tofsee | 7bfa48ebaa48c2b7ae8c5e1dea8cd0f64953e1f95f60d4439d949ebb5c82673d

General

Target
7bfa48ebaa48c2b7ae8c5e1dea8cd0f64953e1f95f60d4439d949ebb5c82673d.exe
Size 13.9MB
Sample261108-nesjbact7r
SHA256 7bfa48ebaa48c2b7ae8c5e1dea8cd0f64953e1f95f60d4439d949ebb5c82673d
MD5 9f3d95cb781c228672a4250769c42781
SHA1 8633aaacd6525015e7db289ccaf02e645d0d6f0f
SHA512 2fb5825721ead494742d0217b02e0fee4649dd0dd4957f6e107809e8bd895a7d6fed23177cf16164f4a540b3b67d531b04d057a0b252deb60aaa6e9f8ec84a94
SSDEEP 49152:DlpGfrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvP:DO
TLSH
T1D1E6436676D86ED9D0CA0FBC09A1C42B5DECFB34043A553096D1504F98AE78A973CBB3
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

defense_evasion discovery execution tofsee persistence privilege_escalation trojan

Malware Config

Extracted

Family

tofsee

C2

defeatwax.ru
refabyd.info

Signatures

Family: Tofsee
Backdoor/botnet which carries out malicious activities based on commands from a C2 server.
trojan tofsee

Modifies Windows Firewall 2 TTPs 1 IoCs

defense_evasion

Windows Service

T1543.003

Disable or Modify System Firewall

T1562.004

pid	Process
2600	netsh.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-1-5-21-747854149-4118156852-591593384-1000\Control Panel\International\Geo\Nation	7bfa48ebaa48c2b7ae8c5e1dea8cd0f64953e1f95f60d4439d949ebb5c82673d.exe

Creates new service(s) 2 TTPs
persistence execution

Windows Service
T1543.003

Service Execution
T1569.002

Executes dropped EXE 1 IoCs

pid	Process
3944	zcavpwgq.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3944 set thread context of 3400	3944	zcavpwgq.exe	96

Launches sc.exe 3 IoCs

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

pid	Process
1160	sc.exe
4832	sc.exe
2928	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

Executes a command shell one-liner 1 TTPs 2 IoCs

Execution of a cmd.exe one-liner (/c "close" or /k "keep") is a common script/loader stage.

execution

Windows Command Shell

T1059.003

pid	Process
4484	cmd.exe
4208	cmd.exe

System Location Discovery: System Language Discovery 1 TTPs 8 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	7bfa48ebaa48c2b7ae8c5e1dea8cd0f64953e1f95f60d4439d949ebb5c82673d.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	zcavpwgq.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 8 IoCs

description	pid	Process	procid_target
PID 4700 wrote to memory of 4484	4700	7bfa48ebaa48c2b7ae8c5e1dea8cd0f64953e1f95f60d4439d949ebb5c82673d.exe	83
PID 4700 wrote to memory of 4208	4700	7bfa48ebaa48c2b7ae8c5e1dea8cd0f64953e1f95f60d4439d949ebb5c82673d.exe	86
PID 4700 wrote to memory of 1160	4700	7bfa48ebaa48c2b7ae8c5e1dea8cd0f64953e1f95f60d4439d949ebb5c82673d.exe	88
PID 4700 wrote to memory of 4832	4700	7bfa48ebaa48c2b7ae8c5e1dea8cd0f64953e1f95f60d4439d949ebb5c82673d.exe	90
PID 4700 wrote to memory of 2928	4700	7bfa48ebaa48c2b7ae8c5e1dea8cd0f64953e1f95f60d4439d949ebb5c82673d.exe	92
PID 3944 wrote to memory of 3400	3944	zcavpwgq.exe	96
PID 3944 wrote to memory of 3400	3944	zcavpwgq.exe	96
PID 4700 wrote to memory of 2600	4700	7bfa48ebaa48c2b7ae8c5e1dea8cd0f64953e1f95f60d4439d949ebb5c82673d.exe	99

C:\Users\Admin\AppData\Local\Temp\7bfa48ebaa48c2b7ae8c5e1dea8cd0f64953e1f95f60d4439d949ebb5c82673d.exe
"C:\Users\Admin\AppData\Local\Temp\7bfa48ebaa48c2b7ae8c5e1dea8cd0f64953e1f95f60d4439d949ebb5c82673d.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4700
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\afgqvfzp\
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  PID:4484
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\zcavpwgq.exe" C:\Windows\SysWOW64\afgqvfzp\
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  PID:4208
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create afgqvfzp binPath= "C:\Windows\SysWOW64\afgqvfzp\zcavpwgq.exe /d\"C:\Users\Admin\AppData\Local\Temp\7bfa48ebaa48c2b7ae8c5e1dea8cd0f64953e1f95f60d4439d949ebb5c82673d.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:1160
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description afgqvfzp "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4832
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start afgqvfzp
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2928
- 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:2600

C:\Windows\SysWOW64\afgqvfzp\zcavpwgq.exe
C:\Windows\SysWOW64\afgqvfzp\zcavpwgq.exe /d"C:\Users\Admin\AppData\Local\Temp\7bfa48ebaa48c2b7ae8c5e1dea8cd0f64953e1f95f60d4439d949ebb5c82673d.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3944
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  PID:3400

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

Windows Command Shell

1

T1059.003

System Services

1

T1569

Service Execution

1

T1569.002

Persistence

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

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

1

T1562.004

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

zcavpwgq.exe

Path C:\Users\Admin\AppData\Local\Temp\zcavpwgq.exe
Size 13.2MB
SHA256 a7fd68248b1f9a40bc4cd495453614ba8c2f1842f6ec0b104eefc21f7bc0bdab
MD5 c150100f2e38de1651741702ee3a83e1
SHA1 fb70021b627a5e68629a3225cb8159010cd1289b
SHA512 604f03f59b36e9e256ede595b69dc09d24be6344a1da4de1eaa592f3e72424e161009233c9393cc9863e4a6a0b81358ef0799eb1c6a1f375a1f901242a4aa217
SSDEEP 49152:nlpGfrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvD:nO
TLSH
T1E2D6436676D86ED9D0CA0FBC09A1C42B5DECFB34043A553096D1504F98AE78A973CBB3
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/3400-6-0x0000000001000000-0x0000000001049000-memory.dmp

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memory/3944-5-0x0000000000400000-0x0000000000449000-memory.dmp

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memory/3944-9-0x0000000000400000-0x0000000000449000-memory.dmp

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memory/4700-0-0x0000000000400000-0x0000000000449000-memory.dmp

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memory/4700-10-0x0000000000400000-0x0000000000449000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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