tofsee | 94d2886b9a43d885420c56ed2fbb1cfab5bcba56a586147e3c85105fe9811ed6

Analysis

max time kernel
144s
max time network
121s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
27/01/2025, 11:05

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General

Target

2025-01-27_5bc75a30d7408b73c62555e1e6bad49c_mafia.exe
Size

10.3MB
MD5

5bc75a30d7408b73c62555e1e6bad49c
SHA1

f9c5e43e43b879c87554a8a75a37c12e3b0b0d06
SHA256

94d2886b9a43d885420c56ed2fbb1cfab5bcba56a586147e3c85105fe9811ed6
SHA512

8cb2983b82d6246126da4782e6a2990598fc898eb4560280c1fe6b0399f2421d9e313816f77bd48ecd2f5b3eb8bb393ed2e7660185a5502181ee99ae14d71e74
SSDEEP

24576:UEfmTNIkv/ZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZg:xfotq

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\cuozbxfx = "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
2628	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\cuozbxfx\ImagePath = "C:\\Windows\\SysWOW64\\cuozbxfx\\yxlnbyzr.exe"	svchost.exe

Deletes itself 1 IoCs

pid	Process
2512	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2672	yxlnbyzr.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2672 set thread context of 2512	2672	yxlnbyzr.exe	41

Launches sc.exe 3 IoCs

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

pid	Process
2532	sc.exe
2544	sc.exe
2516	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	yxlnbyzr.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2025-01-27_5bc75a30d7408b73c62555e1e6bad49c_mafia.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	cmd.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	svchost.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 2980 wrote to memory of 2656	2980	2025-01-27_5bc75a30d7408b73c62555e1e6bad49c_mafia.exe	30
PID 2980 wrote to memory of 2656	2980	2025-01-27_5bc75a30d7408b73c62555e1e6bad49c_mafia.exe	30
PID 2980 wrote to memory of 2656	2980	2025-01-27_5bc75a30d7408b73c62555e1e6bad49c_mafia.exe	30
PID 2980 wrote to memory of 2656	2980	2025-01-27_5bc75a30d7408b73c62555e1e6bad49c_mafia.exe	30
PID 2980 wrote to memory of 2732	2980	2025-01-27_5bc75a30d7408b73c62555e1e6bad49c_mafia.exe	32
PID 2980 wrote to memory of 2732	2980	2025-01-27_5bc75a30d7408b73c62555e1e6bad49c_mafia.exe	32
PID 2980 wrote to memory of 2732	2980	2025-01-27_5bc75a30d7408b73c62555e1e6bad49c_mafia.exe	32
PID 2980 wrote to memory of 2732	2980	2025-01-27_5bc75a30d7408b73c62555e1e6bad49c_mafia.exe	32
PID 2980 wrote to memory of 2516	2980	2025-01-27_5bc75a30d7408b73c62555e1e6bad49c_mafia.exe	34
PID 2980 wrote to memory of 2516	2980	2025-01-27_5bc75a30d7408b73c62555e1e6bad49c_mafia.exe	34
PID 2980 wrote to memory of 2516	2980	2025-01-27_5bc75a30d7408b73c62555e1e6bad49c_mafia.exe	34
PID 2980 wrote to memory of 2516	2980	2025-01-27_5bc75a30d7408b73c62555e1e6bad49c_mafia.exe	34
PID 2980 wrote to memory of 2544	2980	2025-01-27_5bc75a30d7408b73c62555e1e6bad49c_mafia.exe	36
PID 2980 wrote to memory of 2544	2980	2025-01-27_5bc75a30d7408b73c62555e1e6bad49c_mafia.exe	36
PID 2980 wrote to memory of 2544	2980	2025-01-27_5bc75a30d7408b73c62555e1e6bad49c_mafia.exe	36
PID 2980 wrote to memory of 2544	2980	2025-01-27_5bc75a30d7408b73c62555e1e6bad49c_mafia.exe	36
PID 2980 wrote to memory of 2532	2980	2025-01-27_5bc75a30d7408b73c62555e1e6bad49c_mafia.exe	38
PID 2980 wrote to memory of 2532	2980	2025-01-27_5bc75a30d7408b73c62555e1e6bad49c_mafia.exe	38
PID 2980 wrote to memory of 2532	2980	2025-01-27_5bc75a30d7408b73c62555e1e6bad49c_mafia.exe	38
PID 2980 wrote to memory of 2532	2980	2025-01-27_5bc75a30d7408b73c62555e1e6bad49c_mafia.exe	38
PID 2672 wrote to memory of 2512	2672	yxlnbyzr.exe	41
PID 2672 wrote to memory of 2512	2672	yxlnbyzr.exe	41
PID 2672 wrote to memory of 2512	2672	yxlnbyzr.exe	41
PID 2672 wrote to memory of 2512	2672	yxlnbyzr.exe	41
PID 2672 wrote to memory of 2512	2672	yxlnbyzr.exe	41
PID 2672 wrote to memory of 2512	2672	yxlnbyzr.exe	41
PID 2980 wrote to memory of 2628	2980	2025-01-27_5bc75a30d7408b73c62555e1e6bad49c_mafia.exe	42
PID 2980 wrote to memory of 2628	2980	2025-01-27_5bc75a30d7408b73c62555e1e6bad49c_mafia.exe	42
PID 2980 wrote to memory of 2628	2980	2025-01-27_5bc75a30d7408b73c62555e1e6bad49c_mafia.exe	42
PID 2980 wrote to memory of 2628	2980	2025-01-27_5bc75a30d7408b73c62555e1e6bad49c_mafia.exe	42

C:\Users\Admin\AppData\Local\Temp\2025-01-27_5bc75a30d7408b73c62555e1e6bad49c_mafia.exe
"C:\Users\Admin\AppData\Local\Temp\2025-01-27_5bc75a30d7408b73c62555e1e6bad49c_mafia.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2980
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\cuozbxfx\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2656
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\yxlnbyzr.exe" C:\Windows\SysWOW64\cuozbxfx\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2732
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create cuozbxfx binPath= "C:\Windows\SysWOW64\cuozbxfx\yxlnbyzr.exe /d\"C:\Users\Admin\AppData\Local\Temp\2025-01-27_5bc75a30d7408b73c62555e1e6bad49c_mafia.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2516
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description cuozbxfx "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2544
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start cuozbxfx
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2532
- 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:2628

C:\Windows\SysWOW64\cuozbxfx\yxlnbyzr.exe
C:\Windows\SysWOW64\cuozbxfx\yxlnbyzr.exe /d"C:\Users\Admin\AppData\Local\Temp\2025-01-27_5bc75a30d7408b73c62555e1e6bad49c_mafia.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2672
- 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:2512

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:\Windows\SysWOW64\cuozbxfx\yxlnbyzr.exe

Filesize
11.0MB

MD5
c55d08222c2b38abdc4ab34829c7522a

SHA1
8fe21856022c81733f2e20b2e1f2d1a8f86e8f55

SHA256
e56539559c3f68dc582ce35d034c4078210895165225102c5ad4da35bb704b30

SHA512
6f3811147dcdb8ff3dd48f3f49e3146dff8ef0adf1d03cbd5e62fba9cf7e45ccadc3e4822178873ecb1c23d6b71bc478c6b13d41157bc1c8e4d70acebf317ab1

Download Submit
memory/2512-8-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2512-18-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2512-17-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2512-11-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2512-10-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2672-12-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/2980-16-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2980-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2980-1-0x0000000000580000-0x0000000000680000-memory.dmp

Filesize
1024KB

Download
memory/2980-2-0x0000000000020000-0x0000000000033000-memory.dmp

Filesize
76KB

Download
memory/2980-14-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/2980-15-0x0000000000020000-0x0000000000033000-memory.dmp

Filesize
76KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads