tofsee | eea5783e34bf11bf604738c01add12403b0d73c324f5b145add17f62c5c2991a

General

Target

2025-01-15_a4472f9906d22488791d8b513663ba12_mafia.exe
Size

11.4MB
MD5

a4472f9906d22488791d8b513663ba12
SHA1

e49d5755dc9c6edeb25ee9198ca43f849a750bc0
SHA256

eea5783e34bf11bf604738c01add12403b0d73c324f5b145add17f62c5c2991a
SHA512

3ec1675be1c941f66a33a37de1be738f29ca608cd739d02036da25071177e1a45b73d3d76854929b6f90386211650b274099bbdda004c1d1f06250e52ef24716
SSDEEP

6144:tLQ1p/2p5e+D2jFHO+iZoy6u9FlfrXEz9NQNQNQNQNQNQNQNQNQNQNQNQNQNQNQ:+TYe+D2jFu+iZoUFhAz

Score

10^/10

tofsee discovery evasion 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

evasion

Windows Service

T1543.003

Disable or Modify System Firewall

T1562.004

pid	Process
4544	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\zwjcyncn\ImagePath = "C:\\Windows\\SysWOW64\\zwjcyncn\\ljstcynj.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-1-5-21-3442511616-637977696-3186306149-1000\Control Panel\International\Geo\Nation	2025-01-15_a4472f9906d22488791d8b513663ba12_mafia.exe

Deletes itself 1 IoCs

pid	Process
4812	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
1128	ljstcynj.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1128 set thread context of 4812	1128	ljstcynj.exe	96

Launches sc.exe 3 IoCs

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

pid	Process
4036	sc.exe
4360	sc.exe
3600	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
4584	1128	WerFault.exe	92
3468	3512	WerFault.exe	81

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	netsh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2025-01-15_a4472f9906d22488791d8b513663ba12_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	ljstcynj.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 3512 wrote to memory of 4184	3512	2025-01-15_a4472f9906d22488791d8b513663ba12_mafia.exe	82
PID 3512 wrote to memory of 4184	3512	2025-01-15_a4472f9906d22488791d8b513663ba12_mafia.exe	82
PID 3512 wrote to memory of 4184	3512	2025-01-15_a4472f9906d22488791d8b513663ba12_mafia.exe	82
PID 3512 wrote to memory of 2952	3512	2025-01-15_a4472f9906d22488791d8b513663ba12_mafia.exe	84
PID 3512 wrote to memory of 2952	3512	2025-01-15_a4472f9906d22488791d8b513663ba12_mafia.exe	84
PID 3512 wrote to memory of 2952	3512	2025-01-15_a4472f9906d22488791d8b513663ba12_mafia.exe	84
PID 3512 wrote to memory of 4360	3512	2025-01-15_a4472f9906d22488791d8b513663ba12_mafia.exe	86
PID 3512 wrote to memory of 4360	3512	2025-01-15_a4472f9906d22488791d8b513663ba12_mafia.exe	86
PID 3512 wrote to memory of 4360	3512	2025-01-15_a4472f9906d22488791d8b513663ba12_mafia.exe	86
PID 3512 wrote to memory of 3600	3512	2025-01-15_a4472f9906d22488791d8b513663ba12_mafia.exe	88
PID 3512 wrote to memory of 3600	3512	2025-01-15_a4472f9906d22488791d8b513663ba12_mafia.exe	88
PID 3512 wrote to memory of 3600	3512	2025-01-15_a4472f9906d22488791d8b513663ba12_mafia.exe	88
PID 3512 wrote to memory of 4036	3512	2025-01-15_a4472f9906d22488791d8b513663ba12_mafia.exe	90
PID 3512 wrote to memory of 4036	3512	2025-01-15_a4472f9906d22488791d8b513663ba12_mafia.exe	90
PID 3512 wrote to memory of 4036	3512	2025-01-15_a4472f9906d22488791d8b513663ba12_mafia.exe	90
PID 3512 wrote to memory of 4544	3512	2025-01-15_a4472f9906d22488791d8b513663ba12_mafia.exe	93
PID 3512 wrote to memory of 4544	3512	2025-01-15_a4472f9906d22488791d8b513663ba12_mafia.exe	93
PID 3512 wrote to memory of 4544	3512	2025-01-15_a4472f9906d22488791d8b513663ba12_mafia.exe	93
PID 1128 wrote to memory of 4812	1128	ljstcynj.exe	96
PID 1128 wrote to memory of 4812	1128	ljstcynj.exe	96
PID 1128 wrote to memory of 4812	1128	ljstcynj.exe	96
PID 1128 wrote to memory of 4812	1128	ljstcynj.exe	96
PID 1128 wrote to memory of 4812	1128	ljstcynj.exe	96

C:\Users\Admin\AppData\Local\Temp\2025-01-15_a4472f9906d22488791d8b513663ba12_mafia.exe
"C:\Users\Admin\AppData\Local\Temp\2025-01-15_a4472f9906d22488791d8b513663ba12_mafia.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3512
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\zwjcyncn\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4184
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\ljstcynj.exe" C:\Windows\SysWOW64\zwjcyncn\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2952
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create zwjcyncn binPath= "C:\Windows\SysWOW64\zwjcyncn\ljstcynj.exe /d\"C:\Users\Admin\AppData\Local\Temp\2025-01-15_a4472f9906d22488791d8b513663ba12_mafia.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4360
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description zwjcyncn "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3600
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start zwjcyncn
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4036
- 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:4544
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3512 -s 1244
  2⤵
  - Program crash
  PID:3468

C:\Windows\SysWOW64\zwjcyncn\ljstcynj.exe
C:\Windows\SysWOW64\zwjcyncn\ljstcynj.exe /d"C:\Users\Admin\AppData\Local\Temp\2025-01-15_a4472f9906d22488791d8b513663ba12_mafia.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1128
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:4812
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1128 -s 512
  2⤵
  - Program crash
  PID:4584

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 472 -p 3512 -ip 3512
1⤵
PID:2384

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 452 -p 1128 -ip 1128
1⤵
PID:4028

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

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\ljstcynj.exe

Filesize
13.0MB

MD5
6fbeb0dec8552e3c51e44f4033ce6749

SHA1
144d56d69097b25d450f5c4cf94a7e7984671068

SHA256
c503acd42131f90051d5b678ec6b1240f34c890dae8068a51e9d83a3bd190527

SHA512
43a3b9051726b237d5a9f9f7b74fa0d4e0d4557543f034278f4d76bef989d607db71aca18399ec23a42f72ec1378ec5c8fe39a92910d92be20aa35e67b1abe4c

Download Submit
memory/1128-8-0x0000000000400000-0x00000000004C1000-memory.dmp

Filesize
772KB

Download
memory/1128-15-0x0000000000400000-0x00000000004C1000-memory.dmp

Filesize
772KB

Download
memory/1128-9-0x0000000000400000-0x00000000004C1000-memory.dmp

Filesize
772KB

Download
memory/3512-16-0x0000000000400000-0x00000000004C1000-memory.dmp

Filesize
772KB

Download
memory/3512-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/3512-2-0x0000000000510000-0x0000000000523000-memory.dmp

Filesize
76KB

Download
memory/3512-1-0x00000000005D0000-0x00000000006D0000-memory.dmp

Filesize
1024KB

Download
memory/3512-18-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/3512-17-0x0000000000510000-0x0000000000523000-memory.dmp

Filesize
76KB

Download
memory/4812-10-0x00000000008A0000-0x00000000008B5000-memory.dmp

Filesize
84KB

Download
memory/4812-13-0x00000000008A0000-0x00000000008B5000-memory.dmp

Filesize
84KB

Download
memory/4812-19-0x00000000008A0000-0x00000000008B5000-memory.dmp

Filesize
84KB

Download
memory/4812-20-0x00000000008A0000-0x00000000008B5000-memory.dmp

Filesize
84KB

Download
memory/4812-21-0x00000000008A0000-0x00000000008B5000-memory.dmp

Filesize
84KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads