tofsee | bda0e8f7a8383b0026382daad8c123dc726a35c07810ea8dea97b30e969a816d

General

Target

artifact.exe
Size

12.5MB
MD5

412b77d817e242ec4cf2f5e1f319d301
SHA1

e5b8e55949b33a4f85057a392c86489a7a5d3497
SHA256

bda0e8f7a8383b0026382daad8c123dc726a35c07810ea8dea97b30e969a816d
SHA512

6b92e0f2f3b951cee55ebf5625ff8579c3f92c257c7882039e38c5019ead7f84ed792d97a78fe133fbe582eb070c5ddd00fbfce430f46dd422fdde738adae244
SSDEEP

3072:3BNmmPQhjS0HB3IdC3SXgqvfzzP+rTMGU5H8AH2RRRRRRRRRRRRRRRRRRRRRRRRP:R1PQh3HB4dCCXgQfwoF

Score

10^/10

tofsee discovery evasion execution persistence privilege_escalation trojan

Malware Config

Extracted

Family

tofsee

C2

176.111.174.19

defeatwax.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
2472	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\ryayltee\ImagePath = "C:\\Windows\\SysWOW64\\ryayltee\\mnyjnsle.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-1-5-21-2412658365-3084825385-3340777666-1000\Control Panel\International\Geo\Nation	artifact.exe

Deletes itself 1 IoCs

pid	Process
208	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
212	mnyjnsle.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 212 set thread context of 208	212	mnyjnsle.exe	98

Launches sc.exe 3 IoCs

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

pid	Process
1988	sc.exe
3700	sc.exe
512	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
812	1260	WerFault.exe	81
5072	212	WerFault.exe	92

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	sc.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	mnyjnsle.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.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	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	artifact.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 1260 wrote to memory of 3808	1260	artifact.exe	82
PID 1260 wrote to memory of 3808	1260	artifact.exe	82
PID 1260 wrote to memory of 3808	1260	artifact.exe	82
PID 1260 wrote to memory of 2332	1260	artifact.exe	84
PID 1260 wrote to memory of 2332	1260	artifact.exe	84
PID 1260 wrote to memory of 2332	1260	artifact.exe	84
PID 1260 wrote to memory of 1988	1260	artifact.exe	86
PID 1260 wrote to memory of 1988	1260	artifact.exe	86
PID 1260 wrote to memory of 1988	1260	artifact.exe	86
PID 1260 wrote to memory of 3700	1260	artifact.exe	88
PID 1260 wrote to memory of 3700	1260	artifact.exe	88
PID 1260 wrote to memory of 3700	1260	artifact.exe	88
PID 1260 wrote to memory of 512	1260	artifact.exe	90
PID 1260 wrote to memory of 512	1260	artifact.exe	90
PID 1260 wrote to memory of 512	1260	artifact.exe	90
PID 1260 wrote to memory of 2472	1260	artifact.exe	93
PID 1260 wrote to memory of 2472	1260	artifact.exe	93
PID 1260 wrote to memory of 2472	1260	artifact.exe	93
PID 212 wrote to memory of 208	212	mnyjnsle.exe	98
PID 212 wrote to memory of 208	212	mnyjnsle.exe	98
PID 212 wrote to memory of 208	212	mnyjnsle.exe	98
PID 212 wrote to memory of 208	212	mnyjnsle.exe	98
PID 212 wrote to memory of 208	212	mnyjnsle.exe	98

C:\Users\Admin\AppData\Local\Temp\artifact.exe
"C:\Users\Admin\AppData\Local\Temp\artifact.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1260
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\ryayltee\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:3808
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\mnyjnsle.exe" C:\Windows\SysWOW64\ryayltee\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2332
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create ryayltee binPath= "C:\Windows\SysWOW64\ryayltee\mnyjnsle.exe /d\"C:\Users\Admin\AppData\Local\Temp\artifact.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:1988
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description ryayltee "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3700
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start ryayltee
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:512
- 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:2472
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1260 -s 1220
  2⤵
  - Program crash
  PID:812

C:\Windows\SysWOW64\ryayltee\mnyjnsle.exe
C:\Windows\SysWOW64\ryayltee\mnyjnsle.exe /d"C:\Users\Admin\AppData\Local\Temp\artifact.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:212
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:208
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 212 -s 520
  2⤵
  - Program crash
  PID:5072

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 432 -p 1260 -ip 1260
1⤵
PID:2612

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 492 -p 212 -ip 212
1⤵
PID:1960

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\mnyjnsle.exe

Filesize
12.5MB

MD5
412b77d817e242ec4cf2f5e1f319d301

SHA1
e5b8e55949b33a4f85057a392c86489a7a5d3497

SHA256
bda0e8f7a8383b0026382daad8c123dc726a35c07810ea8dea97b30e969a816d

SHA512
6b92e0f2f3b951cee55ebf5625ff8579c3f92c257c7882039e38c5019ead7f84ed792d97a78fe133fbe582eb070c5ddd00fbfce430f46dd422fdde738adae244

Download Submit
memory/208-11-0x0000000000890000-0x00000000008A5000-memory.dmp

Filesize
84KB

Download
memory/208-13-0x0000000000890000-0x00000000008A5000-memory.dmp

Filesize
84KB

Download
memory/208-14-0x0000000000890000-0x00000000008A5000-memory.dmp

Filesize
84KB

Download
memory/212-15-0x0000000000400000-0x0000000002BF4000-memory.dmp

Filesize
40.0MB

Download
memory/1260-1-0x0000000002DE0000-0x0000000002EE0000-memory.dmp

Filesize
1024KB

Download
memory/1260-2-0x0000000002D20000-0x0000000002D33000-memory.dmp

Filesize
76KB

Download
memory/1260-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/1260-10-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/1260-9-0x0000000002D20000-0x0000000002D33000-memory.dmp

Filesize
76KB

Download
memory/1260-8-0x0000000000400000-0x0000000002BF4000-memory.dmp

Filesize
40.0MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads