tofsee | 4ba2331be4aba69cc1be792caf33d02993bf36b7d75835dac3c541153ab6a919

Analysis

max time kernel
146s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
03/09/2024, 13:36

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General

Target
202409031415fb28d4ec24974686845f861affd4mafia.exe
Size 11.0MB
Sample240903-qwa2psyhra
SHA256 4ba2331be4aba69cc1be792caf33d02993bf36b7d75835dac3c541153ab6a919
MD5 1415fb28d4ec24974686845f861affd4
SHA1 54f4df7f0d829b32e39f01203f6d1b1703f9be21
SHA512 ac79a64a940ae7078a9e424bd282e091cfbd77869f63ef5e9bd9befdbf09fe3ce2731aa9ef6fb2750d7c1deea1853bc3ce5dabef61797bbdca10a8d645a259ba
SSDEEP 6144:3+rWO2zeSPDjMXMH7Ll4aFpWVqIwUAP97GEwHrG2+e1x2:3+r1IeSXMXc7LlxWV4Ug97GZ+ej
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

tofsee discovery evasion execution persistence privilege_escalation trojan

Malware Config

Extracted

Family

tofsee

43.231.4.7
lazystax.ru

Signatures

Tofsee
Backdoor/botnet which carries out malicious activities based on commands from a C2 server.
trojan 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
5004	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\zsskpues\ImagePath = "C:\\Windows\\SysWOW64\\zsskpues\\tfgavrsp.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-1-5-21-945322488-2060912225-3527527000-1000\Control Panel\International\Geo\Nation	202409031415fb28d4ec24974686845f861affd4mafia.exe

Deletes itself 1 IoCs

pid	Process
2740	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2392	tfgavrsp.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2392 set thread context of 2740	2392	tfgavrsp.exe	99

Launches sc.exe 3 IoCs

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

pid	Process
4980	sc.exe
4716	sc.exe
1052	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

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	netsh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	202409031415fb28d4ec24974686845f861affd4mafia.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	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	tfgavrsp.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 1060 wrote to memory of 2728	1060	202409031415fb28d4ec24974686845f861affd4mafia.exe	86
PID 1060 wrote to memory of 2728	1060	202409031415fb28d4ec24974686845f861affd4mafia.exe	86
PID 1060 wrote to memory of 2728	1060	202409031415fb28d4ec24974686845f861affd4mafia.exe	86
PID 1060 wrote to memory of 3652	1060	202409031415fb28d4ec24974686845f861affd4mafia.exe	88
PID 1060 wrote to memory of 3652	1060	202409031415fb28d4ec24974686845f861affd4mafia.exe	88
PID 1060 wrote to memory of 3652	1060	202409031415fb28d4ec24974686845f861affd4mafia.exe	88
PID 1060 wrote to memory of 1052	1060	202409031415fb28d4ec24974686845f861affd4mafia.exe	90
PID 1060 wrote to memory of 1052	1060	202409031415fb28d4ec24974686845f861affd4mafia.exe	90
PID 1060 wrote to memory of 1052	1060	202409031415fb28d4ec24974686845f861affd4mafia.exe	90
PID 1060 wrote to memory of 4980	1060	202409031415fb28d4ec24974686845f861affd4mafia.exe	92
PID 1060 wrote to memory of 4980	1060	202409031415fb28d4ec24974686845f861affd4mafia.exe	92
PID 1060 wrote to memory of 4980	1060	202409031415fb28d4ec24974686845f861affd4mafia.exe	92
PID 1060 wrote to memory of 4716	1060	202409031415fb28d4ec24974686845f861affd4mafia.exe	94
PID 1060 wrote to memory of 4716	1060	202409031415fb28d4ec24974686845f861affd4mafia.exe	94
PID 1060 wrote to memory of 4716	1060	202409031415fb28d4ec24974686845f861affd4mafia.exe	94
PID 1060 wrote to memory of 5004	1060	202409031415fb28d4ec24974686845f861affd4mafia.exe	97
PID 1060 wrote to memory of 5004	1060	202409031415fb28d4ec24974686845f861affd4mafia.exe	97
PID 1060 wrote to memory of 5004	1060	202409031415fb28d4ec24974686845f861affd4mafia.exe	97
PID 2392 wrote to memory of 2740	2392	tfgavrsp.exe	99
PID 2392 wrote to memory of 2740	2392	tfgavrsp.exe	99
PID 2392 wrote to memory of 2740	2392	tfgavrsp.exe	99
PID 2392 wrote to memory of 2740	2392	tfgavrsp.exe	99
PID 2392 wrote to memory of 2740	2392	tfgavrsp.exe	99

C:\Users\Admin\AppData\Local\Temp\202409031415fb28d4ec24974686845f861affd4mafia.exe
"C:\Users\Admin\AppData\Local\Temp\202409031415fb28d4ec24974686845f861affd4mafia.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1060
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\zsskpues\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2728
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\tfgavrsp.exe" C:\Windows\SysWOW64\zsskpues\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:3652
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create zsskpues binPath= "C:\Windows\SysWOW64\zsskpues\tfgavrsp.exe /d\"C:\Users\Admin\AppData\Local\Temp\202409031415fb28d4ec24974686845f861affd4mafia.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:1052
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description zsskpues "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4980
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start zsskpues
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4716
- 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:5004

C:\Windows\SysWOW64\zsskpues\tfgavrsp.exe
C:\Windows\SysWOW64\zsskpues\tfgavrsp.exe /d"C:\Users\Admin\AppData\Local\Temp\202409031415fb28d4ec24974686845f861affd4mafia.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2392
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:2740

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

tfgavrsp.exe

Path C:\Users\Admin\AppData\Local\Temp\tfgavrsp.exe
Size 12.0MB
SHA256 dd7b83a02d8d76a05dae6181ff0a11deb70ae45a96a707303f41c4b470cd9d12
MD5 3790c7b4cfc1c5beb1cdd850ff1c2489
SHA1 a47f868b39ed5a7719f24675aad3cee73847c172
SHA512 d2034578ac6c01e82e215c16d58a792f1ac3434563554e48067d1ce3c1e762de83d66db1010392c4046d182e84846331150fd53817e1a1affed1f67a754b915d
SSDEEP 6144:V+rWO2zeSPDjMXMH7Ll4aFpWVqIwUAP97GEwHrG2+e1x2:V+r1IeSXMXc7LlxWV4Ug97GZ+ej
MD5 SHA1 SHA512 SSDEEP

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memory/1060-1-0x0000000000850000-0x0000000000950000-memory.dmp

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memory/1060-2-0x0000000000400000-0x0000000000415000-memory.dmp

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memory/1060-7-0x0000000000400000-0x0000000000415000-memory.dmp

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memory/1060-6-0x0000000000400000-0x000000000051A000-memory.dmp

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memory/2392-9-0x0000000000400000-0x000000000051A000-memory.dmp

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memory/2392-10-0x0000000000400000-0x000000000051A000-memory.dmp

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memory/2392-15-0x0000000000400000-0x000000000051A000-memory.dmp

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memory/2740-11-0x0000000000B40000-0x0000000000B55000-memory.dmp

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memory/2740-14-0x0000000000B40000-0x0000000000B55000-memory.dmp

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memory/2740-16-0x0000000000B40000-0x0000000000B55000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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