tofsee | 6c2b21f0366b3942ae23d428155856a3deedccf6dcd00f3e27652a625455367d

General

Target

6c2b21f0366b3942ae23d428155856a3deedccf6dcd00f3e27652a625455367d.exe
Size

13.9MB
MD5

38497df5caa858a3e65f3946bb0e28bf
SHA1

2446e498831b099bc15c37c295387e1c049fc702
SHA256

6c2b21f0366b3942ae23d428155856a3deedccf6dcd00f3e27652a625455367d
SHA512

a172f7b7b005a72069cab497a0b3dfb79badf1b899e990c959eb0b830db4a91250c137e8e5fdf74920ca59a2ede93de39a7f85b774fe7342c1f228ab4b15bf86
SSDEEP

12288:KzpKS0FRvqPKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKn:oMS

Score

10^/10

tofsee discovery evasion execution persistence privilege_escalation trojan

Malware Config

Extracted

Family

tofsee

C2

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
4456	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\nctwbjae\ImagePath = "C:\\Windows\\SysWOW64\\nctwbjae\\vugchrbo.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-1-5-21-523280732-2327480845-3730041215-1000\Control Panel\International\Geo\Nation	6c2b21f0366b3942ae23d428155856a3deedccf6dcd00f3e27652a625455367d.exe

Deletes itself 1 IoCs

pid	Process
3552	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
948	vugchrbo.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 948 set thread context of 3552	948	vugchrbo.exe	98

Launches sc.exe 3 IoCs

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

pid	Process
5104	sc.exe
4932	sc.exe
4428	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	6c2b21f0366b3942ae23d428155856a3deedccf6dcd00f3e27652a625455367d.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	netsh.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	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	vugchrbo.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	cmd.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 4692 wrote to memory of 2856	4692	6c2b21f0366b3942ae23d428155856a3deedccf6dcd00f3e27652a625455367d.exe	86
PID 4692 wrote to memory of 2856	4692	6c2b21f0366b3942ae23d428155856a3deedccf6dcd00f3e27652a625455367d.exe	86
PID 4692 wrote to memory of 2856	4692	6c2b21f0366b3942ae23d428155856a3deedccf6dcd00f3e27652a625455367d.exe	86
PID 4692 wrote to memory of 4972	4692	6c2b21f0366b3942ae23d428155856a3deedccf6dcd00f3e27652a625455367d.exe	88
PID 4692 wrote to memory of 4972	4692	6c2b21f0366b3942ae23d428155856a3deedccf6dcd00f3e27652a625455367d.exe	88
PID 4692 wrote to memory of 4972	4692	6c2b21f0366b3942ae23d428155856a3deedccf6dcd00f3e27652a625455367d.exe	88
PID 4692 wrote to memory of 5104	4692	6c2b21f0366b3942ae23d428155856a3deedccf6dcd00f3e27652a625455367d.exe	91
PID 4692 wrote to memory of 5104	4692	6c2b21f0366b3942ae23d428155856a3deedccf6dcd00f3e27652a625455367d.exe	91
PID 4692 wrote to memory of 5104	4692	6c2b21f0366b3942ae23d428155856a3deedccf6dcd00f3e27652a625455367d.exe	91
PID 4692 wrote to memory of 4932	4692	6c2b21f0366b3942ae23d428155856a3deedccf6dcd00f3e27652a625455367d.exe	93
PID 4692 wrote to memory of 4932	4692	6c2b21f0366b3942ae23d428155856a3deedccf6dcd00f3e27652a625455367d.exe	93
PID 4692 wrote to memory of 4932	4692	6c2b21f0366b3942ae23d428155856a3deedccf6dcd00f3e27652a625455367d.exe	93
PID 4692 wrote to memory of 4428	4692	6c2b21f0366b3942ae23d428155856a3deedccf6dcd00f3e27652a625455367d.exe	95
PID 4692 wrote to memory of 4428	4692	6c2b21f0366b3942ae23d428155856a3deedccf6dcd00f3e27652a625455367d.exe	95
PID 4692 wrote to memory of 4428	4692	6c2b21f0366b3942ae23d428155856a3deedccf6dcd00f3e27652a625455367d.exe	95
PID 948 wrote to memory of 3552	948	vugchrbo.exe	98
PID 948 wrote to memory of 3552	948	vugchrbo.exe	98
PID 948 wrote to memory of 3552	948	vugchrbo.exe	98
PID 948 wrote to memory of 3552	948	vugchrbo.exe	98
PID 948 wrote to memory of 3552	948	vugchrbo.exe	98
PID 4692 wrote to memory of 4456	4692	6c2b21f0366b3942ae23d428155856a3deedccf6dcd00f3e27652a625455367d.exe	99
PID 4692 wrote to memory of 4456	4692	6c2b21f0366b3942ae23d428155856a3deedccf6dcd00f3e27652a625455367d.exe	99
PID 4692 wrote to memory of 4456	4692	6c2b21f0366b3942ae23d428155856a3deedccf6dcd00f3e27652a625455367d.exe	99

C:\Users\Admin\AppData\Local\Temp\6c2b21f0366b3942ae23d428155856a3deedccf6dcd00f3e27652a625455367d.exe
"C:\Users\Admin\AppData\Local\Temp\6c2b21f0366b3942ae23d428155856a3deedccf6dcd00f3e27652a625455367d.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4692
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\nctwbjae\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2856
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\vugchrbo.exe" C:\Windows\SysWOW64\nctwbjae\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4972
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create nctwbjae binPath= "C:\Windows\SysWOW64\nctwbjae\vugchrbo.exe /d\"C:\Users\Admin\AppData\Local\Temp\6c2b21f0366b3942ae23d428155856a3deedccf6dcd00f3e27652a625455367d.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:5104
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description nctwbjae "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4932
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start nctwbjae
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4428
- 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:4456

C:\Windows\SysWOW64\nctwbjae\vugchrbo.exe
C:\Windows\SysWOW64\nctwbjae\vugchrbo.exe /d"C:\Users\Admin\AppData\Local\Temp\6c2b21f0366b3942ae23d428155856a3deedccf6dcd00f3e27652a625455367d.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:948
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:3552

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\vugchrbo.exe

Filesize
14.6MB

MD5
a5ed23ce5769ade03ba657922b56b890

SHA1
5c4a63c4157a7ed20e3fea1b809a4348670edf2b

SHA256
beadc5b8c2bd638e3af2f290c447770abb83b75c131213ab1a650c3392c8c7ce

SHA512
782d290edb77c6befcfa9ce88fe37dbe5a5c8049813721a5c702d7a96a9a0f71de86ab7e8ef7286352713b0debc0c82888d959a6bd8610a77d829abf8a129a58

Download Submit
memory/948-6-0x0000000000B50000-0x0000000000B51000-memory.dmp

Filesize
4KB

Download
memory/948-11-0x0000000000400000-0x000000000041C000-memory.dmp

Filesize
112KB

Download
memory/3552-8-0x00000000010B0000-0x00000000010C5000-memory.dmp

Filesize
84KB

Download
memory/3552-12-0x00000000010B0000-0x00000000010C5000-memory.dmp

Filesize
84KB

Download
memory/3552-14-0x00000000010B0000-0x00000000010C5000-memory.dmp

Filesize
84KB

Download
memory/3552-15-0x00000000010B0000-0x00000000010C5000-memory.dmp

Filesize
84KB

Download
memory/3552-16-0x00000000010B0000-0x00000000010C5000-memory.dmp

Filesize
84KB

Download
memory/4692-0-0x00000000009C0000-0x00000000009C1000-memory.dmp

Filesize
4KB

Download
memory/4692-2-0x00000000009E0000-0x00000000009E1000-memory.dmp

Filesize
4KB

Download
memory/4692-1-0x0000000000400000-0x000000000041C000-memory.dmp

Filesize
112KB

Download
memory/4692-13-0x0000000000400000-0x000000000041C000-memory.dmp

Filesize
112KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads