tofsee | c8b505762941917003a601f5528107f2f8430f28ba872d46402ae0e2072f73d0

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
22-11-2024 10:46

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General

Target

c8b505762941917003a601f5528107f2f8430f28ba872d46402ae0e2072f73d0.exe
Size

12.7MB
MD5

e2151306920f0b6337def574ee7008d6
SHA1

8679ca5f98cfc2b88fc988b79c5bf9a36c7d3775
SHA256

c8b505762941917003a601f5528107f2f8430f28ba872d46402ae0e2072f73d0
SHA512

97fc4eb0636c5917c5aadb433a90a89412a86ed731782347d6c7f6dc19ba8090972c6fa2a7dde6a05d10d1e35f5c637cb3a961f823592ab47f65daaab491bca1
SSDEEP

49152:TP1IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIK:c

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\ylwvxcsx = "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
2740	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\ylwvxcsx\ImagePath = "C:\\Windows\\SysWOW64\\ylwvxcsx\\phzgfwho.exe"	svchost.exe

Deletes itself 1 IoCs

pid	Process
2708	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2716	phzgfwho.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2716 set thread context of 2708	2716	phzgfwho.exe	43

Launches sc.exe 3 IoCs

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

pid	Process
2892	sc.exe
2572	sc.exe
2756	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	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
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	phzgfwho.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	c8b505762941917003a601f5528107f2f8430f28ba872d46402ae0e2072f73d0.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	netsh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 1740 wrote to memory of 340	1740	c8b505762941917003a601f5528107f2f8430f28ba872d46402ae0e2072f73d0.exe	30
PID 1740 wrote to memory of 340	1740	c8b505762941917003a601f5528107f2f8430f28ba872d46402ae0e2072f73d0.exe	30
PID 1740 wrote to memory of 340	1740	c8b505762941917003a601f5528107f2f8430f28ba872d46402ae0e2072f73d0.exe	30
PID 1740 wrote to memory of 340	1740	c8b505762941917003a601f5528107f2f8430f28ba872d46402ae0e2072f73d0.exe	30
PID 1740 wrote to memory of 1620	1740	c8b505762941917003a601f5528107f2f8430f28ba872d46402ae0e2072f73d0.exe	32
PID 1740 wrote to memory of 1620	1740	c8b505762941917003a601f5528107f2f8430f28ba872d46402ae0e2072f73d0.exe	32
PID 1740 wrote to memory of 1620	1740	c8b505762941917003a601f5528107f2f8430f28ba872d46402ae0e2072f73d0.exe	32
PID 1740 wrote to memory of 1620	1740	c8b505762941917003a601f5528107f2f8430f28ba872d46402ae0e2072f73d0.exe	32
PID 1740 wrote to memory of 2572	1740	c8b505762941917003a601f5528107f2f8430f28ba872d46402ae0e2072f73d0.exe	34
PID 1740 wrote to memory of 2572	1740	c8b505762941917003a601f5528107f2f8430f28ba872d46402ae0e2072f73d0.exe	34
PID 1740 wrote to memory of 2572	1740	c8b505762941917003a601f5528107f2f8430f28ba872d46402ae0e2072f73d0.exe	34
PID 1740 wrote to memory of 2572	1740	c8b505762941917003a601f5528107f2f8430f28ba872d46402ae0e2072f73d0.exe	34
PID 1740 wrote to memory of 2756	1740	c8b505762941917003a601f5528107f2f8430f28ba872d46402ae0e2072f73d0.exe	36
PID 1740 wrote to memory of 2756	1740	c8b505762941917003a601f5528107f2f8430f28ba872d46402ae0e2072f73d0.exe	36
PID 1740 wrote to memory of 2756	1740	c8b505762941917003a601f5528107f2f8430f28ba872d46402ae0e2072f73d0.exe	36
PID 1740 wrote to memory of 2756	1740	c8b505762941917003a601f5528107f2f8430f28ba872d46402ae0e2072f73d0.exe	36
PID 1740 wrote to memory of 2892	1740	c8b505762941917003a601f5528107f2f8430f28ba872d46402ae0e2072f73d0.exe	38
PID 1740 wrote to memory of 2892	1740	c8b505762941917003a601f5528107f2f8430f28ba872d46402ae0e2072f73d0.exe	38
PID 1740 wrote to memory of 2892	1740	c8b505762941917003a601f5528107f2f8430f28ba872d46402ae0e2072f73d0.exe	38
PID 1740 wrote to memory of 2892	1740	c8b505762941917003a601f5528107f2f8430f28ba872d46402ae0e2072f73d0.exe	38
PID 1740 wrote to memory of 2740	1740	c8b505762941917003a601f5528107f2f8430f28ba872d46402ae0e2072f73d0.exe	41
PID 1740 wrote to memory of 2740	1740	c8b505762941917003a601f5528107f2f8430f28ba872d46402ae0e2072f73d0.exe	41
PID 1740 wrote to memory of 2740	1740	c8b505762941917003a601f5528107f2f8430f28ba872d46402ae0e2072f73d0.exe	41
PID 1740 wrote to memory of 2740	1740	c8b505762941917003a601f5528107f2f8430f28ba872d46402ae0e2072f73d0.exe	41
PID 2716 wrote to memory of 2708	2716	phzgfwho.exe	43
PID 2716 wrote to memory of 2708	2716	phzgfwho.exe	43
PID 2716 wrote to memory of 2708	2716	phzgfwho.exe	43
PID 2716 wrote to memory of 2708	2716	phzgfwho.exe	43
PID 2716 wrote to memory of 2708	2716	phzgfwho.exe	43
PID 2716 wrote to memory of 2708	2716	phzgfwho.exe	43

C:\Users\Admin\AppData\Local\Temp\c8b505762941917003a601f5528107f2f8430f28ba872d46402ae0e2072f73d0.exe
"C:\Users\Admin\AppData\Local\Temp\c8b505762941917003a601f5528107f2f8430f28ba872d46402ae0e2072f73d0.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1740
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\ylwvxcsx\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:340
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\phzgfwho.exe" C:\Windows\SysWOW64\ylwvxcsx\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:1620
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create ylwvxcsx binPath= "C:\Windows\SysWOW64\ylwvxcsx\phzgfwho.exe /d\"C:\Users\Admin\AppData\Local\Temp\c8b505762941917003a601f5528107f2f8430f28ba872d46402ae0e2072f73d0.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2572
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description ylwvxcsx "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2756
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start ylwvxcsx
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2892
- 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:2740

C:\Windows\SysWOW64\ylwvxcsx\phzgfwho.exe
C:\Windows\SysWOW64\ylwvxcsx\phzgfwho.exe /d"C:\Users\Admin\AppData\Local\Temp\c8b505762941917003a601f5528107f2f8430f28ba872d46402ae0e2072f73d0.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2716
- 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:2708

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\phzgfwho.exe

Filesize
12.3MB

MD5
fa39196593a55ed7da9c567445e0c8da

SHA1
4c16b4ca8593acbc83782fa6d3118adddb30f9f9

SHA256
b94b1d447895b2dea0b6fbb3296cf378db4953dd4db9a83ed061d5a412e6a8b8

SHA512
b820a1dc466280d77bab64bb864ff430138f7b5ce923918a8c9828d0da05367c127c8601e2a404a1061bce8d98eece526c2d5c80992c62c015d20ac02642edb8

Download Submit
memory/1740-9-0x00000000002B0000-0x00000000002C3000-memory.dmp

Filesize
76KB

Download
memory/1740-4-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/1740-2-0x00000000002B0000-0x00000000002C3000-memory.dmp

Filesize
76KB

Download
memory/1740-8-0x0000000000400000-0x000000000076F000-memory.dmp

Filesize
3.4MB

Download
memory/1740-10-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/1740-1-0x00000000007F0000-0x00000000008F0000-memory.dmp

Filesize
1024KB

Download
memory/2708-11-0x0000000000120000-0x0000000000135000-memory.dmp

Filesize
84KB

Download
memory/2708-17-0x0000000000120000-0x0000000000135000-memory.dmp

Filesize
84KB

Download
memory/2708-14-0x0000000000120000-0x0000000000135000-memory.dmp

Filesize
84KB

Download
memory/2708-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2708-18-0x0000000000120000-0x0000000000135000-memory.dmp

Filesize
84KB

Download
memory/2716-15-0x0000000000400000-0x000000000076F000-memory.dmp

Filesize
3.4MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads