tofsee | 4b2eae5f660d21810fb7d69e18c361751faa4bc3518d6803c64984cdd6cac5a8

Analysis

max time kernel
119s
max time network
121s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
24-11-2024 04:39

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General

Target

4b2eae5f660d21810fb7d69e18c361751faa4bc3518d6803c64984cdd6cac5a8.exe
Size

333KB
MD5

76a120236d4a3c44182016bd9a05417c
SHA1

c548777e9a3fb26597525edee630c79231357a5b
SHA256

4b2eae5f660d21810fb7d69e18c361751faa4bc3518d6803c64984cdd6cac5a8
SHA512

e773fa8ed3eeb3aae4ce818553f5f06a9f3c8f7e7b89135c10743bffb989b16862d0e29d855194203aef3a1fe19420308bddad92922b3b1bd1a6357e09ffe246
SSDEEP

6144:xOYmVlRyNQpj0ViCx2xKxc9Sh/KXl/wLWlWC8RzZap6j:xW7Rw2j0VmKqgJKXlwGeVZL

Score

10^/10

tofsee discovery evasion execution persistence privilege_escalation trojan

Malware Config

Extracted

Family

tofsee

quadoil.ru

lakeflex.ru

Signatures

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

Windows security bypass 2 TTPs 1 IoCs

evasion trojan

Disable or Modify Tools

T1562.001

Modify Registry

T1112

Processes:

svchost.exe

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths\C:\Windows\SysWOW64\bxmcfefq = "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

Processes:

netsh.exe

pid	Process
2564	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\bxmcfefq\ImagePath = "C:\\Windows\\SysWOW64\\bxmcfefq\\qjxjbvxk.exe"	svchost.exe

Deletes itself 1 IoCs

Processes:

svchost.exe

pid	Process
3008	svchost.exe

Executes dropped EXE 1 IoCs

Processes:

qjxjbvxk.exe

pid	Process
2792	qjxjbvxk.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

qjxjbvxk.exe

description	pid	Process	procid_target
PID 2792 set thread context of 3008	2792	qjxjbvxk.exe	43

Launches sc.exe 3 IoCs

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

Processes:

sc.exesc.exesc.exe

pid	Process
2720	sc.exe
2820	sc.exe
2580	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:

qjxjbvxk.execmd.exesc.exesc.exenetsh.exesvchost.exe4b2eae5f660d21810fb7d69e18c361751faa4bc3518d6803c64984cdd6cac5a8.execmd.exesc.exe

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	qjxjbvxk.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	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	4b2eae5f660d21810fb7d69e18c361751faa4bc3518d6803c64984cdd6cac5a8.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe

Suspicious use of WriteProcessMemory 30 IoCs

Processes:

4b2eae5f660d21810fb7d69e18c361751faa4bc3518d6803c64984cdd6cac5a8.exeqjxjbvxk.exe

description	pid	Process	procid_target
PID 2364 wrote to memory of 2756	2364	4b2eae5f660d21810fb7d69e18c361751faa4bc3518d6803c64984cdd6cac5a8.exe	30
PID 2364 wrote to memory of 2756	2364	4b2eae5f660d21810fb7d69e18c361751faa4bc3518d6803c64984cdd6cac5a8.exe	30
PID 2364 wrote to memory of 2756	2364	4b2eae5f660d21810fb7d69e18c361751faa4bc3518d6803c64984cdd6cac5a8.exe	30
PID 2364 wrote to memory of 2756	2364	4b2eae5f660d21810fb7d69e18c361751faa4bc3518d6803c64984cdd6cac5a8.exe	30
PID 2364 wrote to memory of 2916	2364	4b2eae5f660d21810fb7d69e18c361751faa4bc3518d6803c64984cdd6cac5a8.exe	32
PID 2364 wrote to memory of 2916	2364	4b2eae5f660d21810fb7d69e18c361751faa4bc3518d6803c64984cdd6cac5a8.exe	32
PID 2364 wrote to memory of 2916	2364	4b2eae5f660d21810fb7d69e18c361751faa4bc3518d6803c64984cdd6cac5a8.exe	32
PID 2364 wrote to memory of 2916	2364	4b2eae5f660d21810fb7d69e18c361751faa4bc3518d6803c64984cdd6cac5a8.exe	32
PID 2364 wrote to memory of 2820	2364	4b2eae5f660d21810fb7d69e18c361751faa4bc3518d6803c64984cdd6cac5a8.exe	34
PID 2364 wrote to memory of 2820	2364	4b2eae5f660d21810fb7d69e18c361751faa4bc3518d6803c64984cdd6cac5a8.exe	34
PID 2364 wrote to memory of 2820	2364	4b2eae5f660d21810fb7d69e18c361751faa4bc3518d6803c64984cdd6cac5a8.exe	34
PID 2364 wrote to memory of 2820	2364	4b2eae5f660d21810fb7d69e18c361751faa4bc3518d6803c64984cdd6cac5a8.exe	34
PID 2364 wrote to memory of 2580	2364	4b2eae5f660d21810fb7d69e18c361751faa4bc3518d6803c64984cdd6cac5a8.exe	36
PID 2364 wrote to memory of 2580	2364	4b2eae5f660d21810fb7d69e18c361751faa4bc3518d6803c64984cdd6cac5a8.exe	36
PID 2364 wrote to memory of 2580	2364	4b2eae5f660d21810fb7d69e18c361751faa4bc3518d6803c64984cdd6cac5a8.exe	36
PID 2364 wrote to memory of 2580	2364	4b2eae5f660d21810fb7d69e18c361751faa4bc3518d6803c64984cdd6cac5a8.exe	36
PID 2364 wrote to memory of 2720	2364	4b2eae5f660d21810fb7d69e18c361751faa4bc3518d6803c64984cdd6cac5a8.exe	38
PID 2364 wrote to memory of 2720	2364	4b2eae5f660d21810fb7d69e18c361751faa4bc3518d6803c64984cdd6cac5a8.exe	38
PID 2364 wrote to memory of 2720	2364	4b2eae5f660d21810fb7d69e18c361751faa4bc3518d6803c64984cdd6cac5a8.exe	38
PID 2364 wrote to memory of 2720	2364	4b2eae5f660d21810fb7d69e18c361751faa4bc3518d6803c64984cdd6cac5a8.exe	38
PID 2364 wrote to memory of 2564	2364	4b2eae5f660d21810fb7d69e18c361751faa4bc3518d6803c64984cdd6cac5a8.exe	41
PID 2364 wrote to memory of 2564	2364	4b2eae5f660d21810fb7d69e18c361751faa4bc3518d6803c64984cdd6cac5a8.exe	41
PID 2364 wrote to memory of 2564	2364	4b2eae5f660d21810fb7d69e18c361751faa4bc3518d6803c64984cdd6cac5a8.exe	41
PID 2364 wrote to memory of 2564	2364	4b2eae5f660d21810fb7d69e18c361751faa4bc3518d6803c64984cdd6cac5a8.exe	41
PID 2792 wrote to memory of 3008	2792	qjxjbvxk.exe	43
PID 2792 wrote to memory of 3008	2792	qjxjbvxk.exe	43
PID 2792 wrote to memory of 3008	2792	qjxjbvxk.exe	43
PID 2792 wrote to memory of 3008	2792	qjxjbvxk.exe	43
PID 2792 wrote to memory of 3008	2792	qjxjbvxk.exe	43
PID 2792 wrote to memory of 3008	2792	qjxjbvxk.exe	43

C:\Users\Admin\AppData\Local\Temp\4b2eae5f660d21810fb7d69e18c361751faa4bc3518d6803c64984cdd6cac5a8.exe
"C:\Users\Admin\AppData\Local\Temp\4b2eae5f660d21810fb7d69e18c361751faa4bc3518d6803c64984cdd6cac5a8.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2364
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\bxmcfefq\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2756
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\qjxjbvxk.exe" C:\Windows\SysWOW64\bxmcfefq\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2916
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create bxmcfefq binPath= "C:\Windows\SysWOW64\bxmcfefq\qjxjbvxk.exe /d\"C:\Users\Admin\AppData\Local\Temp\4b2eae5f660d21810fb7d69e18c361751faa4bc3518d6803c64984cdd6cac5a8.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2820
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description bxmcfefq "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2580
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start bxmcfefq
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2720
- 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:2564

C:\Windows\SysWOW64\bxmcfefq\qjxjbvxk.exe
C:\Windows\SysWOW64\bxmcfefq\qjxjbvxk.exe /d"C:\Users\Admin\AppData\Local\Temp\4b2eae5f660d21810fb7d69e18c361751faa4bc3518d6803c64984cdd6cac5a8.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2792
- 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:3008

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

Replay Monitor

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Downloads

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

Filesize
12.8MB

MD5
4c4eabfe5327eac31768753aff3afb7d

SHA1
9f9e537b02b479399a351f2affee880dca281933

SHA256
c16fdd7ea2fc9f561bb9094353e273c247050e100081a15ddd62ebed665b5696

SHA512
4bfebbaf24bd514523d1c99c10d51edc9aa4a9e4b90e83680e02c79a4eddeb91657a53f1662fd4a0e0eb9959e022c5a95cfe0d42d55376591d77bca6adbf5ba3

Download Submit
memory/2364-8-0x0000000000400000-0x0000000000882000-memory.dmp

Filesize
4.5MB

Download
memory/2364-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2364-2-0x0000000000020000-0x0000000000033000-memory.dmp

Filesize
76KB

Download
memory/2364-10-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2364-9-0x0000000000020000-0x0000000000033000-memory.dmp

Filesize
76KB

Download
memory/2364-1-0x0000000000930000-0x0000000000A30000-memory.dmp

Filesize
1024KB

Download
memory/2792-17-0x0000000000400000-0x0000000000882000-memory.dmp

Filesize
4.5MB

Download
memory/3008-16-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/3008-14-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/3008-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/3008-11-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/3008-18-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download