tofsee | b0bdf6212ea9483d04f5ad47a0d4af05f379eeddbee38b13627ad921af336bf3

Analysis

max time kernel
142s
max time network
143s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
31/12/2024, 18:52

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General

Target
2024-12-31_041bff40cf772c28086f2136218489f2_mafia.exe
Size 11.3MB
Sample241231-xjdqdswngr
SHA256 b0bdf6212ea9483d04f5ad47a0d4af05f379eeddbee38b13627ad921af336bf3
MD5 041bff40cf772c28086f2136218489f2
SHA1 a933c80b433a90b7985599f6d7b4a498cf2c75d7
SHA512 77c8cf466a70b5ff5545d2fe997b48c84f090f3e63c48ed9df087c5bbf76d00f2132a3173fd792caee7c12621adafd08fddb72631d11025edcc2204d15cf39c5
SSDEEP 3072:RLBgXOXcdW8tar7vGdq8c7YMl2b8anmMXnb58XuDP9het3Zv1oSW1za2E+w5C2/Y:UOMdRQr7OB0ypmMXnl8XEPM3noSWOC
MD5 SHA1 SHA512 SSDEEP

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
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
436	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\rmtktpfl\ImagePath = "C:\\Windows\\SysWOW64\\rmtktpfl\\lcyfwvzd.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-1-5-21-493223053-2004649691-1575712786-1000\Control Panel\International\Geo\Nation	2024-12-31_041bff40cf772c28086f2136218489f2_mafia.exe

Deletes itself 1 IoCs

pid	Process
4360	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
236	lcyfwvzd.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 236 set thread context of 4360	236	lcyfwvzd.exe	108

Launches sc.exe 3 IoCs

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

pid	Process
2312	sc.exe
3016	sc.exe
5064	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
2632	2372	WerFault.exe	84
3448	236	WerFault.exe	95

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	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	lcyfwvzd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2024-12-31_041bff40cf772c28086f2136218489f2_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	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 2372 wrote to memory of 1772	2372	2024-12-31_041bff40cf772c28086f2136218489f2_mafia.exe	85
PID 2372 wrote to memory of 1772	2372	2024-12-31_041bff40cf772c28086f2136218489f2_mafia.exe	85
PID 2372 wrote to memory of 1772	2372	2024-12-31_041bff40cf772c28086f2136218489f2_mafia.exe	85
PID 2372 wrote to memory of 2100	2372	2024-12-31_041bff40cf772c28086f2136218489f2_mafia.exe	87
PID 2372 wrote to memory of 2100	2372	2024-12-31_041bff40cf772c28086f2136218489f2_mafia.exe	87
PID 2372 wrote to memory of 2100	2372	2024-12-31_041bff40cf772c28086f2136218489f2_mafia.exe	87
PID 2372 wrote to memory of 2312	2372	2024-12-31_041bff40cf772c28086f2136218489f2_mafia.exe	89
PID 2372 wrote to memory of 2312	2372	2024-12-31_041bff40cf772c28086f2136218489f2_mafia.exe	89
PID 2372 wrote to memory of 2312	2372	2024-12-31_041bff40cf772c28086f2136218489f2_mafia.exe	89
PID 2372 wrote to memory of 3016	2372	2024-12-31_041bff40cf772c28086f2136218489f2_mafia.exe	91
PID 2372 wrote to memory of 3016	2372	2024-12-31_041bff40cf772c28086f2136218489f2_mafia.exe	91
PID 2372 wrote to memory of 3016	2372	2024-12-31_041bff40cf772c28086f2136218489f2_mafia.exe	91
PID 2372 wrote to memory of 5064	2372	2024-12-31_041bff40cf772c28086f2136218489f2_mafia.exe	93
PID 2372 wrote to memory of 5064	2372	2024-12-31_041bff40cf772c28086f2136218489f2_mafia.exe	93
PID 2372 wrote to memory of 5064	2372	2024-12-31_041bff40cf772c28086f2136218489f2_mafia.exe	93
PID 2372 wrote to memory of 436	2372	2024-12-31_041bff40cf772c28086f2136218489f2_mafia.exe	96
PID 2372 wrote to memory of 436	2372	2024-12-31_041bff40cf772c28086f2136218489f2_mafia.exe	96
PID 2372 wrote to memory of 436	2372	2024-12-31_041bff40cf772c28086f2136218489f2_mafia.exe	96
PID 236 wrote to memory of 4360	236	lcyfwvzd.exe	108
PID 236 wrote to memory of 4360	236	lcyfwvzd.exe	108
PID 236 wrote to memory of 4360	236	lcyfwvzd.exe	108
PID 236 wrote to memory of 4360	236	lcyfwvzd.exe	108
PID 236 wrote to memory of 4360	236	lcyfwvzd.exe	108

C:\Users\Admin\AppData\Local\Temp\2024-12-31_041bff40cf772c28086f2136218489f2_mafia.exe
"C:\Users\Admin\AppData\Local\Temp\2024-12-31_041bff40cf772c28086f2136218489f2_mafia.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2372
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\rmtktpfl\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:1772
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\lcyfwvzd.exe" C:\Windows\SysWOW64\rmtktpfl\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2100
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create rmtktpfl binPath= "C:\Windows\SysWOW64\rmtktpfl\lcyfwvzd.exe /d\"C:\Users\Admin\AppData\Local\Temp\2024-12-31_041bff40cf772c28086f2136218489f2_mafia.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2312
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description rmtktpfl "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3016
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start rmtktpfl
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:5064
- 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:436
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2372 -s 1236
  2⤵
  - Program crash
  PID:2632

C:\Windows\SysWOW64\rmtktpfl\lcyfwvzd.exe
C:\Windows\SysWOW64\rmtktpfl\lcyfwvzd.exe /d"C:\Users\Admin\AppData\Local\Temp\2024-12-31_041bff40cf772c28086f2136218489f2_mafia.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:236
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:4360
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 236 -s 512
  2⤵
  - Program crash
  PID:3448

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 2372 -ip 2372
1⤵
PID:2104

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 472 -p 236 -ip 236
1⤵
PID:792

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

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

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

lcyfwvzd.exe

Path C:\Users\Admin\AppData\Local\Temp\lcyfwvzd.exe
Size 12.2MB
SHA256 5c1f382a30eafc9bdf499350e33f26105b95c2fa672f12912a23fc7f6b99f8be
MD5 4f21aef6d5da58131167e9d914cd0e29
SHA1 6e74d0422013030c57b97014afc5a08f26370fd9
SHA512 fb74b1375b59643f67c76bc6fb1ec97c279b67e0ca0869411128f165872c08a5ae1814fdcd8e28cc0edb5728a990d75d9c302fa25980521d7f34917b5f0d4fdc
SSDEEP 3072:GLBgXOXcdW8tar7vGdq8c7YMl2b8anmMXnb58XuDP9het3Zv1oSW1za2E+w5C2/Y:vOMdRQr7OB0ypmMXnl8XEPM3noSWOC
MD5 SHA1 SHA512 SSDEEP

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memory/236-13-0x0000000000400000-0x000000000044E000-memory.dmp

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memory/236-11-0x0000000000400000-0x000000000044E000-memory.dmp

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memory/236-12-0x0000000000400000-0x000000000044E000-memory.dmp

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memory/236-18-0x0000000000400000-0x000000000044E000-memory.dmp

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memory/2372-3-0x0000000000400000-0x0000000000415000-memory.dmp

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memory/2372-2-0x0000000000620000-0x0000000000633000-memory.dmp

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memory/2372-7-0x0000000000400000-0x000000000044E000-memory.dmp

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memory/2372-8-0x0000000000620000-0x0000000000633000-memory.dmp

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memory/2372-9-0x0000000000400000-0x0000000000415000-memory.dmp

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memory/2372-1-0x00000000007E0000-0x00000000008E0000-memory.dmp

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memory/4360-14-0x00000000009B0000-0x00000000009C5000-memory.dmp

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memory/4360-16-0x00000000009B0000-0x00000000009C5000-memory.dmp

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memory/4360-17-0x00000000009B0000-0x00000000009C5000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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