tofsee | 3d2c58bc8baccf681fbe8983bb05ca2f015f0f846855bbe3d7365156bb93c2a0

Analysis

max time kernel
143s
max time network
120s
platform
windows7_x64
resource
win7-20231129-en
resource tags

arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system
submitted
24/12/2023, 20:08

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General

Target

0fdc50304eba32631b1dda3d0979ac57.exe
Size

14.1MB
MD5

0fdc50304eba32631b1dda3d0979ac57
SHA1

a81852508606e630ba46cdd71df0ab692f127dd7
SHA256

3d2c58bc8baccf681fbe8983bb05ca2f015f0f846855bbe3d7365156bb93c2a0
SHA512

f9a961051895f3669b5d2f4ba0c3e4fc3b48c4571fef2db23e5d80515316f03b1a76a3fa5d697ac1f137c15e4697d1bf22010333d7af45916fa9033019badc27
SSDEEP

49152:/3Skkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk3:/3

Score

10^/10

tofsee evasion persistence trojan

Malware Config

Extracted

Family

tofsee

43.231.4.6

lazystax.ru

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\kqatrxvd = "0"	svchost.exe

Creates new service(s) 1 TTPs
persistence

Windows Service
T1543.003

Modifies Windows Firewall 1 TTPs 1 IoCs

evasion

Windows Service

T1543.003

pid	Process
2596	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\kqatrxvd\ImagePath = "C:\\Windows\\SysWOW64\\kqatrxvd\\vspnzkzn.exe"	svchost.exe

Deletes itself 1 IoCs

pid	Process
2600	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2612	vspnzkzn.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2612 set thread context of 2600	2612	vspnzkzn.exe	41

Launches sc.exe 3 IoCs

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

pid	Process
3008	sc.exe
2592	sc.exe
2728	sc.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 2196 wrote to memory of 2644	2196	0fdc50304eba32631b1dda3d0979ac57.exe	28
PID 2196 wrote to memory of 2644	2196	0fdc50304eba32631b1dda3d0979ac57.exe	28
PID 2196 wrote to memory of 2644	2196	0fdc50304eba32631b1dda3d0979ac57.exe	28
PID 2196 wrote to memory of 2644	2196	0fdc50304eba32631b1dda3d0979ac57.exe	28
PID 2196 wrote to memory of 1748	2196	0fdc50304eba32631b1dda3d0979ac57.exe	30
PID 2196 wrote to memory of 1748	2196	0fdc50304eba32631b1dda3d0979ac57.exe	30
PID 2196 wrote to memory of 1748	2196	0fdc50304eba32631b1dda3d0979ac57.exe	30
PID 2196 wrote to memory of 1748	2196	0fdc50304eba32631b1dda3d0979ac57.exe	30
PID 2196 wrote to memory of 3008	2196	0fdc50304eba32631b1dda3d0979ac57.exe	32
PID 2196 wrote to memory of 3008	2196	0fdc50304eba32631b1dda3d0979ac57.exe	32
PID 2196 wrote to memory of 3008	2196	0fdc50304eba32631b1dda3d0979ac57.exe	32
PID 2196 wrote to memory of 3008	2196	0fdc50304eba32631b1dda3d0979ac57.exe	32
PID 2196 wrote to memory of 2592	2196	0fdc50304eba32631b1dda3d0979ac57.exe	34
PID 2196 wrote to memory of 2592	2196	0fdc50304eba32631b1dda3d0979ac57.exe	34
PID 2196 wrote to memory of 2592	2196	0fdc50304eba32631b1dda3d0979ac57.exe	34
PID 2196 wrote to memory of 2592	2196	0fdc50304eba32631b1dda3d0979ac57.exe	34
PID 2196 wrote to memory of 2728	2196	0fdc50304eba32631b1dda3d0979ac57.exe	37
PID 2196 wrote to memory of 2728	2196	0fdc50304eba32631b1dda3d0979ac57.exe	37
PID 2196 wrote to memory of 2728	2196	0fdc50304eba32631b1dda3d0979ac57.exe	37
PID 2196 wrote to memory of 2728	2196	0fdc50304eba32631b1dda3d0979ac57.exe	37
PID 2196 wrote to memory of 2596	2196	0fdc50304eba32631b1dda3d0979ac57.exe	40
PID 2196 wrote to memory of 2596	2196	0fdc50304eba32631b1dda3d0979ac57.exe	40
PID 2196 wrote to memory of 2596	2196	0fdc50304eba32631b1dda3d0979ac57.exe	40
PID 2196 wrote to memory of 2596	2196	0fdc50304eba32631b1dda3d0979ac57.exe	40
PID 2612 wrote to memory of 2600	2612	vspnzkzn.exe	41
PID 2612 wrote to memory of 2600	2612	vspnzkzn.exe	41
PID 2612 wrote to memory of 2600	2612	vspnzkzn.exe	41
PID 2612 wrote to memory of 2600	2612	vspnzkzn.exe	41
PID 2612 wrote to memory of 2600	2612	vspnzkzn.exe	41
PID 2612 wrote to memory of 2600	2612	vspnzkzn.exe	41

C:\Users\Admin\AppData\Local\Temp\0fdc50304eba32631b1dda3d0979ac57.exe
"C:\Users\Admin\AppData\Local\Temp\0fdc50304eba32631b1dda3d0979ac57.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:2196
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\kqatrxvd\
  2⤵
  PID:2644
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\vspnzkzn.exe" C:\Windows\SysWOW64\kqatrxvd\
  2⤵
  PID:1748
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create kqatrxvd binPath= "C:\Windows\SysWOW64\kqatrxvd\vspnzkzn.exe /d\"C:\Users\Admin\AppData\Local\Temp\0fdc50304eba32631b1dda3d0979ac57.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:3008
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description kqatrxvd "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:2592
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start kqatrxvd
  2⤵
  - Launches sc.exe
  PID:2728
- 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
  PID:2596

C:\Windows\SysWOW64\kqatrxvd\vspnzkzn.exe
C:\Windows\SysWOW64\kqatrxvd\vspnzkzn.exe /d"C:\Users\Admin\AppData\Local\Temp\0fdc50304eba32631b1dda3d0979ac57.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2612
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Windows security bypass
  - Sets service image path in registry
  - Deletes itself
  PID:2600

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Create or Modify System Process

T1543

Windows Service

T1543.003

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

Defense Evasion

Impair Defenses

T1562

Disable or Modify Tools

T1562.001

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

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

Filesize
1024KB

MD5
05af0a6687ec7cbd3967fc5dcf03c68f

SHA1
45df997a838aa7ed76804406302f6c7fe5a769c2

SHA256
747026b3b972984fd60f33c7a2816325847c9e1cbf6eb393769f221a45e6eb88

SHA512
265ba7887e4cb4445c9f0968d18f3d960594e164d303f5b81dbc699ec1e0bbbbc7b22d15b78b471af9578b3316c6d88d548e5d4e66506a41b6b00d7127141e57

Download Submit
C:\Windows\SysWOW64\kqatrxvd\vspnzkzn.exe

Filesize
338KB

MD5
1acd9ca298dcb6eca1a16e5882ca9e29

SHA1
d61c0efad3d040b1d546674c0c4c0424fb850b45

SHA256
962c7adda741ad5ddccf9399f4eba88f16015b2a021a24e65ef347ba348fbcea

SHA512
cf83343a9b9ff3dae8e3230406dd0919c499d99c9a06d47dc1b91ab27da0ef5aa1edfd9428e62526275f5bd5e65533e4a94dd61e5b528905784570d9fe4caa43

Download Submit
memory/2196-1-0x0000000000CA0000-0x0000000000DA0000-memory.dmp

Filesize
1024KB

Download
memory/2196-2-0x00000000002B0000-0x00000000002C3000-memory.dmp

Filesize
76KB

Download
memory/2196-4-0x0000000000400000-0x0000000000C14000-memory.dmp

Filesize
8.1MB

Download
memory/2196-7-0x0000000000400000-0x0000000000C14000-memory.dmp

Filesize
8.1MB

Download
memory/2196-8-0x00000000002B0000-0x00000000002C3000-memory.dmp

Filesize
76KB

Download
memory/2600-12-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2600-11-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2600-15-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2600-20-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2600-21-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2600-19-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2600-22-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2612-13-0x0000000000400000-0x0000000000C14000-memory.dmp

Filesize
8.1MB

Download
memory/2612-17-0x0000000000400000-0x0000000000C14000-memory.dmp

Filesize
8.1MB

Download
memory/2612-10-0x0000000001060000-0x0000000001160000-memory.dmp

Filesize
1024KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads