tofsee | e75528357e945973102cc65fbfe482090a4c76a9166a23b5ff60515884fd4ff7

General

Target

181e6f88cf32348d8247bb3c4deb07bf44b677656b43b37a30dfad4a3b3e2935.exe
Size

12.1MB
MD5

0906ff34f48334d4563ca2df39b3cef7
SHA1

289a0a4287b6e42e680a9b7efa0585fd97708f2e
SHA256

181e6f88cf32348d8247bb3c4deb07bf44b677656b43b37a30dfad4a3b3e2935
SHA512

41545edf3fc63015f8bf2d094de7c17688889fbf4956fadd0b2447da2a870967606ad06971b3db4f28de7e8c777a1dcfec67bb8a99454d1598f1a42bb20580f6
SSDEEP

196608:gXPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPP/:g

Score

10^/10

tofsee discovery evasion execution persistence privilege_escalation trojan

Malware Config

Extracted

Family

tofsee

C2

defeatwax.ru

refabyd.info

Signatures

Tofsee
Backdoor/botnet which carries out malicious activities based on commands from a C2 server.
trojan 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
556	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\oozsgpdd\ImagePath = "C:\\Windows\\SysWOW64\\oozsgpdd\\igqooend.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-1-5-21-786284298-625481688-3210388970-1000\Control Panel\International\Geo\Nation	181e6f88cf32348d8247bb3c4deb07bf44b677656b43b37a30dfad4a3b3e2935.exe

Deletes itself 1 IoCs

pid	Process
2324	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
3536	igqooend.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3536 set thread context of 2324	3536	igqooend.exe	107

Launches sc.exe 3 IoCs

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

pid	Process
3540	sc.exe
2668	sc.exe
392	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

Program crash 2 IoCs

pid	pid_target	Process	procid_target
4596	2448	WerFault.exe	83
984	3536	WerFault.exe	99

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	cmd.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	181e6f88cf32348d8247bb3c4deb07bf44b677656b43b37a30dfad4a3b3e2935.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
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	igqooend.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 2448 wrote to memory of 4184	2448	181e6f88cf32348d8247bb3c4deb07bf44b677656b43b37a30dfad4a3b3e2935.exe	87
PID 2448 wrote to memory of 4184	2448	181e6f88cf32348d8247bb3c4deb07bf44b677656b43b37a30dfad4a3b3e2935.exe	87
PID 2448 wrote to memory of 4184	2448	181e6f88cf32348d8247bb3c4deb07bf44b677656b43b37a30dfad4a3b3e2935.exe	87
PID 2448 wrote to memory of 4624	2448	181e6f88cf32348d8247bb3c4deb07bf44b677656b43b37a30dfad4a3b3e2935.exe	89
PID 2448 wrote to memory of 4624	2448	181e6f88cf32348d8247bb3c4deb07bf44b677656b43b37a30dfad4a3b3e2935.exe	89
PID 2448 wrote to memory of 4624	2448	181e6f88cf32348d8247bb3c4deb07bf44b677656b43b37a30dfad4a3b3e2935.exe	89
PID 2448 wrote to memory of 392	2448	181e6f88cf32348d8247bb3c4deb07bf44b677656b43b37a30dfad4a3b3e2935.exe	91
PID 2448 wrote to memory of 392	2448	181e6f88cf32348d8247bb3c4deb07bf44b677656b43b37a30dfad4a3b3e2935.exe	91
PID 2448 wrote to memory of 392	2448	181e6f88cf32348d8247bb3c4deb07bf44b677656b43b37a30dfad4a3b3e2935.exe	91
PID 2448 wrote to memory of 3540	2448	181e6f88cf32348d8247bb3c4deb07bf44b677656b43b37a30dfad4a3b3e2935.exe	95
PID 2448 wrote to memory of 3540	2448	181e6f88cf32348d8247bb3c4deb07bf44b677656b43b37a30dfad4a3b3e2935.exe	95
PID 2448 wrote to memory of 3540	2448	181e6f88cf32348d8247bb3c4deb07bf44b677656b43b37a30dfad4a3b3e2935.exe	95
PID 2448 wrote to memory of 2668	2448	181e6f88cf32348d8247bb3c4deb07bf44b677656b43b37a30dfad4a3b3e2935.exe	97
PID 2448 wrote to memory of 2668	2448	181e6f88cf32348d8247bb3c4deb07bf44b677656b43b37a30dfad4a3b3e2935.exe	97
PID 2448 wrote to memory of 2668	2448	181e6f88cf32348d8247bb3c4deb07bf44b677656b43b37a30dfad4a3b3e2935.exe	97
PID 2448 wrote to memory of 556	2448	181e6f88cf32348d8247bb3c4deb07bf44b677656b43b37a30dfad4a3b3e2935.exe	101
PID 2448 wrote to memory of 556	2448	181e6f88cf32348d8247bb3c4deb07bf44b677656b43b37a30dfad4a3b3e2935.exe	101
PID 2448 wrote to memory of 556	2448	181e6f88cf32348d8247bb3c4deb07bf44b677656b43b37a30dfad4a3b3e2935.exe	101
PID 3536 wrote to memory of 2324	3536	igqooend.exe	107
PID 3536 wrote to memory of 2324	3536	igqooend.exe	107
PID 3536 wrote to memory of 2324	3536	igqooend.exe	107
PID 3536 wrote to memory of 2324	3536	igqooend.exe	107
PID 3536 wrote to memory of 2324	3536	igqooend.exe	107

C:\Users\Admin\AppData\Local\Temp\181e6f88cf32348d8247bb3c4deb07bf44b677656b43b37a30dfad4a3b3e2935.exe
"C:\Users\Admin\AppData\Local\Temp\181e6f88cf32348d8247bb3c4deb07bf44b677656b43b37a30dfad4a3b3e2935.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2448
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\oozsgpdd\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4184
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\igqooend.exe" C:\Windows\SysWOW64\oozsgpdd\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4624
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create oozsgpdd binPath= "C:\Windows\SysWOW64\oozsgpdd\igqooend.exe /d\"C:\Users\Admin\AppData\Local\Temp\181e6f88cf32348d8247bb3c4deb07bf44b677656b43b37a30dfad4a3b3e2935.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:392
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description oozsgpdd "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3540
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start oozsgpdd
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2668
- 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:556
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2448 -s 1248
  2⤵
  - Program crash
  PID:4596

C:\Windows\SysWOW64\oozsgpdd\igqooend.exe
C:\Windows\SysWOW64\oozsgpdd\igqooend.exe /d"C:\Users\Admin\AppData\Local\Temp\181e6f88cf32348d8247bb3c4deb07bf44b677656b43b37a30dfad4a3b3e2935.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3536
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:2324
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3536 -s 480
  2⤵
  - Program crash
  PID:984

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 2448 -ip 2448
1⤵
PID:4356

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 448 -p 3536 -ip 3536
1⤵
PID:1848

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\igqooend.exe

Filesize
13.1MB

MD5
5034af4f5376fca25481a378659ee9c8

SHA1
ae17756e2ef123d89bb53b3771d729bae576ee36

SHA256
4a956ee46d3e0ebce69919344fd84d19d448142b2e89086f1e2bb29439e01880

SHA512
f2717a5a01f21a5c4517c9dc4c6877b7b33cfbe08683904a5c3f23a2075dc43b3636bf6ab745ea1ce426b59e2b7c85d789855e2f2bdf4a52ac45778a7f045ecd

Download Submit
memory/2324-15-0x00000000009D0000-0x00000000009E5000-memory.dmp

Filesize
84KB

Download
memory/2324-13-0x00000000009D0000-0x00000000009E5000-memory.dmp

Filesize
84KB

Download
memory/2324-17-0x00000000009D0000-0x00000000009E5000-memory.dmp

Filesize
84KB

Download
memory/2448-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2448-2-0x00000000001C0000-0x00000000001D3000-memory.dmp

Filesize
76KB

Download
memory/2448-10-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2448-9-0x00000000001C0000-0x00000000001D3000-memory.dmp

Filesize
76KB

Download
memory/2448-8-0x0000000000400000-0x0000000000871000-memory.dmp

Filesize
4.4MB

Download
memory/2448-1-0x00000000009E0000-0x0000000000AE0000-memory.dmp

Filesize
1024KB

Download
memory/3536-12-0x0000000000400000-0x0000000000871000-memory.dmp

Filesize
4.4MB

Download
memory/3536-16-0x0000000000400000-0x0000000000871000-memory.dmp

Filesize
4.4MB

Download
memory/3536-11-0x0000000000400000-0x0000000000871000-memory.dmp

Filesize
4.4MB

Download
memory/3536-19-0x0000000000400000-0x0000000000871000-memory.dmp

Filesize
4.4MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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