tofsee | 6631a4c0948b4608115ad6724b8fe5ae5c71ac5fbb6c03e140b653d6dd7cc3d0

Analysis

max time kernel
145s
max time network
145s
platform
windows7_x64
resource
win7-20231129-en
resource tags

arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system
submitted
19-12-2023 11:15

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General

Target

11c85c397fc61144cff2e684f328497b.exe
Size

11.6MB
MD5

11c85c397fc61144cff2e684f328497b
SHA1

ebe28815654d4d7004b8dca046428cb3980c95c4
SHA256

6631a4c0948b4608115ad6724b8fe5ae5c71ac5fbb6c03e140b653d6dd7cc3d0
SHA512

2840743df73433e18bef638f753c142c030dda5b5a4bde3cddacd69ab09b99396f24ad479e40ed7f91994acc381cfb479065ff69a20c4fea319f23f93ac19c0b
SSDEEP

196608:NtPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPP3:N

Score

10^/10

tofsee evasion persistence 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\nyukoaoc = "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
2652	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\nyukoaoc\ImagePath = "C:\\Windows\\SysWOW64\\nyukoaoc\\sezwdccq.exe"	svchost.exe

Deletes itself 1 IoCs

pid	Process
2704	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2632	sezwdccq.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2632 set thread context of 2704	2632	sezwdccq.exe	41

Launches sc.exe 3 IoCs

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

pid	Process
1696	sc.exe
2720	sc.exe
2572	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 3024 wrote to memory of 1064	3024	11c85c397fc61144cff2e684f328497b.exe	28
PID 3024 wrote to memory of 1064	3024	11c85c397fc61144cff2e684f328497b.exe	28
PID 3024 wrote to memory of 1064	3024	11c85c397fc61144cff2e684f328497b.exe	28
PID 3024 wrote to memory of 1064	3024	11c85c397fc61144cff2e684f328497b.exe	28
PID 3024 wrote to memory of 1892	3024	11c85c397fc61144cff2e684f328497b.exe	30
PID 3024 wrote to memory of 1892	3024	11c85c397fc61144cff2e684f328497b.exe	30
PID 3024 wrote to memory of 1892	3024	11c85c397fc61144cff2e684f328497b.exe	30
PID 3024 wrote to memory of 1892	3024	11c85c397fc61144cff2e684f328497b.exe	30
PID 3024 wrote to memory of 1696	3024	11c85c397fc61144cff2e684f328497b.exe	32
PID 3024 wrote to memory of 1696	3024	11c85c397fc61144cff2e684f328497b.exe	32
PID 3024 wrote to memory of 1696	3024	11c85c397fc61144cff2e684f328497b.exe	32
PID 3024 wrote to memory of 1696	3024	11c85c397fc61144cff2e684f328497b.exe	32
PID 3024 wrote to memory of 2720	3024	11c85c397fc61144cff2e684f328497b.exe	35
PID 3024 wrote to memory of 2720	3024	11c85c397fc61144cff2e684f328497b.exe	35
PID 3024 wrote to memory of 2720	3024	11c85c397fc61144cff2e684f328497b.exe	35
PID 3024 wrote to memory of 2720	3024	11c85c397fc61144cff2e684f328497b.exe	35
PID 3024 wrote to memory of 2572	3024	11c85c397fc61144cff2e684f328497b.exe	36
PID 3024 wrote to memory of 2572	3024	11c85c397fc61144cff2e684f328497b.exe	36
PID 3024 wrote to memory of 2572	3024	11c85c397fc61144cff2e684f328497b.exe	36
PID 3024 wrote to memory of 2572	3024	11c85c397fc61144cff2e684f328497b.exe	36
PID 3024 wrote to memory of 2652	3024	11c85c397fc61144cff2e684f328497b.exe	39
PID 3024 wrote to memory of 2652	3024	11c85c397fc61144cff2e684f328497b.exe	39
PID 3024 wrote to memory of 2652	3024	11c85c397fc61144cff2e684f328497b.exe	39
PID 3024 wrote to memory of 2652	3024	11c85c397fc61144cff2e684f328497b.exe	39
PID 2632 wrote to memory of 2704	2632	sezwdccq.exe	41
PID 2632 wrote to memory of 2704	2632	sezwdccq.exe	41
PID 2632 wrote to memory of 2704	2632	sezwdccq.exe	41
PID 2632 wrote to memory of 2704	2632	sezwdccq.exe	41
PID 2632 wrote to memory of 2704	2632	sezwdccq.exe	41
PID 2632 wrote to memory of 2704	2632	sezwdccq.exe	41

C:\Users\Admin\AppData\Local\Temp\11c85c397fc61144cff2e684f328497b.exe
"C:\Users\Admin\AppData\Local\Temp\11c85c397fc61144cff2e684f328497b.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:3024
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\nyukoaoc\
  2⤵
  PID:1064
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\sezwdccq.exe" C:\Windows\SysWOW64\nyukoaoc\
  2⤵
  PID:1892
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create nyukoaoc binPath= "C:\Windows\SysWOW64\nyukoaoc\sezwdccq.exe /d\"C:\Users\Admin\AppData\Local\Temp\11c85c397fc61144cff2e684f328497b.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:1696
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description nyukoaoc "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:2720
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start nyukoaoc
  2⤵
  - Launches sc.exe
  PID:2572
- 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:2652

C:\Windows\SysWOW64\nyukoaoc\sezwdccq.exe
C:\Windows\SysWOW64\nyukoaoc\sezwdccq.exe /d"C:\Users\Admin\AppData\Local\Temp\11c85c397fc61144cff2e684f328497b.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2632
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Windows security bypass
  - Sets service image path in registry
  - Deletes itself
  PID:2704

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\sezwdccq.exe

Filesize
14.3MB

MD5
11cbe0c4ddd87dc6b88c3e4cabfeb51f

SHA1
43d9c5304f1b880faff156c640a85452e7a50505

SHA256
ccce4d243971b2f4421ce21285c634f0ec010ac71c9df0044babac25683689ff

SHA512
e64bd02b886ec4231a01d2317af25f07987828a488c96c5f1ca054d9d3cfe63d56769b5f27189e852fccdcd6411e326bf999d2a53e550dc1d28ed001e682bc10

Download Submit
memory/2632-10-0x0000000000A30000-0x0000000000B30000-memory.dmp

Filesize
1024KB

Download
memory/2632-16-0x0000000000400000-0x0000000000871000-memory.dmp

Filesize
4.4MB

Download
memory/2632-12-0x0000000000400000-0x0000000000871000-memory.dmp

Filesize
4.4MB

Download
memory/2704-20-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2704-11-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2704-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2704-15-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2704-19-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2704-21-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2704-22-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/3024-9-0x00000000001B0000-0x00000000001C3000-memory.dmp

Filesize
76KB

Download
memory/3024-8-0x0000000000400000-0x0000000000871000-memory.dmp

Filesize
4.4MB

Download
memory/3024-4-0x0000000000400000-0x0000000000871000-memory.dmp

Filesize
4.4MB

Download
memory/3024-2-0x00000000001B0000-0x00000000001C3000-memory.dmp

Filesize
76KB

Download
memory/3024-1-0x00000000002D0000-0x00000000003D0000-memory.dmp

Filesize
1024KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads