tofsee | 1e626285cd59cd6ebb05ad1113a8de552c897806b66ded1c3b98010114cd6313

General

Target

97d23550ec191ff048c89ae23e9ef5ae009ff65d79e2f286029ac90331bc90ba.exe
Size

281KB
MD5

3a9ef0bc05952c74715b6585f97c41f6
SHA1

877fa1694843c5bf3f5124e8b17ead26bc211c13
SHA256

97d23550ec191ff048c89ae23e9ef5ae009ff65d79e2f286029ac90331bc90ba
SHA512

2d67f3d29359ff2cdd058f6526e22604cf69f7126f09a0006fa8a34a90db0ac6d895cd78b5e570789d79584101add9e5ac732473d7e4cca5a9b8fee2262c2034
SSDEEP

6144:YTCpFumdDpw7jmzwdJ+nY6eYqX7tNfVXVHQLIiu8cfo0/pW:YTkFugpn2UxwZGEX8cA0/M

Score

10^/10

tofsee discovery evasion execution persistence privilege_escalation trojan

Malware Config

Extracted

Family

tofsee

C2

quadoil.ru

lakeflex.ru

Signatures

Tofsee
Backdoor/botnet which carries out malicious activities based on commands from a C2 server.
trojan tofsee
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
3384	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\cgwmnlls\ImagePath = "C:\\Windows\\SysWOW64\\cgwmnlls\\ixcdxfib.exe"	svchost.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-786284298-625481688-3210388970-1000\Control Panel\International\Geo\Nation	97d23550ec191ff048c89ae23e9ef5ae009ff65d79e2f286029ac90331bc90ba.exe

Deletes itself 1 IoCs

pid	Process
4612	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
452	ixcdxfib.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 452 set thread context of 4612	452	ixcdxfib.exe	107

Launches sc.exe 3 IoCs

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

pid	Process
3564	sc.exe
4484	sc.exe
1104	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

Program crash 2 IoCs

pid	pid_target	Process	procid_target
4332	1916	WerFault.exe	82
2468	452	WerFault.exe	100

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	97d23550ec191ff048c89ae23e9ef5ae009ff65d79e2f286029ac90331bc90ba.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
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	ixcdxfib.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 1916 wrote to memory of 4268	1916	97d23550ec191ff048c89ae23e9ef5ae009ff65d79e2f286029ac90331bc90ba.exe	86
PID 1916 wrote to memory of 4268	1916	97d23550ec191ff048c89ae23e9ef5ae009ff65d79e2f286029ac90331bc90ba.exe	86
PID 1916 wrote to memory of 4268	1916	97d23550ec191ff048c89ae23e9ef5ae009ff65d79e2f286029ac90331bc90ba.exe	86
PID 1916 wrote to memory of 3464	1916	97d23550ec191ff048c89ae23e9ef5ae009ff65d79e2f286029ac90331bc90ba.exe	90
PID 1916 wrote to memory of 3464	1916	97d23550ec191ff048c89ae23e9ef5ae009ff65d79e2f286029ac90331bc90ba.exe	90
PID 1916 wrote to memory of 3464	1916	97d23550ec191ff048c89ae23e9ef5ae009ff65d79e2f286029ac90331bc90ba.exe	90
PID 1916 wrote to memory of 4484	1916	97d23550ec191ff048c89ae23e9ef5ae009ff65d79e2f286029ac90331bc90ba.exe	92
PID 1916 wrote to memory of 4484	1916	97d23550ec191ff048c89ae23e9ef5ae009ff65d79e2f286029ac90331bc90ba.exe	92
PID 1916 wrote to memory of 4484	1916	97d23550ec191ff048c89ae23e9ef5ae009ff65d79e2f286029ac90331bc90ba.exe	92
PID 1916 wrote to memory of 1104	1916	97d23550ec191ff048c89ae23e9ef5ae009ff65d79e2f286029ac90331bc90ba.exe	96
PID 1916 wrote to memory of 1104	1916	97d23550ec191ff048c89ae23e9ef5ae009ff65d79e2f286029ac90331bc90ba.exe	96
PID 1916 wrote to memory of 1104	1916	97d23550ec191ff048c89ae23e9ef5ae009ff65d79e2f286029ac90331bc90ba.exe	96
PID 1916 wrote to memory of 3564	1916	97d23550ec191ff048c89ae23e9ef5ae009ff65d79e2f286029ac90331bc90ba.exe	98
PID 1916 wrote to memory of 3564	1916	97d23550ec191ff048c89ae23e9ef5ae009ff65d79e2f286029ac90331bc90ba.exe	98
PID 1916 wrote to memory of 3564	1916	97d23550ec191ff048c89ae23e9ef5ae009ff65d79e2f286029ac90331bc90ba.exe	98
PID 1916 wrote to memory of 3384	1916	97d23550ec191ff048c89ae23e9ef5ae009ff65d79e2f286029ac90331bc90ba.exe	101
PID 1916 wrote to memory of 3384	1916	97d23550ec191ff048c89ae23e9ef5ae009ff65d79e2f286029ac90331bc90ba.exe	101
PID 1916 wrote to memory of 3384	1916	97d23550ec191ff048c89ae23e9ef5ae009ff65d79e2f286029ac90331bc90ba.exe	101
PID 452 wrote to memory of 4612	452	ixcdxfib.exe	107
PID 452 wrote to memory of 4612	452	ixcdxfib.exe	107
PID 452 wrote to memory of 4612	452	ixcdxfib.exe	107
PID 452 wrote to memory of 4612	452	ixcdxfib.exe	107
PID 452 wrote to memory of 4612	452	ixcdxfib.exe	107

C:\Users\Admin\AppData\Local\Temp\97d23550ec191ff048c89ae23e9ef5ae009ff65d79e2f286029ac90331bc90ba.exe
"C:\Users\Admin\AppData\Local\Temp\97d23550ec191ff048c89ae23e9ef5ae009ff65d79e2f286029ac90331bc90ba.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1916
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\cgwmnlls\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4268
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\ixcdxfib.exe" C:\Windows\SysWOW64\cgwmnlls\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:3464
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create cgwmnlls binPath= "C:\Windows\SysWOW64\cgwmnlls\ixcdxfib.exe /d\"C:\Users\Admin\AppData\Local\Temp\97d23550ec191ff048c89ae23e9ef5ae009ff65d79e2f286029ac90331bc90ba.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4484
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description cgwmnlls "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:1104
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start cgwmnlls
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3564
- 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:3384
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1916 -s 1040
  2⤵
  - Program crash
  PID:4332

C:\Windows\SysWOW64\cgwmnlls\ixcdxfib.exe
C:\Windows\SysWOW64\cgwmnlls\ixcdxfib.exe /d"C:\Users\Admin\AppData\Local\Temp\97d23550ec191ff048c89ae23e9ef5ae009ff65d79e2f286029ac90331bc90ba.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:452
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:4612
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 452 -s 544
  2⤵
  - Program crash
  PID:2468

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 448 -p 1916 -ip 1916
1⤵
PID:1772

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 184 -p 452 -ip 452
1⤵
PID:2960

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

1

T1562

Disable or Modify System Firewall

Modify Registry

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

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\ixcdxfib.exe

Filesize
13.9MB

MD5
3f13240339ac293033c91a4eacc21bcc

SHA1
9c024eef37cbfd5d458a96350c2cbf63e0ec510c

SHA256
1e91a2a0ad1e7b51e8ca9a3089dab6049cc6cf0966c15632a99a626d54593286

SHA512
b2a79f3081c9c78025fa70947f45c494ff35033394b7eabef6b2e6c49f9ea0ee5879c61eddb8929fc5ecb4cc6cd97beee5e3aff7310b6606fd7311614c2e7727

Download Submit
memory/452-15-0x0000000000400000-0x0000000002F10000-memory.dmp

Filesize
43.1MB

Download
memory/1916-1-0x0000000003030000-0x0000000003130000-memory.dmp

Filesize
1024KB

Download
memory/1916-2-0x0000000002FA0000-0x0000000002FB3000-memory.dmp

Filesize
76KB

Download
memory/1916-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/1916-9-0x0000000002FA0000-0x0000000002FB3000-memory.dmp

Filesize
76KB

Download
memory/1916-10-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/1916-8-0x0000000000400000-0x0000000002F10000-memory.dmp

Filesize
43.1MB

Download
memory/4612-11-0x00000000012B0000-0x00000000012C5000-memory.dmp

Filesize
84KB

Download
memory/4612-13-0x00000000012B0000-0x00000000012C5000-memory.dmp

Filesize
84KB

Download
memory/4612-14-0x00000000012B0000-0x00000000012C5000-memory.dmp

Filesize
84KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads