tofsee | 337df24a0a893ff8c2930d5ccf98713a8fc0c28e4563115b8cf7abf875be3403

Analysis

max time kernel
150s
max time network
156s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
06-09-2024 23:17

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General

Target

6ee402c592b8d9a8f65b1e9871916bf8bf08118253758af2bd8d02b053b3af20.exe
Size

12.1MB
MD5

873d61d252596ef91e699d9c5a641119
SHA1

fac32b3b99469b90641d7916d7681fef16d392c4
SHA256

6ee402c592b8d9a8f65b1e9871916bf8bf08118253758af2bd8d02b053b3af20
SHA512

66d54af51f53b35f5a6f2527da45a5a1e59b22768f3aed12631f23c61293a410c9cf08f8a5c848c9884ea418935584e47a37574659c71a4ec6441afed52b7325
SSDEEP

6144:Y1eOABi9y39q2xwt8hW5B3rmKYXIOk43AnscO:Y1PEik39bwtMGd6KK33Y

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\bvpjkoio = "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
2792	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\bvpjkoio\ImagePath = "C:\\Windows\\SysWOW64\\bvpjkoio\\dbqcwsdt.exe"	svchost.exe

Deletes itself 1 IoCs

pid	Process
2840	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2716	dbqcwsdt.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2716 set thread context of 2840	2716	dbqcwsdt.exe	44

Launches sc.exe 3 IoCs

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

pid	Process
2392	sc.exe
2340	sc.exe
580	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	dbqcwsdt.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	6ee402c592b8d9a8f65b1e9871916bf8bf08118253758af2bd8d02b053b3af20.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	cmd.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 2084 wrote to memory of 2016	2084	6ee402c592b8d9a8f65b1e9871916bf8bf08118253758af2bd8d02b053b3af20.exe	30
PID 2084 wrote to memory of 2016	2084	6ee402c592b8d9a8f65b1e9871916bf8bf08118253758af2bd8d02b053b3af20.exe	30
PID 2084 wrote to memory of 2016	2084	6ee402c592b8d9a8f65b1e9871916bf8bf08118253758af2bd8d02b053b3af20.exe	30
PID 2084 wrote to memory of 2016	2084	6ee402c592b8d9a8f65b1e9871916bf8bf08118253758af2bd8d02b053b3af20.exe	30
PID 2084 wrote to memory of 2528	2084	6ee402c592b8d9a8f65b1e9871916bf8bf08118253758af2bd8d02b053b3af20.exe	32
PID 2084 wrote to memory of 2528	2084	6ee402c592b8d9a8f65b1e9871916bf8bf08118253758af2bd8d02b053b3af20.exe	32
PID 2084 wrote to memory of 2528	2084	6ee402c592b8d9a8f65b1e9871916bf8bf08118253758af2bd8d02b053b3af20.exe	32
PID 2084 wrote to memory of 2528	2084	6ee402c592b8d9a8f65b1e9871916bf8bf08118253758af2bd8d02b053b3af20.exe	32
PID 2084 wrote to memory of 2392	2084	6ee402c592b8d9a8f65b1e9871916bf8bf08118253758af2bd8d02b053b3af20.exe	34
PID 2084 wrote to memory of 2392	2084	6ee402c592b8d9a8f65b1e9871916bf8bf08118253758af2bd8d02b053b3af20.exe	34
PID 2084 wrote to memory of 2392	2084	6ee402c592b8d9a8f65b1e9871916bf8bf08118253758af2bd8d02b053b3af20.exe	34
PID 2084 wrote to memory of 2392	2084	6ee402c592b8d9a8f65b1e9871916bf8bf08118253758af2bd8d02b053b3af20.exe	34
PID 2084 wrote to memory of 2340	2084	6ee402c592b8d9a8f65b1e9871916bf8bf08118253758af2bd8d02b053b3af20.exe	36
PID 2084 wrote to memory of 2340	2084	6ee402c592b8d9a8f65b1e9871916bf8bf08118253758af2bd8d02b053b3af20.exe	36
PID 2084 wrote to memory of 2340	2084	6ee402c592b8d9a8f65b1e9871916bf8bf08118253758af2bd8d02b053b3af20.exe	36
PID 2084 wrote to memory of 2340	2084	6ee402c592b8d9a8f65b1e9871916bf8bf08118253758af2bd8d02b053b3af20.exe	36
PID 2084 wrote to memory of 580	2084	6ee402c592b8d9a8f65b1e9871916bf8bf08118253758af2bd8d02b053b3af20.exe	38
PID 2084 wrote to memory of 580	2084	6ee402c592b8d9a8f65b1e9871916bf8bf08118253758af2bd8d02b053b3af20.exe	38
PID 2084 wrote to memory of 580	2084	6ee402c592b8d9a8f65b1e9871916bf8bf08118253758af2bd8d02b053b3af20.exe	38
PID 2084 wrote to memory of 580	2084	6ee402c592b8d9a8f65b1e9871916bf8bf08118253758af2bd8d02b053b3af20.exe	38
PID 2084 wrote to memory of 2792	2084	6ee402c592b8d9a8f65b1e9871916bf8bf08118253758af2bd8d02b053b3af20.exe	41
PID 2084 wrote to memory of 2792	2084	6ee402c592b8d9a8f65b1e9871916bf8bf08118253758af2bd8d02b053b3af20.exe	41
PID 2084 wrote to memory of 2792	2084	6ee402c592b8d9a8f65b1e9871916bf8bf08118253758af2bd8d02b053b3af20.exe	41
PID 2084 wrote to memory of 2792	2084	6ee402c592b8d9a8f65b1e9871916bf8bf08118253758af2bd8d02b053b3af20.exe	41
PID 2716 wrote to memory of 2840	2716	dbqcwsdt.exe	44
PID 2716 wrote to memory of 2840	2716	dbqcwsdt.exe	44
PID 2716 wrote to memory of 2840	2716	dbqcwsdt.exe	44
PID 2716 wrote to memory of 2840	2716	dbqcwsdt.exe	44
PID 2716 wrote to memory of 2840	2716	dbqcwsdt.exe	44
PID 2716 wrote to memory of 2840	2716	dbqcwsdt.exe	44

C:\Users\Admin\AppData\Local\Temp\6ee402c592b8d9a8f65b1e9871916bf8bf08118253758af2bd8d02b053b3af20.exe
"C:\Users\Admin\AppData\Local\Temp\6ee402c592b8d9a8f65b1e9871916bf8bf08118253758af2bd8d02b053b3af20.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2084
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\bvpjkoio\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2016
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\dbqcwsdt.exe" C:\Windows\SysWOW64\bvpjkoio\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2528
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create bvpjkoio binPath= "C:\Windows\SysWOW64\bvpjkoio\dbqcwsdt.exe /d\"C:\Users\Admin\AppData\Local\Temp\6ee402c592b8d9a8f65b1e9871916bf8bf08118253758af2bd8d02b053b3af20.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2392
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description bvpjkoio "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2340
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start bvpjkoio
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:580
- 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:2792

C:\Windows\SysWOW64\bvpjkoio\dbqcwsdt.exe
C:\Windows\SysWOW64\bvpjkoio\dbqcwsdt.exe /d"C:\Users\Admin\AppData\Local\Temp\6ee402c592b8d9a8f65b1e9871916bf8bf08118253758af2bd8d02b053b3af20.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2716
- 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:2840

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\dbqcwsdt.exe

Filesize
13.2MB

MD5
ffe8b02db9270d2be7551488a5d34523

SHA1
2f50b844a3a24b3cda7815544281c372fe2cd839

SHA256
9d6e2fdb8e8dbde6735a7344a72fdb136615979cc4807f3c20f0473e612fe23e

SHA512
87ca673e1cb7767dcdbb0755ad1faec38d1160495109be9b45e2dc56ae1d4c4150ac0135838332f453d0b76dbc8551663f1c44a762db72ea16b2aff7af0705aa

Download Submit
memory/2084-9-0x0000000000220000-0x0000000000233000-memory.dmp

Filesize
76KB

Download
memory/2084-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2084-2-0x0000000000220000-0x0000000000233000-memory.dmp

Filesize
76KB

Download
memory/2084-11-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2084-10-0x0000000002FF0000-0x00000000030F0000-memory.dmp

Filesize
1024KB

Download
memory/2084-1-0x0000000002FF0000-0x00000000030F0000-memory.dmp

Filesize
1024KB

Download
memory/2084-8-0x0000000000400000-0x0000000002B90000-memory.dmp

Filesize
39.6MB

Download
memory/2716-16-0x0000000000400000-0x0000000002B90000-memory.dmp

Filesize
39.6MB

Download
memory/2840-15-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download
memory/2840-18-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download
memory/2840-14-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2840-12-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download
memory/2840-19-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads