tofsee | c93420c70f0c8ca7fad76927b1778ff0fb81a7842d92142e7c7b758a5ca3b949

Analysis

max time kernel
144s
max time network
125s
platform
windows7_x64
resource
win7-20241023-en
resource tags

arch:x64arch:x86image:win7-20241023-enlocale:en-usos:windows7-x64system
submitted
01/02/2025, 03:27 UTC

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General

Target

2025-02-01_4b43e57843fa80f40d79329c531257dd_mafia.exe
Size

11.7MB
MD5

4b43e57843fa80f40d79329c531257dd
SHA1

2765b8a75a839da5c73b04c48343117e04c4fc83
SHA256

c93420c70f0c8ca7fad76927b1778ff0fb81a7842d92142e7c7b758a5ca3b949
SHA512

6bc7f735ed9d19c39369c9565b7b2c398fc6e6e24dcf986c7591bcbe755fe9fd380a869af664c41419cead83e63dbf2637beebc855b606594adeac43e4553346
SSDEEP

49152:0qE0YKr3fYPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPz:0qtYc3c

Score

10^/10

tofsee defense_evasion discovery execution persistence privilege_escalation trojan

Malware Config

Extracted

Family

tofsee

43.231.4.7

lazystax.ru

Signatures

Tofsee
Backdoor/botnet which carries out malicious activities based on commands from a C2 server.
trojan tofsee
Tofsee family
tofsee

Windows security bypass 2 TTPs 1 IoCs

defense_evasion trojan

Disable or Modify Tools

T1562.001

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths\C:\Windows\SysWOW64\ylsanvfu = "0"	svchost.exe

Creates new service(s) 2 TTPs
persistence execution

Windows Service
T1543.003

Service Execution
T1569.002

Modifies Windows Firewall 2 TTPs 1 IoCs

defense_evasion

Windows Service

T1543.003

Disable or Modify System Firewall

T1562.004

pid	Process
2796	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\ylsanvfu\ImagePath = "C:\\Windows\\SysWOW64\\ylsanvfu\\vxsyreo.exe"	svchost.exe

Deletes itself 1 IoCs

pid	Process
2916	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2808	vxsyreo.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2808 set thread context of 2916	2808	vxsyreo.exe	41

Launches sc.exe 3 IoCs

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

pid	Process
2404	sc.exe
2300	sc.exe
2548	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

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	vxsyreo.exe
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	sc.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	2025-02-01_4b43e57843fa80f40d79329c531257dd_mafia.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 30 IoCs

description	pid	Process	procid_target
PID 1584 wrote to memory of 2604	1584	2025-02-01_4b43e57843fa80f40d79329c531257dd_mafia.exe	30
PID 1584 wrote to memory of 2604	1584	2025-02-01_4b43e57843fa80f40d79329c531257dd_mafia.exe	30
PID 1584 wrote to memory of 2604	1584	2025-02-01_4b43e57843fa80f40d79329c531257dd_mafia.exe	30
PID 1584 wrote to memory of 2604	1584	2025-02-01_4b43e57843fa80f40d79329c531257dd_mafia.exe	30
PID 1584 wrote to memory of 1696	1584	2025-02-01_4b43e57843fa80f40d79329c531257dd_mafia.exe	32
PID 1584 wrote to memory of 1696	1584	2025-02-01_4b43e57843fa80f40d79329c531257dd_mafia.exe	32
PID 1584 wrote to memory of 1696	1584	2025-02-01_4b43e57843fa80f40d79329c531257dd_mafia.exe	32
PID 1584 wrote to memory of 1696	1584	2025-02-01_4b43e57843fa80f40d79329c531257dd_mafia.exe	32
PID 1584 wrote to memory of 2404	1584	2025-02-01_4b43e57843fa80f40d79329c531257dd_mafia.exe	34
PID 1584 wrote to memory of 2404	1584	2025-02-01_4b43e57843fa80f40d79329c531257dd_mafia.exe	34
PID 1584 wrote to memory of 2404	1584	2025-02-01_4b43e57843fa80f40d79329c531257dd_mafia.exe	34
PID 1584 wrote to memory of 2404	1584	2025-02-01_4b43e57843fa80f40d79329c531257dd_mafia.exe	34
PID 1584 wrote to memory of 2300	1584	2025-02-01_4b43e57843fa80f40d79329c531257dd_mafia.exe	36
PID 1584 wrote to memory of 2300	1584	2025-02-01_4b43e57843fa80f40d79329c531257dd_mafia.exe	36
PID 1584 wrote to memory of 2300	1584	2025-02-01_4b43e57843fa80f40d79329c531257dd_mafia.exe	36
PID 1584 wrote to memory of 2300	1584	2025-02-01_4b43e57843fa80f40d79329c531257dd_mafia.exe	36
PID 1584 wrote to memory of 2548	1584	2025-02-01_4b43e57843fa80f40d79329c531257dd_mafia.exe	38
PID 1584 wrote to memory of 2548	1584	2025-02-01_4b43e57843fa80f40d79329c531257dd_mafia.exe	38
PID 1584 wrote to memory of 2548	1584	2025-02-01_4b43e57843fa80f40d79329c531257dd_mafia.exe	38
PID 1584 wrote to memory of 2548	1584	2025-02-01_4b43e57843fa80f40d79329c531257dd_mafia.exe	38
PID 2808 wrote to memory of 2916	2808	vxsyreo.exe	41
PID 2808 wrote to memory of 2916	2808	vxsyreo.exe	41
PID 2808 wrote to memory of 2916	2808	vxsyreo.exe	41
PID 2808 wrote to memory of 2916	2808	vxsyreo.exe	41
PID 2808 wrote to memory of 2916	2808	vxsyreo.exe	41
PID 2808 wrote to memory of 2916	2808	vxsyreo.exe	41
PID 1584 wrote to memory of 2796	1584	2025-02-01_4b43e57843fa80f40d79329c531257dd_mafia.exe	42
PID 1584 wrote to memory of 2796	1584	2025-02-01_4b43e57843fa80f40d79329c531257dd_mafia.exe	42
PID 1584 wrote to memory of 2796	1584	2025-02-01_4b43e57843fa80f40d79329c531257dd_mafia.exe	42
PID 1584 wrote to memory of 2796	1584	2025-02-01_4b43e57843fa80f40d79329c531257dd_mafia.exe	42

C:\Users\Admin\AppData\Local\Temp\2025-02-01_4b43e57843fa80f40d79329c531257dd_mafia.exe
"C:\Users\Admin\AppData\Local\Temp\2025-02-01_4b43e57843fa80f40d79329c531257dd_mafia.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1584
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\ylsanvfu\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2604
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\vxsyreo.exe" C:\Windows\SysWOW64\ylsanvfu\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:1696
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create ylsanvfu binPath= "C:\Windows\SysWOW64\ylsanvfu\vxsyreo.exe /d\"C:\Users\Admin\AppData\Local\Temp\2025-02-01_4b43e57843fa80f40d79329c531257dd_mafia.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2404
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description ylsanvfu "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2300
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start ylsanvfu
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2548
- 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:2796

C:\Windows\SysWOW64\ylsanvfu\vxsyreo.exe
C:\Windows\SysWOW64\ylsanvfu\vxsyreo.exe /d"C:\Users\Admin\AppData\Local\Temp\2025-02-01_4b43e57843fa80f40d79329c531257dd_mafia.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2808
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Windows security bypass
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:2916

Network

DNS

microsoft.com

svchost.exe

Remote address:

8.8.8.8:53

Request

microsoft.com

IN A

Response

microsoft.com

IN A

20.231.239.246

microsoft.com

IN A

20.70.246.20

microsoft.com

IN A

20.236.44.162

microsoft.com

IN A

20.112.250.133

microsoft.com

IN A

20.76.201.171
DNS

microsoft.com

svchost.exe

Remote address:

8.8.8.8:53

Request

microsoft.com

IN MX

Response

microsoft.com

IN MX

microsoft-commail protectionoutlook�
DNS

microsoft-com.mail.protection.outlook.com

svchost.exe

Remote address:

8.8.8.8:53

Request

microsoft-com.mail.protection.outlook.com

IN A

Response

microsoft-com.mail.protection.outlook.com

IN A

52.101.42.0

microsoft-com.mail.protection.outlook.com

IN A

52.101.40.26

microsoft-com.mail.protection.outlook.com

IN A

52.101.8.49

microsoft-com.mail.protection.outlook.com

IN A

52.101.11.0
DNS

yahoo.com

svchost.exe

Remote address:

8.8.8.8:53

Request

yahoo.com

IN MX

Response

yahoo.com

IN MX

mta6am0yahoodnsnet

yahoo.com

IN MX

mta5�.

yahoo.com

IN MX

mta7�.
DNS

mta6.am0.yahoodns.net

svchost.exe

Remote address:

8.8.8.8:53

Request

mta6.am0.yahoodns.net

IN A

Response

mta6.am0.yahoodns.net

IN A

98.136.96.91

mta6.am0.yahoodns.net

IN A

67.195.204.73

mta6.am0.yahoodns.net

IN A

67.195.204.79

mta6.am0.yahoodns.net

IN A

98.136.96.77

mta6.am0.yahoodns.net

IN A

98.136.96.74

mta6.am0.yahoodns.net

IN A

67.195.204.74

mta6.am0.yahoodns.net

IN A

67.195.228.109

mta6.am0.yahoodns.net

IN A

67.195.204.77
DNS

google.com

svchost.exe

Remote address:

8.8.8.8:53

Request

google.com

IN MX

Response

google.com

IN MX

smtp�
DNS

smtp.google.com

svchost.exe

Remote address:

8.8.8.8:53

Request

smtp.google.com

IN A

Response

smtp.google.com

IN A

74.125.133.27

smtp.google.com

IN A

64.233.166.26

smtp.google.com

IN A

74.125.71.26

smtp.google.com

IN A

74.125.71.27

smtp.google.com

IN A

64.233.166.27
DNS

mail.ru

svchost.exe

Remote address:

8.8.8.8:53

Request

mail.ru

IN MX

Response

mail.ru

IN MX

mxs�
DNS

mxs.mail.ru

svchost.exe

Remote address:

8.8.8.8:53

Request

mxs.mail.ru

IN A

Response

mxs.mail.ru

IN A

94.100.180.31

mxs.mail.ru

IN A

217.69.139.150

20.231.239.246:80

microsoft.com

svchost.exe

190 B
92 B
4
2
52.101.42.0:25

microsoft-com.mail.protection.outlook.com

svchost.exe

152 B
3
43.231.4.7:443

svchost.exe

152 B
3
98.136.96.91:25

mta6.am0.yahoodns.net

svchost.exe

152 B
3
74.125.133.27:25

smtp.google.com

svchost.exe

152 B
3
43.231.4.7:443

svchost.exe

152 B
3
94.100.180.31:25

mxs.mail.ru

svchost.exe

152 B
3
43.231.4.7:443

svchost.exe

152 B
3

8.8.8.8:53

microsoft.com

dns

svchost.exe

59 B
139 B
1
1

DNS Request

microsoft.com

DNS Response

20.231.239.246

20.70.246.20

20.236.44.162

20.112.250.133

20.76.201.171
8.8.8.8:53

microsoft.com

dns

svchost.exe

59 B
113 B
1
1

DNS Request

microsoft.com
8.8.8.8:53

microsoft-com.mail.protection.outlook.com

dns

svchost.exe

87 B
151 B
1
1

DNS Request

microsoft-com.mail.protection.outlook.com

DNS Response

52.101.42.0

52.101.40.26

52.101.8.49

52.101.11.0
8.8.8.8:53

yahoo.com

dns

svchost.exe

55 B
134 B
1
1

DNS Request

yahoo.com
8.8.8.8:53

mta6.am0.yahoodns.net

dns

svchost.exe

67 B
195 B
1
1

DNS Request

mta6.am0.yahoodns.net

DNS Response

98.136.96.91

67.195.204.73

67.195.204.79

98.136.96.77

98.136.96.74

67.195.204.74

67.195.228.109

67.195.204.77
8.8.8.8:53

google.com

dns

svchost.exe

56 B
77 B
1
1

DNS Request

google.com
8.8.8.8:53

smtp.google.com

dns

svchost.exe

61 B
141 B
1
1

DNS Request

smtp.google.com

DNS Response

74.125.133.27

64.233.166.26

74.125.71.26

74.125.71.27

64.233.166.27
8.8.8.8:53

mail.ru

dns

svchost.exe

53 B
73 B
1
1

DNS Request

mail.ru
8.8.8.8:53

mxs.mail.ru

dns

svchost.exe

57 B
89 B
1
1

DNS Request

mxs.mail.ru

DNS Response

94.100.180.31

217.69.139.150

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

System Services

T1569

Service Execution

T1569.002

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Create or Modify System Process

T1543

Windows Service

T1543.003

Event Triggered Execution

T1546

Netsh Helper DLL

T1546.007

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Create or Modify System Process

T1543

Windows Service

T1543.003

Event Triggered Execution

T1546

Netsh Helper DLL

T1546.007

Defense Evasion

Impair Defenses

T1562

Disable or Modify System Firewall

T1562.004

Disable or Modify Tools

T1562.001

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

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

Filesize
11.3MB

MD5
7e811bc48a3afad994b009290155bd03

SHA1
d24e61a923e21d81f8e555ac0d7b3d7341177609

SHA256
3d2272265667eadf95c4998225f5ace4d9ef3afc0994de38319ac123c672a9df

SHA512
416378350a3546622bbc8b88095845016f58abe386c0a5288a8120ee938b96ea8353f488ea11f037e1f9ddde51fd795820a9835730bef66ff4ceee1d152b7d18

Download Submit
memory/1584-16-0x0000000002F70000-0x0000000003070000-memory.dmp

Filesize
1024KB

Download
memory/1584-2-0x0000000000220000-0x0000000000233000-memory.dmp

Filesize
76KB

Download
memory/1584-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/1584-15-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/1584-17-0x0000000000220000-0x0000000000233000-memory.dmp

Filesize
76KB

Download
memory/1584-1-0x0000000002F70000-0x0000000003070000-memory.dmp

Filesize
1024KB

Download
memory/1584-14-0x0000000000400000-0x0000000002DC3000-memory.dmp

Filesize
41.8MB

Download
memory/2808-13-0x0000000000400000-0x0000000002DC3000-memory.dmp

Filesize
41.8MB

Download
memory/2916-10-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2916-8-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download
memory/2916-11-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download
memory/2916-18-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download
memory/2916-19-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

DNS Request

DNS Response

DNS Request

DNS Request

DNS Response

DNS Request

DNS Request

DNS Response

DNS Request

DNS Request

DNS Response

DNS Request

DNS Request

DNS Response

MITRE ATT&CK Enterprise v15

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