tofsee | 0479dd4c50da096ebc1143c05d2f1880ffa2138686430736f078c59c46252e0d

Analysis

max time kernel
149s
max time network
155s
platform
windows7_x64
resource
win7-20240705-en
resource tags

arch:x64arch:x86image:win7-20240705-enlocale:en-usos:windows7-x64system
submitted
01-09-2024 00:55

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General

Target

3ef291e4dc9f5a6e42ae653acae1e014e90bf658c4160f6e8de7f2e4b0538460.exe
Size

10.5MB
MD5

026f086162e7d6d864ca4dc744149bc0
SHA1

cc81af6e0d8bd8c89126f509ccb5714cce8a3ef0
SHA256

3ef291e4dc9f5a6e42ae653acae1e014e90bf658c4160f6e8de7f2e4b0538460
SHA512

ff7ba4526233eb5a7e6dfa4673bfe0dc9b354a9960c23822267cab62c1571139e93c3919d8bf38bd1afd58b147ea15a2fdc1ad6b92f2e0fd2e65b14847cdebf4
SSDEEP

49152:DkHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHn:

Score

10^/10

tofsee discovery evasion execution persistence privilege_escalation trojan

Malware Config

Extracted

Family

tofsee

quadoil.ru

lakeflex.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

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths\C:\Windows\SysWOW64\tfuzmimm = "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

pid	Process
2832	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\tfuzmimm\ImagePath = "C:\\Windows\\SysWOW64\\tfuzmimm\\ydndrw.exe"	svchost.exe

Deletes itself 1 IoCs

pid	Process
2392	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2880	ydndrw.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2880 set thread context of 2392	2880	ydndrw.exe	42

Launches sc.exe 3 IoCs

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

pid	Process
2512	sc.exe
2668	sc.exe
2844	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

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	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	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	netsh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	ydndrw.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	3ef291e4dc9f5a6e42ae653acae1e014e90bf658c4160f6e8de7f2e4b0538460.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 2488 wrote to memory of 2072	2488	3ef291e4dc9f5a6e42ae653acae1e014e90bf658c4160f6e8de7f2e4b0538460.exe	29
PID 2488 wrote to memory of 2072	2488	3ef291e4dc9f5a6e42ae653acae1e014e90bf658c4160f6e8de7f2e4b0538460.exe	29
PID 2488 wrote to memory of 2072	2488	3ef291e4dc9f5a6e42ae653acae1e014e90bf658c4160f6e8de7f2e4b0538460.exe	29
PID 2488 wrote to memory of 2072	2488	3ef291e4dc9f5a6e42ae653acae1e014e90bf658c4160f6e8de7f2e4b0538460.exe	29
PID 2488 wrote to memory of 1724	2488	3ef291e4dc9f5a6e42ae653acae1e014e90bf658c4160f6e8de7f2e4b0538460.exe	31
PID 2488 wrote to memory of 1724	2488	3ef291e4dc9f5a6e42ae653acae1e014e90bf658c4160f6e8de7f2e4b0538460.exe	31
PID 2488 wrote to memory of 1724	2488	3ef291e4dc9f5a6e42ae653acae1e014e90bf658c4160f6e8de7f2e4b0538460.exe	31
PID 2488 wrote to memory of 1724	2488	3ef291e4dc9f5a6e42ae653acae1e014e90bf658c4160f6e8de7f2e4b0538460.exe	31
PID 2488 wrote to memory of 2512	2488	3ef291e4dc9f5a6e42ae653acae1e014e90bf658c4160f6e8de7f2e4b0538460.exe	33
PID 2488 wrote to memory of 2512	2488	3ef291e4dc9f5a6e42ae653acae1e014e90bf658c4160f6e8de7f2e4b0538460.exe	33
PID 2488 wrote to memory of 2512	2488	3ef291e4dc9f5a6e42ae653acae1e014e90bf658c4160f6e8de7f2e4b0538460.exe	33
PID 2488 wrote to memory of 2512	2488	3ef291e4dc9f5a6e42ae653acae1e014e90bf658c4160f6e8de7f2e4b0538460.exe	33
PID 2488 wrote to memory of 2668	2488	3ef291e4dc9f5a6e42ae653acae1e014e90bf658c4160f6e8de7f2e4b0538460.exe	35
PID 2488 wrote to memory of 2668	2488	3ef291e4dc9f5a6e42ae653acae1e014e90bf658c4160f6e8de7f2e4b0538460.exe	35
PID 2488 wrote to memory of 2668	2488	3ef291e4dc9f5a6e42ae653acae1e014e90bf658c4160f6e8de7f2e4b0538460.exe	35
PID 2488 wrote to memory of 2668	2488	3ef291e4dc9f5a6e42ae653acae1e014e90bf658c4160f6e8de7f2e4b0538460.exe	35
PID 2488 wrote to memory of 2844	2488	3ef291e4dc9f5a6e42ae653acae1e014e90bf658c4160f6e8de7f2e4b0538460.exe	37
PID 2488 wrote to memory of 2844	2488	3ef291e4dc9f5a6e42ae653acae1e014e90bf658c4160f6e8de7f2e4b0538460.exe	37
PID 2488 wrote to memory of 2844	2488	3ef291e4dc9f5a6e42ae653acae1e014e90bf658c4160f6e8de7f2e4b0538460.exe	37
PID 2488 wrote to memory of 2844	2488	3ef291e4dc9f5a6e42ae653acae1e014e90bf658c4160f6e8de7f2e4b0538460.exe	37
PID 2488 wrote to memory of 2832	2488	3ef291e4dc9f5a6e42ae653acae1e014e90bf658c4160f6e8de7f2e4b0538460.exe	39
PID 2488 wrote to memory of 2832	2488	3ef291e4dc9f5a6e42ae653acae1e014e90bf658c4160f6e8de7f2e4b0538460.exe	39
PID 2488 wrote to memory of 2832	2488	3ef291e4dc9f5a6e42ae653acae1e014e90bf658c4160f6e8de7f2e4b0538460.exe	39
PID 2488 wrote to memory of 2832	2488	3ef291e4dc9f5a6e42ae653acae1e014e90bf658c4160f6e8de7f2e4b0538460.exe	39
PID 2880 wrote to memory of 2392	2880	ydndrw.exe	42
PID 2880 wrote to memory of 2392	2880	ydndrw.exe	42
PID 2880 wrote to memory of 2392	2880	ydndrw.exe	42
PID 2880 wrote to memory of 2392	2880	ydndrw.exe	42
PID 2880 wrote to memory of 2392	2880	ydndrw.exe	42
PID 2880 wrote to memory of 2392	2880	ydndrw.exe	42

C:\Users\Admin\AppData\Local\Temp\3ef291e4dc9f5a6e42ae653acae1e014e90bf658c4160f6e8de7f2e4b0538460.exe
"C:\Users\Admin\AppData\Local\Temp\3ef291e4dc9f5a6e42ae653acae1e014e90bf658c4160f6e8de7f2e4b0538460.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2488
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\tfuzmimm\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2072
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\ydndrw.exe" C:\Windows\SysWOW64\tfuzmimm\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:1724
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create tfuzmimm binPath= "C:\Windows\SysWOW64\tfuzmimm\ydndrw.exe /d\"C:\Users\Admin\AppData\Local\Temp\3ef291e4dc9f5a6e42ae653acae1e014e90bf658c4160f6e8de7f2e4b0538460.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2512
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description tfuzmimm "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2668
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start tfuzmimm
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2844
- 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:2832

C:\Windows\SysWOW64\tfuzmimm\ydndrw.exe
C:\Windows\SysWOW64\tfuzmimm\ydndrw.exe /d"C:\Users\Admin\AppData\Local\Temp\3ef291e4dc9f5a6e42ae653acae1e014e90bf658c4160f6e8de7f2e4b0538460.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2880
- 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:2392

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\ydndrw.exe

Filesize
13.2MB

MD5
70924a5c4a0caf25c918a3248c6c15d8

SHA1
4eec4da1eafc6ecf7c7371f6152dc1e504a6bedd

SHA256
82fa33db40bc2755ef020ae6615202a50ee06488f8096a8d493274b535914a65

SHA512
e8bc82c1a20113ecdee0c32cee1554af55bb4f7246b192a767102dc9c114a95c9649f27910e89b2ff17619ae6e4322155d8a789c8edbe3f969907232441fae1f

Download Submit
memory/2392-11-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download
memory/2392-14-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download
memory/2392-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2392-16-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download
memory/2392-18-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download
memory/2488-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2488-1-0x00000000008F0000-0x00000000009F0000-memory.dmp

Filesize
1024KB

Download
memory/2488-8-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2488-7-0x0000000000220000-0x0000000000233000-memory.dmp

Filesize
76KB

Download
memory/2488-6-0x0000000000400000-0x0000000000785000-memory.dmp

Filesize
3.5MB

Download
memory/2488-2-0x0000000000220000-0x0000000000233000-memory.dmp

Filesize
76KB

Download
memory/2880-17-0x0000000000400000-0x0000000000785000-memory.dmp

Filesize
3.5MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads