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

Processes:

netsh.exe

pid	Process
4632	netsh.exe

Sets service image path in registry 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

svchost.exe

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\vscwqvml\ImagePath = "C:\\Windows\\SysWOW64\\vscwqvml\\ajbajvzq.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

Processes:

6c2b21f0366b3942ae23d428155856a3deedccf6dcd00f3e27652a625455367d.exe

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-945322488-2060912225-3527527000-1000\Control Panel\International\Geo\Nation	6c2b21f0366b3942ae23d428155856a3deedccf6dcd00f3e27652a625455367d.exe

Deletes itself 1 IoCs

Processes:

svchost.exe

pid	Process
4168	svchost.exe

Executes dropped EXE 1 IoCs

Processes:

ajbajvzq.exe

pid	Process
4380	ajbajvzq.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

ajbajvzq.exe

description	pid	Process	procid_target
PID 4380 set thread context of 4168	4380	ajbajvzq.exe	99

Launches sc.exe 3 IoCs

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

Processes:

sc.exesc.exesc.exe

pid	Process
3020	sc.exe
660	sc.exe
3356	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

Processes:

netsh.exe

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

Processes:

cmd.exesc.exesc.exesvchost.exe6c2b21f0366b3942ae23d428155856a3deedccf6dcd00f3e27652a625455367d.execmd.exesc.exeajbajvzq.exenetsh.exe

description	ioc	Process
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	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	6c2b21f0366b3942ae23d428155856a3deedccf6dcd00f3e27652a625455367d.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	ajbajvzq.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	netsh.exe

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

6c2b21f0366b3942ae23d428155856a3deedccf6dcd00f3e27652a625455367d.exeajbajvzq.exe

description	pid	Process	procid_target
PID 2636 wrote to memory of 2384	2636	6c2b21f0366b3942ae23d428155856a3deedccf6dcd00f3e27652a625455367d.exe	86
PID 2636 wrote to memory of 2384	2636	6c2b21f0366b3942ae23d428155856a3deedccf6dcd00f3e27652a625455367d.exe	86
PID 2636 wrote to memory of 2384	2636	6c2b21f0366b3942ae23d428155856a3deedccf6dcd00f3e27652a625455367d.exe	86
PID 2636 wrote to memory of 768	2636	6c2b21f0366b3942ae23d428155856a3deedccf6dcd00f3e27652a625455367d.exe	88
PID 2636 wrote to memory of 768	2636	6c2b21f0366b3942ae23d428155856a3deedccf6dcd00f3e27652a625455367d.exe	88
PID 2636 wrote to memory of 768	2636	6c2b21f0366b3942ae23d428155856a3deedccf6dcd00f3e27652a625455367d.exe	88
PID 2636 wrote to memory of 3020	2636	6c2b21f0366b3942ae23d428155856a3deedccf6dcd00f3e27652a625455367d.exe	90
PID 2636 wrote to memory of 3020	2636	6c2b21f0366b3942ae23d428155856a3deedccf6dcd00f3e27652a625455367d.exe	90
PID 2636 wrote to memory of 3020	2636	6c2b21f0366b3942ae23d428155856a3deedccf6dcd00f3e27652a625455367d.exe	90
PID 2636 wrote to memory of 660	2636	6c2b21f0366b3942ae23d428155856a3deedccf6dcd00f3e27652a625455367d.exe	92
PID 2636 wrote to memory of 660	2636	6c2b21f0366b3942ae23d428155856a3deedccf6dcd00f3e27652a625455367d.exe	92
PID 2636 wrote to memory of 660	2636	6c2b21f0366b3942ae23d428155856a3deedccf6dcd00f3e27652a625455367d.exe	92
PID 2636 wrote to memory of 3356	2636	6c2b21f0366b3942ae23d428155856a3deedccf6dcd00f3e27652a625455367d.exe	96
PID 2636 wrote to memory of 3356	2636	6c2b21f0366b3942ae23d428155856a3deedccf6dcd00f3e27652a625455367d.exe	96
PID 2636 wrote to memory of 3356	2636	6c2b21f0366b3942ae23d428155856a3deedccf6dcd00f3e27652a625455367d.exe	96
PID 4380 wrote to memory of 4168	4380	ajbajvzq.exe	99
PID 4380 wrote to memory of 4168	4380	ajbajvzq.exe	99
PID 4380 wrote to memory of 4168	4380	ajbajvzq.exe	99
PID 4380 wrote to memory of 4168	4380	ajbajvzq.exe	99
PID 4380 wrote to memory of 4168	4380	ajbajvzq.exe	99
PID 2636 wrote to memory of 4632	2636	6c2b21f0366b3942ae23d428155856a3deedccf6dcd00f3e27652a625455367d.exe	100
PID 2636 wrote to memory of 4632	2636	6c2b21f0366b3942ae23d428155856a3deedccf6dcd00f3e27652a625455367d.exe	100
PID 2636 wrote to memory of 4632	2636	6c2b21f0366b3942ae23d428155856a3deedccf6dcd00f3e27652a625455367d.exe	100

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:2636
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\vscwqvml\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2384
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\ajbajvzq.exe" C:\Windows\SysWOW64\vscwqvml\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:768
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create vscwqvml binPath= "C:\Windows\SysWOW64\vscwqvml\ajbajvzq.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:3020
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description vscwqvml "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:660
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start vscwqvml
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3356
- 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:4632

C:\Windows\SysWOW64\vscwqvml\ajbajvzq.exe
C:\Windows\SysWOW64\vscwqvml\ajbajvzq.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:4380
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:4168

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\ajbajvzq.exe

Filesize
11.6MB

MD5
ebb5bb80c2221f696dba6430475b871d

SHA1
452a745d2623403aafb9548dd184a5df46e5af6d

SHA256
14cafb30130e28560dc8469d9a14c562fecfb9867dcd9ac5803e91848142e5d7

SHA512
5dd2d08bc6dea1961028b7f28ea1ebfa4f62f5dc9c17768116d3740276ec8e244f16d60613f95a4ee861497733c4ef44bc80d732bf1ae1052d2c61653444d9f4

Download Submit
memory/2636-0-0x00000000009D0000-0x00000000009D1000-memory.dmp

Filesize
4KB

Download
memory/2636-2-0x00000000009F0000-0x00000000009F1000-memory.dmp

Filesize
4KB

Download
memory/2636-1-0x0000000000400000-0x000000000041C000-memory.dmp

Filesize
112KB

Download
memory/2636-12-0x0000000000400000-0x000000000041C000-memory.dmp

Filesize
112KB

Download
memory/4168-7-0x0000000000FA0000-0x0000000000FB5000-memory.dmp

Filesize
84KB

Download
memory/4168-11-0x0000000000FA0000-0x0000000000FB5000-memory.dmp

Filesize
84KB

Download
memory/4168-13-0x0000000000FA0000-0x0000000000FB5000-memory.dmp

Filesize
84KB

Download
memory/4168-14-0x0000000000FA0000-0x0000000000FB5000-memory.dmp

Filesize
84KB

Download
memory/4168-15-0x0000000000FA0000-0x0000000000FB5000-memory.dmp

Filesize
84KB

Download
memory/4380-10-0x0000000000400000-0x000000000041C000-memory.dmp

Filesize
112KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads