tofsee | 6c2b21f0366b3942ae23d428155856a3deedccf6dcd00f3e27652a625455367d

Analysis

max time kernel
149s
max time network
128s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
09-09-2024 15:02

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General

Target

6c2b21f0366b3942ae23d428155856a3deedccf6dcd00f3e27652a625455367d.exe
Size

13.9MB
MD5

38497df5caa858a3e65f3946bb0e28bf
SHA1

2446e498831b099bc15c37c295387e1c049fc702
SHA256

6c2b21f0366b3942ae23d428155856a3deedccf6dcd00f3e27652a625455367d
SHA512

a172f7b7b005a72069cab497a0b3dfb79badf1b899e990c959eb0b830db4a91250c137e8e5fdf74920ca59a2ede93de39a7f85b774fe7342c1f228ab4b15bf86
SSDEEP

12288:KzpKS0FRvqPKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKn:oMS

Score

10^/10

tofsee discovery evasion execution persistence privilege_escalation trojan

Malware Config

Extracted

Family

tofsee

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\jsngpsaf = "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
2756	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\jsngpsaf\ImagePath = "C:\\Windows\\SysWOW64\\jsngpsaf\\yuouacul.exe"	svchost.exe

Deletes itself 1 IoCs

Processes:

svchost.exe

pid	Process
1656	svchost.exe

Executes dropped EXE 1 IoCs

Processes:

yuouacul.exe

pid	Process
2772	yuouacul.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

yuouacul.exe

description	pid	Process	procid_target
PID 2772 set thread context of 1656	2772	yuouacul.exe	43

Launches sc.exe 3 IoCs

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

Processes:

sc.exesc.exesc.exe

pid	Process
2716	sc.exe
2780	sc.exe
2652	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

Processes:

netsh.exe

description	ioc	Process
Key value enumerated	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\NetSh	netsh.exe
Key opened	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\NetSh	netsh.exe
Key queried	\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:

sc.exenetsh.execmd.execmd.exesc.exesc.exeyuouacul.exesvchost.exe6c2b21f0366b3942ae23d428155856a3deedccf6dcd00f3e27652a625455367d.exe

description	ioc	Process
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	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	yuouacul.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	6c2b21f0366b3942ae23d428155856a3deedccf6dcd00f3e27652a625455367d.exe

Suspicious use of WriteProcessMemory 30 IoCs

Processes:

6c2b21f0366b3942ae23d428155856a3deedccf6dcd00f3e27652a625455367d.exeyuouacul.exe

description	pid	Process	procid_target
PID 2992 wrote to memory of 2928	2992	6c2b21f0366b3942ae23d428155856a3deedccf6dcd00f3e27652a625455367d.exe	30
PID 2992 wrote to memory of 2928	2992	6c2b21f0366b3942ae23d428155856a3deedccf6dcd00f3e27652a625455367d.exe	30
PID 2992 wrote to memory of 2928	2992	6c2b21f0366b3942ae23d428155856a3deedccf6dcd00f3e27652a625455367d.exe	30
PID 2992 wrote to memory of 2928	2992	6c2b21f0366b3942ae23d428155856a3deedccf6dcd00f3e27652a625455367d.exe	30
PID 2992 wrote to memory of 2080	2992	6c2b21f0366b3942ae23d428155856a3deedccf6dcd00f3e27652a625455367d.exe	32
PID 2992 wrote to memory of 2080	2992	6c2b21f0366b3942ae23d428155856a3deedccf6dcd00f3e27652a625455367d.exe	32
PID 2992 wrote to memory of 2080	2992	6c2b21f0366b3942ae23d428155856a3deedccf6dcd00f3e27652a625455367d.exe	32
PID 2992 wrote to memory of 2080	2992	6c2b21f0366b3942ae23d428155856a3deedccf6dcd00f3e27652a625455367d.exe	32
PID 2992 wrote to memory of 2716	2992	6c2b21f0366b3942ae23d428155856a3deedccf6dcd00f3e27652a625455367d.exe	34
PID 2992 wrote to memory of 2716	2992	6c2b21f0366b3942ae23d428155856a3deedccf6dcd00f3e27652a625455367d.exe	34
PID 2992 wrote to memory of 2716	2992	6c2b21f0366b3942ae23d428155856a3deedccf6dcd00f3e27652a625455367d.exe	34
PID 2992 wrote to memory of 2716	2992	6c2b21f0366b3942ae23d428155856a3deedccf6dcd00f3e27652a625455367d.exe	34
PID 2992 wrote to memory of 2780	2992	6c2b21f0366b3942ae23d428155856a3deedccf6dcd00f3e27652a625455367d.exe	36
PID 2992 wrote to memory of 2780	2992	6c2b21f0366b3942ae23d428155856a3deedccf6dcd00f3e27652a625455367d.exe	36
PID 2992 wrote to memory of 2780	2992	6c2b21f0366b3942ae23d428155856a3deedccf6dcd00f3e27652a625455367d.exe	36
PID 2992 wrote to memory of 2780	2992	6c2b21f0366b3942ae23d428155856a3deedccf6dcd00f3e27652a625455367d.exe	36
PID 2992 wrote to memory of 2652	2992	6c2b21f0366b3942ae23d428155856a3deedccf6dcd00f3e27652a625455367d.exe	38
PID 2992 wrote to memory of 2652	2992	6c2b21f0366b3942ae23d428155856a3deedccf6dcd00f3e27652a625455367d.exe	38
PID 2992 wrote to memory of 2652	2992	6c2b21f0366b3942ae23d428155856a3deedccf6dcd00f3e27652a625455367d.exe	38
PID 2992 wrote to memory of 2652	2992	6c2b21f0366b3942ae23d428155856a3deedccf6dcd00f3e27652a625455367d.exe	38
PID 2992 wrote to memory of 2756	2992	6c2b21f0366b3942ae23d428155856a3deedccf6dcd00f3e27652a625455367d.exe	40
PID 2992 wrote to memory of 2756	2992	6c2b21f0366b3942ae23d428155856a3deedccf6dcd00f3e27652a625455367d.exe	40
PID 2992 wrote to memory of 2756	2992	6c2b21f0366b3942ae23d428155856a3deedccf6dcd00f3e27652a625455367d.exe	40
PID 2992 wrote to memory of 2756	2992	6c2b21f0366b3942ae23d428155856a3deedccf6dcd00f3e27652a625455367d.exe	40
PID 2772 wrote to memory of 1656	2772	yuouacul.exe	43
PID 2772 wrote to memory of 1656	2772	yuouacul.exe	43
PID 2772 wrote to memory of 1656	2772	yuouacul.exe	43
PID 2772 wrote to memory of 1656	2772	yuouacul.exe	43
PID 2772 wrote to memory of 1656	2772	yuouacul.exe	43
PID 2772 wrote to memory of 1656	2772	yuouacul.exe	43

C:\Users\Admin\AppData\Local\Temp\6c2b21f0366b3942ae23d428155856a3deedccf6dcd00f3e27652a625455367d.exe
"C:\Users\Admin\AppData\Local\Temp\6c2b21f0366b3942ae23d428155856a3deedccf6dcd00f3e27652a625455367d.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2992
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\jsngpsaf\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2928
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\yuouacul.exe" C:\Windows\SysWOW64\jsngpsaf\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2080
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create jsngpsaf binPath= "C:\Windows\SysWOW64\jsngpsaf\yuouacul.exe /d\"C:\Users\Admin\AppData\Local\Temp\6c2b21f0366b3942ae23d428155856a3deedccf6dcd00f3e27652a625455367d.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2716
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description jsngpsaf "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2780
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start jsngpsaf
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2652
- 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:2756

C:\Windows\SysWOW64\jsngpsaf\yuouacul.exe
C:\Windows\SysWOW64\jsngpsaf\yuouacul.exe /d"C:\Users\Admin\AppData\Local\Temp\6c2b21f0366b3942ae23d428155856a3deedccf6dcd00f3e27652a625455367d.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2772
- 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:1656

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

System Services

T1569

Service Execution

T1569.002

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Create or Modify System Process

T1543

Windows Service

T1543.003

Event Triggered Execution

T1546

Netsh Helper DLL

T1546.007

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Create or Modify System Process

T1543

Windows Service

T1543.003

Event Triggered Execution

T1546

Netsh Helper DLL

T1546.007

Defense Evasion

Impair Defenses

T1562

Disable or Modify System Firewall

T1562.004

Disable or Modify Tools

T1562.001

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

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

Filesize
14.7MB

MD5
347d422b0dfc7ff0093912211efe41e1

SHA1
c0eb78ad4b3c4186e759e131bf59a168f7276314

SHA256
9d560f950a772778085a3e0e661ba31915bc71854168b5cbaaebeea5d9a85a61

SHA512
b79a2674efd1d92c4b89ea9a30b253f066090f6de842cab8ddb43d256a25573fb18d15661ea3dbf8cb487b71e8420d8c82477feacd0aa0257312b04f8c49ea94

Download Submit
memory/1656-8-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/1656-11-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/1656-10-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/1656-13-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/1656-15-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2772-14-0x0000000000400000-0x000000000041C000-memory.dmp

Filesize
112KB

Download
memory/2992-1-0x0000000000400000-0x000000000041C000-memory.dmp

Filesize
112KB

Download
memory/2992-0-0x0000000000240000-0x0000000000241000-memory.dmp

Filesize
4KB

Download
memory/2992-2-0x0000000000260000-0x0000000000261000-memory.dmp

Filesize
4KB

Download
memory/2992-5-0x0000000000400000-0x000000000041C000-memory.dmp

Filesize
112KB

Download