tofsee | 916264a72ba7e6ab72941fadd14604649ac8afe6865c755ae32528cd8e20f9a4

Analysis

max time kernel
164s
max time network
173s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
07/01/2024, 19:20

Sharing

Copy URL Twitter E-mail

Report Analysis Logs

General

Target
a3592693bf98d11182e83ed40779c3a1.exe
Size 14.0MB
Sample240107-x18l4accdr
SHA256 916264a72ba7e6ab72941fadd14604649ac8afe6865c755ae32528cd8e20f9a4
MD5 a3592693bf98d11182e83ed40779c3a1
SHA1 c19e3a35d2b90f2099f34caffdaab6e14d4488d4
SHA512 e557ed6c28577ab66c830e9a02ba4edc238a7e555f0fac47b7a3afad98523ade9acda9325d6959ad5bb9bba794c2354db9dfc1131d7136f87deb733f2d0baf75
SSDEEP 49152:oaafPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPP:o
MD5 SHA1 SHA512 SSDEEP

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
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
944	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\ufgslxop\ImagePath = "C:\\Windows\\SysWOW64\\ufgslxop\\axusepes.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-1-5-21-3073191680-435865314-2862784915-1000\Control Panel\International\Geo\Nation	a3592693bf98d11182e83ed40779c3a1.exe

Deletes itself 1 IoCs

pid	Process
3656	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
4732	axusepes.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4732 set thread context of 3656	4732	axusepes.exe	110

Launches sc.exe 3 IoCs

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

pid	Process
4420	sc.exe
3804	sc.exe
3284	sc.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Program crash 2 IoCs

pid	pid_target	Process	procid_target
1540	3156	WerFault.exe	89
3308	4732	WerFault.exe	108

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 3156 wrote to memory of 440	3156	a3592693bf98d11182e83ed40779c3a1.exe	94
PID 3156 wrote to memory of 440	3156	a3592693bf98d11182e83ed40779c3a1.exe	94
PID 3156 wrote to memory of 440	3156	a3592693bf98d11182e83ed40779c3a1.exe	94
PID 3156 wrote to memory of 1064	3156	a3592693bf98d11182e83ed40779c3a1.exe	96
PID 3156 wrote to memory of 1064	3156	a3592693bf98d11182e83ed40779c3a1.exe	96
PID 3156 wrote to memory of 1064	3156	a3592693bf98d11182e83ed40779c3a1.exe	96
PID 3156 wrote to memory of 4420	3156	a3592693bf98d11182e83ed40779c3a1.exe	98
PID 3156 wrote to memory of 4420	3156	a3592693bf98d11182e83ed40779c3a1.exe	98
PID 3156 wrote to memory of 4420	3156	a3592693bf98d11182e83ed40779c3a1.exe	98
PID 3156 wrote to memory of 3804	3156	a3592693bf98d11182e83ed40779c3a1.exe	100
PID 3156 wrote to memory of 3804	3156	a3592693bf98d11182e83ed40779c3a1.exe	100
PID 3156 wrote to memory of 3804	3156	a3592693bf98d11182e83ed40779c3a1.exe	100
PID 3156 wrote to memory of 3284	3156	a3592693bf98d11182e83ed40779c3a1.exe	102
PID 3156 wrote to memory of 3284	3156	a3592693bf98d11182e83ed40779c3a1.exe	102
PID 3156 wrote to memory of 3284	3156	a3592693bf98d11182e83ed40779c3a1.exe	102
PID 3156 wrote to memory of 944	3156	a3592693bf98d11182e83ed40779c3a1.exe	104
PID 3156 wrote to memory of 944	3156	a3592693bf98d11182e83ed40779c3a1.exe	104
PID 3156 wrote to memory of 944	3156	a3592693bf98d11182e83ed40779c3a1.exe	104
PID 4732 wrote to memory of 3656	4732	axusepes.exe	110
PID 4732 wrote to memory of 3656	4732	axusepes.exe	110
PID 4732 wrote to memory of 3656	4732	axusepes.exe	110
PID 4732 wrote to memory of 3656	4732	axusepes.exe	110
PID 4732 wrote to memory of 3656	4732	axusepes.exe	110

C:\Users\Admin\AppData\Local\Temp\a3592693bf98d11182e83ed40779c3a1.exe
"C:\Users\Admin\AppData\Local\Temp\a3592693bf98d11182e83ed40779c3a1.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3156
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\ufgslxop\
  2⤵
  PID:440
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\axusepes.exe" C:\Windows\SysWOW64\ufgslxop\
  2⤵
  PID:1064
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create ufgslxop binPath= "C:\Windows\SysWOW64\ufgslxop\axusepes.exe /d\"C:\Users\Admin\AppData\Local\Temp\a3592693bf98d11182e83ed40779c3a1.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:4420
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description ufgslxop "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:3804
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start ufgslxop
  2⤵
  - Launches sc.exe
  PID:3284
- 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:944
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3156 -s 1216
  2⤵
  - Program crash
  PID:1540

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 460 -p 3156 -ip 3156
1⤵
PID:4688

C:\Windows\SysWOW64\ufgslxop\axusepes.exe
C:\Windows\SysWOW64\ufgslxop\axusepes.exe /d"C:\Users\Admin\AppData\Local\Temp\a3592693bf98d11182e83ed40779c3a1.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4732
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  PID:3656
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4732 -s 512
  2⤵
  - Program crash
  PID:3308

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 464 -p 4732 -ip 4732
1⤵
PID:756

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

Replay Monitor

Loading Replay Monitor...

Downloads

axusepes.exe

Path C:\Users\Admin\AppData\Local\Temp\axusepes.exe
Size 10.8MB
SHA256 50c0e861c50ff816aedc494b25ad28051f9e8ef22f9fba0755bdcbbc70e130a0
MD5 19b23170bef0ac7c774d0266537bd2eb
SHA1 00aeb2c323c935f6b6fc95aff1eecc36ecb777f6
SHA512 1baba4d40aae31936ad931df8079b803ac8e3036bc563d5faed66471380bdefc9a9513728bb5b264dfd93b674e2c761749a70eefa45d7aa898f4c5448d081fc9
SSDEEP 49152:uaafPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPH:u
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/3156-8-0x0000000002990000-0x00000000029A3000-memory.dmp

Download

memory/3156-4-0x0000000000400000-0x0000000000C17000-memory.dmp

Download

memory/3156-5-0x0000000000400000-0x0000000000C17000-memory.dmp

Download

memory/3156-2-0x0000000002990000-0x00000000029A3000-memory.dmp

Download

memory/3156-7-0x0000000000400000-0x0000000000C17000-memory.dmp

Download

memory/3156-1-0x0000000000E60000-0x0000000000F60000-memory.dmp

Download

memory/3656-17-0x00000000010B0000-0x00000000010C5000-memory.dmp

Download

memory/3656-13-0x00000000010B0000-0x00000000010C5000-memory.dmp

Download

memory/3656-16-0x00000000010B0000-0x00000000010C5000-memory.dmp

Download

memory/3656-19-0x00000000010B0000-0x00000000010C5000-memory.dmp

Download

memory/3656-20-0x00000000010B0000-0x00000000010C5000-memory.dmp

Download

memory/4732-12-0x0000000000400000-0x0000000000C17000-memory.dmp

Download

memory/4732-11-0x0000000000F20000-0x0000000001020000-memory.dmp

Download

memory/4732-18-0x0000000000400000-0x0000000000C17000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads