tofsee | 4d55358286fd76967fae14a6475c84db7ae260f4658900c333e73517aa342179

General

Target

4d55358286fd76967fae14a6475c84db7ae260f4658900c333e73517aa342179.exe
Size

14.9MB
MD5

ba9e3af2c7d730fa19561efec03a010b
SHA1

27b233843d99bb472e12080564613cf356e4a6a1
SHA256

4d55358286fd76967fae14a6475c84db7ae260f4658900c333e73517aa342179
SHA512

3c98f8d2a528f34a9aae207df7cc1dc893746baf417a7f28c822197c853fbbedc6dfcea149d50c0ebc6e754f985263eb3ec15f2134bce1e23b04d950c6a4363d
SSDEEP

196608:bpWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWk:d

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

Processes:

netsh.exe

pid process

1656 netsh.exe

pid	process
1656	netsh.exe

Sets service image path in registry 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

svchost.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\afffvahs\ImagePath = "C:\\Windows\\SysWOW64\\afffvahs\\pqoybuzk.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

Processes:

4d55358286fd76967fae14a6475c84db7ae260f4658900c333e73517aa342179.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2045521122-590294423-3465680274-1000\Control Panel\International\Geo\Nation	4d55358286fd76967fae14a6475c84db7ae260f4658900c333e73517aa342179.exe

Deletes itself 1 IoCs

Processes:

svchost.exe

pid process

2516 svchost.exe
Executes dropped EXE 1 IoCs

Processes:

pqoybuzk.exe

pid process

4644 pqoybuzk.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

pqoybuzk.exe

description pid process target process

PID 4644 set thread context of 2516 4644 pqoybuzk.exe svchost.exe
Launches sc.exe 3 IoCs
Sc.exe is a Windows utlilty to control services on the system.

Processes:

sc.exesc.exesc.exe

pid process

3644 sc.exe
664 sc.exe
3992 sc.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
2516	svchost.exe

pid	process
4644	pqoybuzk.exe

description	pid	process	target process
PID 4644 set thread context of 2516	4644	pqoybuzk.exe	svchost.exe

pid	process
3644	sc.exe
664	sc.exe
3992	sc.exe

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

Processes:

netsh.exe

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

Processes:

WerFault.exeWerFault.exe

pid	pid_target	process	target process
796	4524	WerFault.exe	4d55358286fd76967fae14a6475c84db7ae260f4658900c333e73517aa342179.exe
2344	4644	WerFault.exe	pqoybuzk.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

Processes:

cmd.exepqoybuzk.exesvchost.exenetsh.exe4d55358286fd76967fae14a6475c84db7ae260f4658900c333e73517aa342179.execmd.exesc.exesc.exesc.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	pqoybuzk.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	netsh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	4d55358286fd76967fae14a6475c84db7ae260f4658900c333e73517aa342179.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

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

4d55358286fd76967fae14a6475c84db7ae260f4658900c333e73517aa342179.exepqoybuzk.exe

description	pid	process	target process
PID 4524 wrote to memory of 1584	4524	4d55358286fd76967fae14a6475c84db7ae260f4658900c333e73517aa342179.exe	cmd.exe
PID 4524 wrote to memory of 1584	4524	4d55358286fd76967fae14a6475c84db7ae260f4658900c333e73517aa342179.exe	cmd.exe
PID 4524 wrote to memory of 1584	4524	4d55358286fd76967fae14a6475c84db7ae260f4658900c333e73517aa342179.exe	cmd.exe
PID 4524 wrote to memory of 2424	4524	4d55358286fd76967fae14a6475c84db7ae260f4658900c333e73517aa342179.exe	cmd.exe
PID 4524 wrote to memory of 2424	4524	4d55358286fd76967fae14a6475c84db7ae260f4658900c333e73517aa342179.exe	cmd.exe
PID 4524 wrote to memory of 2424	4524	4d55358286fd76967fae14a6475c84db7ae260f4658900c333e73517aa342179.exe	cmd.exe
PID 4524 wrote to memory of 3644	4524	4d55358286fd76967fae14a6475c84db7ae260f4658900c333e73517aa342179.exe	sc.exe
PID 4524 wrote to memory of 3644	4524	4d55358286fd76967fae14a6475c84db7ae260f4658900c333e73517aa342179.exe	sc.exe
PID 4524 wrote to memory of 3644	4524	4d55358286fd76967fae14a6475c84db7ae260f4658900c333e73517aa342179.exe	sc.exe
PID 4524 wrote to memory of 664	4524	4d55358286fd76967fae14a6475c84db7ae260f4658900c333e73517aa342179.exe	sc.exe
PID 4524 wrote to memory of 664	4524	4d55358286fd76967fae14a6475c84db7ae260f4658900c333e73517aa342179.exe	sc.exe
PID 4524 wrote to memory of 664	4524	4d55358286fd76967fae14a6475c84db7ae260f4658900c333e73517aa342179.exe	sc.exe
PID 4524 wrote to memory of 3992	4524	4d55358286fd76967fae14a6475c84db7ae260f4658900c333e73517aa342179.exe	sc.exe
PID 4524 wrote to memory of 3992	4524	4d55358286fd76967fae14a6475c84db7ae260f4658900c333e73517aa342179.exe	sc.exe
PID 4524 wrote to memory of 3992	4524	4d55358286fd76967fae14a6475c84db7ae260f4658900c333e73517aa342179.exe	sc.exe
PID 4524 wrote to memory of 1656	4524	4d55358286fd76967fae14a6475c84db7ae260f4658900c333e73517aa342179.exe	netsh.exe
PID 4524 wrote to memory of 1656	4524	4d55358286fd76967fae14a6475c84db7ae260f4658900c333e73517aa342179.exe	netsh.exe
PID 4524 wrote to memory of 1656	4524	4d55358286fd76967fae14a6475c84db7ae260f4658900c333e73517aa342179.exe	netsh.exe
PID 4644 wrote to memory of 2516	4644	pqoybuzk.exe	svchost.exe
PID 4644 wrote to memory of 2516	4644	pqoybuzk.exe	svchost.exe
PID 4644 wrote to memory of 2516	4644	pqoybuzk.exe	svchost.exe
PID 4644 wrote to memory of 2516	4644	pqoybuzk.exe	svchost.exe
PID 4644 wrote to memory of 2516	4644	pqoybuzk.exe	svchost.exe

C:\Users\Admin\AppData\Local\Temp\4d55358286fd76967fae14a6475c84db7ae260f4658900c333e73517aa342179.exe
"C:\Users\Admin\AppData\Local\Temp\4d55358286fd76967fae14a6475c84db7ae260f4658900c333e73517aa342179.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4524
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\afffvahs\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:1584
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\pqoybuzk.exe" C:\Windows\SysWOW64\afffvahs\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2424
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create afffvahs binPath= "C:\Windows\SysWOW64\afffvahs\pqoybuzk.exe /d\"C:\Users\Admin\AppData\Local\Temp\4d55358286fd76967fae14a6475c84db7ae260f4658900c333e73517aa342179.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3644
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description afffvahs "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:664
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start afffvahs
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3992
- 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:1656
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4524 -s 780
  2⤵
  - Program crash
  PID:796

C:\Windows\SysWOW64\afffvahs\pqoybuzk.exe
C:\Windows\SysWOW64\afffvahs\pqoybuzk.exe /d"C:\Users\Admin\AppData\Local\Temp\4d55358286fd76967fae14a6475c84db7ae260f4658900c333e73517aa342179.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4644
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:2516
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4644 -s 524
  2⤵
  - Program crash
  PID:2344

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 456 -p 4524 -ip 4524
1⤵
PID:1380

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 532 -p 4644 -ip 4644
1⤵
PID:2528

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\pqoybuzk.exe

Filesize
13.0MB

MD5
5b0c23508d94866b65681b352d5cf4e5

SHA1
0b4d104a7f1b50217fabcf6f1fec171d31ae841f

SHA256
bca9ff43bb9e281d1d8a4b74c8f786277d4db2c7ac3611f747b86031eb9851a1

SHA512
0f61764694f81f55925304124af7d4c76e154d22988060b61e89c828086d6ec8204269251311cbdd47a1782275f56feb7630cc61365ee122aa6edd8d987f282f

Download Submit
memory/2516-11-0x0000000001250000-0x0000000001265000-memory.dmp

Filesize
84KB

Download
memory/2516-13-0x0000000001250000-0x0000000001265000-memory.dmp

Filesize
84KB

Download
memory/2516-14-0x0000000001250000-0x0000000001265000-memory.dmp

Filesize
84KB

Download
memory/4524-1-0x0000000003190000-0x0000000003290000-memory.dmp

Filesize
1024KB

Download
memory/4524-2-0x00000000030A0000-0x00000000030B3000-memory.dmp

Filesize
76KB

Download
memory/4524-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/4524-10-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/4524-9-0x00000000030A0000-0x00000000030B3000-memory.dmp

Filesize
76KB

Download
memory/4524-8-0x0000000000400000-0x0000000002F0D000-memory.dmp

Filesize
43.1MB

Download
memory/4644-15-0x0000000000400000-0x0000000002F0D000-memory.dmp

Filesize
43.1MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads