72b1205df3f32112e226003b365ce0e027e0c5a6600c4.exe	86
PID 3616 wrote to memory of 1700	3616	b49a0f70c825b7b3dec72b1205df3f32112e226003b365ce0e027e0c5a6600c4.exe	86
PID 3616 wrote to memory of 3056	3616	b49a0f70c825b7b3dec72b1205df3f32112e226003b365ce0e027e0c5a6600c4.exe	88
PID 3616 wrote to memory of 3056	3616	b49a0f70c825b7b3dec72b1205df3f32112e226003b365ce0e027e0c5a6600c4.exe	88
PID 3616 wrote to memory of 3056	3616	b49a0f70c825b7b3dec72b1205df3f32112e226003b365ce0e027e0c5a6600c4.exe	88
PID 3616 wrote to memory of 2872	3616	b49a0f70c825b7b3dec72b1205df3f32112e226003b365ce0e027e0c5a6600c4.exe	90
PID 3616 wrote to memory of 2872	3616	b49a0f70c825b7b3dec72b1205df3f32112e226003b365ce0e027e0c5a6600c4.exe	90
PID 3616 wrote to memory of 2872	3616	b49a0f70c825b7b3dec72b1205df3f32112e226003b365ce0e027e0c5a6600c4.exe	90
PID 3616 wrote to memory of 1576	3616	b49a0f70c825b7b3dec72b1205df3f32112e226003b365ce0e027e0c5a6600c4.exe	92
PID 3616 wrote to memory of 1576	3616	b49a0f70c825b7b3dec72b1205df3f32112e226003b365ce0e027e0c5a6600c4.exe	92
PID 3616 wrote to memory of 1576	3616	b49a0f70c825b7b3dec72b1205df3f32112e226003b365ce0e027e0c5a6600c4.exe	92
PID 4052 wrote to memory of 4492	4052	qvrjhkw.exe	95
PID 4052 wrote to memory of 4492	4052	qvrjhkw.exe	95
PID 4052 wrote to memory of 4492	4052	qvrjhkw.exe	95
PID 3616 wrote to memory of 2356	3616	b49a0f70c825b7b3dec72b1205df3f32112e226003b365ce0e027e0c5a6600c4.exe	96
PID 3616 wrote to memory of 2356	3616	b49a0f70c825b7b3dec72b1205df3f32112e226003b365ce0e027e0c5a6600c4.exe	96
PID 3616 wrote to memory of 2356	3616	b49a0f70c825b7b3dec72b1205df3f32112e226003b365ce0e027e0c5a6600c4.exe	96
PID 4052 wrote to memory of 4492	4052	qvrjhkw.exe	95
PID 4052 wrote to memory of 4492	4052	qvrjhkw.exe	95

C:\Users\Admin\AppData\Local\Temp\b49a0f70c825b7b3dec72b1205df3f32112e226003b365ce0e027e0c5a6600c4.exe
"C:\Users\Admin\AppData\Local\Temp\b49a0f70c825b7b3dec72b1205df3f32112e226003b365ce0e027e0c5a6600c4.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3616
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\mmnalxxc\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2224
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\qvrjhkw.exe" C:\Windows\SysWOW64\mmnalxxc\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:1700
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create mmnalxxc binPath= "C:\Windows\SysWOW64\mmnalxxc\qvrjhkw.exe /d\"C:\Users\Admin\AppData\Local\Temp\b49a0f70c825b7b3dec72b1205df3f32112e226003b365ce0e027e0c5a6600c4.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3056
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description mmnalxxc "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2872
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start mmnalxxc
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:1576
- 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:2356
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3616 -s 1044
  2⤵
  - Program crash
  PID:4696

C:\Windows\SysWOW64\mmnalxxc\qvrjhkw.exe
C:\Windows\SysWOW64\mmnalxxc\qvrjhkw.exe /d"C:\Users\Admin\AppData\Local\Temp\b49a0f70c825b7b3dec72b1205df3f32112e226003b365ce0e027e0c5a6600c4.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4052
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:4492
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4052 -s 516
  2⤵
  - Program crash
  PID:1456

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 468 -p 4052 -ip 4052
1⤵
PID:4512

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 500 -p 3616 -ip 3616
1⤵
PID:3168

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\qvrjhkw.exe

Filesize
13.3MB

MD5
e5f814ea3f2e3c630a171bac14faa0ec

SHA1
454d7be3550c8041bc38b26835bec40895320029

SHA256
5e322461a842fdc1a1c33642c35dd5fa53024f8fe6e9e8f66ca30304336e1cac

SHA512
22fcc0108bcfc0347af65b12854d7ee3ca4a09d3a894e0dc5fe7a386920c2d810c0d18cb29ef350cc1dc52d8420d7e66d8a0d0eb95c6aefef6dde65d484d1494

Download Submit
memory/3616-1-0x0000000002B90000-0x0000000002C90000-memory.dmp

Filesize
1024KB

Download
memory/3616-2-0x0000000002B70000-0x0000000002B83000-memory.dmp

Filesize
76KB

Download
memory/3616-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/3616-13-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/3616-12-0x0000000002B70000-0x0000000002B83000-memory.dmp

Filesize
76KB

Download
memory/3616-11-0x0000000000400000-0x0000000002B52000-memory.dmp

Filesize
39.3MB

Download
memory/4052-10-0x0000000000400000-0x0000000002B52000-memory.dmp

Filesize
39.3MB

Download
memory/4492-8-0x00000000004A0000-0x00000000004B5000-memory.dmp

Filesize
84KB

Download
memory/4492-14-0x00000000004A0000-0x00000000004B5000-memory.dmp

Filesize
84KB

Download
memory/4492-15-0x00000000004A0000-0x00000000004B5000-memory.dmp

Filesize
84KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads