tofsee | d92e9ff83aa1bea9d8934580419e139de0eb37cb6eb9c90b804f70b9b501d416

Analysis

max time kernel
150s
max time network
154s
platform
windows7_x64
resource
win7-20241010-en
resource tags

arch:x64arch:x86image:win7-20241010-enlocale:en-usos:windows7-x64system
submitted
23-11-2024 20:00

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General

Target

d92e9ff83aa1bea9d8934580419e139de0eb37cb6eb9c90b804f70b9b501d416.exe
Size

12.8MB
MD5

92be29ef290920a9981893a1b0c28551
SHA1

8268a90e5c8860c467fcdac69e9765bac0b61782
SHA256

d92e9ff83aa1bea9d8934580419e139de0eb37cb6eb9c90b804f70b9b501d416
SHA512

f442b05da104a0f01dea2b6da54d2bf8da3b2c5f6c7087a22b026493ac9aeb2fbb62a1dfb545abc95fc0717452bd8b8d62e4742796394c50005380a9f5318e51
SSDEEP

6144:kNvMXNc7x72uNJFeTgkYIvpjkHp2e7z+/uyAmMGwDkqyyyyyyyyyyyyyyyyyyyyj:kNvM9i7fNJFeTgk9BjkHp2Euu1mrk

Score

10^/10

tofsee discovery evasion execution persistence privilege_escalation trojan

Malware Config

Extracted

Family

tofsee

quadoil.ru

lakeflex.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\tszskbyg = "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
2672	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\tszskbyg\ImagePath = "C:\\Windows\\SysWOW64\\tszskbyg\\ateufcvo.exe"	svchost.exe

Deletes itself 1 IoCs

pid	Process
2728	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2828	ateufcvo.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2828 set thread context of 2728	2828	ateufcvo.exe	43

Launches sc.exe 3 IoCs

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

pid	Process
2784	sc.exe
2852	sc.exe
2900	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	d92e9ff83aa1bea9d8934580419e139de0eb37cb6eb9c90b804f70b9b501d416.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	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	netsh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	ateufcvo.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 3040 wrote to memory of 2152	3040	d92e9ff83aa1bea9d8934580419e139de0eb37cb6eb9c90b804f70b9b501d416.exe	30
PID 3040 wrote to memory of 2152	3040	d92e9ff83aa1bea9d8934580419e139de0eb37cb6eb9c90b804f70b9b501d416.exe	30
PID 3040 wrote to memory of 2152	3040	d92e9ff83aa1bea9d8934580419e139de0eb37cb6eb9c90b804f70b9b501d416.exe	30
PID 3040 wrote to memory of 2152	3040	d92e9ff83aa1bea9d8934580419e139de0eb37cb6eb9c90b804f70b9b501d416.exe	30
PID 3040 wrote to memory of 2132	3040	d92e9ff83aa1bea9d8934580419e139de0eb37cb6eb9c90b804f70b9b501d416.exe	32
PID 3040 wrote to memory of 2132	3040	d92e9ff83aa1bea9d8934580419e139de0eb37cb6eb9c90b804f70b9b501d416.exe	32
PID 3040 wrote to memory of 2132	3040	d92e9ff83aa1bea9d8934580419e139de0eb37cb6eb9c90b804f70b9b501d416.exe	32
PID 3040 wrote to memory of 2132	3040	d92e9ff83aa1bea9d8934580419e139de0eb37cb6eb9c90b804f70b9b501d416.exe	32
PID 3040 wrote to memory of 2900	3040	d92e9ff83aa1bea9d8934580419e139de0eb37cb6eb9c90b804f70b9b501d416.exe	34
PID 3040 wrote to memory of 2900	3040	d92e9ff83aa1bea9d8934580419e139de0eb37cb6eb9c90b804f70b9b501d416.exe	34
PID 3040 wrote to memory of 2900	3040	d92e9ff83aa1bea9d8934580419e139de0eb37cb6eb9c90b804f70b9b501d416.exe	34
PID 3040 wrote to memory of 2900	3040	d92e9ff83aa1bea9d8934580419e139de0eb37cb6eb9c90b804f70b9b501d416.exe	34
PID 3040 wrote to memory of 2784	3040	d92e9ff83aa1bea9d8934580419e139de0eb37cb6eb9c90b804f70b9b501d416.exe	36
PID 3040 wrote to memory of 2784	3040	d92e9ff83aa1bea9d8934580419e139de0eb37cb6eb9c90b804f70b9b501d416.exe	36
PID 3040 wrote to memory of 2784	3040	d92e9ff83aa1bea9d8934580419e139de0eb37cb6eb9c90b804f70b9b501d416.exe	36
PID 3040 wrote to memory of 2784	3040	d92e9ff83aa1bea9d8934580419e139de0eb37cb6eb9c90b804f70b9b501d416.exe	36
PID 3040 wrote to memory of 2852	3040	d92e9ff83aa1bea9d8934580419e139de0eb37cb6eb9c90b804f70b9b501d416.exe	38
PID 3040 wrote to memory of 2852	3040	d92e9ff83aa1bea9d8934580419e139de0eb37cb6eb9c90b804f70b9b501d416.exe	38
PID 3040 wrote to memory of 2852	3040	d92e9ff83aa1bea9d8934580419e139de0eb37cb6eb9c90b804f70b9b501d416.exe	38
PID 3040 wrote to memory of 2852	3040	d92e9ff83aa1bea9d8934580419e139de0eb37cb6eb9c90b804f70b9b501d416.exe	38
PID 3040 wrote to memory of 2672	3040	d92e9ff83aa1bea9d8934580419e139de0eb37cb6eb9c90b804f70b9b501d416.exe	41
PID 3040 wrote to memory of 2672	3040	d92e9ff83aa1bea9d8934580419e139de0eb37cb6eb9c90b804f70b9b501d416.exe	41
PID 3040 wrote to memory of 2672	3040	d92e9ff83aa1bea9d8934580419e139de0eb37cb6eb9c90b804f70b9b501d416.exe	41
PID 3040 wrote to memory of 2672	3040	d92e9ff83aa1bea9d8934580419e139de0eb37cb6eb9c90b804f70b9b501d416.exe	41
PID 2828 wrote to memory of 2728	2828	ateufcvo.exe	43
PID 2828 wrote to memory of 2728	2828	ateufcvo.exe	43
PID 2828 wrote to memory of 2728	2828	ateufcvo.exe	43
PID 2828 wrote to memory of 2728	2828	ateufcvo.exe	43
PID 2828 wrote to memory of 2728	2828	ateufcvo.exe	43
PID 2828 wrote to memory of 2728	2828	ateufcvo.exe	43

C:\Users\Admin\AppData\Local\Temp\d92e9ff83aa1bea9d8934580419e139de0eb37cb6eb9c90b804f70b9b501d416.exe
"C:\Users\Admin\AppData\Local\Temp\d92e9ff83aa1bea9d8934580419e139de0eb37cb6eb9c90b804f70b9b501d416.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3040
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\tszskbyg\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2152
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\ateufcvo.exe" C:\Windows\SysWOW64\tszskbyg\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2132
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create tszskbyg binPath= "C:\Windows\SysWOW64\tszskbyg\ateufcvo.exe /d\"C:\Users\Admin\AppData\Local\Temp\d92e9ff83aa1bea9d8934580419e139de0eb37cb6eb9c90b804f70b9b501d416.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2900
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description tszskbyg "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2784
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start tszskbyg
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2852
- 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:2672

C:\Windows\SysWOW64\tszskbyg\ateufcvo.exe
C:\Windows\SysWOW64\tszskbyg\ateufcvo.exe /d"C:\Users\Admin\AppData\Local\Temp\d92e9ff83aa1bea9d8934580419e139de0eb37cb6eb9c90b804f70b9b501d416.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2828
- 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:2728

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\ateufcvo.exe

Filesize
12.9MB

MD5
13bb4419db35258ff4a86c916d848eee

SHA1
44bd306c4de8684765863b1d0870d4043076e786

SHA256
cf54ec1c330c2d4e068493157c9e562ebc64540da3e4f21d75b6b930cbec7b72

SHA512
b4297c937bc31fc8ef005d3655aa9405c6700b4a904db71a1ef94d06d72afb95658619ea5be9c8d00d48a5cc29b2564613e2d62a3acd22da21f281c1f84648d1

Download Submit
memory/2728-15-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2728-12-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2728-14-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2728-17-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2728-19-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2828-18-0x0000000000400000-0x0000000000784000-memory.dmp

Filesize
3.5MB

Download
memory/3040-4-0x0000000000400000-0x0000000000784000-memory.dmp

Filesize
3.5MB

Download
memory/3040-1-0x00000000008D0000-0x00000000009D0000-memory.dmp

Filesize
1024KB

Download
memory/3040-11-0x00000000008D0000-0x00000000009D0000-memory.dmp

Filesize
1024KB

Download
memory/3040-10-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/3040-9-0x0000000000400000-0x0000000000784000-memory.dmp

Filesize
3.5MB

Download
memory/3040-2-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads