tofsee | 73a8b9c09314a9b07e418584d3f1702ca82a96054227a68abf00cd0488b15d44

General

Target

38a30aee82cdd8e5338e168d99fdce7b8e032a89da64e48751b2e45f9d50ad13.exe
Size

350KB
MD5

fd449b229977fbbdaf1458a6753ca2f5
SHA1

b854dec813042816a243aa28e0bbabbe5bb84748
SHA256

38a30aee82cdd8e5338e168d99fdce7b8e032a89da64e48751b2e45f9d50ad13
SHA512

6192ce8e0becb960e082f2b5c1be1e01e8af718b6dbf579c12d5110dd1965f1554143efecfa733b80e43d91fd46f7601113a25c31030b21cfca54aad7f378e7b
SSDEEP

6144:UZF8S00N4dKCSi01IthnHYKKTsVB+6qlYUjUTjENs7Da7zRr:Uv8Sxi1jnHYhTsVB+TVo8W6zt

Score

10^/10

tofsee discovery evasion execution persistence privilege_escalation trojan

Malware Config

Extracted

Family

tofsee

C2

patmushta.info

ovicrush.cn

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
4944	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\wxsrbddj\ImagePath = "C:\\Windows\\SysWOW64\\wxsrbddj\\uxnmfhor.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-1-5-21-493223053-2004649691-1575712786-1000\Control Panel\International\Geo\Nation	38a30aee82cdd8e5338e168d99fdce7b8e032a89da64e48751b2e45f9d50ad13.exe

Deletes itself 1 IoCs

pid	Process
5092	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
772	uxnmfhor.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 772 set thread context of 5092	772	uxnmfhor.exe	101

Launches sc.exe 3 IoCs

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

pid	Process
3344	sc.exe
4084	sc.exe
3388	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
1708	1312	WerFault.exe	82
2264	772	WerFault.exe	94

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	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	uxnmfhor.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	38a30aee82cdd8e5338e168d99fdce7b8e032a89da64e48751b2e45f9d50ad13.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
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	netsh.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 1312 wrote to memory of 4620	1312	38a30aee82cdd8e5338e168d99fdce7b8e032a89da64e48751b2e45f9d50ad13.exe	83
PID 1312 wrote to memory of 4620	1312	38a30aee82cdd8e5338e168d99fdce7b8e032a89da64e48751b2e45f9d50ad13.exe	83
PID 1312 wrote to memory of 4620	1312	38a30aee82cdd8e5338e168d99fdce7b8e032a89da64e48751b2e45f9d50ad13.exe	83
PID 1312 wrote to memory of 2044	1312	38a30aee82cdd8e5338e168d99fdce7b8e032a89da64e48751b2e45f9d50ad13.exe	85
PID 1312 wrote to memory of 2044	1312	38a30aee82cdd8e5338e168d99fdce7b8e032a89da64e48751b2e45f9d50ad13.exe	85
PID 1312 wrote to memory of 2044	1312	38a30aee82cdd8e5338e168d99fdce7b8e032a89da64e48751b2e45f9d50ad13.exe	85
PID 1312 wrote to memory of 3344	1312	38a30aee82cdd8e5338e168d99fdce7b8e032a89da64e48751b2e45f9d50ad13.exe	87
PID 1312 wrote to memory of 3344	1312	38a30aee82cdd8e5338e168d99fdce7b8e032a89da64e48751b2e45f9d50ad13.exe	87
PID 1312 wrote to memory of 3344	1312	38a30aee82cdd8e5338e168d99fdce7b8e032a89da64e48751b2e45f9d50ad13.exe	87
PID 1312 wrote to memory of 4084	1312	38a30aee82cdd8e5338e168d99fdce7b8e032a89da64e48751b2e45f9d50ad13.exe	89
PID 1312 wrote to memory of 4084	1312	38a30aee82cdd8e5338e168d99fdce7b8e032a89da64e48751b2e45f9d50ad13.exe	89
PID 1312 wrote to memory of 4084	1312	38a30aee82cdd8e5338e168d99fdce7b8e032a89da64e48751b2e45f9d50ad13.exe	89
PID 1312 wrote to memory of 3388	1312	38a30aee82cdd8e5338e168d99fdce7b8e032a89da64e48751b2e45f9d50ad13.exe	92
PID 1312 wrote to memory of 3388	1312	38a30aee82cdd8e5338e168d99fdce7b8e032a89da64e48751b2e45f9d50ad13.exe	92
PID 1312 wrote to memory of 3388	1312	38a30aee82cdd8e5338e168d99fdce7b8e032a89da64e48751b2e45f9d50ad13.exe	92
PID 1312 wrote to memory of 4944	1312	38a30aee82cdd8e5338e168d99fdce7b8e032a89da64e48751b2e45f9d50ad13.exe	95
PID 1312 wrote to memory of 4944	1312	38a30aee82cdd8e5338e168d99fdce7b8e032a89da64e48751b2e45f9d50ad13.exe	95
PID 1312 wrote to memory of 4944	1312	38a30aee82cdd8e5338e168d99fdce7b8e032a89da64e48751b2e45f9d50ad13.exe	95
PID 772 wrote to memory of 5092	772	uxnmfhor.exe	101
PID 772 wrote to memory of 5092	772	uxnmfhor.exe	101
PID 772 wrote to memory of 5092	772	uxnmfhor.exe	101
PID 772 wrote to memory of 5092	772	uxnmfhor.exe	101
PID 772 wrote to memory of 5092	772	uxnmfhor.exe	101

C:\Users\Admin\AppData\Local\Temp\38a30aee82cdd8e5338e168d99fdce7b8e032a89da64e48751b2e45f9d50ad13.exe
"C:\Users\Admin\AppData\Local\Temp\38a30aee82cdd8e5338e168d99fdce7b8e032a89da64e48751b2e45f9d50ad13.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1312
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\wxsrbddj\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4620
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\uxnmfhor.exe" C:\Windows\SysWOW64\wxsrbddj\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2044
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create wxsrbddj binPath= "C:\Windows\SysWOW64\wxsrbddj\uxnmfhor.exe /d\"C:\Users\Admin\AppData\Local\Temp\38a30aee82cdd8e5338e168d99fdce7b8e032a89da64e48751b2e45f9d50ad13.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3344
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description wxsrbddj "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4084
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start wxsrbddj
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3388
- 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:4944
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1312 -s 1264
  2⤵
  - Program crash
  PID:1708

C:\Windows\SysWOW64\wxsrbddj\uxnmfhor.exe
C:\Windows\SysWOW64\wxsrbddj\uxnmfhor.exe /d"C:\Users\Admin\AppData\Local\Temp\38a30aee82cdd8e5338e168d99fdce7b8e032a89da64e48751b2e45f9d50ad13.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:772
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:5092
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 772 -s 512
  2⤵
  - Program crash
  PID:2264

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 448 -p 1312 -ip 1312
1⤵
PID:1764

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 532 -p 772 -ip 772
1⤵
PID:3596

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\uxnmfhor.exe

Filesize
14.6MB

MD5
6090af1e7991aa757b88facad5d6111c

SHA1
e643dc9b212aaad6a1f3ef8d3d7c836c0c9d646c

SHA256
2daa50b20fc466c29157cc7313e9045bd805d5061d893131133a3e56ff4459b0

SHA512
2eb47912785f5d3e3718d46aba8c44012cb51d8887b09d501fe25cd9d86f54211710ea2ac05da06ab009d036ca6a897c0975a780037fd0b08024daf236327ef4

Download Submit
memory/772-8-0x0000000000400000-0x00000000004DC000-memory.dmp

Filesize
880KB

Download
memory/772-15-0x0000000000400000-0x00000000004DC000-memory.dmp

Filesize
880KB

Download
memory/1312-1-0x00000000007B0000-0x00000000008B0000-memory.dmp

Filesize
1024KB

Download
memory/1312-2-0x0000000000780000-0x0000000000793000-memory.dmp

Filesize
76KB

Download
memory/1312-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/1312-11-0x0000000000400000-0x00000000004DC000-memory.dmp

Filesize
880KB

Download
memory/1312-12-0x0000000000780000-0x0000000000793000-memory.dmp

Filesize
76KB

Download
memory/1312-13-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/5092-9-0x0000000000720000-0x0000000000735000-memory.dmp

Filesize
84KB

Download
memory/5092-16-0x0000000000720000-0x0000000000735000-memory.dmp

Filesize
84KB

Download
memory/5092-17-0x0000000000720000-0x0000000000735000-memory.dmp

Filesize
84KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads