tofsee | d0a0ca092838272e6388908e3add4baec96a62c7e79dc60dad9116fe77f7cdca

Analysis

max time kernel
146s
max time network
146s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
21/12/2024, 17:38

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General

Target

d0a0ca092838272e6388908e3add4baec96a62c7e79dc60dad9116fe77f7cdca.exe
Size

280KB
MD5

1efcf9901e3eccbd59173a37452e238b
SHA1

9585897fce73f306b95a2c088483438893b62853
SHA256

d0a0ca092838272e6388908e3add4baec96a62c7e79dc60dad9116fe77f7cdca
SHA512

5eebeec99f6aaa67729e5a1dc19a5a7dccc9b7f47e4f721df8440c071cfa95698d4321eefb9faee4e21fadda9ea6f60c14030b1818450f11dd2bdd833a408cfd
SSDEEP

6144:DU6BbccF0QC7hSIZ34p4rIlROhxxpeTr/ekIw:3BbLF0d7hWGrICzxp6L

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
Tofsee family
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\wmbisywo = "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
2644	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\wmbisywo\ImagePath = "C:\\Windows\\SysWOW64\\wmbisywo\\ywgeeudt.exe"	svchost.exe

Deletes itself 1 IoCs

pid	Process
2112	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2948	ywgeeudt.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2948 set thread context of 2112	2948	ywgeeudt.exe	43

Launches sc.exe 3 IoCs

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

pid	Process
2772	sc.exe
2892	sc.exe
2788	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	d0a0ca092838272e6388908e3add4baec96a62c7e79dc60dad9116fe77f7cdca.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	svchost.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	netsh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	ywgeeudt.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 1712 wrote to memory of 1796	1712	d0a0ca092838272e6388908e3add4baec96a62c7e79dc60dad9116fe77f7cdca.exe	30
PID 1712 wrote to memory of 1796	1712	d0a0ca092838272e6388908e3add4baec96a62c7e79dc60dad9116fe77f7cdca.exe	30
PID 1712 wrote to memory of 1796	1712	d0a0ca092838272e6388908e3add4baec96a62c7e79dc60dad9116fe77f7cdca.exe	30
PID 1712 wrote to memory of 1796	1712	d0a0ca092838272e6388908e3add4baec96a62c7e79dc60dad9116fe77f7cdca.exe	30
PID 1712 wrote to memory of 2736	1712	d0a0ca092838272e6388908e3add4baec96a62c7e79dc60dad9116fe77f7cdca.exe	32
PID 1712 wrote to memory of 2736	1712	d0a0ca092838272e6388908e3add4baec96a62c7e79dc60dad9116fe77f7cdca.exe	32
PID 1712 wrote to memory of 2736	1712	d0a0ca092838272e6388908e3add4baec96a62c7e79dc60dad9116fe77f7cdca.exe	32
PID 1712 wrote to memory of 2736	1712	d0a0ca092838272e6388908e3add4baec96a62c7e79dc60dad9116fe77f7cdca.exe	32
PID 1712 wrote to memory of 2772	1712	d0a0ca092838272e6388908e3add4baec96a62c7e79dc60dad9116fe77f7cdca.exe	34
PID 1712 wrote to memory of 2772	1712	d0a0ca092838272e6388908e3add4baec96a62c7e79dc60dad9116fe77f7cdca.exe	34
PID 1712 wrote to memory of 2772	1712	d0a0ca092838272e6388908e3add4baec96a62c7e79dc60dad9116fe77f7cdca.exe	34
PID 1712 wrote to memory of 2772	1712	d0a0ca092838272e6388908e3add4baec96a62c7e79dc60dad9116fe77f7cdca.exe	34
PID 1712 wrote to memory of 2892	1712	d0a0ca092838272e6388908e3add4baec96a62c7e79dc60dad9116fe77f7cdca.exe	36
PID 1712 wrote to memory of 2892	1712	d0a0ca092838272e6388908e3add4baec96a62c7e79dc60dad9116fe77f7cdca.exe	36
PID 1712 wrote to memory of 2892	1712	d0a0ca092838272e6388908e3add4baec96a62c7e79dc60dad9116fe77f7cdca.exe	36
PID 1712 wrote to memory of 2892	1712	d0a0ca092838272e6388908e3add4baec96a62c7e79dc60dad9116fe77f7cdca.exe	36
PID 1712 wrote to memory of 2788	1712	d0a0ca092838272e6388908e3add4baec96a62c7e79dc60dad9116fe77f7cdca.exe	38
PID 1712 wrote to memory of 2788	1712	d0a0ca092838272e6388908e3add4baec96a62c7e79dc60dad9116fe77f7cdca.exe	38
PID 1712 wrote to memory of 2788	1712	d0a0ca092838272e6388908e3add4baec96a62c7e79dc60dad9116fe77f7cdca.exe	38
PID 1712 wrote to memory of 2788	1712	d0a0ca092838272e6388908e3add4baec96a62c7e79dc60dad9116fe77f7cdca.exe	38
PID 1712 wrote to memory of 2644	1712	d0a0ca092838272e6388908e3add4baec96a62c7e79dc60dad9116fe77f7cdca.exe	41
PID 1712 wrote to memory of 2644	1712	d0a0ca092838272e6388908e3add4baec96a62c7e79dc60dad9116fe77f7cdca.exe	41
PID 1712 wrote to memory of 2644	1712	d0a0ca092838272e6388908e3add4baec96a62c7e79dc60dad9116fe77f7cdca.exe	41
PID 1712 wrote to memory of 2644	1712	d0a0ca092838272e6388908e3add4baec96a62c7e79dc60dad9116fe77f7cdca.exe	41
PID 2948 wrote to memory of 2112	2948	ywgeeudt.exe	43
PID 2948 wrote to memory of 2112	2948	ywgeeudt.exe	43
PID 2948 wrote to memory of 2112	2948	ywgeeudt.exe	43
PID 2948 wrote to memory of 2112	2948	ywgeeudt.exe	43
PID 2948 wrote to memory of 2112	2948	ywgeeudt.exe	43
PID 2948 wrote to memory of 2112	2948	ywgeeudt.exe	43

C:\Users\Admin\AppData\Local\Temp\d0a0ca092838272e6388908e3add4baec96a62c7e79dc60dad9116fe77f7cdca.exe
"C:\Users\Admin\AppData\Local\Temp\d0a0ca092838272e6388908e3add4baec96a62c7e79dc60dad9116fe77f7cdca.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1712
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\wmbisywo\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:1796
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\ywgeeudt.exe" C:\Windows\SysWOW64\wmbisywo\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2736
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create wmbisywo binPath= "C:\Windows\SysWOW64\wmbisywo\ywgeeudt.exe /d\"C:\Users\Admin\AppData\Local\Temp\d0a0ca092838272e6388908e3add4baec96a62c7e79dc60dad9116fe77f7cdca.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2772
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description wmbisywo "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2892
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start wmbisywo
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2788
- 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\wmbisywo\ywgeeudt.exe
C:\Windows\SysWOW64\wmbisywo\ywgeeudt.exe /d"C:\Users\Admin\AppData\Local\Temp\d0a0ca092838272e6388908e3add4baec96a62c7e79dc60dad9116fe77f7cdca.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2948
- 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:2112

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\ywgeeudt.exe

Filesize
11.7MB

MD5
54bd6b5affc8d24655d536d14be77653

SHA1
8f82d4af11947d95087fa3369bc5fa6f705176a3

SHA256
a8d9bf76478b4559ff6161e483ed53a6e777cfcade549b0b28b6527dd4051b54

SHA512
1821f75483cc6742743be1758589bf8033d35c7fb521b0e61f8a399b4aa7d971277ba150cb452948847f4d01d8dfbd1e5484c50d8f253bb517f459369c9cb96a

Download Submit
memory/1712-9-0x0000000000020000-0x0000000000033000-memory.dmp

Filesize
76KB

Download
memory/1712-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/1712-2-0x0000000000020000-0x0000000000033000-memory.dmp

Filesize
76KB

Download
memory/1712-8-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1712-10-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/1712-1-0x00000000002D0000-0x00000000003D0000-memory.dmp

Filesize
1024KB

Download
memory/2112-14-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download
memory/2112-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2112-16-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download
memory/2112-11-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download
memory/2112-18-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download
memory/2948-17-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads