tofsee | ae1cbbf63e6551dacf902fdbe4a640a6a6dcfa180d185e02a6eeab4c9965db75

Analysis

max time kernel
144s
max time network
122s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
02-02-2025 20:24

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General

Target

2025-02-02_9b7c823ae2126b55d2c42d2d665d4bdc_mafia.exe
Size

10.2MB
MD5

9b7c823ae2126b55d2c42d2d665d4bdc
SHA1

ee5cd33b2668c6a94e2e77750bf5ec88ad6b6856
SHA256

ae1cbbf63e6551dacf902fdbe4a640a6a6dcfa180d185e02a6eeab4c9965db75
SHA512

e2f63157102151a7370c9b6cf5ec1ebe827410539545b7299db59c19b4c12d3fde482078488ea50cd9a0cc55f49ef21eb9c6b004eb43b6af5701916dabea0a71
SSDEEP

49152:MqE0YKr3fYPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPP:MqtYc3

Score

10^/10

tofsee defense_evasion discovery 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

Windows security bypass 2 TTPs 1 IoCs

defense_evasion trojan

Disable or Modify Tools

T1562.001

Modify Registry

T1112

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

defense_evasion

Windows Service

T1543.003

Disable or Modify System Firewall

T1562.004

pid	Process
2828	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\jrxgbui\ImagePath = "C:\\Windows\\SysWOW64\\jrxgbui\\kfjbrcec.exe"	svchost.exe

Deletes itself 1 IoCs

pid	Process
2960	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2908	kfjbrcec.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2908 set thread context of 2960	2908	kfjbrcec.exe	41

Launches sc.exe 3 IoCs

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

pid	Process
1620	sc.exe
2896	sc.exe
2416	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 queried	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\NetSh	netsh.exe
Key value enumerated	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\NetSh	netsh.exe
Key opened	\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	2025-02-02_9b7c823ae2126b55d2c42d2d665d4bdc_mafia.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	kfjbrcec.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	netsh.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

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 3012 wrote to memory of 1736	3012	2025-02-02_9b7c823ae2126b55d2c42d2d665d4bdc_mafia.exe	30
PID 3012 wrote to memory of 1736	3012	2025-02-02_9b7c823ae2126b55d2c42d2d665d4bdc_mafia.exe	30
PID 3012 wrote to memory of 1736	3012	2025-02-02_9b7c823ae2126b55d2c42d2d665d4bdc_mafia.exe	30
PID 3012 wrote to memory of 1736	3012	2025-02-02_9b7c823ae2126b55d2c42d2d665d4bdc_mafia.exe	30
PID 3012 wrote to memory of 2232	3012	2025-02-02_9b7c823ae2126b55d2c42d2d665d4bdc_mafia.exe	32
PID 3012 wrote to memory of 2232	3012	2025-02-02_9b7c823ae2126b55d2c42d2d665d4bdc_mafia.exe	32
PID 3012 wrote to memory of 2232	3012	2025-02-02_9b7c823ae2126b55d2c42d2d665d4bdc_mafia.exe	32
PID 3012 wrote to memory of 2232	3012	2025-02-02_9b7c823ae2126b55d2c42d2d665d4bdc_mafia.exe	32
PID 3012 wrote to memory of 2416	3012	2025-02-02_9b7c823ae2126b55d2c42d2d665d4bdc_mafia.exe	34
PID 3012 wrote to memory of 2416	3012	2025-02-02_9b7c823ae2126b55d2c42d2d665d4bdc_mafia.exe	34
PID 3012 wrote to memory of 2416	3012	2025-02-02_9b7c823ae2126b55d2c42d2d665d4bdc_mafia.exe	34
PID 3012 wrote to memory of 2416	3012	2025-02-02_9b7c823ae2126b55d2c42d2d665d4bdc_mafia.exe	34
PID 3012 wrote to memory of 1620	3012	2025-02-02_9b7c823ae2126b55d2c42d2d665d4bdc_mafia.exe	36
PID 3012 wrote to memory of 1620	3012	2025-02-02_9b7c823ae2126b55d2c42d2d665d4bdc_mafia.exe	36
PID 3012 wrote to memory of 1620	3012	2025-02-02_9b7c823ae2126b55d2c42d2d665d4bdc_mafia.exe	36
PID 3012 wrote to memory of 1620	3012	2025-02-02_9b7c823ae2126b55d2c42d2d665d4bdc_mafia.exe	36
PID 3012 wrote to memory of 2896	3012	2025-02-02_9b7c823ae2126b55d2c42d2d665d4bdc_mafia.exe	38
PID 3012 wrote to memory of 2896	3012	2025-02-02_9b7c823ae2126b55d2c42d2d665d4bdc_mafia.exe	38
PID 3012 wrote to memory of 2896	3012	2025-02-02_9b7c823ae2126b55d2c42d2d665d4bdc_mafia.exe	38
PID 3012 wrote to memory of 2896	3012	2025-02-02_9b7c823ae2126b55d2c42d2d665d4bdc_mafia.exe	38
PID 2908 wrote to memory of 2960	2908	kfjbrcec.exe	41
PID 2908 wrote to memory of 2960	2908	kfjbrcec.exe	41
PID 2908 wrote to memory of 2960	2908	kfjbrcec.exe	41
PID 2908 wrote to memory of 2960	2908	kfjbrcec.exe	41
PID 2908 wrote to memory of 2960	2908	kfjbrcec.exe	41
PID 2908 wrote to memory of 2960	2908	kfjbrcec.exe	41
PID 3012 wrote to memory of 2828	3012	2025-02-02_9b7c823ae2126b55d2c42d2d665d4bdc_mafia.exe	42
PID 3012 wrote to memory of 2828	3012	2025-02-02_9b7c823ae2126b55d2c42d2d665d4bdc_mafia.exe	42
PID 3012 wrote to memory of 2828	3012	2025-02-02_9b7c823ae2126b55d2c42d2d665d4bdc_mafia.exe	42
PID 3012 wrote to memory of 2828	3012	2025-02-02_9b7c823ae2126b55d2c42d2d665d4bdc_mafia.exe	42

C:\Users\Admin\AppData\Local\Temp\2025-02-02_9b7c823ae2126b55d2c42d2d665d4bdc_mafia.exe
"C:\Users\Admin\AppData\Local\Temp\2025-02-02_9b7c823ae2126b55d2c42d2d665d4bdc_mafia.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3012
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\jrxgbui\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:1736
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\kfjbrcec.exe" C:\Windows\SysWOW64\jrxgbui\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2232
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create jrxgbui binPath= "C:\Windows\SysWOW64\jrxgbui\kfjbrcec.exe /d\"C:\Users\Admin\AppData\Local\Temp\2025-02-02_9b7c823ae2126b55d2c42d2d665d4bdc_mafia.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2416
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description jrxgbui "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:1620
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start jrxgbui
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2896
- 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:2828

C:\Windows\SysWOW64\jrxgbui\kfjbrcec.exe
C:\Windows\SysWOW64\jrxgbui\kfjbrcec.exe /d"C:\Users\Admin\AppData\Local\Temp\2025-02-02_9b7c823ae2126b55d2c42d2d665d4bdc_mafia.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2908
- 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:2960

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

Disable or Modify Tools

T1562.001

Modify Registry

T1112

Credential Access

Discovery

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

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

Filesize
11.6MB

MD5
8672d89cd1e02a828cef9c3bfa2bc92a

SHA1
7b5588d27882443d414600a5e46ef5e8b4de6919

SHA256
cb2b57a45b397275366375d597709a6cae90c7546625b72f66d5e511c1c31940

SHA512
1d83ad4fdd77f73fa3fdd3fd7b2bfe7c696013316848b445e9231fc5a18955fca6b0619889fa3efe58eca022b2877f186d38511c2fc0c23c0b543c3437bb34de

Download Submit
memory/2908-13-0x0000000000400000-0x0000000002DC3000-memory.dmp

Filesize
41.8MB

Download
memory/2960-8-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download
memory/2960-11-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download
memory/2960-10-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2960-16-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download
memory/2960-17-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download
memory/3012-1-0x00000000002D0000-0x00000000003D0000-memory.dmp

Filesize
1024KB

Download
memory/3012-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/3012-2-0x0000000000020000-0x0000000000033000-memory.dmp

Filesize
76KB

Download
memory/3012-15-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/3012-14-0x0000000000400000-0x0000000002DC3000-memory.dmp

Filesize
41.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads