tofsee | 30d680f3ae43fd8dfb13eb0d9e97abb1006a5fcc985903d7e0b2d2a973ab28de

Analysis

max time kernel
146s
max time network
147s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
06/09/2024, 23:45

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General

Target

dd74a7e347d234599ba9a11fbd4d16a26a8f433c386cd30979938c8c039c4cfa.exe
Size

13.3MB
MD5

45458daf16a9f56222038e23cd8665f9
SHA1

c0880db345e5f94e5408707e7b495ab00ff6dc8c
SHA256

dd74a7e347d234599ba9a11fbd4d16a26a8f433c386cd30979938c8c039c4cfa
SHA512

f0154db0bca16aae19094f7f0236d91b4d49824b1a56c60bea75a19b9633490a578279eb290254c78ecbffa720c6dcdac191af34d1a2e6db046a95d292715231
SSDEEP

98304:dY3333333333333333333333333333333333333333333333333333333333333H: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\ijsrwbox = "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
2772	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\ijsrwbox\ImagePath = "C:\\Windows\\SysWOW64\\ijsrwbox\\gwrdxjnf.exe"	svchost.exe

Deletes itself 1 IoCs

pid	Process
2780	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2156	gwrdxjnf.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2156 set thread context of 2780	2156	gwrdxjnf.exe	43

Launches sc.exe 3 IoCs

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

pid	Process
2704	sc.exe
2752	sc.exe
2768	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	svchost.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	gwrdxjnf.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	dd74a7e347d234599ba9a11fbd4d16a26a8f433c386cd30979938c8c039c4cfa.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	netsh.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 1696 wrote to memory of 1864	1696	dd74a7e347d234599ba9a11fbd4d16a26a8f433c386cd30979938c8c039c4cfa.exe	30
PID 1696 wrote to memory of 1864	1696	dd74a7e347d234599ba9a11fbd4d16a26a8f433c386cd30979938c8c039c4cfa.exe	30
PID 1696 wrote to memory of 1864	1696	dd74a7e347d234599ba9a11fbd4d16a26a8f433c386cd30979938c8c039c4cfa.exe	30
PID 1696 wrote to memory of 1864	1696	dd74a7e347d234599ba9a11fbd4d16a26a8f433c386cd30979938c8c039c4cfa.exe	30
PID 1696 wrote to memory of 3060	1696	dd74a7e347d234599ba9a11fbd4d16a26a8f433c386cd30979938c8c039c4cfa.exe	32
PID 1696 wrote to memory of 3060	1696	dd74a7e347d234599ba9a11fbd4d16a26a8f433c386cd30979938c8c039c4cfa.exe	32
PID 1696 wrote to memory of 3060	1696	dd74a7e347d234599ba9a11fbd4d16a26a8f433c386cd30979938c8c039c4cfa.exe	32
PID 1696 wrote to memory of 3060	1696	dd74a7e347d234599ba9a11fbd4d16a26a8f433c386cd30979938c8c039c4cfa.exe	32
PID 1696 wrote to memory of 2704	1696	dd74a7e347d234599ba9a11fbd4d16a26a8f433c386cd30979938c8c039c4cfa.exe	34
PID 1696 wrote to memory of 2704	1696	dd74a7e347d234599ba9a11fbd4d16a26a8f433c386cd30979938c8c039c4cfa.exe	34
PID 1696 wrote to memory of 2704	1696	dd74a7e347d234599ba9a11fbd4d16a26a8f433c386cd30979938c8c039c4cfa.exe	34
PID 1696 wrote to memory of 2704	1696	dd74a7e347d234599ba9a11fbd4d16a26a8f433c386cd30979938c8c039c4cfa.exe	34
PID 1696 wrote to memory of 2752	1696	dd74a7e347d234599ba9a11fbd4d16a26a8f433c386cd30979938c8c039c4cfa.exe	36
PID 1696 wrote to memory of 2752	1696	dd74a7e347d234599ba9a11fbd4d16a26a8f433c386cd30979938c8c039c4cfa.exe	36
PID 1696 wrote to memory of 2752	1696	dd74a7e347d234599ba9a11fbd4d16a26a8f433c386cd30979938c8c039c4cfa.exe	36
PID 1696 wrote to memory of 2752	1696	dd74a7e347d234599ba9a11fbd4d16a26a8f433c386cd30979938c8c039c4cfa.exe	36
PID 1696 wrote to memory of 2768	1696	dd74a7e347d234599ba9a11fbd4d16a26a8f433c386cd30979938c8c039c4cfa.exe	38
PID 1696 wrote to memory of 2768	1696	dd74a7e347d234599ba9a11fbd4d16a26a8f433c386cd30979938c8c039c4cfa.exe	38
PID 1696 wrote to memory of 2768	1696	dd74a7e347d234599ba9a11fbd4d16a26a8f433c386cd30979938c8c039c4cfa.exe	38
PID 1696 wrote to memory of 2768	1696	dd74a7e347d234599ba9a11fbd4d16a26a8f433c386cd30979938c8c039c4cfa.exe	38
PID 1696 wrote to memory of 2772	1696	dd74a7e347d234599ba9a11fbd4d16a26a8f433c386cd30979938c8c039c4cfa.exe	41
PID 1696 wrote to memory of 2772	1696	dd74a7e347d234599ba9a11fbd4d16a26a8f433c386cd30979938c8c039c4cfa.exe	41
PID 1696 wrote to memory of 2772	1696	dd74a7e347d234599ba9a11fbd4d16a26a8f433c386cd30979938c8c039c4cfa.exe	41
PID 1696 wrote to memory of 2772	1696	dd74a7e347d234599ba9a11fbd4d16a26a8f433c386cd30979938c8c039c4cfa.exe	41
PID 2156 wrote to memory of 2780	2156	gwrdxjnf.exe	43
PID 2156 wrote to memory of 2780	2156	gwrdxjnf.exe	43
PID 2156 wrote to memory of 2780	2156	gwrdxjnf.exe	43
PID 2156 wrote to memory of 2780	2156	gwrdxjnf.exe	43
PID 2156 wrote to memory of 2780	2156	gwrdxjnf.exe	43
PID 2156 wrote to memory of 2780	2156	gwrdxjnf.exe	43

C:\Users\Admin\AppData\Local\Temp\dd74a7e347d234599ba9a11fbd4d16a26a8f433c386cd30979938c8c039c4cfa.exe
"C:\Users\Admin\AppData\Local\Temp\dd74a7e347d234599ba9a11fbd4d16a26a8f433c386cd30979938c8c039c4cfa.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1696
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\ijsrwbox\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:1864
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\gwrdxjnf.exe" C:\Windows\SysWOW64\ijsrwbox\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:3060
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create ijsrwbox binPath= "C:\Windows\SysWOW64\ijsrwbox\gwrdxjnf.exe /d\"C:\Users\Admin\AppData\Local\Temp\dd74a7e347d234599ba9a11fbd4d16a26a8f433c386cd30979938c8c039c4cfa.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2704
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description ijsrwbox "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2752
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start ijsrwbox
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2768
- 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:2772

C:\Windows\SysWOW64\ijsrwbox\gwrdxjnf.exe
C:\Windows\SysWOW64\ijsrwbox\gwrdxjnf.exe /d"C:\Users\Admin\AppData\Local\Temp\dd74a7e347d234599ba9a11fbd4d16a26a8f433c386cd30979938c8c039c4cfa.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2156
- 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:2780

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\gwrdxjnf.exe

Filesize
13.6MB

MD5
751bb5dd7469f54b0d59f2d9b2363a0e

SHA1
83f9ae951690eb01ca8aa2f2607b4802898165dd

SHA256
c83c9efd2d581cf2ebda40ec1cf9f8cd41ecbc7913e6719619380b6b2086629d

SHA512
b07adc0e31dfdc9e5154ab714c6265e1ed1cc467931a7c930ef24d26e1b183893e22323de12a348204c0712d59020b586d40ad768a15bbae817c8850bc2e54b1

Download Submit
memory/1696-8-0x0000000000400000-0x0000000000448000-memory.dmp

Filesize
288KB

Download
memory/1696-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/1696-1-0x00000000005E0000-0x00000000006E0000-memory.dmp

Filesize
1024KB

Download
memory/1696-10-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/1696-9-0x0000000000020000-0x0000000000033000-memory.dmp

Filesize
76KB

Download
memory/1696-2-0x0000000000020000-0x0000000000033000-memory.dmp

Filesize
76KB

Download
memory/2156-16-0x0000000000400000-0x0000000000448000-memory.dmp

Filesize
288KB

Download
memory/2780-11-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2780-17-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2780-14-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2780-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2780-18-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads