tofsee | d6d6581e266a3f1d371dd4ddff0240e50b9aeee252373b15caad66eecacb873b

General

Target

e1e65f9c773cc00d08dda0f9971fbb971c033d32382bdd1a59194adcde2c3e7e.exe
Size

337KB
MD5

64765141b86d4bce1470e9b8b9de492d
SHA1

8497035ee193ff0351f8ca6a5b924bf6db8f706d
SHA256

e1e65f9c773cc00d08dda0f9971fbb971c033d32382bdd1a59194adcde2c3e7e
SHA512

f8404a22092a659585eafa2f5504e630abe0302713e3ad13848f4809d92c39f284d85eb4db6c9cf9dc660ebe22b397e97b116cc196d698ab2ccdf1836b48507a
SSDEEP

6144:xiu5EIbeIz5anwf7Beqh4QUslWmsos3xub+gQXcIjzqw:xuozSwf7Q2/UslWmkxK+gQXZl

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

pid	Process
2668	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\anvykcyt\ImagePath = "C:\\Windows\\SysWOW64\\anvykcyt\\litywgda.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-1-5-21-3442511616-637977696-3186306149-1000\Control Panel\International\Geo\Nation	e1e65f9c773cc00d08dda0f9971fbb971c033d32382bdd1a59194adcde2c3e7e.exe

Deletes itself 1 IoCs

pid	Process
3808	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
1312	litywgda.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1312 set thread context of 3808	1312	litywgda.exe	98

Launches sc.exe 3 IoCs

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

pid	Process
1404	sc.exe
3616	sc.exe
2808	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
988	2208	WerFault.exe	81
668	1312	WerFault.exe	92

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	e1e65f9c773cc00d08dda0f9971fbb971c033d32382bdd1a59194adcde2c3e7e.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	litywgda.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 2208 wrote to memory of 4400	2208	e1e65f9c773cc00d08dda0f9971fbb971c033d32382bdd1a59194adcde2c3e7e.exe	82
PID 2208 wrote to memory of 4400	2208	e1e65f9c773cc00d08dda0f9971fbb971c033d32382bdd1a59194adcde2c3e7e.exe	82
PID 2208 wrote to memory of 4400	2208	e1e65f9c773cc00d08dda0f9971fbb971c033d32382bdd1a59194adcde2c3e7e.exe	82
PID 2208 wrote to memory of 3844	2208	e1e65f9c773cc00d08dda0f9971fbb971c033d32382bdd1a59194adcde2c3e7e.exe	84
PID 2208 wrote to memory of 3844	2208	e1e65f9c773cc00d08dda0f9971fbb971c033d32382bdd1a59194adcde2c3e7e.exe	84
PID 2208 wrote to memory of 3844	2208	e1e65f9c773cc00d08dda0f9971fbb971c033d32382bdd1a59194adcde2c3e7e.exe	84
PID 2208 wrote to memory of 2808	2208	e1e65f9c773cc00d08dda0f9971fbb971c033d32382bdd1a59194adcde2c3e7e.exe	86
PID 2208 wrote to memory of 2808	2208	e1e65f9c773cc00d08dda0f9971fbb971c033d32382bdd1a59194adcde2c3e7e.exe	86
PID 2208 wrote to memory of 2808	2208	e1e65f9c773cc00d08dda0f9971fbb971c033d32382bdd1a59194adcde2c3e7e.exe	86
PID 2208 wrote to memory of 1404	2208	e1e65f9c773cc00d08dda0f9971fbb971c033d32382bdd1a59194adcde2c3e7e.exe	88
PID 2208 wrote to memory of 1404	2208	e1e65f9c773cc00d08dda0f9971fbb971c033d32382bdd1a59194adcde2c3e7e.exe	88
PID 2208 wrote to memory of 1404	2208	e1e65f9c773cc00d08dda0f9971fbb971c033d32382bdd1a59194adcde2c3e7e.exe	88
PID 2208 wrote to memory of 3616	2208	e1e65f9c773cc00d08dda0f9971fbb971c033d32382bdd1a59194adcde2c3e7e.exe	90
PID 2208 wrote to memory of 3616	2208	e1e65f9c773cc00d08dda0f9971fbb971c033d32382bdd1a59194adcde2c3e7e.exe	90
PID 2208 wrote to memory of 3616	2208	e1e65f9c773cc00d08dda0f9971fbb971c033d32382bdd1a59194adcde2c3e7e.exe	90
PID 2208 wrote to memory of 2668	2208	e1e65f9c773cc00d08dda0f9971fbb971c033d32382bdd1a59194adcde2c3e7e.exe	93
PID 2208 wrote to memory of 2668	2208	e1e65f9c773cc00d08dda0f9971fbb971c033d32382bdd1a59194adcde2c3e7e.exe	93
PID 2208 wrote to memory of 2668	2208	e1e65f9c773cc00d08dda0f9971fbb971c033d32382bdd1a59194adcde2c3e7e.exe	93
PID 1312 wrote to memory of 3808	1312	litywgda.exe	98
PID 1312 wrote to memory of 3808	1312	litywgda.exe	98
PID 1312 wrote to memory of 3808	1312	litywgda.exe	98
PID 1312 wrote to memory of 3808	1312	litywgda.exe	98
PID 1312 wrote to memory of 3808	1312	litywgda.exe	98

C:\Users\Admin\AppData\Local\Temp\e1e65f9c773cc00d08dda0f9971fbb971c033d32382bdd1a59194adcde2c3e7e.exe
"C:\Users\Admin\AppData\Local\Temp\e1e65f9c773cc00d08dda0f9971fbb971c033d32382bdd1a59194adcde2c3e7e.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2208
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\anvykcyt\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4400
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\litywgda.exe" C:\Windows\SysWOW64\anvykcyt\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:3844
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create anvykcyt binPath= "C:\Windows\SysWOW64\anvykcyt\litywgda.exe /d\"C:\Users\Admin\AppData\Local\Temp\e1e65f9c773cc00d08dda0f9971fbb971c033d32382bdd1a59194adcde2c3e7e.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2808
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description anvykcyt "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:1404
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start anvykcyt
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3616
- 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:2668
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2208 -s 640
  2⤵
  - Program crash
  PID:988

C:\Windows\SysWOW64\anvykcyt\litywgda.exe
C:\Windows\SysWOW64\anvykcyt\litywgda.exe /d"C:\Users\Admin\AppData\Local\Temp\e1e65f9c773cc00d08dda0f9971fbb971c033d32382bdd1a59194adcde2c3e7e.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1312
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:3808
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1312 -s 512
  2⤵
  - Program crash
  PID:668

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 2208 -ip 2208
1⤵
PID:3008

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 524 -p 1312 -ip 1312
1⤵
PID:3684

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\litywgda.exe

Filesize
10.2MB

MD5
27ee1acb14b3760c5cf58d9daebfc983

SHA1
6f05eb0ee020c454ea64b20a67f6f1d50b47b12e

SHA256
ba7e68184d897376a363bb75e008f4572d4d18e6b4fa89c92a1a6530e829ffc7

SHA512
0fee0ac4b8c71367dc70c2a8e083d94e0e22291f8b4db0310611ca8a9aa6138f62b082cf8eea2745cf22aa9653c30dc7a5910cf311fd2de4b7e542c9c09b3584

Download Submit
memory/1312-15-0x0000000000400000-0x0000000002B4E000-memory.dmp

Filesize
39.3MB

Download
memory/2208-1-0x0000000002C80000-0x0000000002D80000-memory.dmp

Filesize
1024KB

Download
memory/2208-2-0x00000000001C0000-0x00000000001D3000-memory.dmp

Filesize
76KB

Download
memory/2208-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2208-9-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2208-8-0x00000000001C0000-0x00000000001D3000-memory.dmp

Filesize
76KB

Download
memory/2208-7-0x0000000000400000-0x0000000002B4E000-memory.dmp

Filesize
39.3MB

Download
memory/3808-11-0x0000000000A70000-0x0000000000A85000-memory.dmp

Filesize
84KB

Download
memory/3808-13-0x0000000000A70000-0x0000000000A85000-memory.dmp

Filesize
84KB

Download
memory/3808-14-0x0000000000A70000-0x0000000000A85000-memory.dmp

Filesize
84KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads