tofsee | e02a3d35c6708e86e89fc7d06f2f41219cfb7dca206276481a41adc4f0157bb6

Analysis

max time kernel
146s
max time network
153s
platform
windows7_x64
resource
win7-20240704-en
resource tags

arch:x64arch:x86image:win7-20240704-enlocale:en-usos:windows7-x64system
submitted
01-09-2024 14:16

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General

Target

b93a47f6924dbe4309eb656760e3edeafdd38061e8ef9add06598f95871260b6.exe
Size

12.9MB
MD5

92017ee762ffecb801be76e272ef66b5
SHA1

0171f93700ce9e398725ad857e7384031581846e
SHA256

b93a47f6924dbe4309eb656760e3edeafdd38061e8ef9add06598f95871260b6
SHA512

1701ed30435153b4b765775aeb68dd1e0751ef2cbc14e7016bcda1933060d881fdeb0a9145e527e29a98bcd3caec23433563d6af73babd3ce33c13242d258d75
SSDEEP

12288:BZwvqm0loTlEUKg7/ua4FXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXn:BSvqmNB/d

Score

10^/10

tofsee discovery evasion execution persistence privilege_escalation trojan

Malware Config

Extracted

Family

tofsee

defeatwax.ru

refabyd.info

Signatures

Tofsee
Backdoor/botnet which carries out malicious activities based on commands from a C2 server.
trojan 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\ofzanhjc = "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
2788	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\ofzanhjc\ImagePath = "C:\\Windows\\SysWOW64\\ofzanhjc\\rykxgtuo.exe"	svchost.exe

Deletes itself 1 IoCs

pid	Process
2396	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2052	rykxgtuo.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2052 set thread context of 2396	2052	rykxgtuo.exe	43

Launches sc.exe 3 IoCs

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

pid	Process
2248	sc.exe
2624	sc.exe
3028	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	rykxgtuo.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	b93a47f6924dbe4309eb656760e3edeafdd38061e8ef9add06598f95871260b6.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 2280 wrote to memory of 2760	2280	b93a47f6924dbe4309eb656760e3edeafdd38061e8ef9add06598f95871260b6.exe	30
PID 2280 wrote to memory of 2760	2280	b93a47f6924dbe4309eb656760e3edeafdd38061e8ef9add06598f95871260b6.exe	30
PID 2280 wrote to memory of 2760	2280	b93a47f6924dbe4309eb656760e3edeafdd38061e8ef9add06598f95871260b6.exe	30
PID 2280 wrote to memory of 2760	2280	b93a47f6924dbe4309eb656760e3edeafdd38061e8ef9add06598f95871260b6.exe	30
PID 2280 wrote to memory of 2848	2280	b93a47f6924dbe4309eb656760e3edeafdd38061e8ef9add06598f95871260b6.exe	32
PID 2280 wrote to memory of 2848	2280	b93a47f6924dbe4309eb656760e3edeafdd38061e8ef9add06598f95871260b6.exe	32
PID 2280 wrote to memory of 2848	2280	b93a47f6924dbe4309eb656760e3edeafdd38061e8ef9add06598f95871260b6.exe	32
PID 2280 wrote to memory of 2848	2280	b93a47f6924dbe4309eb656760e3edeafdd38061e8ef9add06598f95871260b6.exe	32
PID 2280 wrote to memory of 2248	2280	b93a47f6924dbe4309eb656760e3edeafdd38061e8ef9add06598f95871260b6.exe	34
PID 2280 wrote to memory of 2248	2280	b93a47f6924dbe4309eb656760e3edeafdd38061e8ef9add06598f95871260b6.exe	34
PID 2280 wrote to memory of 2248	2280	b93a47f6924dbe4309eb656760e3edeafdd38061e8ef9add06598f95871260b6.exe	34
PID 2280 wrote to memory of 2248	2280	b93a47f6924dbe4309eb656760e3edeafdd38061e8ef9add06598f95871260b6.exe	34
PID 2280 wrote to memory of 2624	2280	b93a47f6924dbe4309eb656760e3edeafdd38061e8ef9add06598f95871260b6.exe	36
PID 2280 wrote to memory of 2624	2280	b93a47f6924dbe4309eb656760e3edeafdd38061e8ef9add06598f95871260b6.exe	36
PID 2280 wrote to memory of 2624	2280	b93a47f6924dbe4309eb656760e3edeafdd38061e8ef9add06598f95871260b6.exe	36
PID 2280 wrote to memory of 2624	2280	b93a47f6924dbe4309eb656760e3edeafdd38061e8ef9add06598f95871260b6.exe	36
PID 2280 wrote to memory of 3028	2280	b93a47f6924dbe4309eb656760e3edeafdd38061e8ef9add06598f95871260b6.exe	38
PID 2280 wrote to memory of 3028	2280	b93a47f6924dbe4309eb656760e3edeafdd38061e8ef9add06598f95871260b6.exe	38
PID 2280 wrote to memory of 3028	2280	b93a47f6924dbe4309eb656760e3edeafdd38061e8ef9add06598f95871260b6.exe	38
PID 2280 wrote to memory of 3028	2280	b93a47f6924dbe4309eb656760e3edeafdd38061e8ef9add06598f95871260b6.exe	38
PID 2280 wrote to memory of 2788	2280	b93a47f6924dbe4309eb656760e3edeafdd38061e8ef9add06598f95871260b6.exe	41
PID 2280 wrote to memory of 2788	2280	b93a47f6924dbe4309eb656760e3edeafdd38061e8ef9add06598f95871260b6.exe	41
PID 2280 wrote to memory of 2788	2280	b93a47f6924dbe4309eb656760e3edeafdd38061e8ef9add06598f95871260b6.exe	41
PID 2280 wrote to memory of 2788	2280	b93a47f6924dbe4309eb656760e3edeafdd38061e8ef9add06598f95871260b6.exe	41
PID 2052 wrote to memory of 2396	2052	rykxgtuo.exe	43
PID 2052 wrote to memory of 2396	2052	rykxgtuo.exe	43
PID 2052 wrote to memory of 2396	2052	rykxgtuo.exe	43
PID 2052 wrote to memory of 2396	2052	rykxgtuo.exe	43
PID 2052 wrote to memory of 2396	2052	rykxgtuo.exe	43
PID 2052 wrote to memory of 2396	2052	rykxgtuo.exe	43

C:\Users\Admin\AppData\Local\Temp\b93a47f6924dbe4309eb656760e3edeafdd38061e8ef9add06598f95871260b6.exe
"C:\Users\Admin\AppData\Local\Temp\b93a47f6924dbe4309eb656760e3edeafdd38061e8ef9add06598f95871260b6.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2280
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\ofzanhjc\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2760
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\rykxgtuo.exe" C:\Windows\SysWOW64\ofzanhjc\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2848
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create ofzanhjc binPath= "C:\Windows\SysWOW64\ofzanhjc\rykxgtuo.exe /d\"C:\Users\Admin\AppData\Local\Temp\b93a47f6924dbe4309eb656760e3edeafdd38061e8ef9add06598f95871260b6.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2248
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description ofzanhjc "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2624
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start ofzanhjc
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3028
- 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:2788

C:\Windows\SysWOW64\ofzanhjc\rykxgtuo.exe
C:\Windows\SysWOW64\ofzanhjc\rykxgtuo.exe /d"C:\Users\Admin\AppData\Local\Temp\b93a47f6924dbe4309eb656760e3edeafdd38061e8ef9add06598f95871260b6.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2052
- 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:2396

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\rykxgtuo.exe

Filesize
10.8MB

MD5
9f7f2b4bc6aee3a22b9c2cdbc898b43f

SHA1
a68b5fa7cbf2cdc3115060143b922e2fb0e76530

SHA256
145cc23fc285cffe57f03871e11f9eca128c948fafb283eaeda259c9d263b59d

SHA512
5a3604a6e8c232cc0a7c160d3c871331b31e96a6b007b5b3178d65d648b0b5be62db2cc595256df84a4db72a1dd45a79e86d98879ddd98b072c8abec01ead557

Download Submit
memory/2052-15-0x0000000000400000-0x000000000044D000-memory.dmp

Filesize
308KB

Download
memory/2280-9-0x0000000000020000-0x0000000000033000-memory.dmp

Filesize
76KB

Download
memory/2280-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2280-8-0x0000000000400000-0x000000000044D000-memory.dmp

Filesize
308KB

Download
memory/2280-10-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2280-1-0x00000000005A0000-0x00000000006A0000-memory.dmp

Filesize
1024KB

Download
memory/2280-2-0x0000000000020000-0x0000000000033000-memory.dmp

Filesize
76KB

Download
memory/2396-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2396-14-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2396-11-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2396-16-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2396-17-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2396-18-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads