tofsee | 9965d42357361bba917eeeaaefc632514b424626b965ea69d8c2523c70de681b

General

Target

2025-01-18_991f4a42ff851f8b3363db9251d39ea2_mafia.exe
Size

11.8MB
MD5

991f4a42ff851f8b3363db9251d39ea2
SHA1

cfc4f31a7e136b93081c4ce0c7eb013e3b56a8b7
SHA256

9965d42357361bba917eeeaaefc632514b424626b965ea69d8c2523c70de681b
SHA512

87d7c5cc0a3897674950a0c0ded324cf8b61cff5ecb1419e295f8081c7e660e8a82832ae0e30ceaf1a9b11630e1b706697291c1c9f63d3b1200147934b118585
SSDEEP

49152:lqE0YKr3fYPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPP:lqtYc3

Score

10^/10

tofsee discovery evasion 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

evasion

Windows Service

T1543.003

Disable or Modify System Firewall

T1562.004

pid	Process
4176	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\njcrdijf\ImagePath = "C:\\Windows\\SysWOW64\\njcrdijf\\fesuifgy.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-1-5-21-3350944739-639801879-157714471-1000\Control Panel\International\Geo\Nation	2025-01-18_991f4a42ff851f8b3363db9251d39ea2_mafia.exe

Deletes itself 1 IoCs

pid	Process
452	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
1176	fesuifgy.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1176 set thread context of 452	1176	fesuifgy.exe	95

Launches sc.exe 3 IoCs

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

pid	Process
2340	sc.exe
2976	sc.exe
1248	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
4644	4816	WerFault.exe	82
4980	1176	WerFault.exe	94

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	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2025-01-18_991f4a42ff851f8b3363db9251d39ea2_mafia.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	fesuifgy.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	netsh.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 4816 wrote to memory of 5032	4816	2025-01-18_991f4a42ff851f8b3363db9251d39ea2_mafia.exe	83
PID 4816 wrote to memory of 5032	4816	2025-01-18_991f4a42ff851f8b3363db9251d39ea2_mafia.exe	83
PID 4816 wrote to memory of 5032	4816	2025-01-18_991f4a42ff851f8b3363db9251d39ea2_mafia.exe	83
PID 4816 wrote to memory of 3300	4816	2025-01-18_991f4a42ff851f8b3363db9251d39ea2_mafia.exe	85
PID 4816 wrote to memory of 3300	4816	2025-01-18_991f4a42ff851f8b3363db9251d39ea2_mafia.exe	85
PID 4816 wrote to memory of 3300	4816	2025-01-18_991f4a42ff851f8b3363db9251d39ea2_mafia.exe	85
PID 4816 wrote to memory of 2340	4816	2025-01-18_991f4a42ff851f8b3363db9251d39ea2_mafia.exe	87
PID 4816 wrote to memory of 2340	4816	2025-01-18_991f4a42ff851f8b3363db9251d39ea2_mafia.exe	87
PID 4816 wrote to memory of 2340	4816	2025-01-18_991f4a42ff851f8b3363db9251d39ea2_mafia.exe	87
PID 4816 wrote to memory of 2976	4816	2025-01-18_991f4a42ff851f8b3363db9251d39ea2_mafia.exe	89
PID 4816 wrote to memory of 2976	4816	2025-01-18_991f4a42ff851f8b3363db9251d39ea2_mafia.exe	89
PID 4816 wrote to memory of 2976	4816	2025-01-18_991f4a42ff851f8b3363db9251d39ea2_mafia.exe	89
PID 4816 wrote to memory of 1248	4816	2025-01-18_991f4a42ff851f8b3363db9251d39ea2_mafia.exe	92
PID 4816 wrote to memory of 1248	4816	2025-01-18_991f4a42ff851f8b3363db9251d39ea2_mafia.exe	92
PID 4816 wrote to memory of 1248	4816	2025-01-18_991f4a42ff851f8b3363db9251d39ea2_mafia.exe	92
PID 1176 wrote to memory of 452	1176	fesuifgy.exe	95
PID 1176 wrote to memory of 452	1176	fesuifgy.exe	95
PID 1176 wrote to memory of 452	1176	fesuifgy.exe	95
PID 1176 wrote to memory of 452	1176	fesuifgy.exe	95
PID 1176 wrote to memory of 452	1176	fesuifgy.exe	95
PID 4816 wrote to memory of 4176	4816	2025-01-18_991f4a42ff851f8b3363db9251d39ea2_mafia.exe	98
PID 4816 wrote to memory of 4176	4816	2025-01-18_991f4a42ff851f8b3363db9251d39ea2_mafia.exe	98
PID 4816 wrote to memory of 4176	4816	2025-01-18_991f4a42ff851f8b3363db9251d39ea2_mafia.exe	98

C:\Users\Admin\AppData\Local\Temp\2025-01-18_991f4a42ff851f8b3363db9251d39ea2_mafia.exe
"C:\Users\Admin\AppData\Local\Temp\2025-01-18_991f4a42ff851f8b3363db9251d39ea2_mafia.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4816
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\njcrdijf\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:5032
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\fesuifgy.exe" C:\Windows\SysWOW64\njcrdijf\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:3300
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create njcrdijf binPath= "C:\Windows\SysWOW64\njcrdijf\fesuifgy.exe /d\"C:\Users\Admin\AppData\Local\Temp\2025-01-18_991f4a42ff851f8b3363db9251d39ea2_mafia.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2340
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description njcrdijf "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2976
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start njcrdijf
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:1248
- 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:4176
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4816 -s 1184
  2⤵
  - Program crash
  PID:4644

C:\Windows\SysWOW64\njcrdijf\fesuifgy.exe
C:\Windows\SysWOW64\njcrdijf\fesuifgy.exe /d"C:\Users\Admin\AppData\Local\Temp\2025-01-18_991f4a42ff851f8b3363db9251d39ea2_mafia.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1176
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:452
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1176 -s 520
  2⤵
  - Program crash
  PID:4980

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 452 -p 1176 -ip 1176
1⤵
PID:1876

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 468 -p 4816 -ip 4816
1⤵
PID:3668

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\fesuifgy.exe

Filesize
14.9MB

MD5
99f65f4ddb8945e8854021f9c2a0dbff

SHA1
a0325383e78ca77b58844b4d8d5a4036a8a66b25

SHA256
f24de00dd0f21f382fb42034498b688fde16a4c6de14d2f9cb94bbeab1f89bd7

SHA512
f3ca13ed187c34a29fb04581a2bd1f20087eced1baaba565627a53ce705cfea5948a6229dc88834a099d626a2b588e2d1bdab09486a22032893be0e5037a7359

Download Submit
memory/452-8-0x0000000000B10000-0x0000000000B25000-memory.dmp

Filesize
84KB

Download
memory/452-14-0x0000000000B10000-0x0000000000B25000-memory.dmp

Filesize
84KB

Download
memory/452-15-0x0000000000B10000-0x0000000000B25000-memory.dmp

Filesize
84KB

Download
memory/1176-10-0x0000000000400000-0x0000000002DC3000-memory.dmp

Filesize
41.8MB

Download
memory/4816-1-0x0000000002E40000-0x0000000002F40000-memory.dmp

Filesize
1024KB

Download
memory/4816-2-0x0000000003210000-0x0000000003223000-memory.dmp

Filesize
76KB

Download
memory/4816-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/4816-13-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/4816-12-0x0000000003210000-0x0000000003223000-memory.dmp

Filesize
76KB

Download
memory/4816-11-0x0000000000400000-0x0000000002DC3000-memory.dmp

Filesize
41.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads