tofsee | 81de39e7c4edad66037f5b8e4965542d7aa4b2318459735f6ec490a1637fda0b

General

Target

81de39e7c4edad66037f5b8e4965542d7aa4b2318459735f6ec490a1637fda0b.exe
Size

13.7MB
MD5

5f46e1a9a454e6f44e49c0c81ee26a79
SHA1

7cb18cae342b9e49b6aa12af1ab1d6d953f6f315
SHA256

81de39e7c4edad66037f5b8e4965542d7aa4b2318459735f6ec490a1637fda0b
SHA512

f4777321413ad062eba356fb73c2ffc1e01121e2c8d0bd5a7a3d2f2dc6fd36b7405e19d65275fe637e7a0dc8568e7196e26f19ae4913377400ef9c132b5dbae6
SSDEEP

49152:H77777777777777777777777777777777777777777777777777777777777777U:E

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
5012	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\lqxjxgry\ImagePath = "C:\\Windows\\SysWOW64\\lqxjxgry\\ewovulwd.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	81de39e7c4edad66037f5b8e4965542d7aa4b2318459735f6ec490a1637fda0b.exe

Deletes itself 1 IoCs

pid	Process
2884	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
4324	ewovulwd.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4324 set thread context of 2884	4324	ewovulwd.exe	105

Launches sc.exe 3 IoCs

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

pid	Process
1772	sc.exe
2492	sc.exe
2796	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
856	3180	WerFault.exe	82
3536	4324	WerFault.exe	96

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	ewovulwd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.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	netsh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	81de39e7c4edad66037f5b8e4965542d7aa4b2318459735f6ec490a1637fda0b.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 3180 wrote to memory of 1920	3180	81de39e7c4edad66037f5b8e4965542d7aa4b2318459735f6ec490a1637fda0b.exe	83
PID 3180 wrote to memory of 1920	3180	81de39e7c4edad66037f5b8e4965542d7aa4b2318459735f6ec490a1637fda0b.exe	83
PID 3180 wrote to memory of 1920	3180	81de39e7c4edad66037f5b8e4965542d7aa4b2318459735f6ec490a1637fda0b.exe	83
PID 3180 wrote to memory of 2316	3180	81de39e7c4edad66037f5b8e4965542d7aa4b2318459735f6ec490a1637fda0b.exe	85
PID 3180 wrote to memory of 2316	3180	81de39e7c4edad66037f5b8e4965542d7aa4b2318459735f6ec490a1637fda0b.exe	85
PID 3180 wrote to memory of 2316	3180	81de39e7c4edad66037f5b8e4965542d7aa4b2318459735f6ec490a1637fda0b.exe	85
PID 3180 wrote to memory of 1772	3180	81de39e7c4edad66037f5b8e4965542d7aa4b2318459735f6ec490a1637fda0b.exe	88
PID 3180 wrote to memory of 1772	3180	81de39e7c4edad66037f5b8e4965542d7aa4b2318459735f6ec490a1637fda0b.exe	88
PID 3180 wrote to memory of 1772	3180	81de39e7c4edad66037f5b8e4965542d7aa4b2318459735f6ec490a1637fda0b.exe	88
PID 3180 wrote to memory of 2492	3180	81de39e7c4edad66037f5b8e4965542d7aa4b2318459735f6ec490a1637fda0b.exe	92
PID 3180 wrote to memory of 2492	3180	81de39e7c4edad66037f5b8e4965542d7aa4b2318459735f6ec490a1637fda0b.exe	92
PID 3180 wrote to memory of 2492	3180	81de39e7c4edad66037f5b8e4965542d7aa4b2318459735f6ec490a1637fda0b.exe	92
PID 3180 wrote to memory of 2796	3180	81de39e7c4edad66037f5b8e4965542d7aa4b2318459735f6ec490a1637fda0b.exe	94
PID 3180 wrote to memory of 2796	3180	81de39e7c4edad66037f5b8e4965542d7aa4b2318459735f6ec490a1637fda0b.exe	94
PID 3180 wrote to memory of 2796	3180	81de39e7c4edad66037f5b8e4965542d7aa4b2318459735f6ec490a1637fda0b.exe	94
PID 3180 wrote to memory of 5012	3180	81de39e7c4edad66037f5b8e4965542d7aa4b2318459735f6ec490a1637fda0b.exe	98
PID 3180 wrote to memory of 5012	3180	81de39e7c4edad66037f5b8e4965542d7aa4b2318459735f6ec490a1637fda0b.exe	98
PID 3180 wrote to memory of 5012	3180	81de39e7c4edad66037f5b8e4965542d7aa4b2318459735f6ec490a1637fda0b.exe	98
PID 4324 wrote to memory of 2884	4324	ewovulwd.exe	105
PID 4324 wrote to memory of 2884	4324	ewovulwd.exe	105
PID 4324 wrote to memory of 2884	4324	ewovulwd.exe	105
PID 4324 wrote to memory of 2884	4324	ewovulwd.exe	105
PID 4324 wrote to memory of 2884	4324	ewovulwd.exe	105

C:\Users\Admin\AppData\Local\Temp\81de39e7c4edad66037f5b8e4965542d7aa4b2318459735f6ec490a1637fda0b.exe
"C:\Users\Admin\AppData\Local\Temp\81de39e7c4edad66037f5b8e4965542d7aa4b2318459735f6ec490a1637fda0b.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3180
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\lqxjxgry\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:1920
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\ewovulwd.exe" C:\Windows\SysWOW64\lqxjxgry\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2316
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create lqxjxgry binPath= "C:\Windows\SysWOW64\lqxjxgry\ewovulwd.exe /d\"C:\Users\Admin\AppData\Local\Temp\81de39e7c4edad66037f5b8e4965542d7aa4b2318459735f6ec490a1637fda0b.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:1772
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description lqxjxgry "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2492
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start lqxjxgry
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2796
- 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:5012
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3180 -s 1216
  2⤵
  - Program crash
  PID:856

C:\Windows\SysWOW64\lqxjxgry\ewovulwd.exe
C:\Windows\SysWOW64\lqxjxgry\ewovulwd.exe /d"C:\Users\Admin\AppData\Local\Temp\81de39e7c4edad66037f5b8e4965542d7aa4b2318459735f6ec490a1637fda0b.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4324
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:2884
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4324 -s 536
  2⤵
  - Program crash
  PID:3536

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 3180 -ip 3180
1⤵
PID:2304

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 556 -p 4324 -ip 4324
1⤵
PID:5116

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\ewovulwd.exe

Filesize
13.1MB

MD5
d74ec50b45194a8d5194fcc1eb1dd40d

SHA1
311fa48dc7da2d8f465684887b302a5b21443a7e

SHA256
f8c4479c40d78d268a693fab55ab06d44e458fa356ada4989fae514e664d70ed

SHA512
7fd725174cf3035ab4ac8843b3e48646d2f89ed7880691f279fde5c8ffac9e4ab19edb72c084c74af2e2bf83f556233cc0df80b92ddd0b75823af90098a9aa22

Download Submit
memory/2884-11-0x00000000004F0000-0x0000000000505000-memory.dmp

Filesize
84KB

Download
memory/2884-13-0x00000000004F0000-0x0000000000505000-memory.dmp

Filesize
84KB

Download
memory/2884-15-0x00000000004F0000-0x0000000000505000-memory.dmp

Filesize
84KB

Download
memory/3180-1-0x0000000001750000-0x0000000001850000-memory.dmp

Filesize
1024KB

Download
memory/3180-2-0x00000000032C0000-0x00000000032D3000-memory.dmp

Filesize
76KB

Download
memory/3180-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/3180-10-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/3180-9-0x00000000032C0000-0x00000000032D3000-memory.dmp

Filesize
76KB

Download
memory/3180-8-0x0000000000400000-0x00000000016BC000-memory.dmp

Filesize
18.7MB

Download
memory/4324-14-0x0000000000400000-0x00000000016BC000-memory.dmp

Filesize
18.7MB

Download
memory/4324-16-0x0000000000400000-0x00000000016BC000-memory.dmp

Filesize
18.7MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads