tofsee | 58dc195b75018955a9c8fdd8a6526a2602fb1b1a36ebd44f1e71d5e0e9fac333

Analysis

max time kernel
147s
max time network
153s
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, 14:25

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General

Target
dbd97def3112b86e795bc31f8bdb58b6.exe
Size 11.1MB
Sample240321-rrfxtsdd83
SHA256 58dc195b75018955a9c8fdd8a6526a2602fb1b1a36ebd44f1e71d5e0e9fac333
MD5 dbd97def3112b86e795bc31f8bdb58b6
SHA1 d4828e7cebe66ae7f596f1e002dc44b15f3063d8
SHA512 6802e6043b4ebdbd92b0517084b65ffca42753a8dd40db3e17b23cc868d763fb604727523aeab403bab92926ee0900330872f6a41fa6d1078573776502893e32
SSDEEP 49152:Oj5555555555555555555555555555555555555555555555555555555555555J:
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
996	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\vvaxwqdk\ImagePath = "C:\\Windows\\SysWOW64\\vvaxwqdk\\lhbhnphy.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-1-5-21-513485977-2495024337-1260977654-1000\Control Panel\International\Geo\Nation	dbd97def3112b86e795bc31f8bdb58b6.exe

Deletes itself 1 IoCs

pid	Process
4756	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
4736	lhbhnphy.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4736 set thread context of 4756	4736	lhbhnphy.exe	102

Launches sc.exe 3 IoCs

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

pid	Process
4516	sc.exe
4732	sc.exe
664	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 2776 wrote to memory of 740	2776	dbd97def3112b86e795bc31f8bdb58b6.exe	89
PID 2776 wrote to memory of 740	2776	dbd97def3112b86e795bc31f8bdb58b6.exe	89
PID 2776 wrote to memory of 740	2776	dbd97def3112b86e795bc31f8bdb58b6.exe	89
PID 2776 wrote to memory of 2696	2776	dbd97def3112b86e795bc31f8bdb58b6.exe	91
PID 2776 wrote to memory of 2696	2776	dbd97def3112b86e795bc31f8bdb58b6.exe	91
PID 2776 wrote to memory of 2696	2776	dbd97def3112b86e795bc31f8bdb58b6.exe	91
PID 2776 wrote to memory of 4516	2776	dbd97def3112b86e795bc31f8bdb58b6.exe	93
PID 2776 wrote to memory of 4516	2776	dbd97def3112b86e795bc31f8bdb58b6.exe	93
PID 2776 wrote to memory of 4516	2776	dbd97def3112b86e795bc31f8bdb58b6.exe	93
PID 2776 wrote to memory of 4732	2776	dbd97def3112b86e795bc31f8bdb58b6.exe	95
PID 2776 wrote to memory of 4732	2776	dbd97def3112b86e795bc31f8bdb58b6.exe	95
PID 2776 wrote to memory of 4732	2776	dbd97def3112b86e795bc31f8bdb58b6.exe	95
PID 2776 wrote to memory of 664	2776	dbd97def3112b86e795bc31f8bdb58b6.exe	97
PID 2776 wrote to memory of 664	2776	dbd97def3112b86e795bc31f8bdb58b6.exe	97
PID 2776 wrote to memory of 664	2776	dbd97def3112b86e795bc31f8bdb58b6.exe	97
PID 2776 wrote to memory of 996	2776	dbd97def3112b86e795bc31f8bdb58b6.exe	99
PID 2776 wrote to memory of 996	2776	dbd97def3112b86e795bc31f8bdb58b6.exe	99
PID 2776 wrote to memory of 996	2776	dbd97def3112b86e795bc31f8bdb58b6.exe	99
PID 4736 wrote to memory of 4756	4736	lhbhnphy.exe	102
PID 4736 wrote to memory of 4756	4736	lhbhnphy.exe	102
PID 4736 wrote to memory of 4756	4736	lhbhnphy.exe	102
PID 4736 wrote to memory of 4756	4736	lhbhnphy.exe	102
PID 4736 wrote to memory of 4756	4736	lhbhnphy.exe	102

C:\Users\Admin\AppData\Local\Temp\dbd97def3112b86e795bc31f8bdb58b6.exe
"C:\Users\Admin\AppData\Local\Temp\dbd97def3112b86e795bc31f8bdb58b6.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2776
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\vvaxwqdk\
  2⤵
  PID:740
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\lhbhnphy.exe" C:\Windows\SysWOW64\vvaxwqdk\
  2⤵
  PID:2696
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create vvaxwqdk binPath= "C:\Windows\SysWOW64\vvaxwqdk\lhbhnphy.exe /d\"C:\Users\Admin\AppData\Local\Temp\dbd97def3112b86e795bc31f8bdb58b6.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:4516
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description vvaxwqdk "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:4732
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start vvaxwqdk
  2⤵
  - Launches sc.exe
  PID:664
- 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:996

C:\Windows\SysWOW64\vvaxwqdk\lhbhnphy.exe
C:\Windows\SysWOW64\vvaxwqdk\lhbhnphy.exe /d"C:\Users\Admin\AppData\Local\Temp\dbd97def3112b86e795bc31f8bdb58b6.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4736
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  PID:4756

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

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Downloads

lhbhnphy.exe

Path C:\Users\Admin\AppData\Local\Temp\lhbhnphy.exe
Size 10.8MB
SHA256 8c74a30f38f69877b4d903dc9482c58a5de80174af4a5d2b3be89c8b51802245
MD5 f028961e19f7b9f1803207484564cf34
SHA1 4adb8838cf888df128aa43a8c41153607dfbd405
SHA512 c5b38203643a1c7cb24b86ec3b2732c560ff864b2e32eb353eab7f03ef5291ddf955f10974221c47cde5767729faf6c3e85dfe1c075cd9c58fe722a306332ba4
SSDEEP 49152:yj55555555555555555555555555555555555555555555555555555555555555:
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/2776-0-0x0000000000400000-0x000000000041E000-memory.dmp

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memory/2776-1-0x0000000002160000-0x0000000002161000-memory.dmp

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memory/2776-2-0x0000000000400000-0x000000000041E000-memory.dmp

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memory/2776-3-0x0000000002170000-0x0000000002171000-memory.dmp

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memory/2776-6-0x0000000000400000-0x000000000041E000-memory.dmp

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memory/4736-8-0x0000000000400000-0x000000000041E000-memory.dmp

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memory/4736-9-0x00000000004A0000-0x00000000004A1000-memory.dmp

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memory/4736-12-0x0000000000400000-0x000000000041E000-memory.dmp

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memory/4756-11-0x00000000010F0000-0x0000000001105000-memory.dmp

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memory/4756-15-0x00000000010F0000-0x0000000001105000-memory.dmp

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memory/4756-16-0x00000000010F0000-0x0000000001105000-memory.dmp

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memory/4756-17-0x00000000010F0000-0x0000000001105000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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