tofsee | eb337a3207ee729da109a3d4d4e33be246d28739d7641aab00b4e945d05bebd6

General

Target

eb337a3207ee729da109a3d4d4e33be246d28739d7641aab00b4e945d05bebd6.exe
Size

183KB
MD5

ed811dad14636a79c920a2d2cb1ec86d
SHA1

50760c4737b74990413fd2facb197482a8ce9f7d
SHA256

eb337a3207ee729da109a3d4d4e33be246d28739d7641aab00b4e945d05bebd6
SHA512

4ee8d63adcb3bc266341848b6e27fc016a1ed9cd81865601a17fd6aeafb064b12b74e6da36cb92ffe4f20685436b97b92e03450279ef6bbbb76f9be297e13c3a
SSDEEP

3072:i7QK+RkpwAtmsNNCIFzEhpwC33IH+lgpfrVggjcGkNIVqIF:FRkpwAtmsNNVyMx7ITsq

Score

10^/10

tofsee discovery evasion execution persistence privilege_escalation trojan

Malware Config

Extracted

Family

tofsee

C2

quadoil.ru

lakeflex.ru

Signatures

Tofsee
Backdoor/botnet which carries out malicious activities based on commands from a C2 server.
trojan tofsee
Tofsee family
tofsee
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
3092	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\bipxjsfv\ImagePath = "C:\\Windows\\SysWOW64\\bipxjsfv\\cpyvwbna.exe"	svchost.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-4050598569-1597076380-177084960-1000\Control Panel\International\Geo\Nation	eb337a3207ee729da109a3d4d4e33be246d28739d7641aab00b4e945d05bebd6.exe

Deletes itself 1 IoCs

pid	Process
3780	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
4104	cpyvwbna.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4104 set thread context of 3780	4104	cpyvwbna.exe	100

Launches sc.exe 3 IoCs

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

pid	Process
32	sc.exe
4280	sc.exe
2952	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 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

Program crash 2 IoCs

pid	pid_target	Process	procid_target
4692	4556	WerFault.exe	82
4600	4104	WerFault.exe	96

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	cpyvwbna.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	eb337a3207ee729da109a3d4d4e33be246d28739d7641aab00b4e945d05bebd6.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	netsh.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 4556 wrote to memory of 4644	4556	eb337a3207ee729da109a3d4d4e33be246d28739d7641aab00b4e945d05bebd6.exe	86
PID 4556 wrote to memory of 4644	4556	eb337a3207ee729da109a3d4d4e33be246d28739d7641aab00b4e945d05bebd6.exe	86
PID 4556 wrote to memory of 4644	4556	eb337a3207ee729da109a3d4d4e33be246d28739d7641aab00b4e945d05bebd6.exe	86
PID 4556 wrote to memory of 3844	4556	eb337a3207ee729da109a3d4d4e33be246d28739d7641aab00b4e945d05bebd6.exe	88
PID 4556 wrote to memory of 3844	4556	eb337a3207ee729da109a3d4d4e33be246d28739d7641aab00b4e945d05bebd6.exe	88
PID 4556 wrote to memory of 3844	4556	eb337a3207ee729da109a3d4d4e33be246d28739d7641aab00b4e945d05bebd6.exe	88
PID 4556 wrote to memory of 32	4556	eb337a3207ee729da109a3d4d4e33be246d28739d7641aab00b4e945d05bebd6.exe	90
PID 4556 wrote to memory of 32	4556	eb337a3207ee729da109a3d4d4e33be246d28739d7641aab00b4e945d05bebd6.exe	90
PID 4556 wrote to memory of 32	4556	eb337a3207ee729da109a3d4d4e33be246d28739d7641aab00b4e945d05bebd6.exe	90
PID 4556 wrote to memory of 4280	4556	eb337a3207ee729da109a3d4d4e33be246d28739d7641aab00b4e945d05bebd6.exe	92
PID 4556 wrote to memory of 4280	4556	eb337a3207ee729da109a3d4d4e33be246d28739d7641aab00b4e945d05bebd6.exe	92
PID 4556 wrote to memory of 4280	4556	eb337a3207ee729da109a3d4d4e33be246d28739d7641aab00b4e945d05bebd6.exe	92
PID 4556 wrote to memory of 2952	4556	eb337a3207ee729da109a3d4d4e33be246d28739d7641aab00b4e945d05bebd6.exe	94
PID 4556 wrote to memory of 2952	4556	eb337a3207ee729da109a3d4d4e33be246d28739d7641aab00b4e945d05bebd6.exe	94
PID 4556 wrote to memory of 2952	4556	eb337a3207ee729da109a3d4d4e33be246d28739d7641aab00b4e945d05bebd6.exe	94
PID 4556 wrote to memory of 3092	4556	eb337a3207ee729da109a3d4d4e33be246d28739d7641aab00b4e945d05bebd6.exe	97
PID 4556 wrote to memory of 3092	4556	eb337a3207ee729da109a3d4d4e33be246d28739d7641aab00b4e945d05bebd6.exe	97
PID 4556 wrote to memory of 3092	4556	eb337a3207ee729da109a3d4d4e33be246d28739d7641aab00b4e945d05bebd6.exe	97
PID 4104 wrote to memory of 3780	4104	cpyvwbna.exe	100
PID 4104 wrote to memory of 3780	4104	cpyvwbna.exe	100
PID 4104 wrote to memory of 3780	4104	cpyvwbna.exe	100
PID 4104 wrote to memory of 3780	4104	cpyvwbna.exe	100
PID 4104 wrote to memory of 3780	4104	cpyvwbna.exe	100

C:\Users\Admin\AppData\Local\Temp\eb337a3207ee729da109a3d4d4e33be246d28739d7641aab00b4e945d05bebd6.exe
"C:\Users\Admin\AppData\Local\Temp\eb337a3207ee729da109a3d4d4e33be246d28739d7641aab00b4e945d05bebd6.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4556
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\bipxjsfv\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4644
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\cpyvwbna.exe" C:\Windows\SysWOW64\bipxjsfv\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:3844
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create bipxjsfv binPath= "C:\Windows\SysWOW64\bipxjsfv\cpyvwbna.exe /d\"C:\Users\Admin\AppData\Local\Temp\eb337a3207ee729da109a3d4d4e33be246d28739d7641aab00b4e945d05bebd6.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:32
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description bipxjsfv "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4280
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start bipxjsfv
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2952
- 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:3092
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4556 -s 1036
  2⤵
  - Program crash
  PID:4692

C:\Windows\SysWOW64\bipxjsfv\cpyvwbna.exe
C:\Windows\SysWOW64\bipxjsfv\cpyvwbna.exe /d"C:\Users\Admin\AppData\Local\Temp\eb337a3207ee729da109a3d4d4e33be246d28739d7641aab00b4e945d05bebd6.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4104
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:3780
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4104 -s 512
  2⤵
  - Program crash
  PID:4600

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 468 -p 4556 -ip 4556
1⤵
PID:3528

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 448 -p 4104 -ip 4104
1⤵
PID:1316

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

System Services

1

T1569

Service Execution

1

T1569.002

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Create or Modify System Process

2

T1543

Windows Service

2

T1543.003

Event Triggered Execution

1

T1546

Netsh Helper DLL

1

T1546.007

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Create or Modify System Process

2

T1543

Windows Service

2

T1543.003

Event Triggered Execution

1

T1546

Netsh Helper DLL

1

T1546.007

Defense Evasion

Impair Defenses

1

T1562

Disable or Modify System Firewall

Modify Registry

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

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

Filesize
11.6MB

MD5
0bb144cb3f11701034c03f700c487a9d

SHA1
c849c288165a16491abc63414c670a8b6cd90a32

SHA256
6bb5fb2535251b5f3c288d243598700e35e98b3647a785c54febce2b3c6ccb2a

SHA512
b1a48f1a096ae25092fde7294601acc97c421d49c83f60ddd8e4bc0bfb960fb05d1401d8b34c4d8faa375beb5b59c1f9a49e02f61d35e348cb968248fe85987b

Download Submit
memory/3780-8-0x0000000000B50000-0x0000000000B65000-memory.dmp

Filesize
84KB

Download
memory/3780-20-0x0000000000B50000-0x0000000000B65000-memory.dmp

Filesize
84KB

Download
memory/3780-19-0x0000000000B50000-0x0000000000B65000-memory.dmp

Filesize
84KB

Download
memory/3780-18-0x0000000000B50000-0x0000000000B65000-memory.dmp

Filesize
84KB

Download
memory/3780-11-0x0000000000B50000-0x0000000000B65000-memory.dmp

Filesize
84KB

Download
memory/4104-13-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/4104-7-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/4104-6-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/4556-0-0x0000000002180000-0x000000000218D000-memory.dmp

Filesize
52KB

Download
memory/4556-17-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/4556-16-0x0000000002190000-0x00000000021A3000-memory.dmp

Filesize
76KB

Download
memory/4556-15-0x0000000002180000-0x000000000218D000-memory.dmp

Filesize
52KB

Download
memory/4556-14-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/4556-2-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/4556-1-0x0000000002190000-0x00000000021A3000-memory.dmp

Filesize
76KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads