tofsee | 82aa9a86e40c08cd9fb8a692485ed58cd00e737747da32b80b7cd93809ef7de5

Analysis

max time kernel
145s
max time network
146s
platform
windows7_x64
resource
win7-20240708-en
resource tags

arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
submitted
31/08/2024, 13:09

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

072e795c44b87d1eb54005be791e75db47cb9717e43b300d3e27b6c9d99523fd.exe
Size

13.6MB
MD5

b5b559ae20ec80c26ec50afd2d077f53
SHA1

4553fc5937302711ee5e74a881c7fd4acd119e5b
SHA256

072e795c44b87d1eb54005be791e75db47cb9717e43b300d3e27b6c9d99523fd
SHA512

dadb525483641f1574c5efcb48cc2c1333d34145b1b7e6386afa9f3e64db7ce45bbe4fc70f2656a997ec42e839bc73cb4c641bd97061e95d712c476f5573cdfd
SSDEEP

196608:aI+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++2:a

Score

10^/10

tofsee discovery evasion execution persistence privilege_escalation trojan

Malware Config

Extracted

Family

tofsee

defeatwax.ru

refabyd.info

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\iduyeemf = "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
2252	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\iduyeemf\ImagePath = "C:\\Windows\\SysWOW64\\iduyeemf\\bexfdfnx.exe"	svchost.exe

Deletes itself 1 IoCs

pid	Process
2724	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2808	bexfdfnx.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2808 set thread context of 2724	2808	bexfdfnx.exe	43

Launches sc.exe 3 IoCs

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

pid	Process
1156	sc.exe
2816	sc.exe
2916	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	072e795c44b87d1eb54005be791e75db47cb9717e43b300d3e27b6c9d99523fd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	bexfdfnx.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	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 30 IoCs

description	pid	Process	procid_target
PID 2372 wrote to memory of 2692	2372	072e795c44b87d1eb54005be791e75db47cb9717e43b300d3e27b6c9d99523fd.exe	30
PID 2372 wrote to memory of 2692	2372	072e795c44b87d1eb54005be791e75db47cb9717e43b300d3e27b6c9d99523fd.exe	30
PID 2372 wrote to memory of 2692	2372	072e795c44b87d1eb54005be791e75db47cb9717e43b300d3e27b6c9d99523fd.exe	30
PID 2372 wrote to memory of 2692	2372	072e795c44b87d1eb54005be791e75db47cb9717e43b300d3e27b6c9d99523fd.exe	30
PID 2372 wrote to memory of 1824	2372	072e795c44b87d1eb54005be791e75db47cb9717e43b300d3e27b6c9d99523fd.exe	32
PID 2372 wrote to memory of 1824	2372	072e795c44b87d1eb54005be791e75db47cb9717e43b300d3e27b6c9d99523fd.exe	32
PID 2372 wrote to memory of 1824	2372	072e795c44b87d1eb54005be791e75db47cb9717e43b300d3e27b6c9d99523fd.exe	32
PID 2372 wrote to memory of 1824	2372	072e795c44b87d1eb54005be791e75db47cb9717e43b300d3e27b6c9d99523fd.exe	32
PID 2372 wrote to memory of 2916	2372	072e795c44b87d1eb54005be791e75db47cb9717e43b300d3e27b6c9d99523fd.exe	34
PID 2372 wrote to memory of 2916	2372	072e795c44b87d1eb54005be791e75db47cb9717e43b300d3e27b6c9d99523fd.exe	34
PID 2372 wrote to memory of 2916	2372	072e795c44b87d1eb54005be791e75db47cb9717e43b300d3e27b6c9d99523fd.exe	34
PID 2372 wrote to memory of 2916	2372	072e795c44b87d1eb54005be791e75db47cb9717e43b300d3e27b6c9d99523fd.exe	34
PID 2372 wrote to memory of 1156	2372	072e795c44b87d1eb54005be791e75db47cb9717e43b300d3e27b6c9d99523fd.exe	36
PID 2372 wrote to memory of 1156	2372	072e795c44b87d1eb54005be791e75db47cb9717e43b300d3e27b6c9d99523fd.exe	36
PID 2372 wrote to memory of 1156	2372	072e795c44b87d1eb54005be791e75db47cb9717e43b300d3e27b6c9d99523fd.exe	36
PID 2372 wrote to memory of 1156	2372	072e795c44b87d1eb54005be791e75db47cb9717e43b300d3e27b6c9d99523fd.exe	36
PID 2372 wrote to memory of 2816	2372	072e795c44b87d1eb54005be791e75db47cb9717e43b300d3e27b6c9d99523fd.exe	38
PID 2372 wrote to memory of 2816	2372	072e795c44b87d1eb54005be791e75db47cb9717e43b300d3e27b6c9d99523fd.exe	38
PID 2372 wrote to memory of 2816	2372	072e795c44b87d1eb54005be791e75db47cb9717e43b300d3e27b6c9d99523fd.exe	38
PID 2372 wrote to memory of 2816	2372	072e795c44b87d1eb54005be791e75db47cb9717e43b300d3e27b6c9d99523fd.exe	38
PID 2372 wrote to memory of 2252	2372	072e795c44b87d1eb54005be791e75db47cb9717e43b300d3e27b6c9d99523fd.exe	41
PID 2372 wrote to memory of 2252	2372	072e795c44b87d1eb54005be791e75db47cb9717e43b300d3e27b6c9d99523fd.exe	41
PID 2372 wrote to memory of 2252	2372	072e795c44b87d1eb54005be791e75db47cb9717e43b300d3e27b6c9d99523fd.exe	41
PID 2372 wrote to memory of 2252	2372	072e795c44b87d1eb54005be791e75db47cb9717e43b300d3e27b6c9d99523fd.exe	41
PID 2808 wrote to memory of 2724	2808	bexfdfnx.exe	43
PID 2808 wrote to memory of 2724	2808	bexfdfnx.exe	43
PID 2808 wrote to memory of 2724	2808	bexfdfnx.exe	43
PID 2808 wrote to memory of 2724	2808	bexfdfnx.exe	43
PID 2808 wrote to memory of 2724	2808	bexfdfnx.exe	43
PID 2808 wrote to memory of 2724	2808	bexfdfnx.exe	43

C:\Users\Admin\AppData\Local\Temp\072e795c44b87d1eb54005be791e75db47cb9717e43b300d3e27b6c9d99523fd.exe
"C:\Users\Admin\AppData\Local\Temp\072e795c44b87d1eb54005be791e75db47cb9717e43b300d3e27b6c9d99523fd.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2372
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\iduyeemf\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2692
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\bexfdfnx.exe" C:\Windows\SysWOW64\iduyeemf\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:1824
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create iduyeemf binPath= "C:\Windows\SysWOW64\iduyeemf\bexfdfnx.exe /d\"C:\Users\Admin\AppData\Local\Temp\072e795c44b87d1eb54005be791e75db47cb9717e43b300d3e27b6c9d99523fd.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2916
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description iduyeemf "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:1156
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start iduyeemf
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2816
- 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:2252

C:\Windows\SysWOW64\iduyeemf\bexfdfnx.exe
C:\Windows\SysWOW64\iduyeemf\bexfdfnx.exe /d"C:\Users\Admin\AppData\Local\Temp\072e795c44b87d1eb54005be791e75db47cb9717e43b300d3e27b6c9d99523fd.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2808
- 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:2724

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

Replay Monitor

Loading Replay Monitor...

Downloads

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

Filesize
13.4MB

MD5
a9e0fba0a212c192b23eaba74a4aaca9

SHA1
ed41e0065750d177257e23614ad6e01263e833e3

SHA256
7235ad0a4c22ceeb1ba372d9803b2a3a686c7e6f317ae6a9c64c474a23fcdb23

SHA512
0f0f5c3906db222d76b39e69f9ed9553c4c9b87f21d72750e208ed582f934060f075a13589546492aef205e5dc17e8a56538bcea12993e7c5f1134e42552dcce

Download Submit
memory/2372-11-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2372-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2372-1-0x0000000000990000-0x0000000000A90000-memory.dmp

Filesize
1024KB

Download
memory/2372-8-0x0000000000400000-0x0000000000870000-memory.dmp

Filesize
4.4MB

Download
memory/2372-10-0x0000000000990000-0x0000000000A90000-memory.dmp

Filesize
1024KB

Download
memory/2372-2-0x0000000000020000-0x0000000000033000-memory.dmp

Filesize
76KB

Download
memory/2372-9-0x0000000000020000-0x0000000000033000-memory.dmp

Filesize
76KB

Download
memory/2724-12-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2724-15-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2724-14-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2724-18-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2724-19-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2808-16-0x0000000000400000-0x0000000000870000-memory.dmp

Filesize
4.4MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads