tofsee | 3e5a7d45e7f5f0c1b5522e6d387d5b6f5dd53ba4c4bf7864b428bdcb8e3bba07

Analysis

max time kernel
144s
max time network
120s
platform
windows7_x64
resource
win7-20241010-en
resource tags

arch:x64arch:x86image:win7-20241010-enlocale:en-usos:windows7-x64system
submitted
30-01-2025 18:55

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General

Target

2025-01-30_e3d8c336ab898de229a8409743a5c707_mafia.exe
Size

10.7MB
MD5

e3d8c336ab898de229a8409743a5c707
SHA1

812278f9a8f70c264bf4c12149fb18881cb9b508
SHA256

3e5a7d45e7f5f0c1b5522e6d387d5b6f5dd53ba4c4bf7864b428bdcb8e3bba07
SHA512

3ced12ff027f30c38f1770abe40fac0429c79443647e312554e24c20d4709229b2d50809d8601377f21143344bf4927709965ae8bd120d580a065eacb6c523d9
SSDEEP

3072:nLBgXOXcdW8tar7vGdq8c7YMl2b8anmMXnb58XuDP9het3Zv1oSW1za2E+w5C2/0:+OMdRQr7OB0ypmMXnl8XEPM3noSWOCJ

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\erycvnvv = "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\erycvnvv\ImagePath = "C:\\Windows\\SysWOW64\\erycvnvv\\vvwhcdbj.exe"	svchost.exe

Deletes itself 1 IoCs

pid	Process
2684	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2448	vvwhcdbj.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2448 set thread context of 2684	2448	vvwhcdbj.exe	44

Launches sc.exe 3 IoCs

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

pid	Process
2916	sc.exe
2932	sc.exe
2720	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	svchost.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	vvwhcdbj.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	2025-01-30_e3d8c336ab898de229a8409743a5c707_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 1056 wrote to memory of 2876	1056	2025-01-30_e3d8c336ab898de229a8409743a5c707_mafia.exe	31
PID 1056 wrote to memory of 2876	1056	2025-01-30_e3d8c336ab898de229a8409743a5c707_mafia.exe	31
PID 1056 wrote to memory of 2876	1056	2025-01-30_e3d8c336ab898de229a8409743a5c707_mafia.exe	31
PID 1056 wrote to memory of 2876	1056	2025-01-30_e3d8c336ab898de229a8409743a5c707_mafia.exe	31
PID 1056 wrote to memory of 2124	1056	2025-01-30_e3d8c336ab898de229a8409743a5c707_mafia.exe	33
PID 1056 wrote to memory of 2124	1056	2025-01-30_e3d8c336ab898de229a8409743a5c707_mafia.exe	33
PID 1056 wrote to memory of 2124	1056	2025-01-30_e3d8c336ab898de229a8409743a5c707_mafia.exe	33
PID 1056 wrote to memory of 2124	1056	2025-01-30_e3d8c336ab898de229a8409743a5c707_mafia.exe	33
PID 1056 wrote to memory of 2916	1056	2025-01-30_e3d8c336ab898de229a8409743a5c707_mafia.exe	35
PID 1056 wrote to memory of 2916	1056	2025-01-30_e3d8c336ab898de229a8409743a5c707_mafia.exe	35
PID 1056 wrote to memory of 2916	1056	2025-01-30_e3d8c336ab898de229a8409743a5c707_mafia.exe	35
PID 1056 wrote to memory of 2916	1056	2025-01-30_e3d8c336ab898de229a8409743a5c707_mafia.exe	35
PID 1056 wrote to memory of 2932	1056	2025-01-30_e3d8c336ab898de229a8409743a5c707_mafia.exe	37
PID 1056 wrote to memory of 2932	1056	2025-01-30_e3d8c336ab898de229a8409743a5c707_mafia.exe	37
PID 1056 wrote to memory of 2932	1056	2025-01-30_e3d8c336ab898de229a8409743a5c707_mafia.exe	37
PID 1056 wrote to memory of 2932	1056	2025-01-30_e3d8c336ab898de229a8409743a5c707_mafia.exe	37
PID 1056 wrote to memory of 2720	1056	2025-01-30_e3d8c336ab898de229a8409743a5c707_mafia.exe	39
PID 1056 wrote to memory of 2720	1056	2025-01-30_e3d8c336ab898de229a8409743a5c707_mafia.exe	39
PID 1056 wrote to memory of 2720	1056	2025-01-30_e3d8c336ab898de229a8409743a5c707_mafia.exe	39
PID 1056 wrote to memory of 2720	1056	2025-01-30_e3d8c336ab898de229a8409743a5c707_mafia.exe	39
PID 1056 wrote to memory of 2796	1056	2025-01-30_e3d8c336ab898de229a8409743a5c707_mafia.exe	42
PID 1056 wrote to memory of 2796	1056	2025-01-30_e3d8c336ab898de229a8409743a5c707_mafia.exe	42
PID 1056 wrote to memory of 2796	1056	2025-01-30_e3d8c336ab898de229a8409743a5c707_mafia.exe	42
PID 1056 wrote to memory of 2796	1056	2025-01-30_e3d8c336ab898de229a8409743a5c707_mafia.exe	42
PID 2448 wrote to memory of 2684	2448	vvwhcdbj.exe	44
PID 2448 wrote to memory of 2684	2448	vvwhcdbj.exe	44
PID 2448 wrote to memory of 2684	2448	vvwhcdbj.exe	44
PID 2448 wrote to memory of 2684	2448	vvwhcdbj.exe	44
PID 2448 wrote to memory of 2684	2448	vvwhcdbj.exe	44
PID 2448 wrote to memory of 2684	2448	vvwhcdbj.exe	44

C:\Users\Admin\AppData\Local\Temp\2025-01-30_e3d8c336ab898de229a8409743a5c707_mafia.exe
"C:\Users\Admin\AppData\Local\Temp\2025-01-30_e3d8c336ab898de229a8409743a5c707_mafia.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1056
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\erycvnvv\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2876
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\vvwhcdbj.exe" C:\Windows\SysWOW64\erycvnvv\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2124
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create erycvnvv binPath= "C:\Windows\SysWOW64\erycvnvv\vvwhcdbj.exe /d\"C:\Users\Admin\AppData\Local\Temp\2025-01-30_e3d8c336ab898de229a8409743a5c707_mafia.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2916
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description erycvnvv "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2932
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start erycvnvv
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2720
- 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\erycvnvv\vvwhcdbj.exe
C:\Windows\SysWOW64\erycvnvv\vvwhcdbj.exe /d"C:\Users\Admin\AppData\Local\Temp\2025-01-30_e3d8c336ab898de229a8409743a5c707_mafia.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2448
- 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:2684

Network

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\vvwhcdbj.exe

Filesize
13.4MB

MD5
bf9e3969461987ba751e1cd8104054c8

SHA1
92f1e691dd55e2486cfebc15507a40b56f407e03

SHA256
93cf22f3798685c367dee4bbf73edb52473d1e19571d9e0fda7012f169782311

SHA512
21495707d2ff7dec300d69ff4f7149306f209252e04ae1bb04dc433d8586c4fcfd7bc564cc770f72ac92c931b1ba92a30cf5c9d13546a2fb65a0b616a66ebdf3

Download Submit
memory/1056-7-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/1056-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/1056-1-0x00000000002D0000-0x00000000003D0000-memory.dmp

Filesize
1024KB

Download
memory/1056-9-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/1056-8-0x0000000000020000-0x0000000000033000-memory.dmp

Filesize
76KB

Download
memory/1056-2-0x0000000000020000-0x0000000000033000-memory.dmp

Filesize
76KB

Download
memory/2448-16-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/2684-14-0x0000000000090000-0x00000000000A5000-memory.dmp

Filesize
84KB

Download
memory/2684-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2684-11-0x0000000000090000-0x00000000000A5000-memory.dmp

Filesize
84KB

Download
memory/2684-17-0x0000000000090000-0x00000000000A5000-memory.dmp

Filesize
84KB

Download
memory/2684-18-0x0000000000090000-0x00000000000A5000-memory.dmp

Filesize
84KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads