tofsee | 65355c0a686d8ba5f7551152571545331d64fe207a4f6c44ae67b240f3cbb19c

General

Target

4fb9ec0883d7b509a16d73e2181f5236d13042706cb8bbe82091f8a9db4575d1.exe
Size

12.5MB
MD5

c4c9428ea6a30325f8ac6a3fecc199a1
SHA1

e8c27d01e8e1b4f11f6183e8ba4b3065392349ce
SHA256

4fb9ec0883d7b509a16d73e2181f5236d13042706cb8bbe82091f8a9db4575d1
SHA512

b052061f5936ee2f30fc18e81daa9542451a1ad58235bd180e7d01fa49977813945492890a1a37a3cec59bb261a626cd175f12ac85bec9e000273159980e7a33
SSDEEP

196608:TPRMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMP:T

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
1896	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\tsyhuvpk\ImagePath = "C:\\Windows\\SysWOW64\\tsyhuvpk\\dpwqvbow.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-1-5-21-1302416131-1437503476-2806442725-1000\Control Panel\International\Geo\Nation	4fb9ec0883d7b509a16d73e2181f5236d13042706cb8bbe82091f8a9db4575d1.exe

Deletes itself 1 IoCs

pid	Process
4532	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
4228	dpwqvbow.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4228 set thread context of 4532	4228	dpwqvbow.exe	106

Launches sc.exe 3 IoCs

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

pid	Process
1384	sc.exe
3608	sc.exe
3784	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
3304	1768	WerFault.exe	83
3684	4228	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	netsh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	dpwqvbow.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	4fb9ec0883d7b509a16d73e2181f5236d13042706cb8bbe82091f8a9db4575d1.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 23 IoCs

description	pid	Process	procid_target
PID 1768 wrote to memory of 5068	1768	4fb9ec0883d7b509a16d73e2181f5236d13042706cb8bbe82091f8a9db4575d1.exe	87
PID 1768 wrote to memory of 5068	1768	4fb9ec0883d7b509a16d73e2181f5236d13042706cb8bbe82091f8a9db4575d1.exe	87
PID 1768 wrote to memory of 5068	1768	4fb9ec0883d7b509a16d73e2181f5236d13042706cb8bbe82091f8a9db4575d1.exe	87
PID 1768 wrote to memory of 2860	1768	4fb9ec0883d7b509a16d73e2181f5236d13042706cb8bbe82091f8a9db4575d1.exe	89
PID 1768 wrote to memory of 2860	1768	4fb9ec0883d7b509a16d73e2181f5236d13042706cb8bbe82091f8a9db4575d1.exe	89
PID 1768 wrote to memory of 2860	1768	4fb9ec0883d7b509a16d73e2181f5236d13042706cb8bbe82091f8a9db4575d1.exe	89
PID 1768 wrote to memory of 1384	1768	4fb9ec0883d7b509a16d73e2181f5236d13042706cb8bbe82091f8a9db4575d1.exe	91
PID 1768 wrote to memory of 1384	1768	4fb9ec0883d7b509a16d73e2181f5236d13042706cb8bbe82091f8a9db4575d1.exe	91
PID 1768 wrote to memory of 1384	1768	4fb9ec0883d7b509a16d73e2181f5236d13042706cb8bbe82091f8a9db4575d1.exe	91
PID 1768 wrote to memory of 3608	1768	4fb9ec0883d7b509a16d73e2181f5236d13042706cb8bbe82091f8a9db4575d1.exe	93
PID 1768 wrote to memory of 3608	1768	4fb9ec0883d7b509a16d73e2181f5236d13042706cb8bbe82091f8a9db4575d1.exe	93
PID 1768 wrote to memory of 3608	1768	4fb9ec0883d7b509a16d73e2181f5236d13042706cb8bbe82091f8a9db4575d1.exe	93
PID 1768 wrote to memory of 3784	1768	4fb9ec0883d7b509a16d73e2181f5236d13042706cb8bbe82091f8a9db4575d1.exe	97
PID 1768 wrote to memory of 3784	1768	4fb9ec0883d7b509a16d73e2181f5236d13042706cb8bbe82091f8a9db4575d1.exe	97
PID 1768 wrote to memory of 3784	1768	4fb9ec0883d7b509a16d73e2181f5236d13042706cb8bbe82091f8a9db4575d1.exe	97
PID 1768 wrote to memory of 1896	1768	4fb9ec0883d7b509a16d73e2181f5236d13042706cb8bbe82091f8a9db4575d1.exe	100
PID 1768 wrote to memory of 1896	1768	4fb9ec0883d7b509a16d73e2181f5236d13042706cb8bbe82091f8a9db4575d1.exe	100
PID 1768 wrote to memory of 1896	1768	4fb9ec0883d7b509a16d73e2181f5236d13042706cb8bbe82091f8a9db4575d1.exe	100
PID 4228 wrote to memory of 4532	4228	dpwqvbow.exe	106
PID 4228 wrote to memory of 4532	4228	dpwqvbow.exe	106
PID 4228 wrote to memory of 4532	4228	dpwqvbow.exe	106
PID 4228 wrote to memory of 4532	4228	dpwqvbow.exe	106
PID 4228 wrote to memory of 4532	4228	dpwqvbow.exe	106

C:\Users\Admin\AppData\Local\Temp\4fb9ec0883d7b509a16d73e2181f5236d13042706cb8bbe82091f8a9db4575d1.exe
"C:\Users\Admin\AppData\Local\Temp\4fb9ec0883d7b509a16d73e2181f5236d13042706cb8bbe82091f8a9db4575d1.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1768
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\tsyhuvpk\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:5068
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\dpwqvbow.exe" C:\Windows\SysWOW64\tsyhuvpk\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2860
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create tsyhuvpk binPath= "C:\Windows\SysWOW64\tsyhuvpk\dpwqvbow.exe /d\"C:\Users\Admin\AppData\Local\Temp\4fb9ec0883d7b509a16d73e2181f5236d13042706cb8bbe82091f8a9db4575d1.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:1384
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description tsyhuvpk "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3608
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start tsyhuvpk
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3784
- 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:1896
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1768 -s 888
  2⤵
  - Program crash
  PID:3304

C:\Windows\SysWOW64\tsyhuvpk\dpwqvbow.exe
C:\Windows\SysWOW64\tsyhuvpk\dpwqvbow.exe /d"C:\Users\Admin\AppData\Local\Temp\4fb9ec0883d7b509a16d73e2181f5236d13042706cb8bbe82091f8a9db4575d1.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4228
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:4532
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4228 -s 512
  2⤵
  - Program crash
  PID:3684

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 184 -p 1768 -ip 1768
1⤵
PID:4312

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 524 -p 4228 -ip 4228
1⤵
PID:2124

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\dpwqvbow.exe

Filesize
14.2MB

MD5
3bf6f34578f196937640e2b3dd913a49

SHA1
1c418f747ac30a525653eb354cfd33c53a467f5c

SHA256
ede636ab4f977b4f746690abc5a03ae41b729fca5effcaf7d629aac1d69843a6

SHA512
f4c4415984a9ce25dd2dc4b4242808941520bc45bf6bd39f744b1c270e36480f4b4f168d2f499c15a791bf948b4427a6c22fedc3eaaaeef581d5da276ba6b208

Download Submit
memory/1768-1-0x00007FFA3CED0000-0x00007FFA3D0C5000-memory.dmp

Filesize
2.0MB

Download
memory/1768-6-0x0000000000400000-0x0000000000871000-memory.dmp

Filesize
4.4MB

Download
memory/1768-7-0x00007FFA3CED0000-0x00007FFA3D0C5000-memory.dmp

Filesize
2.0MB

Download
memory/4228-8-0x00007FFA3CED0000-0x00007FFA3D0C5000-memory.dmp

Filesize
2.0MB

Download
memory/4228-13-0x0000000000400000-0x0000000000871000-memory.dmp

Filesize
4.4MB

Download
memory/4532-9-0x0000000000B20000-0x0000000000B35000-memory.dmp

Filesize
84KB

Download
memory/4532-11-0x0000000000B20000-0x0000000000B35000-memory.dmp

Filesize
84KB

Download
memory/4532-12-0x0000000000B20000-0x0000000000B35000-memory.dmp

Filesize
84KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads