tofsee | afac4eb9d79efcd0395d59351bdef0776b852ea337601cfbd9a79da3a1fad6b2

General

Target

afac4eb9d79efcd0395d59351bdef0776b852ea337601cfbd9a79da3a1fad6b2.exe
Size

11.7MB
MD5

41e5a3e35502d37dbc0bf74651a2ec6c
SHA1

f50ce2fc231fc554a1592af2ca6ac1a8c4918286
SHA256

afac4eb9d79efcd0395d59351bdef0776b852ea337601cfbd9a79da3a1fad6b2
SHA512

0ff1255b91beb2c252a436fdc095cacb5a19c674037457743406024174e841d7285c0aa5abcfd47c7bd21999f313e13343e3675d3ecdbb8f9d760775befd9db9
SSDEEP

49152:Dyn7x7x7x7x7x7x7x7x7x7x7x7x7x7x7x7x7x7x7x7x7x7x7x7x7x7x7x7x7x7xd:DyB

Score

10^/10

tofsee discovery evasion execution persistence privilege_escalation trojan

Malware Config

Extracted

Family

tofsee

C2

43.231.4.7

lazystax.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

Processes:

svchost.exe

description	ioc	process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths\C:\Windows\SysWOW64\wgudlnns = "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

Processes:

netsh.exe

pid process

2752 netsh.exe

pid	process
2752	netsh.exe

Sets service image path in registry 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

svchost.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\wgudlnns\ImagePath = "C:\\Windows\\SysWOW64\\wgudlnns\\vqumcnpn.exe"	svchost.exe

Deletes itself 1 IoCs

Processes:

svchost.exe

pid process

2660 svchost.exe
Executes dropped EXE 1 IoCs

Processes:

vqumcnpn.exe

pid process

3004 vqumcnpn.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

vqumcnpn.exe

description pid process target process

PID 3004 set thread context of 2660 3004 vqumcnpn.exe svchost.exe
Launches sc.exe 3 IoCs
Sc.exe is a Windows utlilty to control services on the system.

Processes:

sc.exesc.exesc.exe

pid process

2896 sc.exe
3052 sc.exe
2868 sc.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
2660	svchost.exe

pid	process
3004	vqumcnpn.exe

description	pid	process	target process
PID 3004 set thread context of 2660	3004	vqumcnpn.exe	svchost.exe

pid	process
2896	sc.exe
3052	sc.exe
2868	sc.exe

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

Processes:

netsh.exe

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

Processes:

cmd.execmd.exesc.exesc.exesvchost.exeafac4eb9d79efcd0395d59351bdef0776b852ea337601cfbd9a79da3a1fad6b2.exesc.exenetsh.exevqumcnpn.exe

description	ioc	process
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	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	afac4eb9d79efcd0395d59351bdef0776b852ea337601cfbd9a79da3a1fad6b2.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	vqumcnpn.exe

Suspicious use of WriteProcessMemory 30 IoCs

Processes:

afac4eb9d79efcd0395d59351bdef0776b852ea337601cfbd9a79da3a1fad6b2.exevqumcnpn.exe

description	pid	process	target process
PID 2208 wrote to memory of 1504	2208	afac4eb9d79efcd0395d59351bdef0776b852ea337601cfbd9a79da3a1fad6b2.exe	cmd.exe
PID 2208 wrote to memory of 1504	2208	afac4eb9d79efcd0395d59351bdef0776b852ea337601cfbd9a79da3a1fad6b2.exe	cmd.exe
PID 2208 wrote to memory of 1504	2208	afac4eb9d79efcd0395d59351bdef0776b852ea337601cfbd9a79da3a1fad6b2.exe	cmd.exe
PID 2208 wrote to memory of 1504	2208	afac4eb9d79efcd0395d59351bdef0776b852ea337601cfbd9a79da3a1fad6b2.exe	cmd.exe
PID 2208 wrote to memory of 2440	2208	afac4eb9d79efcd0395d59351bdef0776b852ea337601cfbd9a79da3a1fad6b2.exe	cmd.exe
PID 2208 wrote to memory of 2440	2208	afac4eb9d79efcd0395d59351bdef0776b852ea337601cfbd9a79da3a1fad6b2.exe	cmd.exe
PID 2208 wrote to memory of 2440	2208	afac4eb9d79efcd0395d59351bdef0776b852ea337601cfbd9a79da3a1fad6b2.exe	cmd.exe
PID 2208 wrote to memory of 2440	2208	afac4eb9d79efcd0395d59351bdef0776b852ea337601cfbd9a79da3a1fad6b2.exe	cmd.exe
PID 2208 wrote to memory of 2896	2208	afac4eb9d79efcd0395d59351bdef0776b852ea337601cfbd9a79da3a1fad6b2.exe	sc.exe
PID 2208 wrote to memory of 2896	2208	afac4eb9d79efcd0395d59351bdef0776b852ea337601cfbd9a79da3a1fad6b2.exe	sc.exe
PID 2208 wrote to memory of 2896	2208	afac4eb9d79efcd0395d59351bdef0776b852ea337601cfbd9a79da3a1fad6b2.exe	sc.exe
PID 2208 wrote to memory of 2896	2208	afac4eb9d79efcd0395d59351bdef0776b852ea337601cfbd9a79da3a1fad6b2.exe	sc.exe
PID 2208 wrote to memory of 3052	2208	afac4eb9d79efcd0395d59351bdef0776b852ea337601cfbd9a79da3a1fad6b2.exe	sc.exe
PID 2208 wrote to memory of 3052	2208	afac4eb9d79efcd0395d59351bdef0776b852ea337601cfbd9a79da3a1fad6b2.exe	sc.exe
PID 2208 wrote to memory of 3052	2208	afac4eb9d79efcd0395d59351bdef0776b852ea337601cfbd9a79da3a1fad6b2.exe	sc.exe
PID 2208 wrote to memory of 3052	2208	afac4eb9d79efcd0395d59351bdef0776b852ea337601cfbd9a79da3a1fad6b2.exe	sc.exe
PID 2208 wrote to memory of 2868	2208	afac4eb9d79efcd0395d59351bdef0776b852ea337601cfbd9a79da3a1fad6b2.exe	sc.exe
PID 2208 wrote to memory of 2868	2208	afac4eb9d79efcd0395d59351bdef0776b852ea337601cfbd9a79da3a1fad6b2.exe	sc.exe
PID 2208 wrote to memory of 2868	2208	afac4eb9d79efcd0395d59351bdef0776b852ea337601cfbd9a79da3a1fad6b2.exe	sc.exe
PID 2208 wrote to memory of 2868	2208	afac4eb9d79efcd0395d59351bdef0776b852ea337601cfbd9a79da3a1fad6b2.exe	sc.exe
PID 2208 wrote to memory of 2752	2208	afac4eb9d79efcd0395d59351bdef0776b852ea337601cfbd9a79da3a1fad6b2.exe	netsh.exe
PID 2208 wrote to memory of 2752	2208	afac4eb9d79efcd0395d59351bdef0776b852ea337601cfbd9a79da3a1fad6b2.exe	netsh.exe
PID 2208 wrote to memory of 2752	2208	afac4eb9d79efcd0395d59351bdef0776b852ea337601cfbd9a79da3a1fad6b2.exe	netsh.exe
PID 2208 wrote to memory of 2752	2208	afac4eb9d79efcd0395d59351bdef0776b852ea337601cfbd9a79da3a1fad6b2.exe	netsh.exe
PID 3004 wrote to memory of 2660	3004	vqumcnpn.exe	svchost.exe
PID 3004 wrote to memory of 2660	3004	vqumcnpn.exe	svchost.exe
PID 3004 wrote to memory of 2660	3004	vqumcnpn.exe	svchost.exe
PID 3004 wrote to memory of 2660	3004	vqumcnpn.exe	svchost.exe
PID 3004 wrote to memory of 2660	3004	vqumcnpn.exe	svchost.exe
PID 3004 wrote to memory of 2660	3004	vqumcnpn.exe	svchost.exe

C:\Users\Admin\AppData\Local\Temp\afac4eb9d79efcd0395d59351bdef0776b852ea337601cfbd9a79da3a1fad6b2.exe
"C:\Users\Admin\AppData\Local\Temp\afac4eb9d79efcd0395d59351bdef0776b852ea337601cfbd9a79da3a1fad6b2.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2208
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\wgudlnns\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:1504
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\vqumcnpn.exe" C:\Windows\SysWOW64\wgudlnns\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2440
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create wgudlnns binPath= "C:\Windows\SysWOW64\wgudlnns\vqumcnpn.exe /d\"C:\Users\Admin\AppData\Local\Temp\afac4eb9d79efcd0395d59351bdef0776b852ea337601cfbd9a79da3a1fad6b2.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2896
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description wgudlnns "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3052
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start wgudlnns
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2868
- 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:2752

C:\Windows\SysWOW64\wgudlnns\vqumcnpn.exe
C:\Windows\SysWOW64\wgudlnns\vqumcnpn.exe /d"C:\Users\Admin\AppData\Local\Temp\afac4eb9d79efcd0395d59351bdef0776b852ea337601cfbd9a79da3a1fad6b2.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:2660

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

System Services

1

T1569

Service Execution

1

T1569.002

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Create or Modify System Process

2

T1543

Windows Service

2

T1543.003

Event Triggered Execution

1

T1546

Netsh Helper DLL

1

T1546.007

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Create or Modify System Process

2

T1543

Windows Service

2

T1543.003

Event Triggered Execution

1

T1546

Netsh Helper DLL

1

T1546.007

Defense Evasion

Impair Defenses

2

T1562

Disable or Modify System Firewall

1

T1562.004

Disable or Modify Tools

Modify Registry

Credential Access

Discovery

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\vqumcnpn.exe

Filesize
11.9MB

MD5
a3701c155144bd3a6a06e26ac639c2ef

SHA1
1f9e54d486f78430ed1d32d4f34b0f2baf250aa2

SHA256
396c7eb695064681b9b8ffec0ac37e9d9fd015daaa409dd977514340b652ba58

SHA512
0137209d999f7529309bfbd41e5c48e6e8be6d0a1da055c929a26809ca1e9b878433bc3e1657912d63a3cf622e0cf645a17191177b2f02bbff8bb6610ce92e1b

Download Submit
memory/2208-7-0x0000000000400000-0x0000000000461000-memory.dmp

Filesize
388KB

Download
memory/2208-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2208-1-0x00000000005C0000-0x00000000006C0000-memory.dmp

Filesize
1024KB

Download
memory/2208-9-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2208-8-0x0000000000020000-0x0000000000033000-memory.dmp

Filesize
76KB

Download
memory/2208-2-0x0000000000020000-0x0000000000033000-memory.dmp

Filesize
76KB

Download
memory/2660-16-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download
memory/2660-14-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download
memory/2660-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2660-11-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download
memory/2660-18-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download
memory/3004-17-0x0000000000400000-0x0000000000461000-memory.dmp

Filesize
388KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads