tofsee | ff21828fb3915046a904aca7876e98a8f994b2fcbf872d0eee15b0f025380201

General

Target

ff21828fb3915046a904aca7876e98a8f994b2fcbf872d0eee15b0f025380201.exe
Size

355KB
MD5

1d5d4b18e2f0f03c8de6d08390dc192c
SHA1

f76fe6a8dd3a26d51a94c7a44e93f549bd182518
SHA256

ff21828fb3915046a904aca7876e98a8f994b2fcbf872d0eee15b0f025380201
SHA512

e0a12427841f8c2f4f3655f0a42a210d5ae79bdb51d4a351315a800653b786ce2257600da7f3e2a592c65146594e06fa9cee68ff9dd62a991fa909f1fee4313d
SSDEEP

6144:hvo5HY2USvj5R/i2gCiX0oH1VmyerYDn1QqaFZczX3V5wRjejHH5TAb5:hA5HY2USr5R/i2gCy0oVVmyerK1/aFZ7

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
2148	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\hyvftgrx\ImagePath = "C:\\Windows\\SysWOW64\\hyvftgrx\\vlgsmycu.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	ff21828fb3915046a904aca7876e98a8f994b2fcbf872d0eee15b0f025380201.exe

Deletes itself 1 IoCs

pid	Process
4128	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
3644	vlgsmycu.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3644 set thread context of 4128	3644	vlgsmycu.exe	98

Launches sc.exe 3 IoCs

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

pid	Process
1968	sc.exe
1400	sc.exe
3680	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

Program crash 2 IoCs

pid	pid_target	Process	procid_target
1632	5048	WerFault.exe	81
5024	3644	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	netsh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	ff21828fb3915046a904aca7876e98a8f994b2fcbf872d0eee15b0f025380201.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	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	vlgsmycu.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 5048 wrote to memory of 4772	5048	ff21828fb3915046a904aca7876e98a8f994b2fcbf872d0eee15b0f025380201.exe	82
PID 5048 wrote to memory of 4772	5048	ff21828fb3915046a904aca7876e98a8f994b2fcbf872d0eee15b0f025380201.exe	82
PID 5048 wrote to memory of 4772	5048	ff21828fb3915046a904aca7876e98a8f994b2fcbf872d0eee15b0f025380201.exe	82
PID 5048 wrote to memory of 5096	5048	ff21828fb3915046a904aca7876e98a8f994b2fcbf872d0eee15b0f025380201.exe	84
PID 5048 wrote to memory of 5096	5048	ff21828fb3915046a904aca7876e98a8f994b2fcbf872d0eee15b0f025380201.exe	84
PID 5048 wrote to memory of 5096	5048	ff21828fb3915046a904aca7876e98a8f994b2fcbf872d0eee15b0f025380201.exe	84
PID 5048 wrote to memory of 1968	5048	ff21828fb3915046a904aca7876e98a8f994b2fcbf872d0eee15b0f025380201.exe	86
PID 5048 wrote to memory of 1968	5048	ff21828fb3915046a904aca7876e98a8f994b2fcbf872d0eee15b0f025380201.exe	86
PID 5048 wrote to memory of 1968	5048	ff21828fb3915046a904aca7876e98a8f994b2fcbf872d0eee15b0f025380201.exe	86
PID 5048 wrote to memory of 1400	5048	ff21828fb3915046a904aca7876e98a8f994b2fcbf872d0eee15b0f025380201.exe	88
PID 5048 wrote to memory of 1400	5048	ff21828fb3915046a904aca7876e98a8f994b2fcbf872d0eee15b0f025380201.exe	88
PID 5048 wrote to memory of 1400	5048	ff21828fb3915046a904aca7876e98a8f994b2fcbf872d0eee15b0f025380201.exe	88
PID 5048 wrote to memory of 3680	5048	ff21828fb3915046a904aca7876e98a8f994b2fcbf872d0eee15b0f025380201.exe	90
PID 5048 wrote to memory of 3680	5048	ff21828fb3915046a904aca7876e98a8f994b2fcbf872d0eee15b0f025380201.exe	90
PID 5048 wrote to memory of 3680	5048	ff21828fb3915046a904aca7876e98a8f994b2fcbf872d0eee15b0f025380201.exe	90
PID 5048 wrote to memory of 2148	5048	ff21828fb3915046a904aca7876e98a8f994b2fcbf872d0eee15b0f025380201.exe	93
PID 5048 wrote to memory of 2148	5048	ff21828fb3915046a904aca7876e98a8f994b2fcbf872d0eee15b0f025380201.exe	93
PID 5048 wrote to memory of 2148	5048	ff21828fb3915046a904aca7876e98a8f994b2fcbf872d0eee15b0f025380201.exe	93
PID 3644 wrote to memory of 4128	3644	vlgsmycu.exe	98
PID 3644 wrote to memory of 4128	3644	vlgsmycu.exe	98
PID 3644 wrote to memory of 4128	3644	vlgsmycu.exe	98
PID 3644 wrote to memory of 4128	3644	vlgsmycu.exe	98
PID 3644 wrote to memory of 4128	3644	vlgsmycu.exe	98

C:\Users\Admin\AppData\Local\Temp\ff21828fb3915046a904aca7876e98a8f994b2fcbf872d0eee15b0f025380201.exe
"C:\Users\Admin\AppData\Local\Temp\ff21828fb3915046a904aca7876e98a8f994b2fcbf872d0eee15b0f025380201.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:5048
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\hyvftgrx\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4772
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\vlgsmycu.exe" C:\Windows\SysWOW64\hyvftgrx\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:5096
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create hyvftgrx binPath= "C:\Windows\SysWOW64\hyvftgrx\vlgsmycu.exe /d\"C:\Users\Admin\AppData\Local\Temp\ff21828fb3915046a904aca7876e98a8f994b2fcbf872d0eee15b0f025380201.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:1968
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description hyvftgrx "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:1400
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start hyvftgrx
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3680
- 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:2148
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 5048 -s 664
  2⤵
  - Program crash
  PID:1632

C:\Windows\SysWOW64\hyvftgrx\vlgsmycu.exe
C:\Windows\SysWOW64\hyvftgrx\vlgsmycu.exe /d"C:\Users\Admin\AppData\Local\Temp\ff21828fb3915046a904aca7876e98a8f994b2fcbf872d0eee15b0f025380201.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3644
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:4128
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3644 -s 512
  2⤵
  - Program crash
  PID:5024

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 5048 -ip 5048
1⤵
PID:2388

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 448 -p 3644 -ip 3644
1⤵
PID:220

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\vlgsmycu.exe

Filesize
13.6MB

MD5
3e31423434a8c33a9a175ea492d53fb7

SHA1
50d6e727bea27558ca73ed7d610f7d33e26e2699

SHA256
75dc8e1872256061b9e1595f26e7a499f105560e8b7b7ce365183f6e5bb1f2b6

SHA512
bf7757073569b907d51ac8776c27c95be992a5068fc5eaf34eb2329cb3f5e756be0cc524a9c11dd299166f06389998f9fa092e401ccdbf5a15117f824a74fa0b

Download Submit
memory/3644-14-0x0000000000400000-0x00000000016CE000-memory.dmp

Filesize
18.8MB

Download
memory/3644-17-0x0000000000400000-0x00000000016CE000-memory.dmp

Filesize
18.8MB

Download
memory/4128-11-0x0000000001060000-0x0000000001075000-memory.dmp

Filesize
84KB

Download
memory/4128-13-0x0000000001060000-0x0000000001075000-memory.dmp

Filesize
84KB

Download
memory/4128-15-0x0000000001060000-0x0000000001075000-memory.dmp

Filesize
84KB

Download
memory/5048-1-0x00000000016D0000-0x00000000017D0000-memory.dmp

Filesize
1024KB

Download
memory/5048-2-0x0000000003410000-0x0000000003423000-memory.dmp

Filesize
76KB

Download
memory/5048-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/5048-10-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/5048-9-0x0000000003410000-0x0000000003423000-memory.dmp

Filesize
76KB

Download
memory/5048-8-0x0000000000400000-0x00000000016CE000-memory.dmp

Filesize
18.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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