tofsee | cf1b38106e42989ddffb99e0163787135e7b294c5d5e88e3b47ca1b7cd0d6681

Analysis

max time kernel
143s
max time network
145s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
05-11-2024 08:10

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

0x000200000001acb5-183.exe
Size

10.2MB
MD5

6b32791ddadc54b2e770a881eb83c260
SHA1

d5815c8b204c47ebbb9f91c4f66e459e14136a32
SHA256

23cb1064049da1e64c231cacee9908d9c1aed6a57b786740361d206d14bd2973
SHA512

3a7334533bbcf4b1ad5b6200a9ef4c319a72ea06659e42c9b857e8e02c9115b04e63a61fb892f475456d53b907a7b7fe7fafb09d9e66cfc51481c2f170ac86fb
SSDEEP

3072:a4Ni29XsrLu6i5lJBq5pbNSwHSLlkEfr6c46GCMjjjjjjjjo:rj8rLu6qPqvb8wyLlnfGc46GCM

Score

10^/10

tofsee discovery evasion execution persistence privilege_escalation trojan

Malware Config

Extracted

Family

tofsee

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
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
2944	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\zyqcocuo\ImagePath = "C:\\Windows\\SysWOW64\\zyqcocuo\\dxxozizb.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-1-5-21-3756129449-3121373848-4276368241-1000\Control Panel\International\Geo\Nation	0x000200000001acb5-183.exe

Executes dropped EXE 1 IoCs

pid	Process
4176	dxxozizb.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4176 set thread context of 3996	4176	dxxozizb.exe	108

Launches sc.exe 3 IoCs

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

pid	Process
3348	sc.exe
4004	sc.exe
2712	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	dxxozizb.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	0x000200000001acb5-183.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	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 1536 wrote to memory of 1192	1536	0x000200000001acb5-183.exe	95
PID 1536 wrote to memory of 1192	1536	0x000200000001acb5-183.exe	95
PID 1536 wrote to memory of 1192	1536	0x000200000001acb5-183.exe	95
PID 1536 wrote to memory of 468	1536	0x000200000001acb5-183.exe	97
PID 1536 wrote to memory of 468	1536	0x000200000001acb5-183.exe	97
PID 1536 wrote to memory of 468	1536	0x000200000001acb5-183.exe	97
PID 1536 wrote to memory of 3348	1536	0x000200000001acb5-183.exe	99
PID 1536 wrote to memory of 3348	1536	0x000200000001acb5-183.exe	99
PID 1536 wrote to memory of 3348	1536	0x000200000001acb5-183.exe	99
PID 1536 wrote to memory of 4004	1536	0x000200000001acb5-183.exe	101
PID 1536 wrote to memory of 4004	1536	0x000200000001acb5-183.exe	101
PID 1536 wrote to memory of 4004	1536	0x000200000001acb5-183.exe	101
PID 1536 wrote to memory of 2712	1536	0x000200000001acb5-183.exe	103
PID 1536 wrote to memory of 2712	1536	0x000200000001acb5-183.exe	103
PID 1536 wrote to memory of 2712	1536	0x000200000001acb5-183.exe	103
PID 1536 wrote to memory of 2944	1536	0x000200000001acb5-183.exe	106
PID 1536 wrote to memory of 2944	1536	0x000200000001acb5-183.exe	106
PID 1536 wrote to memory of 2944	1536	0x000200000001acb5-183.exe	106
PID 4176 wrote to memory of 3996	4176	dxxozizb.exe	108
PID 4176 wrote to memory of 3996	4176	dxxozizb.exe	108
PID 4176 wrote to memory of 3996	4176	dxxozizb.exe	108
PID 4176 wrote to memory of 3996	4176	dxxozizb.exe	108
PID 4176 wrote to memory of 3996	4176	dxxozizb.exe	108

C:\Users\Admin\AppData\Local\Temp\0x000200000001acb5-183.exe
"C:\Users\Admin\AppData\Local\Temp\0x000200000001acb5-183.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1536
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\zyqcocuo\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:1192
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\dxxozizb.exe" C:\Windows\SysWOW64\zyqcocuo\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:468
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create zyqcocuo binPath= "C:\Windows\SysWOW64\zyqcocuo\dxxozizb.exe /d\"C:\Users\Admin\AppData\Local\Temp\0x000200000001acb5-183.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3348
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description zyqcocuo "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4004
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start zyqcocuo
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2712
- 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:2944

C:\Windows\SysWOW64\zyqcocuo\dxxozizb.exe
C:\Windows\SysWOW64\zyqcocuo\dxxozizb.exe /d"C:\Users\Admin\AppData\Local\Temp\0x000200000001acb5-183.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4176
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - System Location Discovery: System Language Discovery
  PID:3996

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

Replay Monitor

Loading Replay Monitor...

Downloads

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

Filesize
13.0MB

MD5
e9959faccf887effa120c65b037a9325

SHA1
7842278d021ab5eb919c90ebe496f557fd7238ab

SHA256
09384405ebf21def4a3480087a72fb492e8604aabf8729391413802c6e6e5a07

SHA512
d8ca88fb4a7a0d7a6063c676b7a3d551f4a6540bce05fd2d0fbf4c3bd2c738ee83f89ac29afae78fa7e6c827b3ea744a735d92b06c48bd23126390f79e9f5bb2

Download Submit
memory/1536-24-0x0000000000400000-0x00000000046CF000-memory.dmp

Filesize
66.8MB

Download
memory/1536-30-0x0000000000400000-0x00000000046CF000-memory.dmp

Filesize
66.8MB

Download
memory/1536-29-0x0000000000400000-0x00000000046CF000-memory.dmp

Filesize
66.8MB

Download
memory/1536-5-0x0000000000400000-0x00000000046CF000-memory.dmp

Filesize
66.8MB

Download
memory/1536-7-0x00000000062D0000-0x00000000062DD000-memory.dmp

Filesize
52KB

Download
memory/1536-8-0x00000000062E0000-0x00000000062F3000-memory.dmp

Filesize
76KB

Download
memory/1536-9-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/1536-10-0x0000000000400000-0x00000000046CF000-memory.dmp

Filesize
66.8MB

Download
memory/1536-28-0x0000000000400000-0x00000000046CF000-memory.dmp

Filesize
66.8MB

Download
memory/1536-27-0x0000000000400000-0x00000000046CF000-memory.dmp

Filesize
66.8MB

Download
memory/1536-14-0x0000000000400000-0x00000000046CF000-memory.dmp

Filesize
66.8MB

Download
memory/1536-26-0x0000000000400000-0x00000000046CF000-memory.dmp

Filesize
66.8MB

Download
memory/1536-0-0x00000000062D0000-0x00000000062DD000-memory.dmp

Filesize
52KB

Download
memory/1536-2-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/1536-25-0x0000000000400000-0x00000000046CF000-memory.dmp

Filesize
66.8MB

Download
memory/1536-18-0x0000000000400000-0x00000000046CF000-memory.dmp

Filesize
66.8MB

Download
memory/1536-20-0x0000000000400000-0x00000000046CF000-memory.dmp

Filesize
66.8MB

Download
memory/1536-1-0x00000000062E0000-0x00000000062F3000-memory.dmp

Filesize
76KB

Download
memory/1536-22-0x0000000000400000-0x00000000046CF000-memory.dmp

Filesize
66.8MB

Download
memory/1536-23-0x0000000000400000-0x00000000046CF000-memory.dmp

Filesize
66.8MB

Download
memory/3996-16-0x0000000000310000-0x0000000000325000-memory.dmp

Filesize
84KB

Download
memory/3996-12-0x0000000000310000-0x0000000000325000-memory.dmp

Filesize
84KB

Download
memory/3996-17-0x0000000000310000-0x0000000000325000-memory.dmp

Filesize
84KB

Download
memory/4176-21-0x0000000000400000-0x00000000046CF000-memory.dmp

Filesize
66.8MB

Download
memory/4176-19-0x0000000000400000-0x00000000046CF000-memory.dmp

Filesize
66.8MB

Download
memory/4176-11-0x0000000000400000-0x00000000046CF000-memory.dmp

Filesize
66.8MB

Download
memory/4176-15-0x0000000000400000-0x00000000046CF000-memory.dmp

Filesize
66.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads