tofsee | ede12aae367dc234d5043dfb40537182d2fd9874c7165b8c9edca4a210ad14c2

Analysis

max time kernel
141s
max time network
119s
platform
windows7_x64
resource
win7-20231129-en
resource tags

arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system
submitted
25/12/2023, 20:57

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General

Target

3c7b639b7991255518ac3ff7a9cd7926.exe
Size

13.0MB
MD5

3c7b639b7991255518ac3ff7a9cd7926
SHA1

78df0e627aef3c579512f8a2f80868144d363c0a
SHA256

ede12aae367dc234d5043dfb40537182d2fd9874c7165b8c9edca4a210ad14c2
SHA512

20f98dd5c76b3a2f2cc7892ac0f9ccc056edd971b818cea297a4be64d645265df116c269ac60f60e5b8e034b5617ce59493895ba223a3bb823b130121c74a33e
SSDEEP

196608:rzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzb:

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\hsotpypz = "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
868	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\hsotpypz\ImagePath = "C:\\Windows\\SysWOW64\\hsotpypz\\vzkcgnou.exe"	svchost.exe

Deletes itself 1 IoCs

pid	Process
2472	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2640	vzkcgnou.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2640 set thread context of 2472	2640	vzkcgnou.exe	41

Launches sc.exe 3 IoCs

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

pid	Process
2272	sc.exe
2880	sc.exe
2480	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 2204 wrote to memory of 2928	2204	3c7b639b7991255518ac3ff7a9cd7926.exe	29
PID 2204 wrote to memory of 2928	2204	3c7b639b7991255518ac3ff7a9cd7926.exe	29
PID 2204 wrote to memory of 2928	2204	3c7b639b7991255518ac3ff7a9cd7926.exe	29
PID 2204 wrote to memory of 2928	2204	3c7b639b7991255518ac3ff7a9cd7926.exe	29
PID 2204 wrote to memory of 964	2204	3c7b639b7991255518ac3ff7a9cd7926.exe	31
PID 2204 wrote to memory of 964	2204	3c7b639b7991255518ac3ff7a9cd7926.exe	31
PID 2204 wrote to memory of 964	2204	3c7b639b7991255518ac3ff7a9cd7926.exe	31
PID 2204 wrote to memory of 964	2204	3c7b639b7991255518ac3ff7a9cd7926.exe	31
PID 2204 wrote to memory of 2272	2204	3c7b639b7991255518ac3ff7a9cd7926.exe	33
PID 2204 wrote to memory of 2272	2204	3c7b639b7991255518ac3ff7a9cd7926.exe	33
PID 2204 wrote to memory of 2272	2204	3c7b639b7991255518ac3ff7a9cd7926.exe	33
PID 2204 wrote to memory of 2272	2204	3c7b639b7991255518ac3ff7a9cd7926.exe	33
PID 2204 wrote to memory of 2880	2204	3c7b639b7991255518ac3ff7a9cd7926.exe	35
PID 2204 wrote to memory of 2880	2204	3c7b639b7991255518ac3ff7a9cd7926.exe	35
PID 2204 wrote to memory of 2880	2204	3c7b639b7991255518ac3ff7a9cd7926.exe	35
PID 2204 wrote to memory of 2880	2204	3c7b639b7991255518ac3ff7a9cd7926.exe	35
PID 2204 wrote to memory of 2480	2204	3c7b639b7991255518ac3ff7a9cd7926.exe	37
PID 2204 wrote to memory of 2480	2204	3c7b639b7991255518ac3ff7a9cd7926.exe	37
PID 2204 wrote to memory of 2480	2204	3c7b639b7991255518ac3ff7a9cd7926.exe	37
PID 2204 wrote to memory of 2480	2204	3c7b639b7991255518ac3ff7a9cd7926.exe	37
PID 2204 wrote to memory of 868	2204	3c7b639b7991255518ac3ff7a9cd7926.exe	40
PID 2204 wrote to memory of 868	2204	3c7b639b7991255518ac3ff7a9cd7926.exe	40
PID 2204 wrote to memory of 868	2204	3c7b639b7991255518ac3ff7a9cd7926.exe	40
PID 2204 wrote to memory of 868	2204	3c7b639b7991255518ac3ff7a9cd7926.exe	40
PID 2640 wrote to memory of 2472	2640	vzkcgnou.exe	41
PID 2640 wrote to memory of 2472	2640	vzkcgnou.exe	41
PID 2640 wrote to memory of 2472	2640	vzkcgnou.exe	41
PID 2640 wrote to memory of 2472	2640	vzkcgnou.exe	41
PID 2640 wrote to memory of 2472	2640	vzkcgnou.exe	41
PID 2640 wrote to memory of 2472	2640	vzkcgnou.exe	41

C:\Users\Admin\AppData\Local\Temp\3c7b639b7991255518ac3ff7a9cd7926.exe
"C:\Users\Admin\AppData\Local\Temp\3c7b639b7991255518ac3ff7a9cd7926.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:2204
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\hsotpypz\
  2⤵
  PID:2928
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\vzkcgnou.exe" C:\Windows\SysWOW64\hsotpypz\
  2⤵
  PID:964
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create hsotpypz binPath= "C:\Windows\SysWOW64\hsotpypz\vzkcgnou.exe /d\"C:\Users\Admin\AppData\Local\Temp\3c7b639b7991255518ac3ff7a9cd7926.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:2272
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description hsotpypz "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:2880
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start hsotpypz
  2⤵
  - Launches sc.exe
  PID:2480
- 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:868

C:\Windows\SysWOW64\hsotpypz\vzkcgnou.exe
C:\Windows\SysWOW64\hsotpypz\vzkcgnou.exe /d"C:\Users\Admin\AppData\Local\Temp\3c7b639b7991255518ac3ff7a9cd7926.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2640
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Windows security bypass
  - Sets service image path in registry
  - Deletes itself
  PID:2472

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

memory/2204-2-0x0000000000220000-0x0000000000233000-memory.dmp

Filesize
76KB

Download
memory/2204-4-0x0000000000400000-0x00000000008EB000-memory.dmp

Filesize
4.9MB

Download
memory/2204-1-0x00000000009F0000-0x0000000000AF0000-memory.dmp

Filesize
1024KB

Download
memory/2204-7-0x0000000000400000-0x00000000008EB000-memory.dmp

Filesize
4.9MB

Download
memory/2472-12-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download
memory/2472-20-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download
memory/2472-19-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download
memory/2472-10-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2472-9-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download
memory/2472-21-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download
memory/2640-14-0x0000000000A50000-0x0000000000B50000-memory.dmp

Filesize
1024KB

Download
memory/2640-16-0x0000000000400000-0x00000000008EB000-memory.dmp

Filesize
4.9MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads