tofsee | 036e57851b2b1068ce726544039a699f748ccbeba8bb2bbdf909cfc6fb95bb3e

Analysis

max time kernel
145s
max time network
145s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
20-10-2024 11:52

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General

Target

oavszyym.exe
Size

14.2MB
MD5

ffc03e5a236c9017d6866dadbdd1bdb0
SHA1

076cce6dd5ea98bb1bbc21280be47aa5aad0829f
SHA256

036e57851b2b1068ce726544039a699f748ccbeba8bb2bbdf909cfc6fb95bb3e
SHA512

5e2fa9d4ce5bc6e358eda911afa2dc3e54301ba9bf6aecc59161f707add76d19b9760be893a98e37ebd7e3b43987b4f9047ac5caea867783fdf3e7e0d89bd137
SSDEEP

24576:8W/EClxN7llllllllllllllllllllllllllllllllllllllllllllllllllllllb:84HN

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\lkugfdne = "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
2556	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\lkugfdne\ImagePath = "C:\\Windows\\SysWOW64\\lkugfdne\\pfamgswo.exe"	svchost.exe

Deletes itself 1 IoCs

pid	Process
2964	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2604	pfamgswo.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2604 set thread context of 2964	2604	pfamgswo.exe	43

Launches sc.exe 3 IoCs

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

pid	Process
2892	sc.exe
2264	sc.exe
2692	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	oavszyym.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	pfamgswo.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
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 2648 wrote to memory of 2760	2648	oavszyym.exe	30
PID 2648 wrote to memory of 2760	2648	oavszyym.exe	30
PID 2648 wrote to memory of 2760	2648	oavszyym.exe	30
PID 2648 wrote to memory of 2760	2648	oavszyym.exe	30
PID 2648 wrote to memory of 2700	2648	oavszyym.exe	32
PID 2648 wrote to memory of 2700	2648	oavszyym.exe	32
PID 2648 wrote to memory of 2700	2648	oavszyym.exe	32
PID 2648 wrote to memory of 2700	2648	oavszyym.exe	32
PID 2648 wrote to memory of 2892	2648	oavszyym.exe	34
PID 2648 wrote to memory of 2892	2648	oavszyym.exe	34
PID 2648 wrote to memory of 2892	2648	oavszyym.exe	34
PID 2648 wrote to memory of 2892	2648	oavszyym.exe	34
PID 2648 wrote to memory of 2264	2648	oavszyym.exe	36
PID 2648 wrote to memory of 2264	2648	oavszyym.exe	36
PID 2648 wrote to memory of 2264	2648	oavszyym.exe	36
PID 2648 wrote to memory of 2264	2648	oavszyym.exe	36
PID 2648 wrote to memory of 2692	2648	oavszyym.exe	38
PID 2648 wrote to memory of 2692	2648	oavszyym.exe	38
PID 2648 wrote to memory of 2692	2648	oavszyym.exe	38
PID 2648 wrote to memory of 2692	2648	oavszyym.exe	38
PID 2648 wrote to memory of 2556	2648	oavszyym.exe	41
PID 2648 wrote to memory of 2556	2648	oavszyym.exe	41
PID 2648 wrote to memory of 2556	2648	oavszyym.exe	41
PID 2648 wrote to memory of 2556	2648	oavszyym.exe	41
PID 2604 wrote to memory of 2964	2604	pfamgswo.exe	43
PID 2604 wrote to memory of 2964	2604	pfamgswo.exe	43
PID 2604 wrote to memory of 2964	2604	pfamgswo.exe	43
PID 2604 wrote to memory of 2964	2604	pfamgswo.exe	43
PID 2604 wrote to memory of 2964	2604	pfamgswo.exe	43
PID 2604 wrote to memory of 2964	2604	pfamgswo.exe	43

C:\Users\Admin\AppData\Local\Temp\oavszyym.exe
"C:\Users\Admin\AppData\Local\Temp\oavszyym.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2648
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\lkugfdne\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2760
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\pfamgswo.exe" C:\Windows\SysWOW64\lkugfdne\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2700
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create lkugfdne binPath= "C:\Windows\SysWOW64\lkugfdne\pfamgswo.exe /d\"C:\Users\Admin\AppData\Local\Temp\oavszyym.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2892
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description lkugfdne "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2264
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start lkugfdne
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2692
- 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:2556

C:\Windows\SysWOW64\lkugfdne\pfamgswo.exe
C:\Windows\SysWOW64\lkugfdne\pfamgswo.exe /d"C:\Users\Admin\AppData\Local\Temp\oavszyym.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2604
- 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:2964

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\pfamgswo.exe

Filesize
12.2MB

MD5
4bd570e34d84aaef92f75cffb9674210

SHA1
552d545d616dfb84894e1087b1aaa45b897a6713

SHA256
c5ca904f18ca0c2087cedcab56db5b9360d4cbad887d0961a3fabbce2b27907e

SHA512
59014339fbefab2c15e200961c851ebb6fd7c49a9068ce1d0b7cb6c322148bad90a4302468b3caa100d60d860e98794a78cfb2b1e41c2048e1e6e1bf38280aa9

Download Submit
memory/2604-15-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/2648-8-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/2648-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2648-10-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2648-9-0x0000000000220000-0x0000000000233000-memory.dmp

Filesize
76KB

Download
memory/2648-1-0x00000000004E0000-0x00000000005E0000-memory.dmp

Filesize
1024KB

Download
memory/2648-2-0x0000000000220000-0x0000000000233000-memory.dmp

Filesize
76KB

Download
memory/2964-11-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2964-14-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2964-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2964-17-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2964-18-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads