tofsee | 8ea2b0614c9be2a43e43043cf1ffab9ffc209521a47483f80ddd3fadf09b24fd

Analysis

max time kernel
148s
max time network
158s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
29/12/2023, 20:31

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General

Target
0336c926f2f7d19338895e234b2eceac.exe
Size 12.1MB
Sample231229-za5hvsgca3
SHA256 8ea2b0614c9be2a43e43043cf1ffab9ffc209521a47483f80ddd3fadf09b24fd
MD5 0336c926f2f7d19338895e234b2eceac
SHA1 7d18e37680655b03c47c744ced08466062d81dc7
SHA512 683cc1f15b63777ce983809e69f0a2f38a3565e9c9f7761ed4cde1b6136cc658fad7dec716c71ad8adfa33676dc83c390e1c7abc659c2e498af30260930f980f
SSDEEP 49152:HT81MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMD:HT8
MD5 SHA1 SHA512 SSDEEP

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
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
3648	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\kofvydpi\ImagePath = "C:\\Windows\\SysWOW64\\kofvydpi\\lccvlklz.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-1-5-21-2398549320-3657759451-817663969-1000\Control Panel\International\Geo\Nation	0336c926f2f7d19338895e234b2eceac.exe

Executes dropped EXE 1 IoCs

pid	Process
4020	lccvlklz.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4020 set thread context of 2872	4020	lccvlklz.exe	106

Launches sc.exe 3 IoCs

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

pid	Process
2636	sc.exe
1904	sc.exe
5004	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 2540 wrote to memory of 1372	2540	0336c926f2f7d19338895e234b2eceac.exe	89
PID 2540 wrote to memory of 1372	2540	0336c926f2f7d19338895e234b2eceac.exe	89
PID 2540 wrote to memory of 1372	2540	0336c926f2f7d19338895e234b2eceac.exe	89
PID 2540 wrote to memory of 1512	2540	0336c926f2f7d19338895e234b2eceac.exe	91
PID 2540 wrote to memory of 1512	2540	0336c926f2f7d19338895e234b2eceac.exe	91
PID 2540 wrote to memory of 1512	2540	0336c926f2f7d19338895e234b2eceac.exe	91
PID 2540 wrote to memory of 5004	2540	0336c926f2f7d19338895e234b2eceac.exe	94
PID 2540 wrote to memory of 5004	2540	0336c926f2f7d19338895e234b2eceac.exe	94
PID 2540 wrote to memory of 5004	2540	0336c926f2f7d19338895e234b2eceac.exe	94
PID 2540 wrote to memory of 2636	2540	0336c926f2f7d19338895e234b2eceac.exe	99
PID 2540 wrote to memory of 2636	2540	0336c926f2f7d19338895e234b2eceac.exe	99
PID 2540 wrote to memory of 2636	2540	0336c926f2f7d19338895e234b2eceac.exe	99
PID 2540 wrote to memory of 1904	2540	0336c926f2f7d19338895e234b2eceac.exe	100
PID 2540 wrote to memory of 1904	2540	0336c926f2f7d19338895e234b2eceac.exe	100
PID 2540 wrote to memory of 1904	2540	0336c926f2f7d19338895e234b2eceac.exe	100
PID 2540 wrote to memory of 3648	2540	0336c926f2f7d19338895e234b2eceac.exe	103
PID 2540 wrote to memory of 3648	2540	0336c926f2f7d19338895e234b2eceac.exe	103
PID 2540 wrote to memory of 3648	2540	0336c926f2f7d19338895e234b2eceac.exe	103
PID 4020 wrote to memory of 2872	4020	lccvlklz.exe	106
PID 4020 wrote to memory of 2872	4020	lccvlklz.exe	106
PID 4020 wrote to memory of 2872	4020	lccvlklz.exe	106
PID 4020 wrote to memory of 2872	4020	lccvlklz.exe	106
PID 4020 wrote to memory of 2872	4020	lccvlklz.exe	106

C:\Users\Admin\AppData\Local\Temp\0336c926f2f7d19338895e234b2eceac.exe
"C:\Users\Admin\AppData\Local\Temp\0336c926f2f7d19338895e234b2eceac.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2540
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\kofvydpi\
  2⤵
  PID:1372
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\lccvlklz.exe" C:\Windows\SysWOW64\kofvydpi\
  2⤵
  PID:1512
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create kofvydpi binPath= "C:\Windows\SysWOW64\kofvydpi\lccvlklz.exe /d\"C:\Users\Admin\AppData\Local\Temp\0336c926f2f7d19338895e234b2eceac.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:5004
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description kofvydpi "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:2636
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start kofvydpi
  2⤵
  - Launches sc.exe
  PID:1904
- 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:3648

C:\Windows\SysWOW64\kofvydpi\lccvlklz.exe
C:\Windows\SysWOW64\kofvydpi\lccvlklz.exe /d"C:\Users\Admin\AppData\Local\Temp\0336c926f2f7d19338895e234b2eceac.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4020
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  PID:2872

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

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

lccvlklz.exe

Path C:\Users\Admin\AppData\Local\Temp\lccvlklz.exe
Size 13.6MB
SHA256 513f34335f65a3649b83b6080de9eafb0de67cfcdd924565114caf7ea3c0feda
MD5 be616a7eb0800457153b5e68d56243b0
SHA1 a3091f4bd20cf5e4e89841e0da5d237ba7b078e7
SHA512 efa16fd4836afe6810c8d3d14ae060567cf7b36129e6a6482771f4039caa079a6e2acc307f07ea9070518b9ddbc0c06907ff2935f81f3abc6399b3c3a5153e63
SSDEEP 49152:fT81MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMU:fT8
MD5 SHA1 SHA512 SSDEEP

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memory/2540-15-0x0000000000400000-0x000000000046E000-memory.dmp

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memory/2540-3-0x0000000000400000-0x000000000046E000-memory.dmp

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memory/2540-2-0x0000000002070000-0x0000000002083000-memory.dmp

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memory/2540-22-0x00000000004B0000-0x00000000005B0000-memory.dmp

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memory/2540-1-0x00000000004B0000-0x00000000005B0000-memory.dmp

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memory/2872-14-0x00000000012B0000-0x00000000012C5000-memory.dmp

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memory/2872-11-0x00000000012B0000-0x00000000012C5000-memory.dmp

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memory/2872-16-0x00000000012B0000-0x00000000012C5000-memory.dmp

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memory/2872-17-0x00000000012B0000-0x00000000012C5000-memory.dmp

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memory/2872-26-0x00000000012B0000-0x00000000012C5000-memory.dmp

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memory/4020-9-0x00000000006E0000-0x00000000006F3000-memory.dmp

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memory/4020-10-0x0000000000400000-0x000000000046E000-memory.dmp

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memory/4020-19-0x0000000000400000-0x000000000046E000-memory.dmp

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memory/4020-8-0x0000000000770000-0x0000000000870000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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