tofsee | c79cbf63cee774ce8b02a785ad7ffbc956bd417c42598cd31e382aa88f2a6add

Analysis

max time kernel
119s
max time network
123s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
23/11/2024, 01:05

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General

Target
c79cbf63cee774ce8b02a785ad7ffbc956bd417c42598cd31e382aa88f2a6add.exe
Size 12.8MB
Sample241123-bfp4cstndx
SHA256 c79cbf63cee774ce8b02a785ad7ffbc956bd417c42598cd31e382aa88f2a6add
MD5 75aaf5422bdf991928937b7d656080f5
SHA1 425ccba2469fc3bfad5ca0a9b5f3a1f8a6acac6c
SHA512 a4e45f29c106e3c166c887d44e349940ce581ea07eed15b1f465a30ccbae470e586c9cee37de85a8dd4bf6253f07bf272fac5bf9114601a25c78865b2a75ecc2
SSDEEP 49152:cN8888888888888888888888888888888888888888888888888888888888888u:0
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

tofsee discovery evasion execution persistence privilege_escalation trojan

Malware Config

Extracted

Family

tofsee

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
2708	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\ppazslbi\ImagePath = "C:\\Windows\\SysWOW64\\ppazslbi\\iettyflc.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-1-5-21-3227495264-2217614367-4027411560-1000\Control Panel\International\Geo\Nation	c79cbf63cee774ce8b02a785ad7ffbc956bd417c42598cd31e382aa88f2a6add.exe

Deletes itself 1 IoCs

pid	Process
936	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
1200	iettyflc.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1200 set thread context of 936	1200	iettyflc.exe	103

Launches sc.exe 3 IoCs

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

pid	Process
2496	sc.exe
4704	sc.exe
2600	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 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

pid	pid_target	Process	procid_target
1300	5068	WerFault.exe	81
2160	1200	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	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	netsh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	iettyflc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	c79cbf63cee774ce8b02a785ad7ffbc956bd417c42598cd31e382aa88f2a6add.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

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 5068 wrote to memory of 544	5068	c79cbf63cee774ce8b02a785ad7ffbc956bd417c42598cd31e382aa88f2a6add.exe	82
PID 5068 wrote to memory of 544	5068	c79cbf63cee774ce8b02a785ad7ffbc956bd417c42598cd31e382aa88f2a6add.exe	82
PID 5068 wrote to memory of 544	5068	c79cbf63cee774ce8b02a785ad7ffbc956bd417c42598cd31e382aa88f2a6add.exe	82
PID 5068 wrote to memory of 2552	5068	c79cbf63cee774ce8b02a785ad7ffbc956bd417c42598cd31e382aa88f2a6add.exe	86
PID 5068 wrote to memory of 2552	5068	c79cbf63cee774ce8b02a785ad7ffbc956bd417c42598cd31e382aa88f2a6add.exe	86
PID 5068 wrote to memory of 2552	5068	c79cbf63cee774ce8b02a785ad7ffbc956bd417c42598cd31e382aa88f2a6add.exe	86
PID 5068 wrote to memory of 2496	5068	c79cbf63cee774ce8b02a785ad7ffbc956bd417c42598cd31e382aa88f2a6add.exe	88
PID 5068 wrote to memory of 2496	5068	c79cbf63cee774ce8b02a785ad7ffbc956bd417c42598cd31e382aa88f2a6add.exe	88
PID 5068 wrote to memory of 2496	5068	c79cbf63cee774ce8b02a785ad7ffbc956bd417c42598cd31e382aa88f2a6add.exe	88
PID 5068 wrote to memory of 4704	5068	c79cbf63cee774ce8b02a785ad7ffbc956bd417c42598cd31e382aa88f2a6add.exe	92
PID 5068 wrote to memory of 4704	5068	c79cbf63cee774ce8b02a785ad7ffbc956bd417c42598cd31e382aa88f2a6add.exe	92
PID 5068 wrote to memory of 4704	5068	c79cbf63cee774ce8b02a785ad7ffbc956bd417c42598cd31e382aa88f2a6add.exe	92
PID 5068 wrote to memory of 2600	5068	c79cbf63cee774ce8b02a785ad7ffbc956bd417c42598cd31e382aa88f2a6add.exe	94
PID 5068 wrote to memory of 2600	5068	c79cbf63cee774ce8b02a785ad7ffbc956bd417c42598cd31e382aa88f2a6add.exe	94
PID 5068 wrote to memory of 2600	5068	c79cbf63cee774ce8b02a785ad7ffbc956bd417c42598cd31e382aa88f2a6add.exe	94
PID 5068 wrote to memory of 2708	5068	c79cbf63cee774ce8b02a785ad7ffbc956bd417c42598cd31e382aa88f2a6add.exe	97
PID 5068 wrote to memory of 2708	5068	c79cbf63cee774ce8b02a785ad7ffbc956bd417c42598cd31e382aa88f2a6add.exe	97
PID 5068 wrote to memory of 2708	5068	c79cbf63cee774ce8b02a785ad7ffbc956bd417c42598cd31e382aa88f2a6add.exe	97
PID 1200 wrote to memory of 936	1200	iettyflc.exe	103
PID 1200 wrote to memory of 936	1200	iettyflc.exe	103
PID 1200 wrote to memory of 936	1200	iettyflc.exe	103
PID 1200 wrote to memory of 936	1200	iettyflc.exe	103
PID 1200 wrote to memory of 936	1200	iettyflc.exe	103

C:\Users\Admin\AppData\Local\Temp\c79cbf63cee774ce8b02a785ad7ffbc956bd417c42598cd31e382aa88f2a6add.exe
"C:\Users\Admin\AppData\Local\Temp\c79cbf63cee774ce8b02a785ad7ffbc956bd417c42598cd31e382aa88f2a6add.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:5068
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\ppazslbi\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:544
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\iettyflc.exe" C:\Windows\SysWOW64\ppazslbi\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2552
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create ppazslbi binPath= "C:\Windows\SysWOW64\ppazslbi\iettyflc.exe /d\"C:\Users\Admin\AppData\Local\Temp\c79cbf63cee774ce8b02a785ad7ffbc956bd417c42598cd31e382aa88f2a6add.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2496
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description ppazslbi "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4704
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start ppazslbi
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2600
- 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:2708
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 5068 -s 892
  2⤵
  - Program crash
  PID:1300

C:\Windows\SysWOW64\ppazslbi\iettyflc.exe
C:\Windows\SysWOW64\ppazslbi\iettyflc.exe /d"C:\Users\Admin\AppData\Local\Temp\c79cbf63cee774ce8b02a785ad7ffbc956bd417c42598cd31e382aa88f2a6add.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1200
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:936
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1200 -s 512
  2⤵
  - Program crash
  PID:2160

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 5068 -ip 5068
1⤵
PID:4048

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 484 -p 1200 -ip 1200
1⤵
PID:2292

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

System Services

T1569

Service Execution

T1569.002

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Create or Modify System Process

T1543

Windows Service

T1543.003

Event Triggered Execution

T1546

Netsh Helper DLL

T1546.007

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Create or Modify System Process

T1543

Windows Service

T1543.003

Event Triggered Execution

T1546

Netsh Helper DLL

T1546.007

Defense Evasion

Impair Defenses

T1562

Disable or Modify System Firewall

T1562.004

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

iettyflc.exe

Path C:\Users\Admin\AppData\Local\Temp\iettyflc.exe
Size 10.8MB
SHA256 1375a019206640d9e7f96271606283bfd8419214ff768682c931de9e08ed1d23
MD5 c0406edbb525badfd0b725f8da591914
SHA1 408fcbb1c6a3bf34a83f8082c6f89f622ffceab2
SHA512 e0c32a776a6b5921364942cd29f6896aaeb4bafcfe9056e5ea018c592a748f05d76cc2896f8e5f3245dec2c02ac28361150d495b49d72d91893af98cbcc44173
SSDEEP 49152:qN8888888888888888888888888888888888888888888888888888888888888E:
MD5 SHA1 SHA512 SSDEEP

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memory/936-10-0x00000000012D0000-0x00000000012E5000-memory.dmp

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memory/936-12-0x00000000012D0000-0x00000000012E5000-memory.dmp

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memory/936-13-0x00000000012D0000-0x00000000012E5000-memory.dmp

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memory/1200-14-0x0000000000400000-0x0000000002F05000-memory.dmp

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memory/5068-0-0x00000000031A0000-0x00000000031AD000-memory.dmp

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memory/5068-1-0x00000000031B0000-0x00000000031C3000-memory.dmp

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memory/5068-2-0x0000000000400000-0x0000000000415000-memory.dmp

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memory/5068-9-0x0000000000400000-0x0000000000415000-memory.dmp

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memory/5068-8-0x00000000031B0000-0x00000000031C3000-memory.dmp

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memory/5068-7-0x00000000031A0000-0x00000000031AD000-memory.dmp

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memory/5068-6-0x0000000000400000-0x0000000002F05000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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