tofsee | 8c65c06a996ac6862230624679911918f188155112aadc288b8453f4f629c6ff

Analysis

max time kernel
144s
max time network
145s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
26-12-2024 23:38

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General

Target

3db9a9633bb3097ee7f34cd85bbc168ed3a59496c0c407cf1d22087d58fa2763.exe
Size

293KB
MD5

e51a053134034365f39714c782c36a93
SHA1

91e470527e6df4a7d90da44c6d56768dae7eb85d
SHA256

3db9a9633bb3097ee7f34cd85bbc168ed3a59496c0c407cf1d22087d58fa2763
SHA512

4702b88bae5a39d1eefa49d1b2ea6113be5190120791b48d08073804929ee4d1391fbe6eb1191af8f62995c2188219c27f28e35600faeeaf7663397d71e9fd90
SSDEEP

6144:lBapH7MbNv/ALBKBCO4XS2y9EJS6GJIf9I48jVRoM7gn4:Hu7MbloLYAO4XS2y+eo8VRTk4

Score

10^/10

tofsee discovery evasion execution persistence privilege_escalation trojan

Malware Config

Extracted

Family

tofsee

patmushta.info

ovicrush.cn

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\mjzjggdl = "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
2904	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\mjzjggdl\ImagePath = "C:\\Windows\\SysWOW64\\mjzjggdl\\hvwyafsv.exe"	svchost.exe

Deletes itself 1 IoCs

pid	Process
2800	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
3004	hvwyafsv.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3004 set thread context of 2800	3004	hvwyafsv.exe	42

Launches sc.exe 3 IoCs

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

pid	Process
1664	sc.exe
2752	sc.exe
2828	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	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	hvwyafsv.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	netsh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	3db9a9633bb3097ee7f34cd85bbc168ed3a59496c0c407cf1d22087d58fa2763.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

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 2128 wrote to memory of 2392	2128	3db9a9633bb3097ee7f34cd85bbc168ed3a59496c0c407cf1d22087d58fa2763.exe	31
PID 2128 wrote to memory of 2392	2128	3db9a9633bb3097ee7f34cd85bbc168ed3a59496c0c407cf1d22087d58fa2763.exe	31
PID 2128 wrote to memory of 2392	2128	3db9a9633bb3097ee7f34cd85bbc168ed3a59496c0c407cf1d22087d58fa2763.exe	31
PID 2128 wrote to memory of 2392	2128	3db9a9633bb3097ee7f34cd85bbc168ed3a59496c0c407cf1d22087d58fa2763.exe	31
PID 2128 wrote to memory of 2424	2128	3db9a9633bb3097ee7f34cd85bbc168ed3a59496c0c407cf1d22087d58fa2763.exe	33
PID 2128 wrote to memory of 2424	2128	3db9a9633bb3097ee7f34cd85bbc168ed3a59496c0c407cf1d22087d58fa2763.exe	33
PID 2128 wrote to memory of 2424	2128	3db9a9633bb3097ee7f34cd85bbc168ed3a59496c0c407cf1d22087d58fa2763.exe	33
PID 2128 wrote to memory of 2424	2128	3db9a9633bb3097ee7f34cd85bbc168ed3a59496c0c407cf1d22087d58fa2763.exe	33
PID 2128 wrote to memory of 1664	2128	3db9a9633bb3097ee7f34cd85bbc168ed3a59496c0c407cf1d22087d58fa2763.exe	35
PID 2128 wrote to memory of 1664	2128	3db9a9633bb3097ee7f34cd85bbc168ed3a59496c0c407cf1d22087d58fa2763.exe	35
PID 2128 wrote to memory of 1664	2128	3db9a9633bb3097ee7f34cd85bbc168ed3a59496c0c407cf1d22087d58fa2763.exe	35
PID 2128 wrote to memory of 1664	2128	3db9a9633bb3097ee7f34cd85bbc168ed3a59496c0c407cf1d22087d58fa2763.exe	35
PID 2128 wrote to memory of 2752	2128	3db9a9633bb3097ee7f34cd85bbc168ed3a59496c0c407cf1d22087d58fa2763.exe	37
PID 2128 wrote to memory of 2752	2128	3db9a9633bb3097ee7f34cd85bbc168ed3a59496c0c407cf1d22087d58fa2763.exe	37
PID 2128 wrote to memory of 2752	2128	3db9a9633bb3097ee7f34cd85bbc168ed3a59496c0c407cf1d22087d58fa2763.exe	37
PID 2128 wrote to memory of 2752	2128	3db9a9633bb3097ee7f34cd85bbc168ed3a59496c0c407cf1d22087d58fa2763.exe	37
PID 2128 wrote to memory of 2828	2128	3db9a9633bb3097ee7f34cd85bbc168ed3a59496c0c407cf1d22087d58fa2763.exe	39
PID 2128 wrote to memory of 2828	2128	3db9a9633bb3097ee7f34cd85bbc168ed3a59496c0c407cf1d22087d58fa2763.exe	39
PID 2128 wrote to memory of 2828	2128	3db9a9633bb3097ee7f34cd85bbc168ed3a59496c0c407cf1d22087d58fa2763.exe	39
PID 2128 wrote to memory of 2828	2128	3db9a9633bb3097ee7f34cd85bbc168ed3a59496c0c407cf1d22087d58fa2763.exe	39
PID 3004 wrote to memory of 2800	3004	hvwyafsv.exe	42
PID 3004 wrote to memory of 2800	3004	hvwyafsv.exe	42
PID 3004 wrote to memory of 2800	3004	hvwyafsv.exe	42
PID 3004 wrote to memory of 2800	3004	hvwyafsv.exe	42
PID 3004 wrote to memory of 2800	3004	hvwyafsv.exe	42
PID 3004 wrote to memory of 2800	3004	hvwyafsv.exe	42
PID 2128 wrote to memory of 2904	2128	3db9a9633bb3097ee7f34cd85bbc168ed3a59496c0c407cf1d22087d58fa2763.exe	43
PID 2128 wrote to memory of 2904	2128	3db9a9633bb3097ee7f34cd85bbc168ed3a59496c0c407cf1d22087d58fa2763.exe	43
PID 2128 wrote to memory of 2904	2128	3db9a9633bb3097ee7f34cd85bbc168ed3a59496c0c407cf1d22087d58fa2763.exe	43
PID 2128 wrote to memory of 2904	2128	3db9a9633bb3097ee7f34cd85bbc168ed3a59496c0c407cf1d22087d58fa2763.exe	43

C:\Users\Admin\AppData\Local\Temp\3db9a9633bb3097ee7f34cd85bbc168ed3a59496c0c407cf1d22087d58fa2763.exe
"C:\Users\Admin\AppData\Local\Temp\3db9a9633bb3097ee7f34cd85bbc168ed3a59496c0c407cf1d22087d58fa2763.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2128
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\mjzjggdl\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2392
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\hvwyafsv.exe" C:\Windows\SysWOW64\mjzjggdl\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2424
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create mjzjggdl binPath= "C:\Windows\SysWOW64\mjzjggdl\hvwyafsv.exe /d\"C:\Users\Admin\AppData\Local\Temp\3db9a9633bb3097ee7f34cd85bbc168ed3a59496c0c407cf1d22087d58fa2763.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:1664
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description mjzjggdl "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 mjzjggdl
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2828
- 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:2904

C:\Windows\SysWOW64\mjzjggdl\hvwyafsv.exe
C:\Windows\SysWOW64\mjzjggdl\hvwyafsv.exe /d"C:\Users\Admin\AppData\Local\Temp\3db9a9633bb3097ee7f34cd85bbc168ed3a59496c0c407cf1d22087d58fa2763.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3004
- 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:2800

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\hvwyafsv.exe

Filesize
13.9MB

MD5
a0e2ad358fe31648fcdb6c707968272d

SHA1
cf5e73759f53344d2156604bff4a6b984e680dab

SHA256
58939dfb57c3f27c69a3224cda98a402fb0c3d1af6c864e2c2b733cacfb78223

SHA512
23461564f6094db2b6a29270561943fa53c30e3f27a8156339cc0578437b59cfc00e1245ebfed29918e675d8185c1397098e4f3e932b246e184d95b1a7bf71b5

Download Submit
memory/2128-16-0x00000000001B0000-0x00000000001C3000-memory.dmp

Filesize
76KB

Download
memory/2128-1-0x0000000000290000-0x0000000000390000-memory.dmp

Filesize
1024KB

Download
memory/2128-2-0x00000000001B0000-0x00000000001C3000-memory.dmp

Filesize
76KB

Download
memory/2128-14-0x0000000000400000-0x00000000004CD000-memory.dmp

Filesize
820KB

Download
memory/2128-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2128-15-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2800-8-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2800-11-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2800-10-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2800-17-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2800-18-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/3004-12-0x0000000000400000-0x00000000004CD000-memory.dmp

Filesize
820KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads