tofsee | 2ec2ed3e9c0dea7bdd9376559a577b13c1f84a06c158cbe2b7aae4c6ac3f6022

General

Target

2025-02-07_f3bfee5d07fb5cc641baddd6de1c218f_mafia.exe
Size

12.6MB
MD5

f3bfee5d07fb5cc641baddd6de1c218f
SHA1

3eb2d4fd3784dc3769a6a536ea96a0996752f851
SHA256

2ec2ed3e9c0dea7bdd9376559a577b13c1f84a06c158cbe2b7aae4c6ac3f6022
SHA512

0e1a5e887f0f436b3bd019a8c3344930dfa313153f88a7463b202270699581b70884a70c5cd8397fe40929b557757fadbd714315d945611bba0b1d89f6ffd91b
SSDEEP

24576:cEfmTNIkv/ZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZF:Zfot

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

Downloads MZ/PE file 2 IoCs

flow	pid	Process
31	3604	Process not Found
66	228	Process not Found

Modifies Windows Firewall 2 TTPs 1 IoCs

defense_evasion

Windows Service

T1543.003

Disable or Modify System Firewall

T1562.004

pid	Process
3336	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\lynpffhy\ImagePath = "C:\\Windows\\SysWOW64\\lynpffhy\\sunyfnbr.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-1-5-21-2573923862-3221519550-2669654151-1000\Control Panel\International\Geo\Nation	2025-02-07_f3bfee5d07fb5cc641baddd6de1c218f_mafia.exe

Deletes itself 1 IoCs

pid	Process
3276	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2628	sunyfnbr.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2628 set thread context of 3276	2628	sunyfnbr.exe	105

Launches sc.exe 3 IoCs

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

pid	Process
1188	sc.exe
2216	sc.exe
3452	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

Program crash 2 IoCs

pid	pid_target	Process	procid_target
840	1692	WerFault.exe	86
1888	2628	WerFault.exe	99

System Location Discovery: System Language Discovery 1 TTPs 10 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	2025-02-07_f3bfee5d07fb5cc641baddd6de1c218f_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	MicrosoftEdgeUpdate.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sunyfnbr.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	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	netsh.exe

System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 1 IoCs

Adversaries may check for Internet connectivity on compromised systems.

discovery

Internet Connection Discovery

T1016.001

pid	Process
1844	MicrosoftEdgeUpdate.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 1692 wrote to memory of 2348	1692	2025-02-07_f3bfee5d07fb5cc641baddd6de1c218f_mafia.exe	89
PID 1692 wrote to memory of 2348	1692	2025-02-07_f3bfee5d07fb5cc641baddd6de1c218f_mafia.exe	89
PID 1692 wrote to memory of 2348	1692	2025-02-07_f3bfee5d07fb5cc641baddd6de1c218f_mafia.exe	89
PID 1692 wrote to memory of 624	1692	2025-02-07_f3bfee5d07fb5cc641baddd6de1c218f_mafia.exe	91
PID 1692 wrote to memory of 624	1692	2025-02-07_f3bfee5d07fb5cc641baddd6de1c218f_mafia.exe	91
PID 1692 wrote to memory of 624	1692	2025-02-07_f3bfee5d07fb5cc641baddd6de1c218f_mafia.exe	91
PID 1692 wrote to memory of 2216	1692	2025-02-07_f3bfee5d07fb5cc641baddd6de1c218f_mafia.exe	93
PID 1692 wrote to memory of 2216	1692	2025-02-07_f3bfee5d07fb5cc641baddd6de1c218f_mafia.exe	93
PID 1692 wrote to memory of 2216	1692	2025-02-07_f3bfee5d07fb5cc641baddd6de1c218f_mafia.exe	93
PID 1692 wrote to memory of 3452	1692	2025-02-07_f3bfee5d07fb5cc641baddd6de1c218f_mafia.exe	95
PID 1692 wrote to memory of 3452	1692	2025-02-07_f3bfee5d07fb5cc641baddd6de1c218f_mafia.exe	95
PID 1692 wrote to memory of 3452	1692	2025-02-07_f3bfee5d07fb5cc641baddd6de1c218f_mafia.exe	95
PID 1692 wrote to memory of 1188	1692	2025-02-07_f3bfee5d07fb5cc641baddd6de1c218f_mafia.exe	97
PID 1692 wrote to memory of 1188	1692	2025-02-07_f3bfee5d07fb5cc641baddd6de1c218f_mafia.exe	97
PID 1692 wrote to memory of 1188	1692	2025-02-07_f3bfee5d07fb5cc641baddd6de1c218f_mafia.exe	97
PID 1692 wrote to memory of 3336	1692	2025-02-07_f3bfee5d07fb5cc641baddd6de1c218f_mafia.exe	100
PID 1692 wrote to memory of 3336	1692	2025-02-07_f3bfee5d07fb5cc641baddd6de1c218f_mafia.exe	100
PID 1692 wrote to memory of 3336	1692	2025-02-07_f3bfee5d07fb5cc641baddd6de1c218f_mafia.exe	100
PID 2628 wrote to memory of 3276	2628	sunyfnbr.exe	105
PID 2628 wrote to memory of 3276	2628	sunyfnbr.exe	105
PID 2628 wrote to memory of 3276	2628	sunyfnbr.exe	105
PID 2628 wrote to memory of 3276	2628	sunyfnbr.exe	105
PID 2628 wrote to memory of 3276	2628	sunyfnbr.exe	105

C:\Users\Admin\AppData\Local\Temp\2025-02-07_f3bfee5d07fb5cc641baddd6de1c218f_mafia.exe
"C:\Users\Admin\AppData\Local\Temp\2025-02-07_f3bfee5d07fb5cc641baddd6de1c218f_mafia.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1692
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\lynpffhy\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2348
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\sunyfnbr.exe" C:\Windows\SysWOW64\lynpffhy\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:624
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create lynpffhy binPath= "C:\Windows\SysWOW64\lynpffhy\sunyfnbr.exe /d\"C:\Users\Admin\AppData\Local\Temp\2025-02-07_f3bfee5d07fb5cc641baddd6de1c218f_mafia.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2216
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description lynpffhy "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3452
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start lynpffhy
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:1188
- 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:3336
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1692 -s 572
  2⤵
  - Program crash
  PID:840

C:\Windows\SysWOW64\lynpffhy\sunyfnbr.exe
C:\Windows\SysWOW64\lynpffhy\sunyfnbr.exe /d"C:\Users\Admin\AppData\Local\Temp\2025-02-07_f3bfee5d07fb5cc641baddd6de1c218f_mafia.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2628
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:3276
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2628 -s 516
  2⤵
  - Program crash
  PID:1888

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 424 -p 1692 -ip 1692
1⤵
PID:4264

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 176 -p 2628 -ip 2628
1⤵
PID:4892

C:\Program Files (x86)\Microsoft\EdgeUpdate\MicrosoftEdgeUpdate.exe
"C:\Program Files (x86)\Microsoft\EdgeUpdate\MicrosoftEdgeUpdate.exe" /ping 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-PGFwcCBhcHBpZD0iezhBNjlEMzQ1LUQ1NjQtNDYzYy1BRkYxLUE2OUQ5RTUzMEY5Nn0iIHZlcnNpb249IjEyMy4wLjYzMTIuMTIzIiBuZXh0dmVyc2lvbj0iIiBsYW5nPSJlbiIgYnJhbmQ9IkdHTFMiIGNsaWVudD0iIiBpbnN0YWxsYWdlPSIxIiBpbnN0YWxsZGF0ZXRpbWU9IjE3Mzg5NDU4MTUiIG9vYmVfaW5zdGFsbF90aW1lPSIxMzM4MzQxODE1MzQzMTAwMDAiPjxldmVudCBldmVudHR5cGU9IjMxIiBldmVudHJlc3VsdD0iMSIgZXJyb3Jjb2RlPSIwIiBleHRyYWNvZGUxPSIyMTc5ODYyIiBzeXN0ZW1fdXB0aW1lX3RpY2tzPSI1MDE0OTkzOTQ0Ii8-PC9hcHA-PC9yZXF1ZXN0Pg
1⤵
- System Location Discovery: System Language Discovery
- System Network Configuration Discovery: Internet Connection Discovery
PID:1844

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

System Network Configuration Discovery

1

T1016

Internet Connection Discovery

1

T1016.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

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

Filesize
14.3MB

MD5
45d7d524cebc2dec2baa9296edf15392

SHA1
fef055b5a38c4b34fbc72c690d621602dc2bdd70

SHA256
c1c6cedf048510168ecc6aef48ee61556a2ceeab438e13f5c1145a7a5df0eb9b

SHA512
ef841e5772dd94e9ef4f03016b6f0a0cbc145833bc1b37e952fb4e6697aacd61dd21a4b8429b438bd51bb36346e7223490780276cdefd15dbf6262804755ce18

Download Submit
memory/1692-8-0x00000000001C0000-0x00000000001D3000-memory.dmp

Filesize
76KB

Download
memory/1692-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/1692-2-0x00000000001C0000-0x00000000001D3000-memory.dmp

Filesize
76KB

Download
memory/1692-7-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/1692-9-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/1692-1-0x0000000000640000-0x0000000000740000-memory.dmp

Filesize
1024KB

Download
memory/2628-12-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/2628-11-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/2628-13-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/2628-17-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/3276-14-0x00000000005A0000-0x00000000005B5000-memory.dmp

Filesize
84KB

Download
memory/3276-18-0x00000000005A0000-0x00000000005B5000-memory.dmp

Filesize
84KB

Download
memory/3276-16-0x00000000005A0000-0x00000000005B5000-memory.dmp

Filesize
84KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads