tofsee | cbbb1a2b296e453e20156852f098abbf68eab45d34f70e7c9145b9aa6670dc03

General

Target

2025-01-24_c1bbb3b802fdd40c32cb724994c93060_mafia.exe
Size

11.7MB
MD5

c1bbb3b802fdd40c32cb724994c93060
SHA1

c5f821e8af30e2ce7b3686418f2702e15b162fcd
SHA256

cbbb1a2b296e453e20156852f098abbf68eab45d34f70e7c9145b9aa6670dc03
SHA512

adc8cc1a8cfc733b163def58ac32a3833210c2828f47bbce0eea7f62103f4f71b38432bd530afa4937d56cc96b205cd811f749abdd381eaf03af153507ed4755
SSDEEP

24576:zEfmTNIkv/ZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZT:gfot

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
1232	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\kudbyssh\ImagePath = "C:\\Windows\\SysWOW64\\kudbyssh\\mrbwqczb.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-1-5-21-3227495264-2217614367-4027411560-1000\Control Panel\International\Geo\Nation	2025-01-24_c1bbb3b802fdd40c32cb724994c93060_mafia.exe

Deletes itself 1 IoCs

pid	Process
3984	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2248	mrbwqczb.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2248 set thread context of 3984	2248	mrbwqczb.exe	100

Launches sc.exe 3 IoCs

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

pid	Process
804	sc.exe
1472	sc.exe
4984	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
4792	1324	WerFault.exe	81
3300	2248	WerFault.exe	92

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	mrbwqczb.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	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2025-01-24_c1bbb3b802fdd40c32cb724994c93060_mafia.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

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 1324 wrote to memory of 3816	1324	2025-01-24_c1bbb3b802fdd40c32cb724994c93060_mafia.exe	82
PID 1324 wrote to memory of 3816	1324	2025-01-24_c1bbb3b802fdd40c32cb724994c93060_mafia.exe	82
PID 1324 wrote to memory of 3816	1324	2025-01-24_c1bbb3b802fdd40c32cb724994c93060_mafia.exe	82
PID 1324 wrote to memory of 4956	1324	2025-01-24_c1bbb3b802fdd40c32cb724994c93060_mafia.exe	84
PID 1324 wrote to memory of 4956	1324	2025-01-24_c1bbb3b802fdd40c32cb724994c93060_mafia.exe	84
PID 1324 wrote to memory of 4956	1324	2025-01-24_c1bbb3b802fdd40c32cb724994c93060_mafia.exe	84
PID 1324 wrote to memory of 804	1324	2025-01-24_c1bbb3b802fdd40c32cb724994c93060_mafia.exe	86
PID 1324 wrote to memory of 804	1324	2025-01-24_c1bbb3b802fdd40c32cb724994c93060_mafia.exe	86
PID 1324 wrote to memory of 804	1324	2025-01-24_c1bbb3b802fdd40c32cb724994c93060_mafia.exe	86
PID 1324 wrote to memory of 1472	1324	2025-01-24_c1bbb3b802fdd40c32cb724994c93060_mafia.exe	88
PID 1324 wrote to memory of 1472	1324	2025-01-24_c1bbb3b802fdd40c32cb724994c93060_mafia.exe	88
PID 1324 wrote to memory of 1472	1324	2025-01-24_c1bbb3b802fdd40c32cb724994c93060_mafia.exe	88
PID 1324 wrote to memory of 4984	1324	2025-01-24_c1bbb3b802fdd40c32cb724994c93060_mafia.exe	90
PID 1324 wrote to memory of 4984	1324	2025-01-24_c1bbb3b802fdd40c32cb724994c93060_mafia.exe	90
PID 1324 wrote to memory of 4984	1324	2025-01-24_c1bbb3b802fdd40c32cb724994c93060_mafia.exe	90
PID 1324 wrote to memory of 1232	1324	2025-01-24_c1bbb3b802fdd40c32cb724994c93060_mafia.exe	93
PID 1324 wrote to memory of 1232	1324	2025-01-24_c1bbb3b802fdd40c32cb724994c93060_mafia.exe	93
PID 1324 wrote to memory of 1232	1324	2025-01-24_c1bbb3b802fdd40c32cb724994c93060_mafia.exe	93
PID 2248 wrote to memory of 3984	2248	mrbwqczb.exe	100
PID 2248 wrote to memory of 3984	2248	mrbwqczb.exe	100
PID 2248 wrote to memory of 3984	2248	mrbwqczb.exe	100
PID 2248 wrote to memory of 3984	2248	mrbwqczb.exe	100
PID 2248 wrote to memory of 3984	2248	mrbwqczb.exe	100

C:\Users\Admin\AppData\Local\Temp\2025-01-24_c1bbb3b802fdd40c32cb724994c93060_mafia.exe
"C:\Users\Admin\AppData\Local\Temp\2025-01-24_c1bbb3b802fdd40c32cb724994c93060_mafia.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1324
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\kudbyssh\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:3816
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\mrbwqczb.exe" C:\Windows\SysWOW64\kudbyssh\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4956
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create kudbyssh binPath= "C:\Windows\SysWOW64\kudbyssh\mrbwqczb.exe /d\"C:\Users\Admin\AppData\Local\Temp\2025-01-24_c1bbb3b802fdd40c32cb724994c93060_mafia.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:804
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description kudbyssh "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:1472
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start kudbyssh
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4984
- 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:1232
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1324 -s 1036
  2⤵
  - Program crash
  PID:4792

C:\Windows\SysWOW64\kudbyssh\mrbwqczb.exe
C:\Windows\SysWOW64\kudbyssh\mrbwqczb.exe /d"C:\Users\Admin\AppData\Local\Temp\2025-01-24_c1bbb3b802fdd40c32cb724994c93060_mafia.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2248
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:3984
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2248 -s 512
  2⤵
  - Program crash
  PID:3300

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 440 -p 1324 -ip 1324
1⤵
PID:2724

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 404 -p 2248 -ip 2248
1⤵
PID:4760

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\mrbwqczb.exe

Filesize
13.2MB

MD5
9be51dfadd9a635e582bf0d947bb1864

SHA1
226ccbe24ebe68972cc7d69fdb7dcb9547876cbc

SHA256
c761eb4177b1ed45aaf804ef992391f7bdd87fc1c952c44f2855e0e094a0f856

SHA512
7dec83e08f01276a51fe9f902f0c567180c9a9a1a2519454fede87c2da2748bf8dde72734153a12d5f0fefc2349c091714807e3bef0f74946eeae4dfb726a22a

Download Submit
memory/1324-8-0x0000000000580000-0x0000000000593000-memory.dmp

Filesize
76KB

Download
memory/1324-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/1324-2-0x0000000000580000-0x0000000000593000-memory.dmp

Filesize
76KB

Download
memory/1324-7-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/1324-9-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/1324-1-0x00000000005E0000-0x00000000006E0000-memory.dmp

Filesize
1024KB

Download
memory/2248-11-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/2248-13-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/2248-12-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/2248-18-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/3984-14-0x0000000000EB0000-0x0000000000EC5000-memory.dmp

Filesize
84KB

Download
memory/3984-16-0x0000000000EB0000-0x0000000000EC5000-memory.dmp

Filesize
84KB

Download
memory/3984-17-0x0000000000EB0000-0x0000000000EC5000-memory.dmp

Filesize
84KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads