tofsee | 5163d719cbb762221cd05931f443fbe3212137ba8759d8847ba80aa0825a2f19

General

Target

2025-02-06_5be256baadf55aee357e68335fd616a2_mafia.exe
Size

11.2MB
MD5

5be256baadf55aee357e68335fd616a2
SHA1

7bff3df1121620064e2fe0ad949c68bfe8d3cf3a
SHA256

5163d719cbb762221cd05931f443fbe3212137ba8759d8847ba80aa0825a2f19
SHA512

4e58a2cb7f1f72c0fa3f67f2a4b11375a70ae3ff84190aa82bdc46dc266b1588ce6d65550677844bf05106e7c72f0968edef4fda68521703ac64627100b8797d
SSDEEP

24576:kEfmTNIkv/ZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZU:BfotG

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
2844	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\ogurqiec\ImagePath = "C:\\Windows\\SysWOW64\\ogurqiec\\arnulkos.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-1-5-21-70482961-775596374-3727440602-1000\Control Panel\International\Geo\Nation	2025-02-06_5be256baadf55aee357e68335fd616a2_mafia.exe

Deletes itself 1 IoCs

pid	Process
2132	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2104	arnulkos.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2104 set thread context of 2132	2104	arnulkos.exe	112

Launches sc.exe 3 IoCs

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

pid	Process
5008	sc.exe
2720	sc.exe
392	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
3984	4460	WerFault.exe	83
4888	2104	WerFault.exe	105

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	sc.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	2025-02-06_5be256baadf55aee357e68335fd616a2_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	arnulkos.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 4460 wrote to memory of 1868	4460	2025-02-06_5be256baadf55aee357e68335fd616a2_mafia.exe	94
PID 4460 wrote to memory of 1868	4460	2025-02-06_5be256baadf55aee357e68335fd616a2_mafia.exe	94
PID 4460 wrote to memory of 1868	4460	2025-02-06_5be256baadf55aee357e68335fd616a2_mafia.exe	94
PID 4460 wrote to memory of 556	4460	2025-02-06_5be256baadf55aee357e68335fd616a2_mafia.exe	96
PID 4460 wrote to memory of 556	4460	2025-02-06_5be256baadf55aee357e68335fd616a2_mafia.exe	96
PID 4460 wrote to memory of 556	4460	2025-02-06_5be256baadf55aee357e68335fd616a2_mafia.exe	96
PID 4460 wrote to memory of 392	4460	2025-02-06_5be256baadf55aee357e68335fd616a2_mafia.exe	99
PID 4460 wrote to memory of 392	4460	2025-02-06_5be256baadf55aee357e68335fd616a2_mafia.exe	99
PID 4460 wrote to memory of 392	4460	2025-02-06_5be256baadf55aee357e68335fd616a2_mafia.exe	99
PID 4460 wrote to memory of 5008	4460	2025-02-06_5be256baadf55aee357e68335fd616a2_mafia.exe	101
PID 4460 wrote to memory of 5008	4460	2025-02-06_5be256baadf55aee357e68335fd616a2_mafia.exe	101
PID 4460 wrote to memory of 5008	4460	2025-02-06_5be256baadf55aee357e68335fd616a2_mafia.exe	101
PID 4460 wrote to memory of 2720	4460	2025-02-06_5be256baadf55aee357e68335fd616a2_mafia.exe	103
PID 4460 wrote to memory of 2720	4460	2025-02-06_5be256baadf55aee357e68335fd616a2_mafia.exe	103
PID 4460 wrote to memory of 2720	4460	2025-02-06_5be256baadf55aee357e68335fd616a2_mafia.exe	103
PID 4460 wrote to memory of 2844	4460	2025-02-06_5be256baadf55aee357e68335fd616a2_mafia.exe	106
PID 4460 wrote to memory of 2844	4460	2025-02-06_5be256baadf55aee357e68335fd616a2_mafia.exe	106
PID 4460 wrote to memory of 2844	4460	2025-02-06_5be256baadf55aee357e68335fd616a2_mafia.exe	106
PID 2104 wrote to memory of 2132	2104	arnulkos.exe	112
PID 2104 wrote to memory of 2132	2104	arnulkos.exe	112
PID 2104 wrote to memory of 2132	2104	arnulkos.exe	112
PID 2104 wrote to memory of 2132	2104	arnulkos.exe	112
PID 2104 wrote to memory of 2132	2104	arnulkos.exe	112

C:\Users\Admin\AppData\Local\Temp\2025-02-06_5be256baadf55aee357e68335fd616a2_mafia.exe
"C:\Users\Admin\AppData\Local\Temp\2025-02-06_5be256baadf55aee357e68335fd616a2_mafia.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4460
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\ogurqiec\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:1868
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\arnulkos.exe" C:\Windows\SysWOW64\ogurqiec\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:556
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create ogurqiec binPath= "C:\Windows\SysWOW64\ogurqiec\arnulkos.exe /d\"C:\Users\Admin\AppData\Local\Temp\2025-02-06_5be256baadf55aee357e68335fd616a2_mafia.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:392
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description ogurqiec "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:5008
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start ogurqiec
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2720
- 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:2844
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4460 -s 652
  2⤵
  - Program crash
  PID:3984

C:\Windows\SysWOW64\ogurqiec\arnulkos.exe
C:\Windows\SysWOW64\ogurqiec\arnulkos.exe /d"C:\Users\Admin\AppData\Local\Temp\2025-02-06_5be256baadf55aee357e68335fd616a2_mafia.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2104
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:2132
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2104 -s 512
  2⤵
  - Program crash
  PID:4888

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 472 -p 4460 -ip 4460
1⤵
PID:2628

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 560 -p 2104 -ip 2104
1⤵
PID:3044

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\arnulkos.exe

Filesize
10.4MB

MD5
49580485a93c242cbaeb16427652122d

SHA1
800fe11deb1af80ed994e687fafa85c8b69222e2

SHA256
eba0a1708f5dcfa19e15678c5e139ddcfc0ba0fe1621ead828fadb1f37b412d2

SHA512
09f9765b12e7bafeab1826f0c6605e75c878b4db3c29f620cba65ef27ead17d1ac3f0d9ff276bb0c93a9a3fda75b234e770296387d7084a32487bc0b75cdab06

Download Submit
memory/2104-13-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/2104-12-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/2104-11-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/2104-19-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/2132-14-0x0000000001240000-0x0000000001255000-memory.dmp

Filesize
84KB

Download
memory/2132-16-0x0000000001240000-0x0000000001255000-memory.dmp

Filesize
84KB

Download
memory/2132-17-0x0000000001240000-0x0000000001255000-memory.dmp

Filesize
84KB

Download
memory/4460-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/4460-1-0x00000000007F0000-0x00000000008F0000-memory.dmp

Filesize
1024KB

Download
memory/4460-9-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/4460-7-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/4460-8-0x0000000000780000-0x0000000000793000-memory.dmp

Filesize
76KB

Download
memory/4460-2-0x0000000000780000-0x0000000000793000-memory.dmp

Filesize
76KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads