tofsee | cb91e1fdec2e73cac56f31d34efe5f8ce8612d83d6478a57eb5a8fa0acce3acd

General

Target

2025-01-24_7c90e1699a20035eb73f3dc5d0ea3132_mafia.exe
Size

11.5MB
MD5

7c90e1699a20035eb73f3dc5d0ea3132
SHA1

bd217fc8671a899c3e20e6c53b483b69359be720
SHA256

cb91e1fdec2e73cac56f31d34efe5f8ce8612d83d6478a57eb5a8fa0acce3acd
SHA512

b5ad5003b6744b58696789cbe41a23f2b64c09cccbb085d93685b29edf715927ff467d872e0b819d42567c6770293442b205e60d41f181441a6e3f6e50b74f70
SSDEEP

3072:8LBgXOXcdW8tar7vGdq8c7YMl2b8anmMXnb58XuDP9het3Zv1oSW1za2E+w5C2/Y:ZOMdRQr7OB0ypmMXnl8XEPM3noSWOC

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
4388	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\zvbcawan\ImagePath = "C:\\Windows\\SysWOW64\\zvbcawan\\fkupjvsu.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-1-5-21-493223053-2004649691-1575712786-1000\Control Panel\International\Geo\Nation	2025-01-24_7c90e1699a20035eb73f3dc5d0ea3132_mafia.exe

Deletes itself 1 IoCs

pid	Process
1900	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
4844	fkupjvsu.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4844 set thread context of 1900	4844	fkupjvsu.exe	109

Launches sc.exe 3 IoCs

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

pid	Process
4804	sc.exe
2848	sc.exe
1048	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
4728	2100	WerFault.exe	83
3832	4844	WerFault.exe	97

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	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	netsh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	fkupjvsu.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	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2025-01-24_7c90e1699a20035eb73f3dc5d0ea3132_mafia.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 2100 wrote to memory of 4724	2100	2025-01-24_7c90e1699a20035eb73f3dc5d0ea3132_mafia.exe	85
PID 2100 wrote to memory of 4724	2100	2025-01-24_7c90e1699a20035eb73f3dc5d0ea3132_mafia.exe	85
PID 2100 wrote to memory of 4724	2100	2025-01-24_7c90e1699a20035eb73f3dc5d0ea3132_mafia.exe	85
PID 2100 wrote to memory of 3352	2100	2025-01-24_7c90e1699a20035eb73f3dc5d0ea3132_mafia.exe	87
PID 2100 wrote to memory of 3352	2100	2025-01-24_7c90e1699a20035eb73f3dc5d0ea3132_mafia.exe	87
PID 2100 wrote to memory of 3352	2100	2025-01-24_7c90e1699a20035eb73f3dc5d0ea3132_mafia.exe	87
PID 2100 wrote to memory of 2848	2100	2025-01-24_7c90e1699a20035eb73f3dc5d0ea3132_mafia.exe	89
PID 2100 wrote to memory of 2848	2100	2025-01-24_7c90e1699a20035eb73f3dc5d0ea3132_mafia.exe	89
PID 2100 wrote to memory of 2848	2100	2025-01-24_7c90e1699a20035eb73f3dc5d0ea3132_mafia.exe	89
PID 2100 wrote to memory of 1048	2100	2025-01-24_7c90e1699a20035eb73f3dc5d0ea3132_mafia.exe	91
PID 2100 wrote to memory of 1048	2100	2025-01-24_7c90e1699a20035eb73f3dc5d0ea3132_mafia.exe	91
PID 2100 wrote to memory of 1048	2100	2025-01-24_7c90e1699a20035eb73f3dc5d0ea3132_mafia.exe	91
PID 2100 wrote to memory of 4804	2100	2025-01-24_7c90e1699a20035eb73f3dc5d0ea3132_mafia.exe	95
PID 2100 wrote to memory of 4804	2100	2025-01-24_7c90e1699a20035eb73f3dc5d0ea3132_mafia.exe	95
PID 2100 wrote to memory of 4804	2100	2025-01-24_7c90e1699a20035eb73f3dc5d0ea3132_mafia.exe	95
PID 2100 wrote to memory of 4388	2100	2025-01-24_7c90e1699a20035eb73f3dc5d0ea3132_mafia.exe	98
PID 2100 wrote to memory of 4388	2100	2025-01-24_7c90e1699a20035eb73f3dc5d0ea3132_mafia.exe	98
PID 2100 wrote to memory of 4388	2100	2025-01-24_7c90e1699a20035eb73f3dc5d0ea3132_mafia.exe	98
PID 4844 wrote to memory of 1900	4844	fkupjvsu.exe	109
PID 4844 wrote to memory of 1900	4844	fkupjvsu.exe	109
PID 4844 wrote to memory of 1900	4844	fkupjvsu.exe	109
PID 4844 wrote to memory of 1900	4844	fkupjvsu.exe	109
PID 4844 wrote to memory of 1900	4844	fkupjvsu.exe	109

C:\Users\Admin\AppData\Local\Temp\2025-01-24_7c90e1699a20035eb73f3dc5d0ea3132_mafia.exe
"C:\Users\Admin\AppData\Local\Temp\2025-01-24_7c90e1699a20035eb73f3dc5d0ea3132_mafia.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2100
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\zvbcawan\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4724
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\fkupjvsu.exe" C:\Windows\SysWOW64\zvbcawan\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:3352
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create zvbcawan binPath= "C:\Windows\SysWOW64\zvbcawan\fkupjvsu.exe /d\"C:\Users\Admin\AppData\Local\Temp\2025-01-24_7c90e1699a20035eb73f3dc5d0ea3132_mafia.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2848
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description zvbcawan "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:1048
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start zvbcawan
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4804
- 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:4388
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2100 -s 1252
  2⤵
  - Program crash
  PID:4728

C:\Windows\SysWOW64\zvbcawan\fkupjvsu.exe
C:\Windows\SysWOW64\zvbcawan\fkupjvsu.exe /d"C:\Users\Admin\AppData\Local\Temp\2025-01-24_7c90e1699a20035eb73f3dc5d0ea3132_mafia.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4844
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:1900
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4844 -s 556
  2⤵
  - Program crash
  PID:3832

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 404 -p 2100 -ip 2100
1⤵
PID:2916

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 476 -p 4844 -ip 4844
1⤵
PID:4912

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\fkupjvsu.exe

Filesize
13.0MB

MD5
1d7ab04792e07201e6a5441f4ed11dae

SHA1
99fb8db8aa04cc6f0ffdb8826ccf7771b75a5d7b

SHA256
03afb073bd0bf6ecacdc998e03ae42b6ddcbf87d6c3ece249d257a59e6940ae4

SHA512
484de0ca292d739fac674b206f12931ad08abb89c842c330e652371428daf076bcf55672128f7308a70acce98cf8d0eef83b751b95ced0a0c53b85cc6a07362f

Download Submit
memory/1900-14-0x0000000000C80000-0x0000000000C95000-memory.dmp

Filesize
84KB

Download
memory/1900-17-0x0000000000C80000-0x0000000000C95000-memory.dmp

Filesize
84KB

Download
memory/1900-16-0x0000000000C80000-0x0000000000C95000-memory.dmp

Filesize
84KB

Download
memory/2100-8-0x00000000004A0000-0x00000000004B3000-memory.dmp

Filesize
76KB

Download
memory/2100-9-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2100-1-0x0000000000550000-0x0000000000650000-memory.dmp

Filesize
1024KB

Download
memory/2100-7-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/2100-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2100-2-0x00000000004A0000-0x00000000004B3000-memory.dmp

Filesize
76KB

Download
memory/4844-12-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/4844-11-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/4844-13-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/4844-19-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads