tofsee | 035d12a143129c9bbe2fe00d0e7b2fab6c284cb75cc77cc1455d4c3f133d630b

Analysis

max time kernel
148s
max time network
127s
platform
windows7_x64
resource
win7-20241010-en
resource tags

arch:x64arch:x86image:win7-20241010-enlocale:en-usos:windows7-x64system
submitted
07-02-2025 21:18

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General

Target

2025-02-07_99039259a8ef48313104fe4620869457_mafia.exe
Size

10.8MB
MD5

99039259a8ef48313104fe4620869457
SHA1

d8565d92c48df49a98490092708e8958f65deb37
SHA256

035d12a143129c9bbe2fe00d0e7b2fab6c284cb75cc77cc1455d4c3f133d630b
SHA512

354feddda2f4a6a139200c19b9f6ab048a3f440ecd478cb88e624d4ed70e931ae061409efeb909e8d3194a71758a258bac4b48e874eeff49d3344a22550eee11
SSDEEP

196608:iyXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX:HXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXn

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\mbkelmrk = "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
2052	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\mbkelmrk\ImagePath = "C:\\Windows\\SysWOW64\\mbkelmrk\\cxbtjuwu.exe"	svchost.exe

Deletes itself 1 IoCs

pid	Process
2656	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
1780	cxbtjuwu.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1780 set thread context of 2656	1780	cxbtjuwu.exe	43

Launches sc.exe 3 IoCs

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

pid	Process
2920	sc.exe
2724	sc.exe
2752	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	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	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	netsh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cxbtjuwu.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2025-02-07_99039259a8ef48313104fe4620869457_mafia.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 3048 wrote to memory of 2736	3048	2025-02-07_99039259a8ef48313104fe4620869457_mafia.exe	30
PID 3048 wrote to memory of 2736	3048	2025-02-07_99039259a8ef48313104fe4620869457_mafia.exe	30
PID 3048 wrote to memory of 2736	3048	2025-02-07_99039259a8ef48313104fe4620869457_mafia.exe	30
PID 3048 wrote to memory of 2736	3048	2025-02-07_99039259a8ef48313104fe4620869457_mafia.exe	30
PID 3048 wrote to memory of 2796	3048	2025-02-07_99039259a8ef48313104fe4620869457_mafia.exe	32
PID 3048 wrote to memory of 2796	3048	2025-02-07_99039259a8ef48313104fe4620869457_mafia.exe	32
PID 3048 wrote to memory of 2796	3048	2025-02-07_99039259a8ef48313104fe4620869457_mafia.exe	32
PID 3048 wrote to memory of 2796	3048	2025-02-07_99039259a8ef48313104fe4620869457_mafia.exe	32
PID 3048 wrote to memory of 2724	3048	2025-02-07_99039259a8ef48313104fe4620869457_mafia.exe	34
PID 3048 wrote to memory of 2724	3048	2025-02-07_99039259a8ef48313104fe4620869457_mafia.exe	34
PID 3048 wrote to memory of 2724	3048	2025-02-07_99039259a8ef48313104fe4620869457_mafia.exe	34
PID 3048 wrote to memory of 2724	3048	2025-02-07_99039259a8ef48313104fe4620869457_mafia.exe	34
PID 3048 wrote to memory of 2752	3048	2025-02-07_99039259a8ef48313104fe4620869457_mafia.exe	36
PID 3048 wrote to memory of 2752	3048	2025-02-07_99039259a8ef48313104fe4620869457_mafia.exe	36
PID 3048 wrote to memory of 2752	3048	2025-02-07_99039259a8ef48313104fe4620869457_mafia.exe	36
PID 3048 wrote to memory of 2752	3048	2025-02-07_99039259a8ef48313104fe4620869457_mafia.exe	36
PID 3048 wrote to memory of 2920	3048	2025-02-07_99039259a8ef48313104fe4620869457_mafia.exe	38
PID 3048 wrote to memory of 2920	3048	2025-02-07_99039259a8ef48313104fe4620869457_mafia.exe	38
PID 3048 wrote to memory of 2920	3048	2025-02-07_99039259a8ef48313104fe4620869457_mafia.exe	38
PID 3048 wrote to memory of 2920	3048	2025-02-07_99039259a8ef48313104fe4620869457_mafia.exe	38
PID 3048 wrote to memory of 2052	3048	2025-02-07_99039259a8ef48313104fe4620869457_mafia.exe	40
PID 3048 wrote to memory of 2052	3048	2025-02-07_99039259a8ef48313104fe4620869457_mafia.exe	40
PID 3048 wrote to memory of 2052	3048	2025-02-07_99039259a8ef48313104fe4620869457_mafia.exe	40
PID 3048 wrote to memory of 2052	3048	2025-02-07_99039259a8ef48313104fe4620869457_mafia.exe	40
PID 1780 wrote to memory of 2656	1780	cxbtjuwu.exe	43
PID 1780 wrote to memory of 2656	1780	cxbtjuwu.exe	43
PID 1780 wrote to memory of 2656	1780	cxbtjuwu.exe	43
PID 1780 wrote to memory of 2656	1780	cxbtjuwu.exe	43
PID 1780 wrote to memory of 2656	1780	cxbtjuwu.exe	43
PID 1780 wrote to memory of 2656	1780	cxbtjuwu.exe	43

C:\Users\Admin\AppData\Local\Temp\2025-02-07_99039259a8ef48313104fe4620869457_mafia.exe
"C:\Users\Admin\AppData\Local\Temp\2025-02-07_99039259a8ef48313104fe4620869457_mafia.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3048
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\mbkelmrk\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2736
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\cxbtjuwu.exe" C:\Windows\SysWOW64\mbkelmrk\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2796
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create mbkelmrk binPath= "C:\Windows\SysWOW64\mbkelmrk\cxbtjuwu.exe /d\"C:\Users\Admin\AppData\Local\Temp\2025-02-07_99039259a8ef48313104fe4620869457_mafia.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2724
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description mbkelmrk "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2752
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start mbkelmrk
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2920
- 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:2052

C:\Windows\SysWOW64\mbkelmrk\cxbtjuwu.exe
C:\Windows\SysWOW64\mbkelmrk\cxbtjuwu.exe /d"C:\Users\Admin\AppData\Local\Temp\2025-02-07_99039259a8ef48313104fe4620869457_mafia.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1780
- 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:2656

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\cxbtjuwu.exe

Filesize
10.4MB

MD5
84d420f021fcac98773615ee5ef02e16

SHA1
6026658871dfc560b5c8f4e63df9bd143a9e3148

SHA256
34a44b3c1fe0d03bab32a58e994ce71b84e312911cf22704b94bd6e9dcea01ad

SHA512
ba03146887876314d068ec2592a396f019e14ebaa173624b539e6daa38d462e5534f96dcacdd9920600733f0cf0ee3eff6149be38061af0d7b30c29f34d5728e

Download Submit
memory/1780-17-0x0000000000400000-0x000000000045D000-memory.dmp

Filesize
372KB

Download
memory/2656-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2656-14-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2656-11-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2656-16-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2656-18-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/3048-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/3048-6-0x0000000000400000-0x000000000045D000-memory.dmp

Filesize
372KB

Download
memory/3048-8-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/3048-7-0x0000000000020000-0x0000000000033000-memory.dmp

Filesize
76KB

Download
memory/3048-1-0x0000000000590000-0x0000000000690000-memory.dmp

Filesize
1024KB

Download
memory/3048-2-0x0000000000020000-0x0000000000033000-memory.dmp

Filesize
76KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads