tofsee | 83fcc1ada2ba29218388ebae476780e2d1b60ce6123bffbdca8398688fe037d1

Analysis

max time kernel
141s
max time network
120s
platform
windows7_x64
resource
win7-20250207-en
resource tags

arch:x64arch:x86image:win7-20250207-enlocale:en-usos:windows7-x64system
submitted
30/03/2025, 09:19

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General

Target

2025-03-30_437f4774772119f35bb3028350385af6_amadey_rhadamanthys_smoke-loader.exe
Size

10.6MB
MD5

437f4774772119f35bb3028350385af6
SHA1

1cf78bdcdb449015f41ca0d6e7fc32081591cec4
SHA256

83fcc1ada2ba29218388ebae476780e2d1b60ce6123bffbdca8398688fe037d1
SHA512

58831d413e37cae3ca24f5588390c0ff9eb3ea56207a0615d6c436c00a89bd1cf6117ffeaab718b7d98a947982c60764a2b88ed3ef6b77256adc77a6908f65a6
SSDEEP

3072:cCLVCtykRk5Kws3LQfNeBVe/KyNDrr91m:/eyki5KnUfNeBVe/E

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\fnmekmyv = "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
2780	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\fnmekmyv\ImagePath = "C:\\Windows\\SysWOW64\\fnmekmyv\\dxxozizb.exe"	svchost.exe

Deletes itself 1 IoCs

pid	Process
1716	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2640	dxxozizb.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2640 set thread context of 1716	2640	dxxozizb.exe	44

Launches sc.exe 3 IoCs

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

pid	Process
3056	sc.exe
2732	sc.exe
3024	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	dxxozizb.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	netsh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2025-03-30_437f4774772119f35bb3028350385af6_amadey_rhadamanthys_smoke-loader.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 2796 wrote to memory of 1628	2796	2025-03-30_437f4774772119f35bb3028350385af6_amadey_rhadamanthys_smoke-loader.exe	31
PID 2796 wrote to memory of 1628	2796	2025-03-30_437f4774772119f35bb3028350385af6_amadey_rhadamanthys_smoke-loader.exe	31
PID 2796 wrote to memory of 1628	2796	2025-03-30_437f4774772119f35bb3028350385af6_amadey_rhadamanthys_smoke-loader.exe	31
PID 2796 wrote to memory of 1628	2796	2025-03-30_437f4774772119f35bb3028350385af6_amadey_rhadamanthys_smoke-loader.exe	31
PID 2796 wrote to memory of 2880	2796	2025-03-30_437f4774772119f35bb3028350385af6_amadey_rhadamanthys_smoke-loader.exe	33
PID 2796 wrote to memory of 2880	2796	2025-03-30_437f4774772119f35bb3028350385af6_amadey_rhadamanthys_smoke-loader.exe	33
PID 2796 wrote to memory of 2880	2796	2025-03-30_437f4774772119f35bb3028350385af6_amadey_rhadamanthys_smoke-loader.exe	33
PID 2796 wrote to memory of 2880	2796	2025-03-30_437f4774772119f35bb3028350385af6_amadey_rhadamanthys_smoke-loader.exe	33
PID 2796 wrote to memory of 3056	2796	2025-03-30_437f4774772119f35bb3028350385af6_amadey_rhadamanthys_smoke-loader.exe	35
PID 2796 wrote to memory of 3056	2796	2025-03-30_437f4774772119f35bb3028350385af6_amadey_rhadamanthys_smoke-loader.exe	35
PID 2796 wrote to memory of 3056	2796	2025-03-30_437f4774772119f35bb3028350385af6_amadey_rhadamanthys_smoke-loader.exe	35
PID 2796 wrote to memory of 3056	2796	2025-03-30_437f4774772119f35bb3028350385af6_amadey_rhadamanthys_smoke-loader.exe	35
PID 2796 wrote to memory of 2732	2796	2025-03-30_437f4774772119f35bb3028350385af6_amadey_rhadamanthys_smoke-loader.exe	37
PID 2796 wrote to memory of 2732	2796	2025-03-30_437f4774772119f35bb3028350385af6_amadey_rhadamanthys_smoke-loader.exe	37
PID 2796 wrote to memory of 2732	2796	2025-03-30_437f4774772119f35bb3028350385af6_amadey_rhadamanthys_smoke-loader.exe	37
PID 2796 wrote to memory of 2732	2796	2025-03-30_437f4774772119f35bb3028350385af6_amadey_rhadamanthys_smoke-loader.exe	37
PID 2796 wrote to memory of 3024	2796	2025-03-30_437f4774772119f35bb3028350385af6_amadey_rhadamanthys_smoke-loader.exe	39
PID 2796 wrote to memory of 3024	2796	2025-03-30_437f4774772119f35bb3028350385af6_amadey_rhadamanthys_smoke-loader.exe	39
PID 2796 wrote to memory of 3024	2796	2025-03-30_437f4774772119f35bb3028350385af6_amadey_rhadamanthys_smoke-loader.exe	39
PID 2796 wrote to memory of 3024	2796	2025-03-30_437f4774772119f35bb3028350385af6_amadey_rhadamanthys_smoke-loader.exe	39
PID 2796 wrote to memory of 2780	2796	2025-03-30_437f4774772119f35bb3028350385af6_amadey_rhadamanthys_smoke-loader.exe	42
PID 2796 wrote to memory of 2780	2796	2025-03-30_437f4774772119f35bb3028350385af6_amadey_rhadamanthys_smoke-loader.exe	42
PID 2796 wrote to memory of 2780	2796	2025-03-30_437f4774772119f35bb3028350385af6_amadey_rhadamanthys_smoke-loader.exe	42
PID 2796 wrote to memory of 2780	2796	2025-03-30_437f4774772119f35bb3028350385af6_amadey_rhadamanthys_smoke-loader.exe	42
PID 2640 wrote to memory of 1716	2640	dxxozizb.exe	44
PID 2640 wrote to memory of 1716	2640	dxxozizb.exe	44
PID 2640 wrote to memory of 1716	2640	dxxozizb.exe	44
PID 2640 wrote to memory of 1716	2640	dxxozizb.exe	44
PID 2640 wrote to memory of 1716	2640	dxxozizb.exe	44
PID 2640 wrote to memory of 1716	2640	dxxozizb.exe	44

C:\Users\Admin\AppData\Local\Temp\2025-03-30_437f4774772119f35bb3028350385af6_amadey_rhadamanthys_smoke-loader.exe
"C:\Users\Admin\AppData\Local\Temp\2025-03-30_437f4774772119f35bb3028350385af6_amadey_rhadamanthys_smoke-loader.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2796
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\fnmekmyv\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:1628
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\dxxozizb.exe" C:\Windows\SysWOW64\fnmekmyv\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2880
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create fnmekmyv binPath= "C:\Windows\SysWOW64\fnmekmyv\dxxozizb.exe /d\"C:\Users\Admin\AppData\Local\Temp\2025-03-30_437f4774772119f35bb3028350385af6_amadey_rhadamanthys_smoke-loader.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3056
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description fnmekmyv "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2732
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start fnmekmyv
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3024
- 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:2780

C:\Windows\SysWOW64\fnmekmyv\dxxozizb.exe
C:\Windows\SysWOW64\fnmekmyv\dxxozizb.exe /d"C:\Users\Admin\AppData\Local\Temp\2025-03-30_437f4774772119f35bb3028350385af6_amadey_rhadamanthys_smoke-loader.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2640
- 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:1716

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\dxxozizb.exe

Filesize
13.5MB

MD5
6ee73699d7628ee1eb17d062eb753ed8

SHA1
974d4650a89523e0e9fb25b059253f42b0a8b4e1

SHA256
b8b38a6419468c657dd7caf254893a607a12ccb7d94c15114601d3c5ca0244a6

SHA512
c6879e7c9594fa59a0f1097f26a3e3833c0c76bf0a2a97be12e20c952f8b4fb93b611c4f2a0d608b4eb1c4a323361a4723d761ab2041b5912603f92e9f4cbd05

Download Submit
memory/1716-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/1716-14-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/1716-16-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/1716-11-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/1716-18-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2640-17-0x0000000000400000-0x0000000004A92000-memory.dmp

Filesize
70.6MB

Download
memory/2796-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2796-2-0x0000000000020000-0x0000000000033000-memory.dmp

Filesize
76KB

Download
memory/2796-9-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2796-8-0x0000000000020000-0x0000000000033000-memory.dmp

Filesize
76KB

Download
memory/2796-7-0x0000000000400000-0x0000000004A92000-memory.dmp

Filesize
70.6MB

Download
memory/2796-1-0x0000000004B80000-0x0000000004C80000-memory.dmp

Filesize
1024KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads