tofsee | 6e821f80b294536e0508db0fd37feb792c7adfffe6a057930abfd9630f55ac74

Analysis

max time kernel
146s
max time network
146s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
03-09-2024 20:32

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General

Target

307644b1154391b4f425896da8efd9480fb3dda0f56c633b08c32058f5b469fa.exe
Size

10.1MB
MD5

ff3556fcc81946e1a83ab271568bbd36
SHA1

2e74da5aec95c19c0521f80b0d019058c5fa2fad
SHA256

307644b1154391b4f425896da8efd9480fb3dda0f56c633b08c32058f5b469fa
SHA512

c4c583736516d16ef249169af8668dde9e7e06cc534538c68e594bd68ca284784f5c766db8cb796669362bf1816e58d1790b38ffe757cf0a08ed4bb69d890eb6
SSDEEP

98304:qC+PPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPP/:p

Score

10^/10

tofsee discovery evasion execution persistence privilege_escalation trojan

Malware Config

Extracted

Family

tofsee

defeatwax.ru

refabyd.info

Signatures

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

Windows security bypass 2 TTPs 1 IoCs

evasion trojan

Disable or Modify Tools

T1562.001

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths\C:\Windows\SysWOW64\espczwyd = "0"	svchost.exe

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
2764	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\espczwyd\ImagePath = "C:\\Windows\\SysWOW64\\espczwyd\\vtdbbraq.exe"	svchost.exe

Deletes itself 1 IoCs

pid	Process
1988	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2300	vtdbbraq.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2300 set thread context of 1988	2300	vtdbbraq.exe	43

Launches sc.exe 3 IoCs

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

pid	Process
2428	sc.exe
2832	sc.exe
2752	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	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	vtdbbraq.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
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
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	307644b1154391b4f425896da8efd9480fb3dda0f56c633b08c32058f5b469fa.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 2504 wrote to memory of 1788	2504	307644b1154391b4f425896da8efd9480fb3dda0f56c633b08c32058f5b469fa.exe	30
PID 2504 wrote to memory of 1788	2504	307644b1154391b4f425896da8efd9480fb3dda0f56c633b08c32058f5b469fa.exe	30
PID 2504 wrote to memory of 1788	2504	307644b1154391b4f425896da8efd9480fb3dda0f56c633b08c32058f5b469fa.exe	30
PID 2504 wrote to memory of 1788	2504	307644b1154391b4f425896da8efd9480fb3dda0f56c633b08c32058f5b469fa.exe	30
PID 2504 wrote to memory of 2404	2504	307644b1154391b4f425896da8efd9480fb3dda0f56c633b08c32058f5b469fa.exe	32
PID 2504 wrote to memory of 2404	2504	307644b1154391b4f425896da8efd9480fb3dda0f56c633b08c32058f5b469fa.exe	32
PID 2504 wrote to memory of 2404	2504	307644b1154391b4f425896da8efd9480fb3dda0f56c633b08c32058f5b469fa.exe	32
PID 2504 wrote to memory of 2404	2504	307644b1154391b4f425896da8efd9480fb3dda0f56c633b08c32058f5b469fa.exe	32
PID 2504 wrote to memory of 2428	2504	307644b1154391b4f425896da8efd9480fb3dda0f56c633b08c32058f5b469fa.exe	34
PID 2504 wrote to memory of 2428	2504	307644b1154391b4f425896da8efd9480fb3dda0f56c633b08c32058f5b469fa.exe	34
PID 2504 wrote to memory of 2428	2504	307644b1154391b4f425896da8efd9480fb3dda0f56c633b08c32058f5b469fa.exe	34
PID 2504 wrote to memory of 2428	2504	307644b1154391b4f425896da8efd9480fb3dda0f56c633b08c32058f5b469fa.exe	34
PID 2504 wrote to memory of 2832	2504	307644b1154391b4f425896da8efd9480fb3dda0f56c633b08c32058f5b469fa.exe	36
PID 2504 wrote to memory of 2832	2504	307644b1154391b4f425896da8efd9480fb3dda0f56c633b08c32058f5b469fa.exe	36
PID 2504 wrote to memory of 2832	2504	307644b1154391b4f425896da8efd9480fb3dda0f56c633b08c32058f5b469fa.exe	36
PID 2504 wrote to memory of 2832	2504	307644b1154391b4f425896da8efd9480fb3dda0f56c633b08c32058f5b469fa.exe	36
PID 2504 wrote to memory of 2752	2504	307644b1154391b4f425896da8efd9480fb3dda0f56c633b08c32058f5b469fa.exe	38
PID 2504 wrote to memory of 2752	2504	307644b1154391b4f425896da8efd9480fb3dda0f56c633b08c32058f5b469fa.exe	38
PID 2504 wrote to memory of 2752	2504	307644b1154391b4f425896da8efd9480fb3dda0f56c633b08c32058f5b469fa.exe	38
PID 2504 wrote to memory of 2752	2504	307644b1154391b4f425896da8efd9480fb3dda0f56c633b08c32058f5b469fa.exe	38
PID 2504 wrote to memory of 2764	2504	307644b1154391b4f425896da8efd9480fb3dda0f56c633b08c32058f5b469fa.exe	41
PID 2504 wrote to memory of 2764	2504	307644b1154391b4f425896da8efd9480fb3dda0f56c633b08c32058f5b469fa.exe	41
PID 2504 wrote to memory of 2764	2504	307644b1154391b4f425896da8efd9480fb3dda0f56c633b08c32058f5b469fa.exe	41
PID 2504 wrote to memory of 2764	2504	307644b1154391b4f425896da8efd9480fb3dda0f56c633b08c32058f5b469fa.exe	41
PID 2300 wrote to memory of 1988	2300	vtdbbraq.exe	43
PID 2300 wrote to memory of 1988	2300	vtdbbraq.exe	43
PID 2300 wrote to memory of 1988	2300	vtdbbraq.exe	43
PID 2300 wrote to memory of 1988	2300	vtdbbraq.exe	43
PID 2300 wrote to memory of 1988	2300	vtdbbraq.exe	43
PID 2300 wrote to memory of 1988	2300	vtdbbraq.exe	43

C:\Users\Admin\AppData\Local\Temp\307644b1154391b4f425896da8efd9480fb3dda0f56c633b08c32058f5b469fa.exe
"C:\Users\Admin\AppData\Local\Temp\307644b1154391b4f425896da8efd9480fb3dda0f56c633b08c32058f5b469fa.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2504
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\espczwyd\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:1788
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\vtdbbraq.exe" C:\Windows\SysWOW64\espczwyd\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2404
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create espczwyd binPath= "C:\Windows\SysWOW64\espczwyd\vtdbbraq.exe /d\"C:\Users\Admin\AppData\Local\Temp\307644b1154391b4f425896da8efd9480fb3dda0f56c633b08c32058f5b469fa.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2428
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description espczwyd "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2832
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start espczwyd
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2752
- 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:2764

C:\Windows\SysWOW64\espczwyd\vtdbbraq.exe
C:\Windows\SysWOW64\espczwyd\vtdbbraq.exe /d"C:\Users\Admin\AppData\Local\Temp\307644b1154391b4f425896da8efd9480fb3dda0f56c633b08c32058f5b469fa.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2300
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Windows security bypass
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:1988

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

Disable or Modify Tools

T1562.001

Modify Registry

T1112

Credential Access

Discovery

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

C:\Users\Admin\AppData\Local\Temp\vtdbbraq.exe

Filesize
10.5MB

MD5
01d751f28482fda02953fd439fd2e899

SHA1
9183533858a8deca4b426e23d1bc5738aa1e3786

SHA256
85a095fce8af3e3c75245d9837614df60699b20c1cfc5a8960f9782bbaf18bcd

SHA512
208fb860efc74328a862baba1ff5f5ab662620d2efd60718d2f52c4bebf928b42eec5e5185d5c44a1dfc3bf9f78d9e8d33561c1d1cfdd19ac28ab1a6f9821c51

Download Submit
memory/1988-14-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/1988-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/1988-11-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/1988-16-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/1988-17-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/1988-18-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2300-15-0x0000000000400000-0x00000000004AD000-memory.dmp

Filesize
692KB

Download
memory/2504-4-0x0000000000400000-0x00000000004AD000-memory.dmp

Filesize
692KB

Download
memory/2504-2-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2504-10-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2504-9-0x0000000000400000-0x00000000004AD000-memory.dmp

Filesize
692KB

Download
memory/2504-1-0x0000000000540000-0x0000000000640000-memory.dmp

Filesize
1024KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads