tofsee | efe191b41e57d2fec261f7f1884ec74b27b93785f604b4fe20a2185352f3e0a3

Analysis

max time kernel
144s
max time network
118s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
31-12-2024 19:15

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General

Target

2024-12-31_8da83671c70dd3418c8a12e7ce843a1f_mafia.exe
Size

14.7MB
MD5

8da83671c70dd3418c8a12e7ce843a1f
SHA1

017fde4f6b60921dde0ccd17a3430d3216103b59
SHA256

efe191b41e57d2fec261f7f1884ec74b27b93785f604b4fe20a2185352f3e0a3
SHA512

168780b8fb2d37cf4beaeb7229bcdd872129c02e1cc32d485684528bab4f263c2e96da02d79710d41b0f72a572a50d4557b2a33dec023cdd1ce174e86ea00541
SSDEEP

3072:4LBgXOXcdW8tar7vGdq8c7YMl2b8anmMXnb58XuDP9het3Zv1oSW1za2E+w5C2/Y:1OMdRQr7OB0ypmMXnl8XEPM3noSWOC

Score

10^/10

tofsee discovery evasion 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

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\fewelyjv = "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

evasion

Windows Service

T1543.003

Disable or Modify System Firewall

T1562.004

pid	Process
2124	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\fewelyjv\ImagePath = "C:\\Windows\\SysWOW64\\fewelyjv\\toskalnl.exe"	svchost.exe

Deletes itself 1 IoCs

pid	Process
2832	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2792	toskalnl.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2792 set thread context of 2832	2792	toskalnl.exe	41

Launches sc.exe 3 IoCs

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

pid	Process
2464	sc.exe
2424	sc.exe
2808	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	sc.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	2024-12-31_8da83671c70dd3418c8a12e7ce843a1f_mafia.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	toskalnl.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 3004 wrote to memory of 2536	3004	2024-12-31_8da83671c70dd3418c8a12e7ce843a1f_mafia.exe	30
PID 3004 wrote to memory of 2536	3004	2024-12-31_8da83671c70dd3418c8a12e7ce843a1f_mafia.exe	30
PID 3004 wrote to memory of 2536	3004	2024-12-31_8da83671c70dd3418c8a12e7ce843a1f_mafia.exe	30
PID 3004 wrote to memory of 2536	3004	2024-12-31_8da83671c70dd3418c8a12e7ce843a1f_mafia.exe	30
PID 3004 wrote to memory of 2404	3004	2024-12-31_8da83671c70dd3418c8a12e7ce843a1f_mafia.exe	32
PID 3004 wrote to memory of 2404	3004	2024-12-31_8da83671c70dd3418c8a12e7ce843a1f_mafia.exe	32
PID 3004 wrote to memory of 2404	3004	2024-12-31_8da83671c70dd3418c8a12e7ce843a1f_mafia.exe	32
PID 3004 wrote to memory of 2404	3004	2024-12-31_8da83671c70dd3418c8a12e7ce843a1f_mafia.exe	32
PID 3004 wrote to memory of 2464	3004	2024-12-31_8da83671c70dd3418c8a12e7ce843a1f_mafia.exe	34
PID 3004 wrote to memory of 2464	3004	2024-12-31_8da83671c70dd3418c8a12e7ce843a1f_mafia.exe	34
PID 3004 wrote to memory of 2464	3004	2024-12-31_8da83671c70dd3418c8a12e7ce843a1f_mafia.exe	34
PID 3004 wrote to memory of 2464	3004	2024-12-31_8da83671c70dd3418c8a12e7ce843a1f_mafia.exe	34
PID 3004 wrote to memory of 2424	3004	2024-12-31_8da83671c70dd3418c8a12e7ce843a1f_mafia.exe	36
PID 3004 wrote to memory of 2424	3004	2024-12-31_8da83671c70dd3418c8a12e7ce843a1f_mafia.exe	36
PID 3004 wrote to memory of 2424	3004	2024-12-31_8da83671c70dd3418c8a12e7ce843a1f_mafia.exe	36
PID 3004 wrote to memory of 2424	3004	2024-12-31_8da83671c70dd3418c8a12e7ce843a1f_mafia.exe	36
PID 3004 wrote to memory of 2808	3004	2024-12-31_8da83671c70dd3418c8a12e7ce843a1f_mafia.exe	38
PID 3004 wrote to memory of 2808	3004	2024-12-31_8da83671c70dd3418c8a12e7ce843a1f_mafia.exe	38
PID 3004 wrote to memory of 2808	3004	2024-12-31_8da83671c70dd3418c8a12e7ce843a1f_mafia.exe	38
PID 3004 wrote to memory of 2808	3004	2024-12-31_8da83671c70dd3418c8a12e7ce843a1f_mafia.exe	38
PID 2792 wrote to memory of 2832	2792	toskalnl.exe	41
PID 2792 wrote to memory of 2832	2792	toskalnl.exe	41
PID 2792 wrote to memory of 2832	2792	toskalnl.exe	41
PID 2792 wrote to memory of 2832	2792	toskalnl.exe	41
PID 2792 wrote to memory of 2832	2792	toskalnl.exe	41
PID 2792 wrote to memory of 2832	2792	toskalnl.exe	41
PID 3004 wrote to memory of 2124	3004	2024-12-31_8da83671c70dd3418c8a12e7ce843a1f_mafia.exe	42
PID 3004 wrote to memory of 2124	3004	2024-12-31_8da83671c70dd3418c8a12e7ce843a1f_mafia.exe	42
PID 3004 wrote to memory of 2124	3004	2024-12-31_8da83671c70dd3418c8a12e7ce843a1f_mafia.exe	42
PID 3004 wrote to memory of 2124	3004	2024-12-31_8da83671c70dd3418c8a12e7ce843a1f_mafia.exe	42

C:\Users\Admin\AppData\Local\Temp\2024-12-31_8da83671c70dd3418c8a12e7ce843a1f_mafia.exe
"C:\Users\Admin\AppData\Local\Temp\2024-12-31_8da83671c70dd3418c8a12e7ce843a1f_mafia.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3004
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\fewelyjv\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2536
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\toskalnl.exe" C:\Windows\SysWOW64\fewelyjv\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2404
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create fewelyjv binPath= "C:\Windows\SysWOW64\fewelyjv\toskalnl.exe /d\"C:\Users\Admin\AppData\Local\Temp\2024-12-31_8da83671c70dd3418c8a12e7ce843a1f_mafia.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2464
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description fewelyjv "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2424
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start fewelyjv
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2808
- 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:2124

C:\Windows\SysWOW64\fewelyjv\toskalnl.exe
C:\Windows\SysWOW64\fewelyjv\toskalnl.exe /d"C:\Users\Admin\AppData\Local\Temp\2024-12-31_8da83671c70dd3418c8a12e7ce843a1f_mafia.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2792
- 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:2832

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\toskalnl.exe

Filesize
14.2MB

MD5
a611edc90f48a3aac406e37d8e30a1b8

SHA1
41a2cb176ef678ea09a1f1d6a1db3ae8015fe853

SHA256
b401fe0cff811ef197b760e276e575601b4c9188599a039b00ca37f7646041ce

SHA512
64347374e2bdb18fbdb8dc3e2aec26369d421749d7b3fd24924ad546cfac9381f6ecdfb2ce9fcc956e201547220f6fe38bf7e04ef5ad409a00ede5f0e39e0258

Download Submit
memory/2792-12-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/2832-8-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download
memory/2832-11-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download
memory/2832-10-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2832-17-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download
memory/2832-18-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download
memory/3004-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/3004-1-0x00000000004D0000-0x00000000005D0000-memory.dmp

Filesize
1024KB

Download
memory/3004-2-0x0000000000020000-0x0000000000033000-memory.dmp

Filesize
76KB

Download
memory/3004-14-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/3004-16-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/3004-15-0x0000000000020000-0x0000000000033000-memory.dmp

Filesize
76KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads