tofsee | 04594d5a85f6667c27f9667295841af5f9893f20e74ddd23dc156d63b7aa95cd

General

Target

04594d5a85f6667c27f9667295841af5f9893f20e74ddd23dc156d63b7aa95cd.exe
Size

14.9MB
MD5

f757a10679f8aedd434b42cbf4bd0059
SHA1

2225607c93de06054c8321c098f192de5314f5c4
SHA256

04594d5a85f6667c27f9667295841af5f9893f20e74ddd23dc156d63b7aa95cd
SHA512

da964e6fdfd5a17b3733abae3bd94d33d1662a728c1441ed7fc04aa0415f3105b1897e2b6e644d855680e08d4498a3b57c16f8a0892f7a7e79159eb8903c5e91
SSDEEP

49152:FkHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHl:y

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

Processes:

netsh.exe

pid process

2268 netsh.exe

pid	process
2268	netsh.exe

Sets service image path in registry 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

svchost.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\uqcgoyso\ImagePath = "C:\\Windows\\SysWOW64\\uqcgoyso\\yrfrjdfs.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

Processes:

04594d5a85f6667c27f9667295841af5f9893f20e74ddd23dc156d63b7aa95cd.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-940901362-3608833189-1915618603-1000\Control Panel\International\Geo\Nation	04594d5a85f6667c27f9667295841af5f9893f20e74ddd23dc156d63b7aa95cd.exe

Deletes itself 1 IoCs

Processes:

svchost.exe

pid process

2124 svchost.exe
Executes dropped EXE 1 IoCs

Processes:

yrfrjdfs.exe

pid process

3112 yrfrjdfs.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

yrfrjdfs.exe

description pid process target process

PID 3112 set thread context of 2124 3112 yrfrjdfs.exe svchost.exe
Launches sc.exe 3 IoCs
Sc.exe is a Windows utlilty to control services on the system.

Processes:

sc.exesc.exesc.exe

pid process

1932 sc.exe
1748 sc.exe
5036 sc.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
2124	svchost.exe

pid	process
3112	yrfrjdfs.exe

description	pid	process	target process
PID 3112 set thread context of 2124	3112	yrfrjdfs.exe	svchost.exe

pid	process
1932	sc.exe
1748	sc.exe
5036	sc.exe

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

Processes:

netsh.exe

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

Processes:

WerFault.exeWerFault.exe

pid	pid_target	process	target process
1756	3480	WerFault.exe	04594d5a85f6667c27f9667295841af5f9893f20e74ddd23dc156d63b7aa95cd.exe
4812	3112	WerFault.exe	yrfrjdfs.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

Processes:

04594d5a85f6667c27f9667295841af5f9893f20e74ddd23dc156d63b7aa95cd.execmd.exenetsh.exeyrfrjdfs.exesvchost.execmd.exesc.exesc.exesc.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	04594d5a85f6667c27f9667295841af5f9893f20e74ddd23dc156d63b7aa95cd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	netsh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	yrfrjdfs.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	sc.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 23 IoCs

Processes:

04594d5a85f6667c27f9667295841af5f9893f20e74ddd23dc156d63b7aa95cd.exeyrfrjdfs.exe

description	pid	process	target process
PID 3480 wrote to memory of 320	3480	04594d5a85f6667c27f9667295841af5f9893f20e74ddd23dc156d63b7aa95cd.exe	cmd.exe
PID 3480 wrote to memory of 320	3480	04594d5a85f6667c27f9667295841af5f9893f20e74ddd23dc156d63b7aa95cd.exe	cmd.exe
PID 3480 wrote to memory of 320	3480	04594d5a85f6667c27f9667295841af5f9893f20e74ddd23dc156d63b7aa95cd.exe	cmd.exe
PID 3480 wrote to memory of 860	3480	04594d5a85f6667c27f9667295841af5f9893f20e74ddd23dc156d63b7aa95cd.exe	cmd.exe
PID 3480 wrote to memory of 860	3480	04594d5a85f6667c27f9667295841af5f9893f20e74ddd23dc156d63b7aa95cd.exe	cmd.exe
PID 3480 wrote to memory of 860	3480	04594d5a85f6667c27f9667295841af5f9893f20e74ddd23dc156d63b7aa95cd.exe	cmd.exe
PID 3480 wrote to memory of 1932	3480	04594d5a85f6667c27f9667295841af5f9893f20e74ddd23dc156d63b7aa95cd.exe	sc.exe
PID 3480 wrote to memory of 1932	3480	04594d5a85f6667c27f9667295841af5f9893f20e74ddd23dc156d63b7aa95cd.exe	sc.exe
PID 3480 wrote to memory of 1932	3480	04594d5a85f6667c27f9667295841af5f9893f20e74ddd23dc156d63b7aa95cd.exe	sc.exe
PID 3480 wrote to memory of 1748	3480	04594d5a85f6667c27f9667295841af5f9893f20e74ddd23dc156d63b7aa95cd.exe	sc.exe
PID 3480 wrote to memory of 1748	3480	04594d5a85f6667c27f9667295841af5f9893f20e74ddd23dc156d63b7aa95cd.exe	sc.exe
PID 3480 wrote to memory of 1748	3480	04594d5a85f6667c27f9667295841af5f9893f20e74ddd23dc156d63b7aa95cd.exe	sc.exe
PID 3480 wrote to memory of 5036	3480	04594d5a85f6667c27f9667295841af5f9893f20e74ddd23dc156d63b7aa95cd.exe	sc.exe
PID 3480 wrote to memory of 5036	3480	04594d5a85f6667c27f9667295841af5f9893f20e74ddd23dc156d63b7aa95cd.exe	sc.exe
PID 3480 wrote to memory of 5036	3480	04594d5a85f6667c27f9667295841af5f9893f20e74ddd23dc156d63b7aa95cd.exe	sc.exe
PID 3480 wrote to memory of 2268	3480	04594d5a85f6667c27f9667295841af5f9893f20e74ddd23dc156d63b7aa95cd.exe	netsh.exe
PID 3480 wrote to memory of 2268	3480	04594d5a85f6667c27f9667295841af5f9893f20e74ddd23dc156d63b7aa95cd.exe	netsh.exe
PID 3480 wrote to memory of 2268	3480	04594d5a85f6667c27f9667295841af5f9893f20e74ddd23dc156d63b7aa95cd.exe	netsh.exe
PID 3112 wrote to memory of 2124	3112	yrfrjdfs.exe	svchost.exe
PID 3112 wrote to memory of 2124	3112	yrfrjdfs.exe	svchost.exe
PID 3112 wrote to memory of 2124	3112	yrfrjdfs.exe	svchost.exe
PID 3112 wrote to memory of 2124	3112	yrfrjdfs.exe	svchost.exe
PID 3112 wrote to memory of 2124	3112	yrfrjdfs.exe	svchost.exe

C:\Users\Admin\AppData\Local\Temp\04594d5a85f6667c27f9667295841af5f9893f20e74ddd23dc156d63b7aa95cd.exe
"C:\Users\Admin\AppData\Local\Temp\04594d5a85f6667c27f9667295841af5f9893f20e74ddd23dc156d63b7aa95cd.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3480
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\uqcgoyso\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:320
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\yrfrjdfs.exe" C:\Windows\SysWOW64\uqcgoyso\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:860
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create uqcgoyso binPath= "C:\Windows\SysWOW64\uqcgoyso\yrfrjdfs.exe /d\"C:\Users\Admin\AppData\Local\Temp\04594d5a85f6667c27f9667295841af5f9893f20e74ddd23dc156d63b7aa95cd.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:1932
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description uqcgoyso "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:1748
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start uqcgoyso
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:5036
- 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:2268
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3480 -s 1040
  2⤵
  - Program crash
  PID:1756

C:\Windows\SysWOW64\uqcgoyso\yrfrjdfs.exe
C:\Windows\SysWOW64\uqcgoyso\yrfrjdfs.exe /d"C:\Users\Admin\AppData\Local\Temp\04594d5a85f6667c27f9667295841af5f9893f20e74ddd23dc156d63b7aa95cd.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3112
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:2124
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3112 -s 532
  2⤵
  - Program crash
  PID:4812

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 3480 -ip 3480
1⤵
PID:312

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 420 -p 3112 -ip 3112
1⤵
PID:1240

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\yrfrjdfs.exe

Filesize
12.2MB

MD5
9fb873513759918345b380e3601e0bf1

SHA1
b040e37c8e4191c3dcca0c62b726929037205b42

SHA256
cfcd2582a36f0f74e009eb5ebec31dbea893561a98557fb9ab8a823d51deffa9

SHA512
b02777eea66f378b43a1574a6aa6e6fe3ba3905f8e291536f67e63d05ff928d085523cc37018dac985632e34e148644f911d2cc3fea970f8a5d82041d7e33224

Download Submit
memory/2124-12-0x00000000003C0000-0x00000000003D5000-memory.dmp

Filesize
84KB

Download
memory/2124-14-0x00000000003C0000-0x00000000003D5000-memory.dmp

Filesize
84KB

Download
memory/2124-15-0x00000000003C0000-0x00000000003D5000-memory.dmp

Filesize
84KB

Download
memory/3112-11-0x0000000000400000-0x0000000000785000-memory.dmp

Filesize
3.5MB

Download
memory/3112-17-0x0000000000400000-0x0000000000785000-memory.dmp

Filesize
3.5MB

Download
memory/3480-1-0x00000000008A0000-0x00000000009A0000-memory.dmp

Filesize
1024KB

Download
memory/3480-2-0x0000000000820000-0x0000000000833000-memory.dmp

Filesize
76KB

Download
memory/3480-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/3480-10-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/3480-9-0x0000000000820000-0x0000000000833000-memory.dmp

Filesize
76KB

Download
memory/3480-8-0x0000000000400000-0x0000000000785000-memory.dmp

Filesize
3.5MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads