tofsee | 178bacb30c32c9f55b745eeb54f3f35810c3cbfb727766077db677dd2ad9b4cb

Analysis

max time kernel
149s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
21/03/2024, 00:52

Sharing

Copy URL Twitter E-mail

Report Analysis Logs

General

Target
da44b47d471d0e53d7715a75b94b3857.exe
Size 12.1MB
Sample240321-a8d15agh3w
SHA256 178bacb30c32c9f55b745eeb54f3f35810c3cbfb727766077db677dd2ad9b4cb
MD5 da44b47d471d0e53d7715a75b94b3857
SHA1 02a241446120ec95e2af990370b52f3fedbd0d35
SHA512 b088ba97a970243f725d638c59c364a88f64a32b9fe8ca98403f142ab1dc32b80b3c52d39d87c8d8a0bcdb5f4aedbb0c6eeaaa9e7781caee859b174fc039cb0d
SSDEEP 49152:bj55555555555555555555555555555555555555555555555555555555555557:
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

tofsee evasion persistence trojan

Malware Config

Extracted

Family

tofsee

43.231.4.7
lazystax.ru

Signatures

Tofsee
Backdoor/botnet which carries out malicious activities based on commands from a C2 server.
trojan tofsee
Creates new service(s) 1 TTPs
persistence

Windows Service
T1543.003

Modifies Windows Firewall 2 TTPs 1 IoCs

evasion

Windows Service

T1543.003

Disable or Modify System Firewall

T1562.004

pid	Process
4784	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\qsxqrdpj\ImagePath = "C:\\Windows\\SysWOW64\\qsxqrdpj\\oabvqmnk.exe"	svchost.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-3270530367-132075249-2153716227-1000\Control Panel\International\Geo\Nation	da44b47d471d0e53d7715a75b94b3857.exe

Deletes itself 1 IoCs

pid	Process
4984	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
4424	oabvqmnk.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4424 set thread context of 4984	4424	oabvqmnk.exe	106

Launches sc.exe 3 IoCs

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

pid	Process
2896	sc.exe
3144	sc.exe
3588	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 23 IoCs

description	pid	Process	procid_target
PID 4348 wrote to memory of 1224	4348	da44b47d471d0e53d7715a75b94b3857.exe	90
PID 4348 wrote to memory of 1224	4348	da44b47d471d0e53d7715a75b94b3857.exe	90
PID 4348 wrote to memory of 1224	4348	da44b47d471d0e53d7715a75b94b3857.exe	90
PID 4348 wrote to memory of 4024	4348	da44b47d471d0e53d7715a75b94b3857.exe	96
PID 4348 wrote to memory of 4024	4348	da44b47d471d0e53d7715a75b94b3857.exe	96
PID 4348 wrote to memory of 4024	4348	da44b47d471d0e53d7715a75b94b3857.exe	96
PID 4348 wrote to memory of 2896	4348	da44b47d471d0e53d7715a75b94b3857.exe	98
PID 4348 wrote to memory of 2896	4348	da44b47d471d0e53d7715a75b94b3857.exe	98
PID 4348 wrote to memory of 2896	4348	da44b47d471d0e53d7715a75b94b3857.exe	98
PID 4348 wrote to memory of 3144	4348	da44b47d471d0e53d7715a75b94b3857.exe	101
PID 4348 wrote to memory of 3144	4348	da44b47d471d0e53d7715a75b94b3857.exe	101
PID 4348 wrote to memory of 3144	4348	da44b47d471d0e53d7715a75b94b3857.exe	101
PID 4348 wrote to memory of 3588	4348	da44b47d471d0e53d7715a75b94b3857.exe	103
PID 4348 wrote to memory of 3588	4348	da44b47d471d0e53d7715a75b94b3857.exe	103
PID 4348 wrote to memory of 3588	4348	da44b47d471d0e53d7715a75b94b3857.exe	103
PID 4424 wrote to memory of 4984	4424	oabvqmnk.exe	106
PID 4424 wrote to memory of 4984	4424	oabvqmnk.exe	106
PID 4424 wrote to memory of 4984	4424	oabvqmnk.exe	106
PID 4424 wrote to memory of 4984	4424	oabvqmnk.exe	106
PID 4424 wrote to memory of 4984	4424	oabvqmnk.exe	106
PID 4348 wrote to memory of 4784	4348	da44b47d471d0e53d7715a75b94b3857.exe	107
PID 4348 wrote to memory of 4784	4348	da44b47d471d0e53d7715a75b94b3857.exe	107
PID 4348 wrote to memory of 4784	4348	da44b47d471d0e53d7715a75b94b3857.exe	107

C:\Users\Admin\AppData\Local\Temp\da44b47d471d0e53d7715a75b94b3857.exe
"C:\Users\Admin\AppData\Local\Temp\da44b47d471d0e53d7715a75b94b3857.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4348
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\qsxqrdpj\
  2⤵
  PID:1224
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\oabvqmnk.exe" C:\Windows\SysWOW64\qsxqrdpj\
  2⤵
  PID:4024
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create qsxqrdpj binPath= "C:\Windows\SysWOW64\qsxqrdpj\oabvqmnk.exe /d\"C:\Users\Admin\AppData\Local\Temp\da44b47d471d0e53d7715a75b94b3857.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:2896
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description qsxqrdpj "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:3144
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start qsxqrdpj
  2⤵
  - Launches sc.exe
  PID:3588
- 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:4784

C:\Windows\SysWOW64\qsxqrdpj\oabvqmnk.exe
C:\Windows\SysWOW64\qsxqrdpj\oabvqmnk.exe /d"C:\Users\Admin\AppData\Local\Temp\da44b47d471d0e53d7715a75b94b3857.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4424
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  PID:4984

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 System Firewall

T1562.004

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

oabvqmnk.exe

Path C:\Users\Admin\AppData\Local\Temp\oabvqmnk.exe
Size 13.2MB
SHA256 8c586fc96039a4afed2833a182d71fc3d7787c7efdc1a93f0851fd89ae2951b4
MD5 6292c0b4bc65e2bffa182473ae0ad832
SHA1 d2379bf18dc0b3ec0bded4e09b146444ba2ad122
SHA512 038f0b8c5f0d05de353d3d58bcfc9e4a382c795e8616f56c987e7934ba3fc8b70d0c6d92bdcc6471c9b8b7416080b3d9cdab0434376170325dc8b32a393acc53
SSDEEP 49152:9j55555555555555555555555555555555555555555555555555555555555559:
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/4348-15-0x0000000000400000-0x000000000041E000-memory.dmp

Download

memory/4348-1-0x00000000005C0000-0x00000000005C1000-memory.dmp

Download

memory/4348-3-0x00000000005E0000-0x00000000005E1000-memory.dmp

Download

memory/4348-2-0x0000000000400000-0x000000000041E000-memory.dmp

Download

memory/4348-0-0x0000000000400000-0x000000000041E000-memory.dmp

Download

memory/4424-7-0x0000000000400000-0x000000000041E000-memory.dmp

Download

memory/4424-9-0x0000000000460000-0x0000000000461000-memory.dmp

Download

memory/4424-11-0x0000000000400000-0x000000000041E000-memory.dmp

Download

memory/4984-10-0x00000000007B0000-0x00000000007C5000-memory.dmp

Download

memory/4984-14-0x00000000007B0000-0x00000000007C5000-memory.dmp

Download

memory/4984-16-0x00000000007B0000-0x00000000007C5000-memory.dmp

Download

memory/4984-17-0x00000000007B0000-0x00000000007C5000-memory.dmp

Download

memory/4984-18-0x00000000007B0000-0x00000000007C5000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads