tofsee | de2f8364ba3eec3963be343dbe4483357092b80173664702d0bb9069c8a7da08

Analysis

max time kernel
120s
max time network
111s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
24/11/2024, 04:10

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General

Target
de2f8364ba3eec3963be343dbe4483357092b80173664702d0bb9069c8a7da08.exe
Size 10.6MB
Sample241124-erjmhatkft
SHA256 de2f8364ba3eec3963be343dbe4483357092b80173664702d0bb9069c8a7da08
MD5 599879f0d1c0cd8dbab720e9b8b9f963
SHA1 af7e923a872f9480fa8880e13684bf5a8dcf3db3
SHA512 09a5a69e59f4f23b9be160da9d8d6eb87e594ce100acddf0d968d7c4600fdf9ca96b90df7add41fc8607f4fee357176d45b5b7c0dcdbda9d4572f8b4a6c605fb
SSDEEP 6144:jeaRFeYiZtnsLs/Xyihb124uKPoifbY/3sGIU5N5Z:jF7/iZtRXpu3ijwf5TZ
MD5 SHA1 SHA512 SSDEEP

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
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
1240	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\twtihgcm\ImagePath = "C:\\Windows\\SysWOW64\\twtihgcm\\fzisfinz.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-1-5-21-1045960512-3948844814-3059691613-1000\Control Panel\International\Geo\Nation	de2f8364ba3eec3963be343dbe4483357092b80173664702d0bb9069c8a7da08.exe

Deletes itself 1 IoCs

pid	Process
3480	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
208	fzisfinz.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 208 set thread context of 3480	208	fzisfinz.exe	104

Launches sc.exe 3 IoCs

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

pid	Process
4164	sc.exe
1320	sc.exe
4940	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 value enumerated	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe
Key opened	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe
Key queried	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe

Program crash 2 IoCs

pid	pid_target	Process	procid_target
5084	4736	WerFault.exe	82
4516	208	WerFault.exe	96

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	de2f8364ba3eec3963be343dbe4483357092b80173664702d0bb9069c8a7da08.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	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	fzisfinz.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 4736 wrote to memory of 5008	4736	de2f8364ba3eec3963be343dbe4483357092b80173664702d0bb9069c8a7da08.exe	83
PID 4736 wrote to memory of 5008	4736	de2f8364ba3eec3963be343dbe4483357092b80173664702d0bb9069c8a7da08.exe	83
PID 4736 wrote to memory of 5008	4736	de2f8364ba3eec3963be343dbe4483357092b80173664702d0bb9069c8a7da08.exe	83
PID 4736 wrote to memory of 1196	4736	de2f8364ba3eec3963be343dbe4483357092b80173664702d0bb9069c8a7da08.exe	85
PID 4736 wrote to memory of 1196	4736	de2f8364ba3eec3963be343dbe4483357092b80173664702d0bb9069c8a7da08.exe	85
PID 4736 wrote to memory of 1196	4736	de2f8364ba3eec3963be343dbe4483357092b80173664702d0bb9069c8a7da08.exe	85
PID 4736 wrote to memory of 4940	4736	de2f8364ba3eec3963be343dbe4483357092b80173664702d0bb9069c8a7da08.exe	87
PID 4736 wrote to memory of 4940	4736	de2f8364ba3eec3963be343dbe4483357092b80173664702d0bb9069c8a7da08.exe	87
PID 4736 wrote to memory of 4940	4736	de2f8364ba3eec3963be343dbe4483357092b80173664702d0bb9069c8a7da08.exe	87
PID 4736 wrote to memory of 4164	4736	de2f8364ba3eec3963be343dbe4483357092b80173664702d0bb9069c8a7da08.exe	90
PID 4736 wrote to memory of 4164	4736	de2f8364ba3eec3963be343dbe4483357092b80173664702d0bb9069c8a7da08.exe	90
PID 4736 wrote to memory of 4164	4736	de2f8364ba3eec3963be343dbe4483357092b80173664702d0bb9069c8a7da08.exe	90
PID 4736 wrote to memory of 1320	4736	de2f8364ba3eec3963be343dbe4483357092b80173664702d0bb9069c8a7da08.exe	94
PID 4736 wrote to memory of 1320	4736	de2f8364ba3eec3963be343dbe4483357092b80173664702d0bb9069c8a7da08.exe	94
PID 4736 wrote to memory of 1320	4736	de2f8364ba3eec3963be343dbe4483357092b80173664702d0bb9069c8a7da08.exe	94
PID 4736 wrote to memory of 1240	4736	de2f8364ba3eec3963be343dbe4483357092b80173664702d0bb9069c8a7da08.exe	97
PID 4736 wrote to memory of 1240	4736	de2f8364ba3eec3963be343dbe4483357092b80173664702d0bb9069c8a7da08.exe	97
PID 4736 wrote to memory of 1240	4736	de2f8364ba3eec3963be343dbe4483357092b80173664702d0bb9069c8a7da08.exe	97
PID 208 wrote to memory of 3480	208	fzisfinz.exe	104
PID 208 wrote to memory of 3480	208	fzisfinz.exe	104
PID 208 wrote to memory of 3480	208	fzisfinz.exe	104
PID 208 wrote to memory of 3480	208	fzisfinz.exe	104
PID 208 wrote to memory of 3480	208	fzisfinz.exe	104

C:\Users\Admin\AppData\Local\Temp\de2f8364ba3eec3963be343dbe4483357092b80173664702d0bb9069c8a7da08.exe
"C:\Users\Admin\AppData\Local\Temp\de2f8364ba3eec3963be343dbe4483357092b80173664702d0bb9069c8a7da08.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4736
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\twtihgcm\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:5008
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\fzisfinz.exe" C:\Windows\SysWOW64\twtihgcm\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:1196
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create twtihgcm binPath= "C:\Windows\SysWOW64\twtihgcm\fzisfinz.exe /d\"C:\Users\Admin\AppData\Local\Temp\de2f8364ba3eec3963be343dbe4483357092b80173664702d0bb9069c8a7da08.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4940
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description twtihgcm "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4164
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start twtihgcm
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:1320
- 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:1240
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4736 -s 1044
  2⤵
  - Program crash
  PID:5084

C:\Windows\SysWOW64\twtihgcm\fzisfinz.exe
C:\Windows\SysWOW64\twtihgcm\fzisfinz.exe /d"C:\Users\Admin\AppData\Local\Temp\de2f8364ba3eec3963be343dbe4483357092b80173664702d0bb9069c8a7da08.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:208
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:3480
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 208 -s 508
  2⤵
  - Program crash
  PID:4516

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 456 -p 4736 -ip 4736
1⤵
PID:4244

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 464 -p 208 -ip 208
1⤵
PID:1444

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

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

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

fzisfinz.exe

Path C:\Users\Admin\AppData\Local\Temp\fzisfinz.exe
Size 13.7MB
SHA256 e513f4d47b16947985cd2bcfcacec09bc54725d4688060c8feae805e2b285f39
MD5 57abf27d50f9c492283fb1e90d971959
SHA1 592c53897432d0baf94da272976fe65d280fa342
SHA512 a99429fdb38a7beae6131e15b50e07079c422db605f594319c4a9d3ad59f063e45fcb19b526aea3195a5e96aac2020a5f74b3d229983a1e8e83f8d2e1577ea13
SSDEEP 6144:geaRFeYiZtnsLs/Xyihb124uKPoifbY/3sGIU5N5:gF7/iZtRXpu3ijwf5T
MD5 SHA1 SHA512 SSDEEP

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memory/208-14-0x0000000000400000-0x000000000086B000-memory.dmp

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memory/208-8-0x0000000000400000-0x000000000086B000-memory.dmp

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memory/208-15-0x0000000000400000-0x000000000086B000-memory.dmp

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memory/208-17-0x0000000000400000-0x000000000086B000-memory.dmp

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memory/3480-12-0x00000000001C0000-0x00000000001D5000-memory.dmp

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memory/3480-18-0x00000000001C0000-0x00000000001D5000-memory.dmp

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memory/3480-19-0x00000000001C0000-0x00000000001D5000-memory.dmp

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memory/4736-3-0x0000000000400000-0x0000000000415000-memory.dmp

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memory/4736-2-0x00000000001C0000-0x00000000001D3000-memory.dmp

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memory/4736-1-0x0000000000B80000-0x0000000000C80000-memory.dmp

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memory/4736-11-0x0000000000400000-0x0000000000415000-memory.dmp

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memory/4736-10-0x00000000001C0000-0x00000000001D3000-memory.dmp

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memory/4736-9-0x0000000000400000-0x000000000086B000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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