tofsee | 360f1feceab5a16cd0a3a2d955380d613aee482172bcadc1a700248fb62f39c9

General

Target

2025-01-26_59add1cca37057d8d2bf397f9a6c0da7_mafia.exe
Size

14.1MB
MD5

59add1cca37057d8d2bf397f9a6c0da7
SHA1

240a0a464b6184b25b6a3b46f506f65b5545d824
SHA256

360f1feceab5a16cd0a3a2d955380d613aee482172bcadc1a700248fb62f39c9
SHA512

3f03f09e004f1698b4e4691388c44a2c7c0bcecc711f0b4fa0bb8b11a2c8da284cda4053ccffcaa9e0891beed2463f2e246c5d5e4867e29eaab96aa15422b88c
SSDEEP

24576:rEfmTNIkv/ZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZR:4fot

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
3536	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\gobdynwb\ImagePath = "C:\\Windows\\SysWOW64\\gobdynwb\\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-1-5-21-2437139445-1151884604-3026847218-1000\Control Panel\International\Geo\Nation	2025-01-26_59add1cca37057d8d2bf397f9a6c0da7_mafia.exe

Deletes itself 1 IoCs

pid	Process
3248	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
3260	yavbuhr.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3260 set thread context of 3248	3260	yavbuhr.exe	108

Launches sc.exe 3 IoCs

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

pid	Process
4344	sc.exe
320	sc.exe
4116	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
4804	4988	WerFault.exe	83
3716	3260	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	netsh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2025-01-26_59add1cca37057d8d2bf397f9a6c0da7_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
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	yavbuhr.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 4988 wrote to memory of 3388	4988	2025-01-26_59add1cca37057d8d2bf397f9a6c0da7_mafia.exe	85
PID 4988 wrote to memory of 3388	4988	2025-01-26_59add1cca37057d8d2bf397f9a6c0da7_mafia.exe	85
PID 4988 wrote to memory of 3388	4988	2025-01-26_59add1cca37057d8d2bf397f9a6c0da7_mafia.exe	85
PID 4988 wrote to memory of 2824	4988	2025-01-26_59add1cca37057d8d2bf397f9a6c0da7_mafia.exe	87
PID 4988 wrote to memory of 2824	4988	2025-01-26_59add1cca37057d8d2bf397f9a6c0da7_mafia.exe	87
PID 4988 wrote to memory of 2824	4988	2025-01-26_59add1cca37057d8d2bf397f9a6c0da7_mafia.exe	87
PID 4988 wrote to memory of 4344	4988	2025-01-26_59add1cca37057d8d2bf397f9a6c0da7_mafia.exe	89
PID 4988 wrote to memory of 4344	4988	2025-01-26_59add1cca37057d8d2bf397f9a6c0da7_mafia.exe	89
PID 4988 wrote to memory of 4344	4988	2025-01-26_59add1cca37057d8d2bf397f9a6c0da7_mafia.exe	89
PID 4988 wrote to memory of 320	4988	2025-01-26_59add1cca37057d8d2bf397f9a6c0da7_mafia.exe	91
PID 4988 wrote to memory of 320	4988	2025-01-26_59add1cca37057d8d2bf397f9a6c0da7_mafia.exe	91
PID 4988 wrote to memory of 320	4988	2025-01-26_59add1cca37057d8d2bf397f9a6c0da7_mafia.exe	91
PID 4988 wrote to memory of 4116	4988	2025-01-26_59add1cca37057d8d2bf397f9a6c0da7_mafia.exe	93
PID 4988 wrote to memory of 4116	4988	2025-01-26_59add1cca37057d8d2bf397f9a6c0da7_mafia.exe	93
PID 4988 wrote to memory of 4116	4988	2025-01-26_59add1cca37057d8d2bf397f9a6c0da7_mafia.exe	93
PID 4988 wrote to memory of 3536	4988	2025-01-26_59add1cca37057d8d2bf397f9a6c0da7_mafia.exe	96
PID 4988 wrote to memory of 3536	4988	2025-01-26_59add1cca37057d8d2bf397f9a6c0da7_mafia.exe	96
PID 4988 wrote to memory of 3536	4988	2025-01-26_59add1cca37057d8d2bf397f9a6c0da7_mafia.exe	96
PID 3260 wrote to memory of 3248	3260	yavbuhr.exe	108
PID 3260 wrote to memory of 3248	3260	yavbuhr.exe	108
PID 3260 wrote to memory of 3248	3260	yavbuhr.exe	108
PID 3260 wrote to memory of 3248	3260	yavbuhr.exe	108
PID 3260 wrote to memory of 3248	3260	yavbuhr.exe	108

C:\Users\Admin\AppData\Local\Temp\2025-01-26_59add1cca37057d8d2bf397f9a6c0da7_mafia.exe
"C:\Users\Admin\AppData\Local\Temp\2025-01-26_59add1cca37057d8d2bf397f9a6c0da7_mafia.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4988
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\gobdynwb\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:3388
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\yavbuhr.exe" C:\Windows\SysWOW64\gobdynwb\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2824
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create gobdynwb binPath= "C:\Windows\SysWOW64\gobdynwb\yavbuhr.exe /d\"C:\Users\Admin\AppData\Local\Temp\2025-01-26_59add1cca37057d8d2bf397f9a6c0da7_mafia.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4344
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description gobdynwb "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:320
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start gobdynwb
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4116
- 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:3536
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4988 -s 676
  2⤵
  - Program crash
  PID:4804

C:\Windows\SysWOW64\gobdynwb\yavbuhr.exe
C:\Windows\SysWOW64\gobdynwb\yavbuhr.exe /d"C:\Users\Admin\AppData\Local\Temp\2025-01-26_59add1cca37057d8d2bf397f9a6c0da7_mafia.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3260
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:3248
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3260 -s 512
  2⤵
  - Program crash
  PID:3716

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 440 -p 4988 -ip 4988
1⤵
PID:3300

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 528 -p 3260 -ip 3260
1⤵
PID:4068

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
12.4MB

MD5
a65d99d502048386b184dfa71319407e

SHA1
c48f51aabdf2955e5c8577c1836ab206647ed4b2

SHA256
a80e1082ab7f82c3689fafa518a702bb9c18300bbbef3bd044964fcf3b063908

SHA512
2d9e3c8e092b3ad2d8b3387bc962ee57bdda5543bbf20dd6067fcd69c79d0ab4d0357ad07d9cc69ca0fc9f870d7afedacf3a2847e474f00bfde3d51c69ca2ad7

Download Submit
memory/3248-14-0x0000000000BA0000-0x0000000000BB5000-memory.dmp

Filesize
84KB

Download
memory/3248-17-0x0000000000BA0000-0x0000000000BB5000-memory.dmp

Filesize
84KB

Download
memory/3248-16-0x0000000000BA0000-0x0000000000BB5000-memory.dmp

Filesize
84KB

Download
memory/3260-13-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/3260-11-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/3260-12-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/3260-18-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/4988-9-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/4988-8-0x0000000000490000-0x00000000004A3000-memory.dmp

Filesize
76KB

Download
memory/4988-1-0x00000000006B0000-0x00000000007B0000-memory.dmp

Filesize
1024KB

Download
memory/4988-7-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/4988-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/4988-2-0x0000000000490000-0x00000000004A3000-memory.dmp

Filesize
76KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads