tofsee | 2563e3d6d4c2a649c74dc12e6f361723e9ccb6ff5405928db9279311be996e01

General

Target

2563e3d6d4c2a649c74dc12e6f361723e9ccb6ff5405928db9279311be996e01N.exe
Size

179KB
MD5

34e79a57341c6f1742e6c342faa1aef0
SHA1

57949ba2e6f262fe075f2dd5846c4a5f3b3da8aa
SHA256

2563e3d6d4c2a649c74dc12e6f361723e9ccb6ff5405928db9279311be996e01
SHA512

36f8b826da188d4265b2a68a8a8053b74e18ae96ec12ecda19be3e19a9fa7558a201370f8a556dba9df4ea371a21f6c9848f7882486c55b74fbc8665f71ac1cd
SSDEEP

3072:npTvjrvSCFMGIZqYSVU2cxi2b8YSispChVn/30LvgHPDRuVlSTPW3N30:nJ3v1FzIZqYyU2+EYokhVn/kz2PDEVQ

Score

10^/10

tofsee defense_evasion discovery execution persistence privilege_escalation trojan upx

Malware Config

Extracted

Family

tofsee

C2

43.231.4.7

lazystax.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

defense_evasion

Windows Service

T1543.003

Disable or Modify System Firewall

T1562.004

pid	Process
1800	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\ybvgfoj\ImagePath = "C:\\Windows\\SysWOW64\\ybvgfoj\\gtfcvinx.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-1-5-21-3625106387-4207083342-115176794-1000\Control Panel\International\Geo\Nation	2563e3d6d4c2a649c74dc12e6f361723e9ccb6ff5405928db9279311be996e01N.exe

Deletes itself 1 IoCs

pid	Process
3880	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
1980	gtfcvinx.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1980 set thread context of 3880	1980	gtfcvinx.exe	104

UPX packed file 2 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral2/memory/2760-1-0x0000000000400000-0x0000000004C4C000-memory.dmp	upx
behavioral2/files/0x000c000000023b8e-5.dat	upx

Launches sc.exe 3 IoCs

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

pid	Process
4820	sc.exe
1520	sc.exe
4304	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
4696	1980	WerFault.exe	97
5100	2760	WerFault.exe	82

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	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2563e3d6d4c2a649c74dc12e6f361723e9ccb6ff5405928db9279311be996e01N.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	gtfcvinx.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 2760 wrote to memory of 3076	2760	2563e3d6d4c2a649c74dc12e6f361723e9ccb6ff5405928db9279311be996e01N.exe	83
PID 2760 wrote to memory of 3076	2760	2563e3d6d4c2a649c74dc12e6f361723e9ccb6ff5405928db9279311be996e01N.exe	83
PID 2760 wrote to memory of 3076	2760	2563e3d6d4c2a649c74dc12e6f361723e9ccb6ff5405928db9279311be996e01N.exe	83
PID 2760 wrote to memory of 4776	2760	2563e3d6d4c2a649c74dc12e6f361723e9ccb6ff5405928db9279311be996e01N.exe	87
PID 2760 wrote to memory of 4776	2760	2563e3d6d4c2a649c74dc12e6f361723e9ccb6ff5405928db9279311be996e01N.exe	87
PID 2760 wrote to memory of 4776	2760	2563e3d6d4c2a649c74dc12e6f361723e9ccb6ff5405928db9279311be996e01N.exe	87
PID 2760 wrote to memory of 4304	2760	2563e3d6d4c2a649c74dc12e6f361723e9ccb6ff5405928db9279311be996e01N.exe	90
PID 2760 wrote to memory of 4304	2760	2563e3d6d4c2a649c74dc12e6f361723e9ccb6ff5405928db9279311be996e01N.exe	90
PID 2760 wrote to memory of 4304	2760	2563e3d6d4c2a649c74dc12e6f361723e9ccb6ff5405928db9279311be996e01N.exe	90
PID 2760 wrote to memory of 4820	2760	2563e3d6d4c2a649c74dc12e6f361723e9ccb6ff5405928db9279311be996e01N.exe	92
PID 2760 wrote to memory of 4820	2760	2563e3d6d4c2a649c74dc12e6f361723e9ccb6ff5405928db9279311be996e01N.exe	92
PID 2760 wrote to memory of 4820	2760	2563e3d6d4c2a649c74dc12e6f361723e9ccb6ff5405928db9279311be996e01N.exe	92
PID 2760 wrote to memory of 1520	2760	2563e3d6d4c2a649c74dc12e6f361723e9ccb6ff5405928db9279311be996e01N.exe	95
PID 2760 wrote to memory of 1520	2760	2563e3d6d4c2a649c74dc12e6f361723e9ccb6ff5405928db9279311be996e01N.exe	95
PID 2760 wrote to memory of 1520	2760	2563e3d6d4c2a649c74dc12e6f361723e9ccb6ff5405928db9279311be996e01N.exe	95
PID 2760 wrote to memory of 1800	2760	2563e3d6d4c2a649c74dc12e6f361723e9ccb6ff5405928db9279311be996e01N.exe	99
PID 2760 wrote to memory of 1800	2760	2563e3d6d4c2a649c74dc12e6f361723e9ccb6ff5405928db9279311be996e01N.exe	99
PID 2760 wrote to memory of 1800	2760	2563e3d6d4c2a649c74dc12e6f361723e9ccb6ff5405928db9279311be996e01N.exe	99
PID 1980 wrote to memory of 3880	1980	gtfcvinx.exe	104
PID 1980 wrote to memory of 3880	1980	gtfcvinx.exe	104
PID 1980 wrote to memory of 3880	1980	gtfcvinx.exe	104
PID 1980 wrote to memory of 3880	1980	gtfcvinx.exe	104
PID 1980 wrote to memory of 3880	1980	gtfcvinx.exe	104

C:\Users\Admin\AppData\Local\Temp\2563e3d6d4c2a649c74dc12e6f361723e9ccb6ff5405928db9279311be996e01N.exe
"C:\Users\Admin\AppData\Local\Temp\2563e3d6d4c2a649c74dc12e6f361723e9ccb6ff5405928db9279311be996e01N.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2760
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\ybvgfoj\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:3076
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\gtfcvinx.exe" C:\Windows\SysWOW64\ybvgfoj\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4776
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create ybvgfoj binPath= "C:\Windows\SysWOW64\ybvgfoj\gtfcvinx.exe /d\"C:\Users\Admin\AppData\Local\Temp\2563e3d6d4c2a649c74dc12e6f361723e9ccb6ff5405928db9279311be996e01N.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4304
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description ybvgfoj "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4820
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start ybvgfoj
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:1520
- 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:1800
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2760 -s 660
  2⤵
  - Program crash
  PID:5100

C:\Windows\SysWOW64\ybvgfoj\gtfcvinx.exe
C:\Windows\SysWOW64\ybvgfoj\gtfcvinx.exe /d"C:\Users\Admin\AppData\Local\Temp\2563e3d6d4c2a649c74dc12e6f361723e9ccb6ff5405928db9279311be996e01N.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1980
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:3880
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1980 -s 512
  2⤵
  - Program crash
  PID:4696

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 452 -p 2760 -ip 2760
1⤵
PID:4104

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 420 -p 1980 -ip 1980
1⤵
PID:368

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\gtfcvinx.exe

Filesize
14.6MB

MD5
ebfac6af0b79f3e41e609833b74df916

SHA1
b24d516c402a7ad11d1bf750973d65dddf0dc55c

SHA256
c2fcac8fe84852b15e4edaa8492790ea5d1f26319c737be619f3a7f47508e82e

SHA512
8fff68c17681d93937a72b13eb1b3f505d9d145941b9264b55db666f9723e75270bb67fdf4e791975b190866b74fa86694ffedc47dd2c9c3fdfa484eb8f810d9

Download Submit
memory/1980-10-0x0000000000400000-0x0000000004C4C000-memory.dmp

Filesize
72.3MB

Download
memory/2760-1-0x0000000000400000-0x0000000004C4C000-memory.dmp

Filesize
72.3MB

Download
memory/2760-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2760-2-0x00000000001D0000-0x00000000001E3000-memory.dmp

Filesize
76KB

Download
memory/2760-4-0x0000000000400000-0x0000000004C4C000-memory.dmp

Filesize
72.3MB

Download
memory/2760-9-0x0000000000400000-0x0000000004C4C000-memory.dmp

Filesize
72.3MB

Download
memory/2760-11-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/3880-7-0x00000000004F0000-0x0000000000505000-memory.dmp

Filesize
84KB

Download
memory/3880-12-0x00000000004F0000-0x0000000000505000-memory.dmp

Filesize
84KB

Download
memory/3880-13-0x00000000004F0000-0x0000000000505000-memory.dmp

Filesize
84KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads