tofsee | 706db912c2f5d76634e6f9e898a906d510426e90ec4b643a1eda4b202a318959

General

Target

2025-02-03_7839d6068fb9f3f0af05f14adef96870_mafia.exe
Size

10.2MB
MD5

7839d6068fb9f3f0af05f14adef96870
SHA1

0c384f1331520979438f97a4157685e1cdd80a04
SHA256

706db912c2f5d76634e6f9e898a906d510426e90ec4b643a1eda4b202a318959
SHA512

693aba90675d99b68bb320d761337f2bd7fa8fd9f4bc98c5f450fb1a0c9ad66360e3e73f2789ce2c6d3a3ac7221743da4a9ecb81c9bc4340ba78de2fb14c7237
SSDEEP

24576:3EfmTNIkv/ZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZv:Ufot

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
1464	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\znmttlyt\ImagePath = "C:\\Windows\\SysWOW64\\znmttlyt\\yavbuhr.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-1-5-21-4174397412-4125106315-2776226590-1000\Control Panel\International\Geo\Nation	2025-02-03_7839d6068fb9f3f0af05f14adef96870_mafia.exe

Deletes itself 1 IoCs

pid	Process
3144	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
3872	yavbuhr.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3872 set thread context of 3144	3872	yavbuhr.exe	105

Launches sc.exe 3 IoCs

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

pid	Process
5024	sc.exe
4388	sc.exe
3028	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
4592	1512	WerFault.exe	83
2240	3872	WerFault.exe	99

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	2025-02-03_7839d6068fb9f3f0af05f14adef96870_mafia.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	netsh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	yavbuhr.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
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	sc.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 1512 wrote to memory of 4412	1512	2025-02-03_7839d6068fb9f3f0af05f14adef96870_mafia.exe	89
PID 1512 wrote to memory of 4412	1512	2025-02-03_7839d6068fb9f3f0af05f14adef96870_mafia.exe	89
PID 1512 wrote to memory of 4412	1512	2025-02-03_7839d6068fb9f3f0af05f14adef96870_mafia.exe	89
PID 1512 wrote to memory of 2656	1512	2025-02-03_7839d6068fb9f3f0af05f14adef96870_mafia.exe	91
PID 1512 wrote to memory of 2656	1512	2025-02-03_7839d6068fb9f3f0af05f14adef96870_mafia.exe	91
PID 1512 wrote to memory of 2656	1512	2025-02-03_7839d6068fb9f3f0af05f14adef96870_mafia.exe	91
PID 1512 wrote to memory of 5024	1512	2025-02-03_7839d6068fb9f3f0af05f14adef96870_mafia.exe	93
PID 1512 wrote to memory of 5024	1512	2025-02-03_7839d6068fb9f3f0af05f14adef96870_mafia.exe	93
PID 1512 wrote to memory of 5024	1512	2025-02-03_7839d6068fb9f3f0af05f14adef96870_mafia.exe	93
PID 1512 wrote to memory of 4388	1512	2025-02-03_7839d6068fb9f3f0af05f14adef96870_mafia.exe	95
PID 1512 wrote to memory of 4388	1512	2025-02-03_7839d6068fb9f3f0af05f14adef96870_mafia.exe	95
PID 1512 wrote to memory of 4388	1512	2025-02-03_7839d6068fb9f3f0af05f14adef96870_mafia.exe	95
PID 1512 wrote to memory of 3028	1512	2025-02-03_7839d6068fb9f3f0af05f14adef96870_mafia.exe	97
PID 1512 wrote to memory of 3028	1512	2025-02-03_7839d6068fb9f3f0af05f14adef96870_mafia.exe	97
PID 1512 wrote to memory of 3028	1512	2025-02-03_7839d6068fb9f3f0af05f14adef96870_mafia.exe	97
PID 1512 wrote to memory of 1464	1512	2025-02-03_7839d6068fb9f3f0af05f14adef96870_mafia.exe	100
PID 1512 wrote to memory of 1464	1512	2025-02-03_7839d6068fb9f3f0af05f14adef96870_mafia.exe	100
PID 1512 wrote to memory of 1464	1512	2025-02-03_7839d6068fb9f3f0af05f14adef96870_mafia.exe	100
PID 3872 wrote to memory of 3144	3872	yavbuhr.exe	105
PID 3872 wrote to memory of 3144	3872	yavbuhr.exe	105
PID 3872 wrote to memory of 3144	3872	yavbuhr.exe	105
PID 3872 wrote to memory of 3144	3872	yavbuhr.exe	105
PID 3872 wrote to memory of 3144	3872	yavbuhr.exe	105

C:\Users\Admin\AppData\Local\Temp\2025-02-03_7839d6068fb9f3f0af05f14adef96870_mafia.exe
"C:\Users\Admin\AppData\Local\Temp\2025-02-03_7839d6068fb9f3f0af05f14adef96870_mafia.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1512
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\znmttlyt\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4412
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\yavbuhr.exe" C:\Windows\SysWOW64\znmttlyt\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2656
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create znmttlyt binPath= "C:\Windows\SysWOW64\znmttlyt\yavbuhr.exe /d\"C:\Users\Admin\AppData\Local\Temp\2025-02-03_7839d6068fb9f3f0af05f14adef96870_mafia.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:5024
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description znmttlyt "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4388
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start znmttlyt
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3028
- 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:1464
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1512 -s 1200
  2⤵
  - Program crash
  PID:4592

C:\Windows\SysWOW64\znmttlyt\yavbuhr.exe
C:\Windows\SysWOW64\znmttlyt\yavbuhr.exe /d"C:\Users\Admin\AppData\Local\Temp\2025-02-03_7839d6068fb9f3f0af05f14adef96870_mafia.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3872
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:3144
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3872 -s 508
  2⤵
  - Program crash
  PID:2240

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 456 -p 1512 -ip 1512
1⤵
PID:1676

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 532 -p 3872 -ip 3872
1⤵
PID:4360

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\yavbuhr.exe

Filesize
10.5MB

MD5
54cb18a60ec21a3a0ee5b62433c6da03

SHA1
d5d0de6421e3aab84c37933fc0d5c7eba612efbc

SHA256
b2f3f04921104020d25cdf32080b919f783b7a194ac233c7e7250be1dcdf01b9

SHA512
8c713b85f7bb730a2ef14b10d5860f078bf786a917fe3a96bbb7569f70e9654455a0e37da2a54924ee06cba444034801937e5ad4ccf4d348930b249c0e986f68

Download Submit
memory/1512-7-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/1512-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/1512-1-0x0000000000500000-0x0000000000600000-memory.dmp

Filesize
1024KB

Download
memory/1512-8-0x0000000000490000-0x00000000004A3000-memory.dmp

Filesize
76KB

Download
memory/1512-9-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/1512-2-0x0000000000490000-0x00000000004A3000-memory.dmp

Filesize
76KB

Download
memory/3144-13-0x0000000000AC0000-0x0000000000AD5000-memory.dmp

Filesize
84KB

Download
memory/3144-15-0x0000000000AC0000-0x0000000000AD5000-memory.dmp

Filesize
84KB

Download
memory/3144-16-0x0000000000AC0000-0x0000000000AD5000-memory.dmp

Filesize
84KB

Download
memory/3872-11-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/3872-12-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/3872-17-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads