tofsee | f5c15d971f2824020af57ff36b008cc53ed66317265d71cfca608b71c12ff20b

General

Target

f5c15d971f2824020af57ff36b008cc53ed66317265d71cfca608b71c12ff20b.exe
Size

10.5MB
MD5

b1a079f8d123d30d1596fe89a9d1192c
SHA1

e0f080d8e6dec62ad76c01ba9c575f7eae6c1e1b
SHA256

f5c15d971f2824020af57ff36b008cc53ed66317265d71cfca608b71c12ff20b
SHA512

1b1d1c5d05bf90331305c75a16d474771c5f46aae0d5236aa0428c08debc307db6c25a5c8008bad657a9358754cef7b1f78c4d09e6ffa0389714d673e1c00783
SSDEEP

6144:fZDhTWrhgUaxjFftGu35QZ+2PPFGrGuislc03r:fZDhTWrhgUWFfMuP0FGqb/0

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
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
1192	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\hcpgyszx\ImagePath = "C:\\Windows\\SysWOW64\\hcpgyszx\\lsvtuuky.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-1-5-21-3350944739-639801879-157714471-1000\Control Panel\International\Geo\Nation	f5c15d971f2824020af57ff36b008cc53ed66317265d71cfca608b71c12ff20b.exe

Deletes itself 1 IoCs

pid	Process
924	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
1788	lsvtuuky.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1788 set thread context of 924	1788	lsvtuuky.exe	101

Launches sc.exe 3 IoCs

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

pid	Process
2704	sc.exe
2792	sc.exe
396	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 queried	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe
Key value enumerated	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe
Key opened	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe

Program crash 2 IoCs

pid	pid_target	Process	procid_target
4916	2272	WerFault.exe	82
2776	1788	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	f5c15d971f2824020af57ff36b008cc53ed66317265d71cfca608b71c12ff20b.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	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
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	lsvtuuky.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 2272 wrote to memory of 636	2272	f5c15d971f2824020af57ff36b008cc53ed66317265d71cfca608b71c12ff20b.exe	83
PID 2272 wrote to memory of 636	2272	f5c15d971f2824020af57ff36b008cc53ed66317265d71cfca608b71c12ff20b.exe	83
PID 2272 wrote to memory of 636	2272	f5c15d971f2824020af57ff36b008cc53ed66317265d71cfca608b71c12ff20b.exe	83
PID 2272 wrote to memory of 4332	2272	f5c15d971f2824020af57ff36b008cc53ed66317265d71cfca608b71c12ff20b.exe	85
PID 2272 wrote to memory of 4332	2272	f5c15d971f2824020af57ff36b008cc53ed66317265d71cfca608b71c12ff20b.exe	85
PID 2272 wrote to memory of 4332	2272	f5c15d971f2824020af57ff36b008cc53ed66317265d71cfca608b71c12ff20b.exe	85
PID 2272 wrote to memory of 2792	2272	f5c15d971f2824020af57ff36b008cc53ed66317265d71cfca608b71c12ff20b.exe	87
PID 2272 wrote to memory of 2792	2272	f5c15d971f2824020af57ff36b008cc53ed66317265d71cfca608b71c12ff20b.exe	87
PID 2272 wrote to memory of 2792	2272	f5c15d971f2824020af57ff36b008cc53ed66317265d71cfca608b71c12ff20b.exe	87
PID 2272 wrote to memory of 396	2272	f5c15d971f2824020af57ff36b008cc53ed66317265d71cfca608b71c12ff20b.exe	90
PID 2272 wrote to memory of 396	2272	f5c15d971f2824020af57ff36b008cc53ed66317265d71cfca608b71c12ff20b.exe	90
PID 2272 wrote to memory of 396	2272	f5c15d971f2824020af57ff36b008cc53ed66317265d71cfca608b71c12ff20b.exe	90
PID 2272 wrote to memory of 2704	2272	f5c15d971f2824020af57ff36b008cc53ed66317265d71cfca608b71c12ff20b.exe	92
PID 2272 wrote to memory of 2704	2272	f5c15d971f2824020af57ff36b008cc53ed66317265d71cfca608b71c12ff20b.exe	92
PID 2272 wrote to memory of 2704	2272	f5c15d971f2824020af57ff36b008cc53ed66317265d71cfca608b71c12ff20b.exe	92
PID 2272 wrote to memory of 1192	2272	f5c15d971f2824020af57ff36b008cc53ed66317265d71cfca608b71c12ff20b.exe	95
PID 2272 wrote to memory of 1192	2272	f5c15d971f2824020af57ff36b008cc53ed66317265d71cfca608b71c12ff20b.exe	95
PID 2272 wrote to memory of 1192	2272	f5c15d971f2824020af57ff36b008cc53ed66317265d71cfca608b71c12ff20b.exe	95
PID 1788 wrote to memory of 924	1788	lsvtuuky.exe	101
PID 1788 wrote to memory of 924	1788	lsvtuuky.exe	101
PID 1788 wrote to memory of 924	1788	lsvtuuky.exe	101
PID 1788 wrote to memory of 924	1788	lsvtuuky.exe	101
PID 1788 wrote to memory of 924	1788	lsvtuuky.exe	101

C:\Users\Admin\AppData\Local\Temp\f5c15d971f2824020af57ff36b008cc53ed66317265d71cfca608b71c12ff20b.exe
"C:\Users\Admin\AppData\Local\Temp\f5c15d971f2824020af57ff36b008cc53ed66317265d71cfca608b71c12ff20b.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2272
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\hcpgyszx\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:636
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\lsvtuuky.exe" C:\Windows\SysWOW64\hcpgyszx\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4332
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create hcpgyszx binPath= "C:\Windows\SysWOW64\hcpgyszx\lsvtuuky.exe /d\"C:\Users\Admin\AppData\Local\Temp\f5c15d971f2824020af57ff36b008cc53ed66317265d71cfca608b71c12ff20b.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2792
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description hcpgyszx "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:396
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start hcpgyszx
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2704
- 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:1192
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2272 -s 1212
  2⤵
  - Program crash
  PID:4916

C:\Windows\SysWOW64\hcpgyszx\lsvtuuky.exe
C:\Windows\SysWOW64\hcpgyszx\lsvtuuky.exe /d"C:\Users\Admin\AppData\Local\Temp\f5c15d971f2824020af57ff36b008cc53ed66317265d71cfca608b71c12ff20b.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1788
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:924
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1788 -s 524
  2⤵
  - Program crash
  PID:2776

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 448 -p 2272 -ip 2272
1⤵
PID:2388

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 460 -p 1788 -ip 1788
1⤵
PID:1500

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\lsvtuuky.exe

Filesize
11.7MB

MD5
9f6435201d1abd029cfd615acf580e28

SHA1
658b7dca414a5d1967e96650754dd03d465205c0

SHA256
af31ce7f3e0ca686a8156e8ce9fbee6b5439b70c98b46bfd8cc135bbeb13e5d2

SHA512
b6c4e2b7847e1489e659e17e9e356e05585d35b3ea328fa6b8bb8b344ed637d6df88cae035412967cfe7afdf97a3226cb7b0aae760c2848bd2eb5af56e34a48f

Download Submit
memory/924-12-0x0000000001090000-0x00000000010A5000-memory.dmp

Filesize
84KB

Download
memory/924-17-0x0000000001090000-0x00000000010A5000-memory.dmp

Filesize
84KB

Download
memory/924-14-0x0000000001090000-0x00000000010A5000-memory.dmp

Filesize
84KB

Download
memory/1788-16-0x0000000000400000-0x0000000000878000-memory.dmp

Filesize
4.5MB

Download
memory/1788-11-0x0000000000400000-0x0000000000878000-memory.dmp

Filesize
4.5MB

Download
memory/1788-15-0x0000000000400000-0x0000000000878000-memory.dmp

Filesize
4.5MB

Download
memory/2272-10-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2272-9-0x00000000008F0000-0x0000000000903000-memory.dmp

Filesize
76KB

Download
memory/2272-8-0x0000000000400000-0x0000000000878000-memory.dmp

Filesize
4.5MB

Download
memory/2272-1-0x00000000009B0000-0x0000000000AB0000-memory.dmp

Filesize
1024KB

Download
memory/2272-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2272-2-0x00000000008F0000-0x0000000000903000-memory.dmp

Filesize
76KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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