tofsee | c79cbf63cee774ce8b02a785ad7ffbc956bd417c42598cd31e382aa88f2a6add

Analysis

max time kernel
118s
max time network
124s
platform
windows7_x64
resource
win7-20241010-en
resource tags

arch:x64arch:x86image:win7-20241010-enlocale:en-usos:windows7-x64system
submitted
23/11/2024, 01:05

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General

Target
c79cbf63cee774ce8b02a785ad7ffbc956bd417c42598cd31e382aa88f2a6add.exe
Size 12.8MB
Sample241123-bfp4cstndx
SHA256 c79cbf63cee774ce8b02a785ad7ffbc956bd417c42598cd31e382aa88f2a6add
MD5 75aaf5422bdf991928937b7d656080f5
SHA1 425ccba2469fc3bfad5ca0a9b5f3a1f8a6acac6c
SHA512 a4e45f29c106e3c166c887d44e349940ce581ea07eed15b1f465a30ccbae470e586c9cee37de85a8dd4bf6253f07bf272fac5bf9114601a25c78865b2a75ecc2
SSDEEP 49152:cN8888888888888888888888888888888888888888888888888888888888888u:0
MD5 SHA1 SHA512 SSDEEP

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\eiulttss = "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
2724	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\eiulttss\ImagePath = "C:\\Windows\\SysWOW64\\eiulttss\\gqvipkjy.exe"	svchost.exe

Deletes itself 1 IoCs

pid	Process
2508	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2840	gqvipkjy.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2840 set thread context of 2508	2840	gqvipkjy.exe	43

Launches sc.exe 3 IoCs

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

pid	Process
2920	sc.exe
2936	sc.exe
2916	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 value enumerated	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\NetSh	netsh.exe
Key opened	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\NetSh	netsh.exe
Key queried	\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	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	gqvipkjy.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	c79cbf63cee774ce8b02a785ad7ffbc956bd417c42598cd31e382aa88f2a6add.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

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 2900 wrote to memory of 2472	2900	c79cbf63cee774ce8b02a785ad7ffbc956bd417c42598cd31e382aa88f2a6add.exe	30
PID 2900 wrote to memory of 2472	2900	c79cbf63cee774ce8b02a785ad7ffbc956bd417c42598cd31e382aa88f2a6add.exe	30
PID 2900 wrote to memory of 2472	2900	c79cbf63cee774ce8b02a785ad7ffbc956bd417c42598cd31e382aa88f2a6add.exe	30
PID 2900 wrote to memory of 2472	2900	c79cbf63cee774ce8b02a785ad7ffbc956bd417c42598cd31e382aa88f2a6add.exe	30
PID 2900 wrote to memory of 2860	2900	c79cbf63cee774ce8b02a785ad7ffbc956bd417c42598cd31e382aa88f2a6add.exe	32
PID 2900 wrote to memory of 2860	2900	c79cbf63cee774ce8b02a785ad7ffbc956bd417c42598cd31e382aa88f2a6add.exe	32
PID 2900 wrote to memory of 2860	2900	c79cbf63cee774ce8b02a785ad7ffbc956bd417c42598cd31e382aa88f2a6add.exe	32
PID 2900 wrote to memory of 2860	2900	c79cbf63cee774ce8b02a785ad7ffbc956bd417c42598cd31e382aa88f2a6add.exe	32
PID 2900 wrote to memory of 2920	2900	c79cbf63cee774ce8b02a785ad7ffbc956bd417c42598cd31e382aa88f2a6add.exe	34
PID 2900 wrote to memory of 2920	2900	c79cbf63cee774ce8b02a785ad7ffbc956bd417c42598cd31e382aa88f2a6add.exe	34
PID 2900 wrote to memory of 2920	2900	c79cbf63cee774ce8b02a785ad7ffbc956bd417c42598cd31e382aa88f2a6add.exe	34
PID 2900 wrote to memory of 2920	2900	c79cbf63cee774ce8b02a785ad7ffbc956bd417c42598cd31e382aa88f2a6add.exe	34
PID 2900 wrote to memory of 2936	2900	c79cbf63cee774ce8b02a785ad7ffbc956bd417c42598cd31e382aa88f2a6add.exe	36
PID 2900 wrote to memory of 2936	2900	c79cbf63cee774ce8b02a785ad7ffbc956bd417c42598cd31e382aa88f2a6add.exe	36
PID 2900 wrote to memory of 2936	2900	c79cbf63cee774ce8b02a785ad7ffbc956bd417c42598cd31e382aa88f2a6add.exe	36
PID 2900 wrote to memory of 2936	2900	c79cbf63cee774ce8b02a785ad7ffbc956bd417c42598cd31e382aa88f2a6add.exe	36
PID 2900 wrote to memory of 2916	2900	c79cbf63cee774ce8b02a785ad7ffbc956bd417c42598cd31e382aa88f2a6add.exe	38
PID 2900 wrote to memory of 2916	2900	c79cbf63cee774ce8b02a785ad7ffbc956bd417c42598cd31e382aa88f2a6add.exe	38
PID 2900 wrote to memory of 2916	2900	c79cbf63cee774ce8b02a785ad7ffbc956bd417c42598cd31e382aa88f2a6add.exe	38
PID 2900 wrote to memory of 2916	2900	c79cbf63cee774ce8b02a785ad7ffbc956bd417c42598cd31e382aa88f2a6add.exe	38
PID 2900 wrote to memory of 2724	2900	c79cbf63cee774ce8b02a785ad7ffbc956bd417c42598cd31e382aa88f2a6add.exe	41
PID 2900 wrote to memory of 2724	2900	c79cbf63cee774ce8b02a785ad7ffbc956bd417c42598cd31e382aa88f2a6add.exe	41
PID 2900 wrote to memory of 2724	2900	c79cbf63cee774ce8b02a785ad7ffbc956bd417c42598cd31e382aa88f2a6add.exe	41
PID 2900 wrote to memory of 2724	2900	c79cbf63cee774ce8b02a785ad7ffbc956bd417c42598cd31e382aa88f2a6add.exe	41
PID 2840 wrote to memory of 2508	2840	gqvipkjy.exe	43
PID 2840 wrote to memory of 2508	2840	gqvipkjy.exe	43
PID 2840 wrote to memory of 2508	2840	gqvipkjy.exe	43
PID 2840 wrote to memory of 2508	2840	gqvipkjy.exe	43
PID 2840 wrote to memory of 2508	2840	gqvipkjy.exe	43
PID 2840 wrote to memory of 2508	2840	gqvipkjy.exe	43

C:\Users\Admin\AppData\Local\Temp\c79cbf63cee774ce8b02a785ad7ffbc956bd417c42598cd31e382aa88f2a6add.exe
"C:\Users\Admin\AppData\Local\Temp\c79cbf63cee774ce8b02a785ad7ffbc956bd417c42598cd31e382aa88f2a6add.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2900
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\eiulttss\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2472
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\gqvipkjy.exe" C:\Windows\SysWOW64\eiulttss\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2860
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create eiulttss binPath= "C:\Windows\SysWOW64\eiulttss\gqvipkjy.exe /d\"C:\Users\Admin\AppData\Local\Temp\c79cbf63cee774ce8b02a785ad7ffbc956bd417c42598cd31e382aa88f2a6add.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2920
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description eiulttss "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2936
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start eiulttss
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2916
- 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:2724

C:\Windows\SysWOW64\eiulttss\gqvipkjy.exe
C:\Windows\SysWOW64\eiulttss\gqvipkjy.exe /d"C:\Users\Admin\AppData\Local\Temp\c79cbf63cee774ce8b02a785ad7ffbc956bd417c42598cd31e382aa88f2a6add.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2840
- 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:2508

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

gqvipkjy.exe

Path C:\Users\Admin\AppData\Local\Temp\gqvipkjy.exe
Size 12.7MB
SHA256 4e82cafa4a25d3b37c6539e6f15f949f248bce0d4472c2b67b6a78016777c60d
MD5 22cf27ac11ed6ce881de5648646a26a2
SHA1 0dfa70e3a431c0d9efc2505e9fbfa22bf67c7f8f
SHA512 578c838b6a8ff14f5f27a9447224ade43696cb15112311dbe9b1c3de4587058769d0428d58f889de9c5c85b0e5d2536e9d93e01f0b026b23c23a7ada279e7d21
SSDEEP 49152:kN8888888888888888888888888888888888888888888888888888888888888E:
MD5 SHA1 SHA512 SSDEEP

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memory/2508-13-0x0000000000080000-0x0000000000095000-memory.dmp

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memory/2508-10-0x0000000000080000-0x0000000000095000-memory.dmp

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memory/2508-12-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

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memory/2508-16-0x0000000000080000-0x0000000000095000-memory.dmp

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memory/2508-17-0x0000000000080000-0x0000000000095000-memory.dmp

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memory/2840-14-0x0000000000400000-0x0000000002F05000-memory.dmp

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memory/2900-2-0x0000000000400000-0x0000000000415000-memory.dmp

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memory/2900-1-0x00000000001C0000-0x00000000001D3000-memory.dmp

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memory/2900-9-0x0000000000400000-0x0000000000415000-memory.dmp

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memory/2900-8-0x00000000001B0000-0x00000000001BD000-memory.dmp

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memory/2900-7-0x00000000001C0000-0x00000000001D3000-memory.dmp

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memory/2900-6-0x0000000000400000-0x0000000002F05000-memory.dmp

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memory/2900-0-0x00000000001B0000-0x00000000001BD000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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