tofsee | 65355c0a686d8ba5f7551152571545331d64fe207a4f6c44ae67b240f3cbb19c

Analysis

max time kernel
144s
max time network
146s
platform
windows7_x64
resource
win7-20240708-en
resource tags

arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
submitted
01-09-2024 15:22

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General

Target

4fb9ec0883d7b509a16d73e2181f5236d13042706cb8bbe82091f8a9db4575d1.exe
Size

12.5MB
MD5

c4c9428ea6a30325f8ac6a3fecc199a1
SHA1

e8c27d01e8e1b4f11f6183e8ba4b3065392349ce
SHA256

4fb9ec0883d7b509a16d73e2181f5236d13042706cb8bbe82091f8a9db4575d1
SHA512

b052061f5936ee2f30fc18e81daa9542451a1ad58235bd180e7d01fa49977813945492890a1a37a3cec59bb261a626cd175f12ac85bec9e000273159980e7a33
SSDEEP

196608:TPRMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMP:T

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\uqxnibxj = "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
2564	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\uqxnibxj\ImagePath = "C:\\Windows\\SysWOW64\\uqxnibxj\\covpuanv.exe"	svchost.exe

Deletes itself 1 IoCs

pid	Process
1924	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2536	covpuanv.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2536 set thread context of 1924	2536	covpuanv.exe	43

Launches sc.exe 3 IoCs

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

pid	Process
2824	sc.exe
2556	sc.exe
2804	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 queried	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\NetSh	netsh.exe
Key value enumerated	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\NetSh	netsh.exe
Key opened	\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	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	netsh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	4fb9ec0883d7b509a16d73e2181f5236d13042706cb8bbe82091f8a9db4575d1.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	covpuanv.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 2652 wrote to memory of 2808	2652	4fb9ec0883d7b509a16d73e2181f5236d13042706cb8bbe82091f8a9db4575d1.exe	30
PID 2652 wrote to memory of 2808	2652	4fb9ec0883d7b509a16d73e2181f5236d13042706cb8bbe82091f8a9db4575d1.exe	30
PID 2652 wrote to memory of 2808	2652	4fb9ec0883d7b509a16d73e2181f5236d13042706cb8bbe82091f8a9db4575d1.exe	30
PID 2652 wrote to memory of 2808	2652	4fb9ec0883d7b509a16d73e2181f5236d13042706cb8bbe82091f8a9db4575d1.exe	30
PID 2652 wrote to memory of 2832	2652	4fb9ec0883d7b509a16d73e2181f5236d13042706cb8bbe82091f8a9db4575d1.exe	32
PID 2652 wrote to memory of 2832	2652	4fb9ec0883d7b509a16d73e2181f5236d13042706cb8bbe82091f8a9db4575d1.exe	32
PID 2652 wrote to memory of 2832	2652	4fb9ec0883d7b509a16d73e2181f5236d13042706cb8bbe82091f8a9db4575d1.exe	32
PID 2652 wrote to memory of 2832	2652	4fb9ec0883d7b509a16d73e2181f5236d13042706cb8bbe82091f8a9db4575d1.exe	32
PID 2652 wrote to memory of 2824	2652	4fb9ec0883d7b509a16d73e2181f5236d13042706cb8bbe82091f8a9db4575d1.exe	34
PID 2652 wrote to memory of 2824	2652	4fb9ec0883d7b509a16d73e2181f5236d13042706cb8bbe82091f8a9db4575d1.exe	34
PID 2652 wrote to memory of 2824	2652	4fb9ec0883d7b509a16d73e2181f5236d13042706cb8bbe82091f8a9db4575d1.exe	34
PID 2652 wrote to memory of 2824	2652	4fb9ec0883d7b509a16d73e2181f5236d13042706cb8bbe82091f8a9db4575d1.exe	34
PID 2652 wrote to memory of 2556	2652	4fb9ec0883d7b509a16d73e2181f5236d13042706cb8bbe82091f8a9db4575d1.exe	36
PID 2652 wrote to memory of 2556	2652	4fb9ec0883d7b509a16d73e2181f5236d13042706cb8bbe82091f8a9db4575d1.exe	36
PID 2652 wrote to memory of 2556	2652	4fb9ec0883d7b509a16d73e2181f5236d13042706cb8bbe82091f8a9db4575d1.exe	36
PID 2652 wrote to memory of 2556	2652	4fb9ec0883d7b509a16d73e2181f5236d13042706cb8bbe82091f8a9db4575d1.exe	36
PID 2652 wrote to memory of 2804	2652	4fb9ec0883d7b509a16d73e2181f5236d13042706cb8bbe82091f8a9db4575d1.exe	38
PID 2652 wrote to memory of 2804	2652	4fb9ec0883d7b509a16d73e2181f5236d13042706cb8bbe82091f8a9db4575d1.exe	38
PID 2652 wrote to memory of 2804	2652	4fb9ec0883d7b509a16d73e2181f5236d13042706cb8bbe82091f8a9db4575d1.exe	38
PID 2652 wrote to memory of 2804	2652	4fb9ec0883d7b509a16d73e2181f5236d13042706cb8bbe82091f8a9db4575d1.exe	38
PID 2652 wrote to memory of 2564	2652	4fb9ec0883d7b509a16d73e2181f5236d13042706cb8bbe82091f8a9db4575d1.exe	41
PID 2652 wrote to memory of 2564	2652	4fb9ec0883d7b509a16d73e2181f5236d13042706cb8bbe82091f8a9db4575d1.exe	41
PID 2652 wrote to memory of 2564	2652	4fb9ec0883d7b509a16d73e2181f5236d13042706cb8bbe82091f8a9db4575d1.exe	41
PID 2652 wrote to memory of 2564	2652	4fb9ec0883d7b509a16d73e2181f5236d13042706cb8bbe82091f8a9db4575d1.exe	41
PID 2536 wrote to memory of 1924	2536	covpuanv.exe	43
PID 2536 wrote to memory of 1924	2536	covpuanv.exe	43
PID 2536 wrote to memory of 1924	2536	covpuanv.exe	43
PID 2536 wrote to memory of 1924	2536	covpuanv.exe	43
PID 2536 wrote to memory of 1924	2536	covpuanv.exe	43
PID 2536 wrote to memory of 1924	2536	covpuanv.exe	43

C:\Users\Admin\AppData\Local\Temp\4fb9ec0883d7b509a16d73e2181f5236d13042706cb8bbe82091f8a9db4575d1.exe
"C:\Users\Admin\AppData\Local\Temp\4fb9ec0883d7b509a16d73e2181f5236d13042706cb8bbe82091f8a9db4575d1.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2652
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\uqxnibxj\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2808
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\covpuanv.exe" C:\Windows\SysWOW64\uqxnibxj\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2832
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create uqxnibxj binPath= "C:\Windows\SysWOW64\uqxnibxj\covpuanv.exe /d\"C:\Users\Admin\AppData\Local\Temp\4fb9ec0883d7b509a16d73e2181f5236d13042706cb8bbe82091f8a9db4575d1.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2824
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description uqxnibxj "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2556
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start uqxnibxj
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2804
- 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:2564

C:\Windows\SysWOW64\uqxnibxj\covpuanv.exe
C:\Windows\SysWOW64\uqxnibxj\covpuanv.exe /d"C:\Users\Admin\AppData\Local\Temp\4fb9ec0883d7b509a16d73e2181f5236d13042706cb8bbe82091f8a9db4575d1.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2536
- 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:1924

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\covpuanv.exe

Filesize
14.0MB

MD5
e421c649685e0cd8b2b2c4a4aac80072

SHA1
95eff500e83b3b2981ebd13e1ac82e8bc1ec8f82

SHA256
94f464a11c9e3d0a181bf3df19e9981bf3480e145d43a906a985220bfc45d074

SHA512
2a68137748ebf650684cea61c64db3804bf7bf9052b25bc6a061aeb4f128d35fba0e3f70d2b36ad0336c9bef221160a384aa36d1ce9e6a1ba69fdc194c8a9516

Download Submit
memory/1924-16-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/1924-18-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/1924-14-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/1924-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/1924-11-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2536-17-0x0000000000400000-0x0000000000871000-memory.dmp

Filesize
4.4MB

Download
memory/2652-1-0x0000000000270000-0x0000000000370000-memory.dmp

Filesize
1024KB

Download
memory/2652-2-0x0000000000020000-0x0000000000033000-memory.dmp

Filesize
76KB

Download
memory/2652-10-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2652-9-0x0000000000020000-0x0000000000033000-memory.dmp

Filesize
76KB

Download
memory/2652-8-0x0000000000400000-0x0000000000871000-memory.dmp

Filesize
4.4MB

Download
memory/2652-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads