tofsee | 9242bfe755391afaabf0437648bd1d1219bfe22a3a9cc38aa400b8e586207d8e

General

Target

2024092155677129c3ec9b078fca74e0042b7667mafia.exe
Size

12.0MB
MD5

55677129c3ec9b078fca74e0042b7667
SHA1

0f316608d3481f66b6be8defcee658022220bb61
SHA256

9242bfe755391afaabf0437648bd1d1219bfe22a3a9cc38aa400b8e586207d8e
SHA512

ce397f4fdc64387094fba86c9a10c487dbf66a88e15e0aaf19cc98eec28f8e8b3b7b0ec2a5816b39f1524609636457a5ab719dfb9affd2904eb317e0eb8d24fe
SSDEEP

6144:c+rWO2zeSPDjMXMH7Ll4aFpWVqIwUAP97GEwHrG2+e1x2:c+r1IeSXMXc7LlxWV4Ug97GZ+ej

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

Windows security bypass 2 TTPs 1 IoCs

evasion trojan

Disable or Modify Tools

T1562.001

Modify Registry

T1112

Processes:

svchost.exe

description	ioc	process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths\C:\Windows\SysWOW64\kjrynsia = "0"	svchost.exe

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

Processes:

netsh.exe

pid process

2644 netsh.exe

pid	process
2644	netsh.exe

Sets service image path in registry 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

svchost.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\kjrynsia\ImagePath = "C:\\Windows\\SysWOW64\\kjrynsia\\nwonwimd.exe"	svchost.exe

Deletes itself 1 IoCs

Processes:

svchost.exe

pid process

2568 svchost.exe
Executes dropped EXE 1 IoCs

Processes:

nwonwimd.exe

pid process

2736 nwonwimd.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

nwonwimd.exe

description pid process target process

PID 2736 set thread context of 2568 2736 nwonwimd.exe svchost.exe
Launches sc.exe 3 IoCs
Sc.exe is a Windows utlilty to control services on the system.

Processes:

sc.exesc.exesc.exe

pid process

2732 sc.exe
2828 sc.exe
2704 sc.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
2568	svchost.exe

pid	process
2736	nwonwimd.exe

description	pid	process	target process
PID 2736 set thread context of 2568	2736	nwonwimd.exe	svchost.exe

pid	process
2732	sc.exe
2828	sc.exe
2704	sc.exe

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

Processes:

netsh.exe

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

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

Processes:

2024092155677129c3ec9b078fca74e0042b7667mafia.execmd.exesc.exesc.execmd.exesc.exenwonwimd.exenetsh.exesvchost.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2024092155677129c3ec9b078fca74e0042b7667mafia.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	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	nwonwimd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	netsh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe

Suspicious use of WriteProcessMemory 30 IoCs

Processes:

2024092155677129c3ec9b078fca74e0042b7667mafia.exenwonwimd.exe

description	pid	process	target process
PID 2092 wrote to memory of 2720	2092	2024092155677129c3ec9b078fca74e0042b7667mafia.exe	cmd.exe
PID 2092 wrote to memory of 2720	2092	2024092155677129c3ec9b078fca74e0042b7667mafia.exe	cmd.exe
PID 2092 wrote to memory of 2720	2092	2024092155677129c3ec9b078fca74e0042b7667mafia.exe	cmd.exe
PID 2092 wrote to memory of 2720	2092	2024092155677129c3ec9b078fca74e0042b7667mafia.exe	cmd.exe
PID 2092 wrote to memory of 2840	2092	2024092155677129c3ec9b078fca74e0042b7667mafia.exe	cmd.exe
PID 2092 wrote to memory of 2840	2092	2024092155677129c3ec9b078fca74e0042b7667mafia.exe	cmd.exe
PID 2092 wrote to memory of 2840	2092	2024092155677129c3ec9b078fca74e0042b7667mafia.exe	cmd.exe
PID 2092 wrote to memory of 2840	2092	2024092155677129c3ec9b078fca74e0042b7667mafia.exe	cmd.exe
PID 2092 wrote to memory of 2704	2092	2024092155677129c3ec9b078fca74e0042b7667mafia.exe	sc.exe
PID 2092 wrote to memory of 2704	2092	2024092155677129c3ec9b078fca74e0042b7667mafia.exe	sc.exe
PID 2092 wrote to memory of 2704	2092	2024092155677129c3ec9b078fca74e0042b7667mafia.exe	sc.exe
PID 2092 wrote to memory of 2704	2092	2024092155677129c3ec9b078fca74e0042b7667mafia.exe	sc.exe
PID 2092 wrote to memory of 2732	2092	2024092155677129c3ec9b078fca74e0042b7667mafia.exe	sc.exe
PID 2092 wrote to memory of 2732	2092	2024092155677129c3ec9b078fca74e0042b7667mafia.exe	sc.exe
PID 2092 wrote to memory of 2732	2092	2024092155677129c3ec9b078fca74e0042b7667mafia.exe	sc.exe
PID 2092 wrote to memory of 2732	2092	2024092155677129c3ec9b078fca74e0042b7667mafia.exe	sc.exe
PID 2092 wrote to memory of 2828	2092	2024092155677129c3ec9b078fca74e0042b7667mafia.exe	sc.exe
PID 2092 wrote to memory of 2828	2092	2024092155677129c3ec9b078fca74e0042b7667mafia.exe	sc.exe
PID 2092 wrote to memory of 2828	2092	2024092155677129c3ec9b078fca74e0042b7667mafia.exe	sc.exe
PID 2092 wrote to memory of 2828	2092	2024092155677129c3ec9b078fca74e0042b7667mafia.exe	sc.exe
PID 2736 wrote to memory of 2568	2736	nwonwimd.exe	svchost.exe
PID 2736 wrote to memory of 2568	2736	nwonwimd.exe	svchost.exe
PID 2736 wrote to memory of 2568	2736	nwonwimd.exe	svchost.exe
PID 2736 wrote to memory of 2568	2736	nwonwimd.exe	svchost.exe
PID 2736 wrote to memory of 2568	2736	nwonwimd.exe	svchost.exe
PID 2736 wrote to memory of 2568	2736	nwonwimd.exe	svchost.exe
PID 2092 wrote to memory of 2644	2092	2024092155677129c3ec9b078fca74e0042b7667mafia.exe	netsh.exe
PID 2092 wrote to memory of 2644	2092	2024092155677129c3ec9b078fca74e0042b7667mafia.exe	netsh.exe
PID 2092 wrote to memory of 2644	2092	2024092155677129c3ec9b078fca74e0042b7667mafia.exe	netsh.exe
PID 2092 wrote to memory of 2644	2092	2024092155677129c3ec9b078fca74e0042b7667mafia.exe	netsh.exe

C:\Users\Admin\AppData\Local\Temp\2024092155677129c3ec9b078fca74e0042b7667mafia.exe
"C:\Users\Admin\AppData\Local\Temp\2024092155677129c3ec9b078fca74e0042b7667mafia.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2092
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\kjrynsia\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2720
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\nwonwimd.exe" C:\Windows\SysWOW64\kjrynsia\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2840
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create kjrynsia binPath= "C:\Windows\SysWOW64\kjrynsia\nwonwimd.exe /d\"C:\Users\Admin\AppData\Local\Temp\2024092155677129c3ec9b078fca74e0042b7667mafia.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2704
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description kjrynsia "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2732
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start kjrynsia
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2828
- 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:2644

C:\Windows\SysWOW64\kjrynsia\nwonwimd.exe
C:\Windows\SysWOW64\kjrynsia\nwonwimd.exe /d"C:\Users\Admin\AppData\Local\Temp\2024092155677129c3ec9b078fca74e0042b7667mafia.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2736
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Windows security bypass
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:2568

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

2

T1562

Disable or Modify System Firewall

1

T1562.004

Disable or Modify Tools

Modify Registry

Credential Access

Discovery

System Information Discovery

1

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\nwonwimd.exe

Filesize
10.6MB

MD5
7cbfddc17ea9420d76641cc0f2ba3bd1

SHA1
80db676e4c61d9224b2b64ec643af3fbfc81dfed

SHA256
3b62820269f42c3c99aec793ea9b80f13b91056f99e7b665958722b6abf993c8

SHA512
83ee85828e900c7749be63c341d7bf3f045eb992b3b4625a1f7d56e778dafd22ba354658aeaaea7455619ebd848b4bfcd217a0a36ee6ec4dee258e8ab925eb37

Download Submit
memory/2092-1-0x00000000005C0000-0x00000000006C0000-memory.dmp

Filesize
1024KB

Download
memory/2092-2-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2092-13-0x0000000000400000-0x000000000051A000-memory.dmp

Filesize
1.1MB

Download
memory/2092-15-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2092-14-0x00000000005C0000-0x00000000006C0000-memory.dmp

Filesize
1024KB

Download
memory/2568-10-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2568-9-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2568-7-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2568-16-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2568-17-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2736-12-0x0000000000400000-0x000000000051A000-memory.dmp

Filesize
1.1MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads