tofsee | bce3694725d1ffe6c07fdfaa7b72f20ae3b458bbd713bcb12aa6f0692d1f4794

General

Target

bce3694725d1ffe6c07fdfaa7b72f20ae3b458bbd713bcb12aa6f0692d1f4794.exe
Size

10.0MB
MD5

e73ea7459977529317345e65c0f15267
SHA1

345f6930733b34578650cb65168ee93aa45457eb
SHA256

bce3694725d1ffe6c07fdfaa7b72f20ae3b458bbd713bcb12aa6f0692d1f4794
SHA512

1e89c8bac3fbfe785d271ba48680b50c259438b7816429b6dfa5d976fc46276a4749c837576667fac90249e50182691d52cee0d11b6d8ef1db97dedcf16113f0
SSDEEP

49152:bkHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHP:I

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
2584	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\cyxsejop\ImagePath = "C:\\Windows\\SysWOW64\\cyxsejop\\wblbpu.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-1-5-21-4089630652-1596403869-279772308-1000\Control Panel\International\Geo\Nation	bce3694725d1ffe6c07fdfaa7b72f20ae3b458bbd713bcb12aa6f0692d1f4794.exe

Deletes itself 1 IoCs

pid	Process
4224	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2020	wblbpu.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2020 set thread context of 4224	2020	wblbpu.exe	102

Launches sc.exe 3 IoCs

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

pid	Process
4056	sc.exe
3124	sc.exe
1208	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
4156	1620	WerFault.exe	81
3028	2020	WerFault.exe	94

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	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	wblbpu.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	bce3694725d1ffe6c07fdfaa7b72f20ae3b458bbd713bcb12aa6f0692d1f4794.exe
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	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 1620 wrote to memory of 3684	1620	bce3694725d1ffe6c07fdfaa7b72f20ae3b458bbd713bcb12aa6f0692d1f4794.exe	82
PID 1620 wrote to memory of 3684	1620	bce3694725d1ffe6c07fdfaa7b72f20ae3b458bbd713bcb12aa6f0692d1f4794.exe	82
PID 1620 wrote to memory of 3684	1620	bce3694725d1ffe6c07fdfaa7b72f20ae3b458bbd713bcb12aa6f0692d1f4794.exe	82
PID 1620 wrote to memory of 2032	1620	bce3694725d1ffe6c07fdfaa7b72f20ae3b458bbd713bcb12aa6f0692d1f4794.exe	84
PID 1620 wrote to memory of 2032	1620	bce3694725d1ffe6c07fdfaa7b72f20ae3b458bbd713bcb12aa6f0692d1f4794.exe	84
PID 1620 wrote to memory of 2032	1620	bce3694725d1ffe6c07fdfaa7b72f20ae3b458bbd713bcb12aa6f0692d1f4794.exe	84
PID 1620 wrote to memory of 4056	1620	bce3694725d1ffe6c07fdfaa7b72f20ae3b458bbd713bcb12aa6f0692d1f4794.exe	86
PID 1620 wrote to memory of 4056	1620	bce3694725d1ffe6c07fdfaa7b72f20ae3b458bbd713bcb12aa6f0692d1f4794.exe	86
PID 1620 wrote to memory of 4056	1620	bce3694725d1ffe6c07fdfaa7b72f20ae3b458bbd713bcb12aa6f0692d1f4794.exe	86
PID 1620 wrote to memory of 3124	1620	bce3694725d1ffe6c07fdfaa7b72f20ae3b458bbd713bcb12aa6f0692d1f4794.exe	88
PID 1620 wrote to memory of 3124	1620	bce3694725d1ffe6c07fdfaa7b72f20ae3b458bbd713bcb12aa6f0692d1f4794.exe	88
PID 1620 wrote to memory of 3124	1620	bce3694725d1ffe6c07fdfaa7b72f20ae3b458bbd713bcb12aa6f0692d1f4794.exe	88
PID 1620 wrote to memory of 1208	1620	bce3694725d1ffe6c07fdfaa7b72f20ae3b458bbd713bcb12aa6f0692d1f4794.exe	92
PID 1620 wrote to memory of 1208	1620	bce3694725d1ffe6c07fdfaa7b72f20ae3b458bbd713bcb12aa6f0692d1f4794.exe	92
PID 1620 wrote to memory of 1208	1620	bce3694725d1ffe6c07fdfaa7b72f20ae3b458bbd713bcb12aa6f0692d1f4794.exe	92
PID 1620 wrote to memory of 2584	1620	bce3694725d1ffe6c07fdfaa7b72f20ae3b458bbd713bcb12aa6f0692d1f4794.exe	95
PID 1620 wrote to memory of 2584	1620	bce3694725d1ffe6c07fdfaa7b72f20ae3b458bbd713bcb12aa6f0692d1f4794.exe	95
PID 1620 wrote to memory of 2584	1620	bce3694725d1ffe6c07fdfaa7b72f20ae3b458bbd713bcb12aa6f0692d1f4794.exe	95
PID 2020 wrote to memory of 4224	2020	wblbpu.exe	102
PID 2020 wrote to memory of 4224	2020	wblbpu.exe	102
PID 2020 wrote to memory of 4224	2020	wblbpu.exe	102
PID 2020 wrote to memory of 4224	2020	wblbpu.exe	102
PID 2020 wrote to memory of 4224	2020	wblbpu.exe	102

C:\Users\Admin\AppData\Local\Temp\bce3694725d1ffe6c07fdfaa7b72f20ae3b458bbd713bcb12aa6f0692d1f4794.exe
"C:\Users\Admin\AppData\Local\Temp\bce3694725d1ffe6c07fdfaa7b72f20ae3b458bbd713bcb12aa6f0692d1f4794.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1620
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\cyxsejop\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:3684
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\wblbpu.exe" C:\Windows\SysWOW64\cyxsejop\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2032
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create cyxsejop binPath= "C:\Windows\SysWOW64\cyxsejop\wblbpu.exe /d\"C:\Users\Admin\AppData\Local\Temp\bce3694725d1ffe6c07fdfaa7b72f20ae3b458bbd713bcb12aa6f0692d1f4794.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4056
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description cyxsejop "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3124
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start cyxsejop
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:1208
- 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:2584
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1620 -s 1280
  2⤵
  - Program crash
  PID:4156

C:\Windows\SysWOW64\cyxsejop\wblbpu.exe
C:\Windows\SysWOW64\cyxsejop\wblbpu.exe /d"C:\Users\Admin\AppData\Local\Temp\bce3694725d1ffe6c07fdfaa7b72f20ae3b458bbd713bcb12aa6f0692d1f4794.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2020
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:4224
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2020 -s 516
  2⤵
  - Program crash
  PID:3028

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 436 -p 1620 -ip 1620
1⤵
PID:1920

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 420 -p 2020 -ip 2020
1⤵
PID:2148

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\wblbpu.exe

Filesize
13.0MB

MD5
0531ddf3e605963352dcef59c6a0f5b7

SHA1
3e4be4693c2e39e2251e3ecaa20d2cfea27100b6

SHA256
41ef27ff19cb04eaf6a9c5ccd369b808f4dde3e0d67139cd1790e9a093d86ddb

SHA512
83475b90993154b2b9bb38164d4bd4c3edcf9cf18b648c78c488307cdc782f9fe17d40a9732fc74094df13a4000189fa40f18e6fd994fd2260719d2dbf5d3415

Download Submit
memory/1620-2-0x00000000024D0000-0x00000000024E3000-memory.dmp

Filesize
76KB

Download
memory/1620-1-0x0000000000830000-0x0000000000930000-memory.dmp

Filesize
1024KB

Download
memory/1620-4-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/1620-10-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/1620-9-0x00000000024D0000-0x00000000024E3000-memory.dmp

Filesize
76KB

Download
memory/1620-8-0x0000000000400000-0x0000000000785000-memory.dmp

Filesize
3.5MB

Download
memory/2020-11-0x0000000000400000-0x0000000000785000-memory.dmp

Filesize
3.5MB

Download
memory/2020-16-0x0000000000400000-0x0000000000785000-memory.dmp

Filesize
3.5MB

Download
memory/4224-12-0x0000000000810000-0x0000000000825000-memory.dmp

Filesize
84KB

Download
memory/4224-14-0x0000000000810000-0x0000000000825000-memory.dmp

Filesize
84KB

Download
memory/4224-15-0x0000000000810000-0x0000000000825000-memory.dmp

Filesize
84KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads