tofsee | b513bc873cb6846cd3957141af65e5f9a30d673fcc2d4ab7ef09938cdf5bc81d

Analysis

max time kernel
144s
max time network
121s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
11-01-2025 16:37

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General

Target

2025-01-11_cf1854207054c0fc2d20cc74a9eb818f_mafia.exe
Size

10.6MB
MD5

cf1854207054c0fc2d20cc74a9eb818f
SHA1

867e51bdfc3dfeaf1c644ba2c1400fe36a8d414d
SHA256

b513bc873cb6846cd3957141af65e5f9a30d673fcc2d4ab7ef09938cdf5bc81d
SHA512

e5eaf9c8cf7a57df4d1d5d3f14a104b9fd817a6e83903abb25d41d16a4665f12c88bbd8baf1eb46308ec53a704553ba5ca8e19e1179d4449343f4badd26b4e57
SSDEEP

24576:CpomTTN9ttttttttttttttttttttttttttttttttttttttttttttttttttttttt3:moo

Score

10^/10

tofsee discovery evasion 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

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\yviohlwn = "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

evasion

Windows Service

T1543.003

Disable or Modify System Firewall

T1562.004

pid	Process
2844	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\yviohlwn\ImagePath = "C:\\Windows\\SysWOW64\\yviohlwn\\rtmxemaq.exe"	svchost.exe

Deletes itself 1 IoCs

pid	Process
2584	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2876	rtmxemaq.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2876 set thread context of 2584	2876	rtmxemaq.exe	41

Launches sc.exe 3 IoCs

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

pid	Process
2468	sc.exe
2688	sc.exe
2872	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	2025-01-11_cf1854207054c0fc2d20cc74a9eb818f_mafia.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	netsh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rtmxemaq.exe
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	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	sc.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 1804 wrote to memory of 3044	1804	2025-01-11_cf1854207054c0fc2d20cc74a9eb818f_mafia.exe	30
PID 1804 wrote to memory of 3044	1804	2025-01-11_cf1854207054c0fc2d20cc74a9eb818f_mafia.exe	30
PID 1804 wrote to memory of 3044	1804	2025-01-11_cf1854207054c0fc2d20cc74a9eb818f_mafia.exe	30
PID 1804 wrote to memory of 3044	1804	2025-01-11_cf1854207054c0fc2d20cc74a9eb818f_mafia.exe	30
PID 1804 wrote to memory of 2312	1804	2025-01-11_cf1854207054c0fc2d20cc74a9eb818f_mafia.exe	32
PID 1804 wrote to memory of 2312	1804	2025-01-11_cf1854207054c0fc2d20cc74a9eb818f_mafia.exe	32
PID 1804 wrote to memory of 2312	1804	2025-01-11_cf1854207054c0fc2d20cc74a9eb818f_mafia.exe	32
PID 1804 wrote to memory of 2312	1804	2025-01-11_cf1854207054c0fc2d20cc74a9eb818f_mafia.exe	32
PID 1804 wrote to memory of 2468	1804	2025-01-11_cf1854207054c0fc2d20cc74a9eb818f_mafia.exe	34
PID 1804 wrote to memory of 2468	1804	2025-01-11_cf1854207054c0fc2d20cc74a9eb818f_mafia.exe	34
PID 1804 wrote to memory of 2468	1804	2025-01-11_cf1854207054c0fc2d20cc74a9eb818f_mafia.exe	34
PID 1804 wrote to memory of 2468	1804	2025-01-11_cf1854207054c0fc2d20cc74a9eb818f_mafia.exe	34
PID 1804 wrote to memory of 2688	1804	2025-01-11_cf1854207054c0fc2d20cc74a9eb818f_mafia.exe	36
PID 1804 wrote to memory of 2688	1804	2025-01-11_cf1854207054c0fc2d20cc74a9eb818f_mafia.exe	36
PID 1804 wrote to memory of 2688	1804	2025-01-11_cf1854207054c0fc2d20cc74a9eb818f_mafia.exe	36
PID 1804 wrote to memory of 2688	1804	2025-01-11_cf1854207054c0fc2d20cc74a9eb818f_mafia.exe	36
PID 1804 wrote to memory of 2872	1804	2025-01-11_cf1854207054c0fc2d20cc74a9eb818f_mafia.exe	38
PID 1804 wrote to memory of 2872	1804	2025-01-11_cf1854207054c0fc2d20cc74a9eb818f_mafia.exe	38
PID 1804 wrote to memory of 2872	1804	2025-01-11_cf1854207054c0fc2d20cc74a9eb818f_mafia.exe	38
PID 1804 wrote to memory of 2872	1804	2025-01-11_cf1854207054c0fc2d20cc74a9eb818f_mafia.exe	38
PID 2876 wrote to memory of 2584	2876	rtmxemaq.exe	41
PID 2876 wrote to memory of 2584	2876	rtmxemaq.exe	41
PID 2876 wrote to memory of 2584	2876	rtmxemaq.exe	41
PID 2876 wrote to memory of 2584	2876	rtmxemaq.exe	41
PID 2876 wrote to memory of 2584	2876	rtmxemaq.exe	41
PID 2876 wrote to memory of 2584	2876	rtmxemaq.exe	41
PID 1804 wrote to memory of 2844	1804	2025-01-11_cf1854207054c0fc2d20cc74a9eb818f_mafia.exe	42
PID 1804 wrote to memory of 2844	1804	2025-01-11_cf1854207054c0fc2d20cc74a9eb818f_mafia.exe	42
PID 1804 wrote to memory of 2844	1804	2025-01-11_cf1854207054c0fc2d20cc74a9eb818f_mafia.exe	42
PID 1804 wrote to memory of 2844	1804	2025-01-11_cf1854207054c0fc2d20cc74a9eb818f_mafia.exe	42

C:\Users\Admin\AppData\Local\Temp\2025-01-11_cf1854207054c0fc2d20cc74a9eb818f_mafia.exe
"C:\Users\Admin\AppData\Local\Temp\2025-01-11_cf1854207054c0fc2d20cc74a9eb818f_mafia.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1804
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\yviohlwn\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:3044
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\rtmxemaq.exe" C:\Windows\SysWOW64\yviohlwn\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2312
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create yviohlwn binPath= "C:\Windows\SysWOW64\yviohlwn\rtmxemaq.exe /d\"C:\Users\Admin\AppData\Local\Temp\2025-01-11_cf1854207054c0fc2d20cc74a9eb818f_mafia.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2468
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description yviohlwn "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2688
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start yviohlwn
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2872
- 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:2844

C:\Windows\SysWOW64\yviohlwn\rtmxemaq.exe
C:\Windows\SysWOW64\yviohlwn\rtmxemaq.exe /d"C:\Users\Admin\AppData\Local\Temp\2025-01-11_cf1854207054c0fc2d20cc74a9eb818f_mafia.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2876
- 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:2584

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\rtmxemaq.exe

Filesize
10.5MB

MD5
ac5da2f0f37074f41a649d48a7591771

SHA1
81bae2b32e95c53f7fe1688766b14532d304c9e9

SHA256
91b15bac99c57d22a94e8dc37ca58e943f4fa4aebb81af9df4a624574ef60658

SHA512
9e0ac5310d4e599f344954d2bde14ed305195fba7047550654d97c1cb35698b0b2273cf8b51b016699d07286ca884378b9232d999ceeabec6efcbaa7752e42ed

Download Submit
memory/1804-1-0x0000000000580000-0x0000000000680000-memory.dmp

Filesize
1024KB

Download
memory/1804-3-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/1804-2-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/1804-15-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/1804-16-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2584-11-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2584-10-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2584-8-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2584-17-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2584-18-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2876-13-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads