tofsee | 41dbb0db0f852fa822dfc024d3effdf27bafa549372f27244902f5fdefa25fd6

Analysis

max time kernel
119s
max time network
120s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
26-11-2024 20:43

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General

Target

41dbb0db0f852fa822dfc024d3effdf27bafa549372f27244902f5fdefa25fd6N.exe
Size

291KB
MD5

e9872731faa5e1fa5ef63e9a07fc0720
SHA1

6dcd38a92ef3920c1fcf85881b92deb2d9c1790a
SHA256

41dbb0db0f852fa822dfc024d3effdf27bafa549372f27244902f5fdefa25fd6
SHA512

0b0788ce65fb26fac72055c099bdd93fa313f0dcef51f82b4e4f4ea7b5cb5a4c7f06e997475da93ece16f1009804c6e13c06f33c9f18c06f3ee0918ba72aa809
SSDEEP

6144:HbDiEbQtM055szCZb55JgXrSXuZet0yob7PANco+hOg:UM450a55G7SXuZet0yob7Ro+F

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\nxftnabk = "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
2660	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\nxftnabk\ImagePath = "C:\\Windows\\SysWOW64\\nxftnabk\\oydqxsrg.exe"	svchost.exe

Deletes itself 1 IoCs

pid	Process
2724	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2732	oydqxsrg.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2732 set thread context of 2724	2732	oydqxsrg.exe	44

Launches sc.exe 3 IoCs

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

pid	Process
2728	sc.exe
1040	sc.exe
2676	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	oydqxsrg.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	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	41dbb0db0f852fa822dfc024d3effdf27bafa549372f27244902f5fdefa25fd6N.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 1324 wrote to memory of 1780	1324	41dbb0db0f852fa822dfc024d3effdf27bafa549372f27244902f5fdefa25fd6N.exe	31
PID 1324 wrote to memory of 1780	1324	41dbb0db0f852fa822dfc024d3effdf27bafa549372f27244902f5fdefa25fd6N.exe	31
PID 1324 wrote to memory of 1780	1324	41dbb0db0f852fa822dfc024d3effdf27bafa549372f27244902f5fdefa25fd6N.exe	31
PID 1324 wrote to memory of 1780	1324	41dbb0db0f852fa822dfc024d3effdf27bafa549372f27244902f5fdefa25fd6N.exe	31
PID 1324 wrote to memory of 2200	1324	41dbb0db0f852fa822dfc024d3effdf27bafa549372f27244902f5fdefa25fd6N.exe	33
PID 1324 wrote to memory of 2200	1324	41dbb0db0f852fa822dfc024d3effdf27bafa549372f27244902f5fdefa25fd6N.exe	33
PID 1324 wrote to memory of 2200	1324	41dbb0db0f852fa822dfc024d3effdf27bafa549372f27244902f5fdefa25fd6N.exe	33
PID 1324 wrote to memory of 2200	1324	41dbb0db0f852fa822dfc024d3effdf27bafa549372f27244902f5fdefa25fd6N.exe	33
PID 1324 wrote to memory of 1040	1324	41dbb0db0f852fa822dfc024d3effdf27bafa549372f27244902f5fdefa25fd6N.exe	35
PID 1324 wrote to memory of 1040	1324	41dbb0db0f852fa822dfc024d3effdf27bafa549372f27244902f5fdefa25fd6N.exe	35
PID 1324 wrote to memory of 1040	1324	41dbb0db0f852fa822dfc024d3effdf27bafa549372f27244902f5fdefa25fd6N.exe	35
PID 1324 wrote to memory of 1040	1324	41dbb0db0f852fa822dfc024d3effdf27bafa549372f27244902f5fdefa25fd6N.exe	35
PID 1324 wrote to memory of 2676	1324	41dbb0db0f852fa822dfc024d3effdf27bafa549372f27244902f5fdefa25fd6N.exe	37
PID 1324 wrote to memory of 2676	1324	41dbb0db0f852fa822dfc024d3effdf27bafa549372f27244902f5fdefa25fd6N.exe	37
PID 1324 wrote to memory of 2676	1324	41dbb0db0f852fa822dfc024d3effdf27bafa549372f27244902f5fdefa25fd6N.exe	37
PID 1324 wrote to memory of 2676	1324	41dbb0db0f852fa822dfc024d3effdf27bafa549372f27244902f5fdefa25fd6N.exe	37
PID 1324 wrote to memory of 2728	1324	41dbb0db0f852fa822dfc024d3effdf27bafa549372f27244902f5fdefa25fd6N.exe	39
PID 1324 wrote to memory of 2728	1324	41dbb0db0f852fa822dfc024d3effdf27bafa549372f27244902f5fdefa25fd6N.exe	39
PID 1324 wrote to memory of 2728	1324	41dbb0db0f852fa822dfc024d3effdf27bafa549372f27244902f5fdefa25fd6N.exe	39
PID 1324 wrote to memory of 2728	1324	41dbb0db0f852fa822dfc024d3effdf27bafa549372f27244902f5fdefa25fd6N.exe	39
PID 1324 wrote to memory of 2660	1324	41dbb0db0f852fa822dfc024d3effdf27bafa549372f27244902f5fdefa25fd6N.exe	42
PID 1324 wrote to memory of 2660	1324	41dbb0db0f852fa822dfc024d3effdf27bafa549372f27244902f5fdefa25fd6N.exe	42
PID 1324 wrote to memory of 2660	1324	41dbb0db0f852fa822dfc024d3effdf27bafa549372f27244902f5fdefa25fd6N.exe	42
PID 1324 wrote to memory of 2660	1324	41dbb0db0f852fa822dfc024d3effdf27bafa549372f27244902f5fdefa25fd6N.exe	42
PID 2732 wrote to memory of 2724	2732	oydqxsrg.exe	44
PID 2732 wrote to memory of 2724	2732	oydqxsrg.exe	44
PID 2732 wrote to memory of 2724	2732	oydqxsrg.exe	44
PID 2732 wrote to memory of 2724	2732	oydqxsrg.exe	44
PID 2732 wrote to memory of 2724	2732	oydqxsrg.exe	44
PID 2732 wrote to memory of 2724	2732	oydqxsrg.exe	44

C:\Users\Admin\AppData\Local\Temp\41dbb0db0f852fa822dfc024d3effdf27bafa549372f27244902f5fdefa25fd6N.exe
"C:\Users\Admin\AppData\Local\Temp\41dbb0db0f852fa822dfc024d3effdf27bafa549372f27244902f5fdefa25fd6N.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1324
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\nxftnabk\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:1780
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\oydqxsrg.exe" C:\Windows\SysWOW64\nxftnabk\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2200
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create nxftnabk binPath= "C:\Windows\SysWOW64\nxftnabk\oydqxsrg.exe /d\"C:\Users\Admin\AppData\Local\Temp\41dbb0db0f852fa822dfc024d3effdf27bafa549372f27244902f5fdefa25fd6N.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:1040
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description nxftnabk "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2676
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start nxftnabk
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2728
- 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:2660

C:\Windows\SysWOW64\nxftnabk\oydqxsrg.exe
C:\Windows\SysWOW64\nxftnabk\oydqxsrg.exe /d"C:\Users\Admin\AppData\Local\Temp\41dbb0db0f852fa822dfc024d3effdf27bafa549372f27244902f5fdefa25fd6N.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2732
- 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:2724

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\oydqxsrg.exe

Filesize
10.4MB

MD5
1453c9060ccf43a64b52f4f00e1cce02

SHA1
e4721781768cb5c6e3eef80c3834ff51a62cd44f

SHA256
dfa68031cd1ae54e88d6ae9722de91596acff0e16554e6ce394d495a9dda21e2

SHA512
aff25c1b5f6e8a1a37e350cd337076305db1ea7125b434e99ebd969b370eb7abbe1fa354dfd10883c8e95d95571e64bb6a782e15469d3879922c67c75a6b72a0

Download Submit
memory/1324-2-0x0000000000400000-0x0000000002B41000-memory.dmp

Filesize
39.3MB

Download
memory/1324-3-0x0000000000400000-0x0000000002B41000-memory.dmp

Filesize
39.3MB

Download
memory/1324-7-0x0000000000400000-0x0000000002B41000-memory.dmp

Filesize
39.3MB

Download
memory/2724-9-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2724-12-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2724-15-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2724-11-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2724-16-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2732-14-0x0000000000400000-0x0000000002B41000-memory.dmp

Filesize
39.3MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads