tofsee | 94871a96c6d6fb66be233acb65d6f6de8bed474500a18071174b75d8eaff3971

Analysis

max time kernel
145s
max time network
122s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
05-02-2025 17:30

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General

Target

2025-02-05_bbfcd3ad74dc8c29d82d24e4d52c5f45_mafia.exe
Size

12.9MB
MD5

bbfcd3ad74dc8c29d82d24e4d52c5f45
SHA1

8801850748535f0406395ab864a20c3ee04cf464
SHA256

94871a96c6d6fb66be233acb65d6f6de8bed474500a18071174b75d8eaff3971
SHA512

3e8aa772814cb8edb2973db7243fcfbe609cf1b2fc2d9449df237f5fa3ea673cc948c54a67df1fbe5f6054c4607c668335a48aeecc575da04ca0ec8bbc19be33
SSDEEP

49152:XqE0YKr3fYPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPb:XqtYc3q

Score

10^/10

tofsee defense_evasion discovery execution persistence privilege_escalation trojan

Malware Config

Extracted

Family

tofsee

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

Windows security bypass 2 TTPs 1 IoCs

defense_evasion trojan

Disable or Modify Tools

T1562.001

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths\C:\Windows\SysWOW64\eddwngfr = "0"	svchost.exe

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
2828	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\eddwngfr\ImagePath = "C:\\Windows\\SysWOW64\\eddwngfr\\arnulkos.exe"	svchost.exe

Deletes itself 1 IoCs

pid	Process
2604	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2868	arnulkos.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2868 set thread context of 2604	2868	arnulkos.exe	41

Launches sc.exe 3 IoCs

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

pid	Process
2816	sc.exe
1964	sc.exe
2280	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

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	arnulkos.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	netsh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2025-02-05_bbfcd3ad74dc8c29d82d24e4d52c5f45_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	sc.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 2192 wrote to memory of 2352	2192	2025-02-05_bbfcd3ad74dc8c29d82d24e4d52c5f45_mafia.exe	30
PID 2192 wrote to memory of 2352	2192	2025-02-05_bbfcd3ad74dc8c29d82d24e4d52c5f45_mafia.exe	30
PID 2192 wrote to memory of 2352	2192	2025-02-05_bbfcd3ad74dc8c29d82d24e4d52c5f45_mafia.exe	30
PID 2192 wrote to memory of 2352	2192	2025-02-05_bbfcd3ad74dc8c29d82d24e4d52c5f45_mafia.exe	30
PID 2192 wrote to memory of 2516	2192	2025-02-05_bbfcd3ad74dc8c29d82d24e4d52c5f45_mafia.exe	32
PID 2192 wrote to memory of 2516	2192	2025-02-05_bbfcd3ad74dc8c29d82d24e4d52c5f45_mafia.exe	32
PID 2192 wrote to memory of 2516	2192	2025-02-05_bbfcd3ad74dc8c29d82d24e4d52c5f45_mafia.exe	32
PID 2192 wrote to memory of 2516	2192	2025-02-05_bbfcd3ad74dc8c29d82d24e4d52c5f45_mafia.exe	32
PID 2192 wrote to memory of 1964	2192	2025-02-05_bbfcd3ad74dc8c29d82d24e4d52c5f45_mafia.exe	34
PID 2192 wrote to memory of 1964	2192	2025-02-05_bbfcd3ad74dc8c29d82d24e4d52c5f45_mafia.exe	34
PID 2192 wrote to memory of 1964	2192	2025-02-05_bbfcd3ad74dc8c29d82d24e4d52c5f45_mafia.exe	34
PID 2192 wrote to memory of 1964	2192	2025-02-05_bbfcd3ad74dc8c29d82d24e4d52c5f45_mafia.exe	34
PID 2192 wrote to memory of 2280	2192	2025-02-05_bbfcd3ad74dc8c29d82d24e4d52c5f45_mafia.exe	36
PID 2192 wrote to memory of 2280	2192	2025-02-05_bbfcd3ad74dc8c29d82d24e4d52c5f45_mafia.exe	36
PID 2192 wrote to memory of 2280	2192	2025-02-05_bbfcd3ad74dc8c29d82d24e4d52c5f45_mafia.exe	36
PID 2192 wrote to memory of 2280	2192	2025-02-05_bbfcd3ad74dc8c29d82d24e4d52c5f45_mafia.exe	36
PID 2192 wrote to memory of 2816	2192	2025-02-05_bbfcd3ad74dc8c29d82d24e4d52c5f45_mafia.exe	38
PID 2192 wrote to memory of 2816	2192	2025-02-05_bbfcd3ad74dc8c29d82d24e4d52c5f45_mafia.exe	38
PID 2192 wrote to memory of 2816	2192	2025-02-05_bbfcd3ad74dc8c29d82d24e4d52c5f45_mafia.exe	38
PID 2192 wrote to memory of 2816	2192	2025-02-05_bbfcd3ad74dc8c29d82d24e4d52c5f45_mafia.exe	38
PID 2868 wrote to memory of 2604	2868	arnulkos.exe	41
PID 2868 wrote to memory of 2604	2868	arnulkos.exe	41
PID 2868 wrote to memory of 2604	2868	arnulkos.exe	41
PID 2868 wrote to memory of 2604	2868	arnulkos.exe	41
PID 2868 wrote to memory of 2604	2868	arnulkos.exe	41
PID 2868 wrote to memory of 2604	2868	arnulkos.exe	41
PID 2192 wrote to memory of 2828	2192	2025-02-05_bbfcd3ad74dc8c29d82d24e4d52c5f45_mafia.exe	42
PID 2192 wrote to memory of 2828	2192	2025-02-05_bbfcd3ad74dc8c29d82d24e4d52c5f45_mafia.exe	42
PID 2192 wrote to memory of 2828	2192	2025-02-05_bbfcd3ad74dc8c29d82d24e4d52c5f45_mafia.exe	42
PID 2192 wrote to memory of 2828	2192	2025-02-05_bbfcd3ad74dc8c29d82d24e4d52c5f45_mafia.exe	42

C:\Users\Admin\AppData\Local\Temp\2025-02-05_bbfcd3ad74dc8c29d82d24e4d52c5f45_mafia.exe
"C:\Users\Admin\AppData\Local\Temp\2025-02-05_bbfcd3ad74dc8c29d82d24e4d52c5f45_mafia.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2192
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\eddwngfr\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2352
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\arnulkos.exe" C:\Windows\SysWOW64\eddwngfr\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2516
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create eddwngfr binPath= "C:\Windows\SysWOW64\eddwngfr\arnulkos.exe /d\"C:\Users\Admin\AppData\Local\Temp\2025-02-05_bbfcd3ad74dc8c29d82d24e4d52c5f45_mafia.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:1964
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description eddwngfr "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2280
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start eddwngfr
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2816
- 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:2828

C:\Windows\SysWOW64\eddwngfr\arnulkos.exe
C:\Windows\SysWOW64\eddwngfr\arnulkos.exe /d"C:\Users\Admin\AppData\Local\Temp\2025-02-05_bbfcd3ad74dc8c29d82d24e4d52c5f45_mafia.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2868
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Windows security bypass
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:2604

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

System Services

T1569

Service Execution

T1569.002

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Create or Modify System Process

T1543

Windows Service

T1543.003

Event Triggered Execution

T1546

Netsh Helper DLL

T1546.007

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Create or Modify System Process

T1543

Windows Service

T1543.003

Event Triggered Execution

T1546

Netsh Helper DLL

T1546.007

Defense Evasion

Impair Defenses

T1562

Disable or Modify System Firewall

T1562.004

Disable or Modify Tools

T1562.001

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

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

Filesize
14.7MB

MD5
2035251c28dec2e325ebb42cdfb2408a

SHA1
95170eea87b6b12c415556d6ea974c73820132ce

SHA256
6cac72db1a2792a23f51fb865fd2fac2cc3e717f849bdf41953cf557dfdbd43b

SHA512
566b081ee242bde6bbea47b6195fcb63bed41ce2e4ac35713042eb2400897e84e7aba6bff498c4be419606ec9152f5782b8154827b97a44d7f1c7945c1295703

Download Submit
memory/2192-2-0x0000000000400000-0x0000000002DC3000-memory.dmp

Filesize
41.8MB

Download
memory/2192-3-0x0000000000400000-0x0000000002DC3000-memory.dmp

Filesize
41.8MB

Download
memory/2192-14-0x0000000000400000-0x0000000002DC3000-memory.dmp

Filesize
41.8MB

Download
memory/2604-7-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2604-10-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2604-9-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2604-15-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2604-16-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2868-12-0x0000000000400000-0x0000000002DC3000-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