tofsee | c69e4ce48dbf378920c3a0cc37ebf881307640e541e5b9d502e67ecd14ebf7fc

General

Target

c69e4ce48dbf378920c3a0cc37ebf881307640e541e5b9d502e67ecd14ebf7fc.exe
Size

11.0MB
MD5

ef3c5015763ab19adfb70ad34cc3aab4
SHA1

78b17d4ecf64b54f8a60bdf831204ceea591e11d
SHA256

c69e4ce48dbf378920c3a0cc37ebf881307640e541e5b9d502e67ecd14ebf7fc
SHA512

eb2989667b3f052805e34022b978d258a740c83985854b5af884288bb36f8cf24564d0164153f778f92877a16c1303d3c360e70dc8128679a0b0dd0ad35e0236
SSDEEP

3072:qrLSAaIXFM9X/WWIyOEfEDQMZWecFKmZv:sNWktyH9VR

Score

10^/10

tofsee discovery evasion execution persistence privilege_escalation trojan

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

evasion

Windows Service

T1543.003

Disable or Modify System Firewall

T1562.004

pid	Process
2160	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\rysqnauf\ImagePath = "C:\\Windows\\SysWOW64\\rysqnauf\\vewvequl.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	c69e4ce48dbf378920c3a0cc37ebf881307640e541e5b9d502e67ecd14ebf7fc.exe

Deletes itself 1 IoCs

pid	Process
3228	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
3556	vewvequl.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3556 set thread context of 3228	3556	vewvequl.exe	96

Launches sc.exe 3 IoCs

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

pid	Process
2308	sc.exe
8	sc.exe
3588	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

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	netsh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	c69e4ce48dbf378920c3a0cc37ebf881307640e541e5b9d502e67ecd14ebf7fc.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	vewvequl.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 3152 wrote to memory of 4576	3152	c69e4ce48dbf378920c3a0cc37ebf881307640e541e5b9d502e67ecd14ebf7fc.exe	82
PID 3152 wrote to memory of 4576	3152	c69e4ce48dbf378920c3a0cc37ebf881307640e541e5b9d502e67ecd14ebf7fc.exe	82
PID 3152 wrote to memory of 4576	3152	c69e4ce48dbf378920c3a0cc37ebf881307640e541e5b9d502e67ecd14ebf7fc.exe	82
PID 3152 wrote to memory of 4008	3152	c69e4ce48dbf378920c3a0cc37ebf881307640e541e5b9d502e67ecd14ebf7fc.exe	84
PID 3152 wrote to memory of 4008	3152	c69e4ce48dbf378920c3a0cc37ebf881307640e541e5b9d502e67ecd14ebf7fc.exe	84
PID 3152 wrote to memory of 4008	3152	c69e4ce48dbf378920c3a0cc37ebf881307640e541e5b9d502e67ecd14ebf7fc.exe	84
PID 3152 wrote to memory of 2308	3152	c69e4ce48dbf378920c3a0cc37ebf881307640e541e5b9d502e67ecd14ebf7fc.exe	86
PID 3152 wrote to memory of 2308	3152	c69e4ce48dbf378920c3a0cc37ebf881307640e541e5b9d502e67ecd14ebf7fc.exe	86
PID 3152 wrote to memory of 2308	3152	c69e4ce48dbf378920c3a0cc37ebf881307640e541e5b9d502e67ecd14ebf7fc.exe	86
PID 3152 wrote to memory of 8	3152	c69e4ce48dbf378920c3a0cc37ebf881307640e541e5b9d502e67ecd14ebf7fc.exe	88
PID 3152 wrote to memory of 8	3152	c69e4ce48dbf378920c3a0cc37ebf881307640e541e5b9d502e67ecd14ebf7fc.exe	88
PID 3152 wrote to memory of 8	3152	c69e4ce48dbf378920c3a0cc37ebf881307640e541e5b9d502e67ecd14ebf7fc.exe	88
PID 3152 wrote to memory of 3588	3152	c69e4ce48dbf378920c3a0cc37ebf881307640e541e5b9d502e67ecd14ebf7fc.exe	91
PID 3152 wrote to memory of 3588	3152	c69e4ce48dbf378920c3a0cc37ebf881307640e541e5b9d502e67ecd14ebf7fc.exe	91
PID 3152 wrote to memory of 3588	3152	c69e4ce48dbf378920c3a0cc37ebf881307640e541e5b9d502e67ecd14ebf7fc.exe	91
PID 3556 wrote to memory of 3228	3556	vewvequl.exe	96
PID 3556 wrote to memory of 3228	3556	vewvequl.exe	96
PID 3556 wrote to memory of 3228	3556	vewvequl.exe	96
PID 3556 wrote to memory of 3228	3556	vewvequl.exe	96
PID 3556 wrote to memory of 3228	3556	vewvequl.exe	96
PID 3152 wrote to memory of 2160	3152	c69e4ce48dbf378920c3a0cc37ebf881307640e541e5b9d502e67ecd14ebf7fc.exe	97
PID 3152 wrote to memory of 2160	3152	c69e4ce48dbf378920c3a0cc37ebf881307640e541e5b9d502e67ecd14ebf7fc.exe	97
PID 3152 wrote to memory of 2160	3152	c69e4ce48dbf378920c3a0cc37ebf881307640e541e5b9d502e67ecd14ebf7fc.exe	97

C:\Users\Admin\AppData\Local\Temp\c69e4ce48dbf378920c3a0cc37ebf881307640e541e5b9d502e67ecd14ebf7fc.exe
"C:\Users\Admin\AppData\Local\Temp\c69e4ce48dbf378920c3a0cc37ebf881307640e541e5b9d502e67ecd14ebf7fc.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3152
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\rysqnauf\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4576
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\vewvequl.exe" C:\Windows\SysWOW64\rysqnauf\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4008
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create rysqnauf binPath= "C:\Windows\SysWOW64\rysqnauf\vewvequl.exe /d\"C:\Users\Admin\AppData\Local\Temp\c69e4ce48dbf378920c3a0cc37ebf881307640e541e5b9d502e67ecd14ebf7fc.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2308
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description rysqnauf "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:8
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start rysqnauf
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3588
- 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:2160

C:\Windows\SysWOW64\rysqnauf\vewvequl.exe
C:\Windows\SysWOW64\rysqnauf\vewvequl.exe /d"C:\Users\Admin\AppData\Local\Temp\c69e4ce48dbf378920c3a0cc37ebf881307640e541e5b9d502e67ecd14ebf7fc.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3556
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:3228

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\vewvequl.exe

Filesize
13.2MB

MD5
edd3d4dfe840c54d879fd9ddc42c0241

SHA1
007e92329f8686b44a9b5d3ed2d543e1359e578c

SHA256
362baebf06adec81941740f160567f9600a59cd76344c1f7cad42fc580326065

SHA512
7bf9a252ce61a395ddc7b3e7f6c1bc9d0f3ac20345aa33ae1f2bf33a5aa66ae83ecd2d0a4ff68b8042fd4300003b8e8b1f04f1d96e9f4ea7d90ae6577e68e154

Download Submit
memory/3152-14-0x0000000000400000-0x000000000041B000-memory.dmp

Filesize
108KB

Download
memory/3152-2-0x0000000000400000-0x000000000041B000-memory.dmp

Filesize
108KB

Download
memory/3152-1-0x00000000005C0000-0x00000000005C1000-memory.dmp

Filesize
4KB

Download
memory/3152-0-0x00000000022D0000-0x00000000022D1000-memory.dmp

Filesize
4KB

Download
memory/3228-8-0x0000000000990000-0x00000000009A5000-memory.dmp

Filesize
84KB

Download
memory/3228-13-0x0000000000990000-0x00000000009A5000-memory.dmp

Filesize
84KB

Download
memory/3228-16-0x0000000000990000-0x00000000009A5000-memory.dmp

Filesize
84KB

Download
memory/3228-17-0x0000000000990000-0x00000000009A5000-memory.dmp

Filesize
84KB

Download
memory/3228-18-0x0000000000990000-0x00000000009A5000-memory.dmp

Filesize
84KB

Download
memory/3556-7-0x0000000000DC0000-0x0000000000DC1000-memory.dmp

Filesize
4KB

Download
memory/3556-12-0x000000005F000000-0x000000005F011000-memory.dmp

Filesize
68KB

Download
memory/3556-11-0x0000000000400000-0x000000000041B000-memory.dmp

Filesize
108KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads