tofsee | 41dbb0db0f852fa822dfc024d3effdf27bafa549372f27244902f5fdefa25fd6

General

Target

41dbb0db0f852fa822dfc024d3effdf27bafa549372f27244902f5fdefa25fd6N.exe
Size

291KB
MD5

e9872731faa5e1fa5ef63e9a07fc0720
SHA1

6dcd38a92ef3920c1fcf85881b92deb2d9c1790a
SHA256

41dbb0db0f852fa822dfc024d3effdf27bafa549372f27244902f5fdefa25fd6
SHA512

0b0788ce65fb26fac72055c099bdd93fa313f0dcef51f82b4e4f4ea7b5cb5a4c7f06e997475da93ece16f1009804c6e13c06f33c9f18c06f3ee0918ba72aa809
SSDEEP

6144:HbDiEbQtM055szCZb55JgXrSXuZet0yob7PANco+hOg:UM450a55G7SXuZet0yob7Ro+F

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
4532	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\ftumdtea\ImagePath = "C:\\Windows\\SysWOW64\\ftumdtea\\zvkkpwct.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:

41dbb0db0f852fa822dfc024d3effdf27bafa549372f27244902f5fdefa25fd6N.exe

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-3350944739-639801879-157714471-1000\Control Panel\International\Geo\Nation	41dbb0db0f852fa822dfc024d3effdf27bafa549372f27244902f5fdefa25fd6N.exe

Deletes itself 1 IoCs

Processes:

svchost.exe

pid	Process
3696	svchost.exe

Executes dropped EXE 1 IoCs

Processes:

zvkkpwct.exe

pid	Process
2164	zvkkpwct.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

zvkkpwct.exe

description	pid	Process	procid_target
PID 2164 set thread context of 3696	2164	zvkkpwct.exe	109

Launches sc.exe 3 IoCs

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

Processes:

sc.exesc.exesc.exe

pid	Process
1964	sc.exe
4500	sc.exe
4660	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

Processes:

netsh.exe

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

Processes:

WerFault.exeWerFault.exe

pid	pid_target	Process	procid_target
4644	4400	WerFault.exe	82
1908	2164	WerFault.exe	100

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:

41dbb0db0f852fa822dfc024d3effdf27bafa549372f27244902f5fdefa25fd6N.execmd.exesc.exezvkkpwct.exesvchost.execmd.exesc.exesc.exenetsh.exe

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	41dbb0db0f852fa822dfc024d3effdf27bafa549372f27244902f5fdefa25fd6N.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	zvkkpwct.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.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

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

41dbb0db0f852fa822dfc024d3effdf27bafa549372f27244902f5fdefa25fd6N.exezvkkpwct.exe

description	pid	Process	procid_target
PID 4400 wrote to memory of 4776	4400	41dbb0db0f852fa822dfc024d3effdf27bafa549372f27244902f5fdefa25fd6N.exe	83
PID 4400 wrote to memory of 4776	4400	41dbb0db0f852fa822dfc024d3effdf27bafa549372f27244902f5fdefa25fd6N.exe	83
PID 4400 wrote to memory of 4776	4400	41dbb0db0f852fa822dfc024d3effdf27bafa549372f27244902f5fdefa25fd6N.exe	83
PID 4400 wrote to memory of 400	4400	41dbb0db0f852fa822dfc024d3effdf27bafa549372f27244902f5fdefa25fd6N.exe	87
PID 4400 wrote to memory of 400	4400	41dbb0db0f852fa822dfc024d3effdf27bafa549372f27244902f5fdefa25fd6N.exe	87
PID 4400 wrote to memory of 400	4400	41dbb0db0f852fa822dfc024d3effdf27bafa549372f27244902f5fdefa25fd6N.exe	87
PID 4400 wrote to memory of 1964	4400	41dbb0db0f852fa822dfc024d3effdf27bafa549372f27244902f5fdefa25fd6N.exe	89
PID 4400 wrote to memory of 1964	4400	41dbb0db0f852fa822dfc024d3effdf27bafa549372f27244902f5fdefa25fd6N.exe	89
PID 4400 wrote to memory of 1964	4400	41dbb0db0f852fa822dfc024d3effdf27bafa549372f27244902f5fdefa25fd6N.exe	89
PID 4400 wrote to memory of 4500	4400	41dbb0db0f852fa822dfc024d3effdf27bafa549372f27244902f5fdefa25fd6N.exe	96
PID 4400 wrote to memory of 4500	4400	41dbb0db0f852fa822dfc024d3effdf27bafa549372f27244902f5fdefa25fd6N.exe	96
PID 4400 wrote to memory of 4500	4400	41dbb0db0f852fa822dfc024d3effdf27bafa549372f27244902f5fdefa25fd6N.exe	96
PID 4400 wrote to memory of 4660	4400	41dbb0db0f852fa822dfc024d3effdf27bafa549372f27244902f5fdefa25fd6N.exe	98
PID 4400 wrote to memory of 4660	4400	41dbb0db0f852fa822dfc024d3effdf27bafa549372f27244902f5fdefa25fd6N.exe	98
PID 4400 wrote to memory of 4660	4400	41dbb0db0f852fa822dfc024d3effdf27bafa549372f27244902f5fdefa25fd6N.exe	98
PID 4400 wrote to memory of 4532	4400	41dbb0db0f852fa822dfc024d3effdf27bafa549372f27244902f5fdefa25fd6N.exe	101
PID 4400 wrote to memory of 4532	4400	41dbb0db0f852fa822dfc024d3effdf27bafa549372f27244902f5fdefa25fd6N.exe	101
PID 4400 wrote to memory of 4532	4400	41dbb0db0f852fa822dfc024d3effdf27bafa549372f27244902f5fdefa25fd6N.exe	101
PID 2164 wrote to memory of 3696	2164	zvkkpwct.exe	109
PID 2164 wrote to memory of 3696	2164	zvkkpwct.exe	109
PID 2164 wrote to memory of 3696	2164	zvkkpwct.exe	109
PID 2164 wrote to memory of 3696	2164	zvkkpwct.exe	109
PID 2164 wrote to memory of 3696	2164	zvkkpwct.exe	109

C:\Users\Admin\AppData\Local\Temp\41dbb0db0f852fa822dfc024d3effdf27bafa549372f27244902f5fdefa25fd6N.exe
"C:\Users\Admin\AppData\Local\Temp\41dbb0db0f852fa822dfc024d3effdf27bafa549372f27244902f5fdefa25fd6N.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4400
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\ftumdtea\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4776
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\zvkkpwct.exe" C:\Windows\SysWOW64\ftumdtea\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:400
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create ftumdtea binPath= "C:\Windows\SysWOW64\ftumdtea\zvkkpwct.exe /d\"C:\Users\Admin\AppData\Local\Temp\41dbb0db0f852fa822dfc024d3effdf27bafa549372f27244902f5fdefa25fd6N.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:1964
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description ftumdtea "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4500
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start ftumdtea
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4660
- 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:4532
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4400 -s 1236
  2⤵
  - Program crash
  PID:4644

C:\Windows\SysWOW64\ftumdtea\zvkkpwct.exe
C:\Windows\SysWOW64\ftumdtea\zvkkpwct.exe /d"C:\Users\Admin\AppData\Local\Temp\41dbb0db0f852fa822dfc024d3effdf27bafa549372f27244902f5fdefa25fd6N.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2164
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:3696
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2164 -s 564
  2⤵
  - Program crash
  PID:1908

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 460 -p 4400 -ip 4400
1⤵
PID:2912

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 540 -p 2164 -ip 2164
1⤵
PID:4448

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\zvkkpwct.exe

Filesize
13.1MB

MD5
388b67a5436dc3d53dc7c06899915744

SHA1
5392745a3c243f4c062ac1d972ad4efefd197e8f

SHA256
0d6278a189b9a222bd81101f7d9d8bc53d140422afb2cb2295a3c1792fd5689b

SHA512
703ffbf6beaa984898eaa87ff1dc06ed6ffe127f831cc56be23bd61be9dd7ffd4cbc591ebe22e1040487c97b960e7ca19e4915d90cf847cc403e62f8b5ea5a1e

Download Submit
memory/2164-15-0x0000000000400000-0x0000000002B41000-memory.dmp

Filesize
39.3MB

Download
memory/3696-11-0x0000000000450000-0x0000000000465000-memory.dmp

Filesize
84KB

Download
memory/3696-13-0x0000000000450000-0x0000000000465000-memory.dmp

Filesize
84KB

Download
memory/3696-14-0x0000000000450000-0x0000000000465000-memory.dmp

Filesize
84KB

Download
memory/4400-1-0x0000000002BA0000-0x0000000002CA0000-memory.dmp

Filesize
1024KB

Download
memory/4400-2-0x00000000048A0000-0x00000000048B3000-memory.dmp

Filesize
76KB

Download
memory/4400-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/4400-9-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/4400-8-0x00000000048A0000-0x00000000048B3000-memory.dmp

Filesize
76KB

Download
memory/4400-7-0x0000000000400000-0x0000000002B41000-memory.dmp

Filesize
39.3MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads