tofsee | 4ed3097a377f184052b6114bca7910b82483069cb44f41018effb35ed8a4982f

General

Target

52a2fbd7660436a98e2201e0644c79a884c7e65d0aa9ae03e85dd712186b9756.exe
Size

12.1MB
MD5

0078e04b4b221dcf34b756a45a3908c0
SHA1

ee14854ccf6c55d5d4d84f124647c7af3b26385d
SHA256

52a2fbd7660436a98e2201e0644c79a884c7e65d0aa9ae03e85dd712186b9756
SHA512

b4cab47c711425aca34c8a9eb3b46ebcbdc0849fc43c1ba592a254e6f7228db628d3587806c9937263178bf760374ed4c8a6e7285a645c21b7b8326c66b6b086
SSDEEP

98304:m66666666666666666666666666666666666666666666666666666666666666z:

Score

10^/10

tofsee discovery evasion execution persistence privilege_escalation trojan

Malware Config

Extracted

Family

tofsee

C2

defeatwax.ru

refabyd.info

Signatures

Tofsee
Backdoor/botnet which carries out malicious activities based on commands from a C2 server.
trojan tofsee
Tofsee family
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
1772	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\fstmcxhe\ImagePath = "C:\\Windows\\SysWOW64\\fstmcxhe\\zxhffveu.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-1-5-21-3350944739-639801879-157714471-1000\Control Panel\International\Geo\Nation	52a2fbd7660436a98e2201e0644c79a884c7e65d0aa9ae03e85dd712186b9756.exe

Deletes itself 1 IoCs

pid	Process
2808	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
3612	zxhffveu.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3612 set thread context of 2808	3612	zxhffveu.exe	101

Launches sc.exe 3 IoCs

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

pid	Process
3516	sc.exe
2160	sc.exe
3116	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
3936	3720	WerFault.exe	82
4408	3612	WerFault.exe	94

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	52a2fbd7660436a98e2201e0644c79a884c7e65d0aa9ae03e85dd712186b9756.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	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	netsh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	zxhffveu.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 3720 wrote to memory of 2532	3720	52a2fbd7660436a98e2201e0644c79a884c7e65d0aa9ae03e85dd712186b9756.exe	83
PID 3720 wrote to memory of 2532	3720	52a2fbd7660436a98e2201e0644c79a884c7e65d0aa9ae03e85dd712186b9756.exe	83
PID 3720 wrote to memory of 2532	3720	52a2fbd7660436a98e2201e0644c79a884c7e65d0aa9ae03e85dd712186b9756.exe	83
PID 3720 wrote to memory of 3052	3720	52a2fbd7660436a98e2201e0644c79a884c7e65d0aa9ae03e85dd712186b9756.exe	85
PID 3720 wrote to memory of 3052	3720	52a2fbd7660436a98e2201e0644c79a884c7e65d0aa9ae03e85dd712186b9756.exe	85
PID 3720 wrote to memory of 3052	3720	52a2fbd7660436a98e2201e0644c79a884c7e65d0aa9ae03e85dd712186b9756.exe	85
PID 3720 wrote to memory of 3516	3720	52a2fbd7660436a98e2201e0644c79a884c7e65d0aa9ae03e85dd712186b9756.exe	87
PID 3720 wrote to memory of 3516	3720	52a2fbd7660436a98e2201e0644c79a884c7e65d0aa9ae03e85dd712186b9756.exe	87
PID 3720 wrote to memory of 3516	3720	52a2fbd7660436a98e2201e0644c79a884c7e65d0aa9ae03e85dd712186b9756.exe	87
PID 3720 wrote to memory of 2160	3720	52a2fbd7660436a98e2201e0644c79a884c7e65d0aa9ae03e85dd712186b9756.exe	89
PID 3720 wrote to memory of 2160	3720	52a2fbd7660436a98e2201e0644c79a884c7e65d0aa9ae03e85dd712186b9756.exe	89
PID 3720 wrote to memory of 2160	3720	52a2fbd7660436a98e2201e0644c79a884c7e65d0aa9ae03e85dd712186b9756.exe	89
PID 3720 wrote to memory of 3116	3720	52a2fbd7660436a98e2201e0644c79a884c7e65d0aa9ae03e85dd712186b9756.exe	92
PID 3720 wrote to memory of 3116	3720	52a2fbd7660436a98e2201e0644c79a884c7e65d0aa9ae03e85dd712186b9756.exe	92
PID 3720 wrote to memory of 3116	3720	52a2fbd7660436a98e2201e0644c79a884c7e65d0aa9ae03e85dd712186b9756.exe	92
PID 3720 wrote to memory of 1772	3720	52a2fbd7660436a98e2201e0644c79a884c7e65d0aa9ae03e85dd712186b9756.exe	95
PID 3720 wrote to memory of 1772	3720	52a2fbd7660436a98e2201e0644c79a884c7e65d0aa9ae03e85dd712186b9756.exe	95
PID 3720 wrote to memory of 1772	3720	52a2fbd7660436a98e2201e0644c79a884c7e65d0aa9ae03e85dd712186b9756.exe	95
PID 3612 wrote to memory of 2808	3612	zxhffveu.exe	101
PID 3612 wrote to memory of 2808	3612	zxhffveu.exe	101
PID 3612 wrote to memory of 2808	3612	zxhffveu.exe	101
PID 3612 wrote to memory of 2808	3612	zxhffveu.exe	101
PID 3612 wrote to memory of 2808	3612	zxhffveu.exe	101

C:\Users\Admin\AppData\Local\Temp\52a2fbd7660436a98e2201e0644c79a884c7e65d0aa9ae03e85dd712186b9756.exe
"C:\Users\Admin\AppData\Local\Temp\52a2fbd7660436a98e2201e0644c79a884c7e65d0aa9ae03e85dd712186b9756.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3720
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\fstmcxhe\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2532
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\zxhffveu.exe" C:\Windows\SysWOW64\fstmcxhe\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:3052
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create fstmcxhe binPath= "C:\Windows\SysWOW64\fstmcxhe\zxhffveu.exe /d\"C:\Users\Admin\AppData\Local\Temp\52a2fbd7660436a98e2201e0644c79a884c7e65d0aa9ae03e85dd712186b9756.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3516
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description fstmcxhe "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2160
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start fstmcxhe
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3116
- 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:1772
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3720 -s 1036
  2⤵
  - Program crash
  PID:3936

C:\Windows\SysWOW64\fstmcxhe\zxhffveu.exe
C:\Windows\SysWOW64\fstmcxhe\zxhffveu.exe /d"C:\Users\Admin\AppData\Local\Temp\52a2fbd7660436a98e2201e0644c79a884c7e65d0aa9ae03e85dd712186b9756.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3612
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:2808
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3612 -s 508
  2⤵
  - Program crash
  PID:4408

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 3720 -ip 3720
1⤵
PID:3952

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 496 -p 3612 -ip 3612
1⤵
PID:4136

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\zxhffveu.exe

Filesize
11.0MB

MD5
428f2069f47b7991abc31a3cb89fa8e0

SHA1
8bf3df1d30bcfccbec781e8edc7ff3a3daefde68

SHA256
9f5df41e3bab98b608e35611e5f3775354373ce638ecb199e9c9af40b5a067cf

SHA512
10ba1c5ffa47ddea850710905c4038e05d5b6e4a52ce622bfaa585db365db856d994036cd9a4763f50869ee78a9d6830de0f898793fa26c22a1067789b4304fa

Download Submit
memory/2808-11-0x0000000000810000-0x0000000000825000-memory.dmp

Filesize
84KB

Download
memory/2808-13-0x0000000000810000-0x0000000000825000-memory.dmp

Filesize
84KB

Download
memory/2808-14-0x0000000000810000-0x0000000000825000-memory.dmp

Filesize
84KB

Download
memory/3612-15-0x0000000000400000-0x0000000002B52000-memory.dmp

Filesize
39.3MB

Download
memory/3720-1-0x0000000002D20000-0x0000000002E20000-memory.dmp

Filesize
1024KB

Download
memory/3720-2-0x0000000002D00000-0x0000000002D13000-memory.dmp

Filesize
76KB

Download
memory/3720-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/3720-9-0x0000000002D00000-0x0000000002D13000-memory.dmp

Filesize
76KB

Download
memory/3720-10-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/3720-8-0x0000000000400000-0x0000000002B52000-memory.dmp

Filesize
39.3MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads