tofsee | 82ee833b8910eaf9657cb934e63ba26261207d6f167321d62681a4fcdeab6e11

General

Target

2025-02-05_08d539c30745d86b9c8bda52728e226b_mafia.exe
Size

14.3MB
MD5

08d539c30745d86b9c8bda52728e226b
SHA1

12848039f5ed97febb6fe81cbc65a4b8538e1d7e
SHA256

82ee833b8910eaf9657cb934e63ba26261207d6f167321d62681a4fcdeab6e11
SHA512

3a86da57d01e866ce988a49373356f0c104f97997cbd544753195192ea907b415fcad12a785036967457263f5514276b1358a3e427cd80195989ce340f7eb3c6
SSDEEP

6144:aLQ1p/2p5e+D2jFHO+iZoy6u9FlfrXEz9NQNQNQNQNQNQNQNQNQNQNQNQNQNQNQb:bTYe+D2jFu+iZoUFhAz2

Score

10^/10

tofsee defense_evasion discovery execution persistence privilege_escalation trojan

Malware Config

Extracted

Family

tofsee

C2

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

defense_evasion

Windows Service

T1543.003

Disable or Modify System Firewall

T1562.004

pid	Process
3048	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\bjoueuny\ImagePath = "C:\\Windows\\SysWOW64\\bjoueuny\\wetxkirr.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-1-5-21-4003209913-3868522715-854928974-1000\Control Panel\International\Geo\Nation	2025-02-05_08d539c30745d86b9c8bda52728e226b_mafia.exe

Deletes itself 1 IoCs

pid	Process
1136	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
4568	wetxkirr.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4568 set thread context of 1136	4568	wetxkirr.exe	106

Launches sc.exe 3 IoCs

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

pid	Process
312	sc.exe
2684	sc.exe
3168	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

Program crash 2 IoCs

pid	pid_target	Process	procid_target
4608	5100	WerFault.exe	83
2772	4568	WerFault.exe	100

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	2025-02-05_08d539c30745d86b9c8bda52728e226b_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	wetxkirr.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
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	netsh.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 5100 wrote to memory of 4680	5100	2025-02-05_08d539c30745d86b9c8bda52728e226b_mafia.exe	87
PID 5100 wrote to memory of 4680	5100	2025-02-05_08d539c30745d86b9c8bda52728e226b_mafia.exe	87
PID 5100 wrote to memory of 4680	5100	2025-02-05_08d539c30745d86b9c8bda52728e226b_mafia.exe	87
PID 5100 wrote to memory of 3552	5100	2025-02-05_08d539c30745d86b9c8bda52728e226b_mafia.exe	89
PID 5100 wrote to memory of 3552	5100	2025-02-05_08d539c30745d86b9c8bda52728e226b_mafia.exe	89
PID 5100 wrote to memory of 3552	5100	2025-02-05_08d539c30745d86b9c8bda52728e226b_mafia.exe	89
PID 5100 wrote to memory of 312	5100	2025-02-05_08d539c30745d86b9c8bda52728e226b_mafia.exe	91
PID 5100 wrote to memory of 312	5100	2025-02-05_08d539c30745d86b9c8bda52728e226b_mafia.exe	91
PID 5100 wrote to memory of 312	5100	2025-02-05_08d539c30745d86b9c8bda52728e226b_mafia.exe	91
PID 5100 wrote to memory of 2684	5100	2025-02-05_08d539c30745d86b9c8bda52728e226b_mafia.exe	94
PID 5100 wrote to memory of 2684	5100	2025-02-05_08d539c30745d86b9c8bda52728e226b_mafia.exe	94
PID 5100 wrote to memory of 2684	5100	2025-02-05_08d539c30745d86b9c8bda52728e226b_mafia.exe	94
PID 5100 wrote to memory of 3168	5100	2025-02-05_08d539c30745d86b9c8bda52728e226b_mafia.exe	98
PID 5100 wrote to memory of 3168	5100	2025-02-05_08d539c30745d86b9c8bda52728e226b_mafia.exe	98
PID 5100 wrote to memory of 3168	5100	2025-02-05_08d539c30745d86b9c8bda52728e226b_mafia.exe	98
PID 5100 wrote to memory of 3048	5100	2025-02-05_08d539c30745d86b9c8bda52728e226b_mafia.exe	101
PID 5100 wrote to memory of 3048	5100	2025-02-05_08d539c30745d86b9c8bda52728e226b_mafia.exe	101
PID 5100 wrote to memory of 3048	5100	2025-02-05_08d539c30745d86b9c8bda52728e226b_mafia.exe	101
PID 4568 wrote to memory of 1136	4568	wetxkirr.exe	106
PID 4568 wrote to memory of 1136	4568	wetxkirr.exe	106
PID 4568 wrote to memory of 1136	4568	wetxkirr.exe	106
PID 4568 wrote to memory of 1136	4568	wetxkirr.exe	106
PID 4568 wrote to memory of 1136	4568	wetxkirr.exe	106

C:\Users\Admin\AppData\Local\Temp\2025-02-05_08d539c30745d86b9c8bda52728e226b_mafia.exe
"C:\Users\Admin\AppData\Local\Temp\2025-02-05_08d539c30745d86b9c8bda52728e226b_mafia.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:5100
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\bjoueuny\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4680
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\wetxkirr.exe" C:\Windows\SysWOW64\bjoueuny\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:3552
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create bjoueuny binPath= "C:\Windows\SysWOW64\bjoueuny\wetxkirr.exe /d\"C:\Users\Admin\AppData\Local\Temp\2025-02-05_08d539c30745d86b9c8bda52728e226b_mafia.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:312
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description bjoueuny "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2684
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start bjoueuny
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3168
- 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:3048
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 5100 -s 592
  2⤵
  - Program crash
  PID:4608

C:\Windows\SysWOW64\bjoueuny\wetxkirr.exe
C:\Windows\SysWOW64\bjoueuny\wetxkirr.exe /d"C:\Users\Admin\AppData\Local\Temp\2025-02-05_08d539c30745d86b9c8bda52728e226b_mafia.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4568
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:1136
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4568 -s 520
  2⤵
  - Program crash
  PID:2772

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 5100 -ip 5100
1⤵
PID:2644

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 508 -p 4568 -ip 4568
1⤵
PID:4224

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

System Services

1

T1569

Service Execution

1

T1569.002

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Create or Modify System Process

2

T1543

Windows Service

2

T1543.003

Event Triggered Execution

1

T1546

Netsh Helper DLL

1

T1546.007

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Create or Modify System Process

2

T1543

Windows Service

2

T1543.003

Event Triggered Execution

1

T1546

Netsh Helper DLL

1

T1546.007

Defense Evasion

Impair Defenses

1

T1562

Disable or Modify System Firewall

Modify Registry

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

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

Filesize
11.6MB

MD5
7a7802a8f4688d6008680bf32a95ed4f

SHA1
837b6c6e3ff993f48f0fcae6fba26cca5a4bef7a

SHA256
77904f157195e67c55631b0974e54e3481891fc6a0007aaec946b085be84728a

SHA512
8c4df3639796527ccb7b94e5258a2b5b6c4c691cbd896cc4d9c8d6a58b969b74808263b9eccddf2755f29ebafc4f06ae7bd9cd75d86d4e72c9990ebe0e043ce6

Download Submit
memory/1136-11-0x0000000000CB0000-0x0000000000CC5000-memory.dmp

Filesize
84KB

Download
memory/1136-18-0x0000000000CB0000-0x0000000000CC5000-memory.dmp

Filesize
84KB

Download
memory/1136-19-0x0000000000CB0000-0x0000000000CC5000-memory.dmp

Filesize
84KB

Download
memory/4568-10-0x0000000000400000-0x00000000004C1000-memory.dmp

Filesize
772KB

Download
memory/4568-9-0x0000000000400000-0x00000000004C1000-memory.dmp

Filesize
772KB

Download
memory/4568-8-0x0000000000400000-0x00000000004C1000-memory.dmp

Filesize
772KB

Download
memory/4568-17-0x0000000000400000-0x00000000004C1000-memory.dmp

Filesize
772KB

Download
memory/5100-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/5100-2-0x00000000005E0000-0x00000000005F3000-memory.dmp

Filesize
76KB

Download
memory/5100-1-0x00000000006D0000-0x00000000007D0000-memory.dmp

Filesize
1024KB

Download
memory/5100-13-0x0000000000400000-0x00000000004C1000-memory.dmp

Filesize
772KB

Download
memory/5100-15-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/5100-14-0x00000000005E0000-0x00000000005F3000-memory.dmp

Filesize
76KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads