tofsee | 160d6da72d6c8babe18edbcec0072e3e770133330773c065788e747f6fb94e3a

General

Target

384a8eb7269c716f2e2ffa94cd9cb5cd.exe
Size

13.0MB
MD5

384a8eb7269c716f2e2ffa94cd9cb5cd
SHA1

6ef3965faa5857bfadca2162a8ec5febaba13894
SHA256

160d6da72d6c8babe18edbcec0072e3e770133330773c065788e747f6fb94e3a
SHA512

425f8b7da1e7f7d689280852c720d52efb0672827b845bbf132cbe44f531cbc35f96bdc1ae418d1cdee7bc3f37bf7bca2142aeaf38bfa1c30ada9822f01a5baf
SSDEEP

24576:alxdvCcpOKCtBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBh:alzOR

Score

10^/10

tofsee evasion persistence trojan

Malware Config

Extracted

Family

tofsee

C2

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
4064	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\vgfuhhhs\ImagePath = "C:\\Windows\\SysWOW64\\vgfuhhhs\\llidgxog.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-1-5-21-1232405761-1209240240-3206092754-1000\Control Panel\International\Geo\Nation	384a8eb7269c716f2e2ffa94cd9cb5cd.exe

Deletes itself 1 IoCs

pid	Process
1552	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
4628	llidgxog.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4628 set thread context of 1552	4628	llidgxog.exe	103

Launches sc.exe 3 IoCs

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

pid	Process
4636	sc.exe
2020	sc.exe
872	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
3612	3100	WerFault.exe	18
1728	4628	WerFault.exe	85

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 3100 wrote to memory of 4300	3100	384a8eb7269c716f2e2ffa94cd9cb5cd.exe	44
PID 3100 wrote to memory of 4300	3100	384a8eb7269c716f2e2ffa94cd9cb5cd.exe	44
PID 3100 wrote to memory of 4300	3100	384a8eb7269c716f2e2ffa94cd9cb5cd.exe	44
PID 3100 wrote to memory of 2692	3100	384a8eb7269c716f2e2ffa94cd9cb5cd.exe	54
PID 3100 wrote to memory of 2692	3100	384a8eb7269c716f2e2ffa94cd9cb5cd.exe	54
PID 3100 wrote to memory of 2692	3100	384a8eb7269c716f2e2ffa94cd9cb5cd.exe	54
PID 3100 wrote to memory of 4636	3100	384a8eb7269c716f2e2ffa94cd9cb5cd.exe	64
PID 3100 wrote to memory of 4636	3100	384a8eb7269c716f2e2ffa94cd9cb5cd.exe	64
PID 3100 wrote to memory of 4636	3100	384a8eb7269c716f2e2ffa94cd9cb5cd.exe	64
PID 3100 wrote to memory of 2020	3100	384a8eb7269c716f2e2ffa94cd9cb5cd.exe	74
PID 3100 wrote to memory of 2020	3100	384a8eb7269c716f2e2ffa94cd9cb5cd.exe	74
PID 3100 wrote to memory of 2020	3100	384a8eb7269c716f2e2ffa94cd9cb5cd.exe	74
PID 3100 wrote to memory of 872	3100	384a8eb7269c716f2e2ffa94cd9cb5cd.exe	84
PID 3100 wrote to memory of 872	3100	384a8eb7269c716f2e2ffa94cd9cb5cd.exe	84
PID 3100 wrote to memory of 872	3100	384a8eb7269c716f2e2ffa94cd9cb5cd.exe	84
PID 3100 wrote to memory of 4064	3100	384a8eb7269c716f2e2ffa94cd9cb5cd.exe	97
PID 3100 wrote to memory of 4064	3100	384a8eb7269c716f2e2ffa94cd9cb5cd.exe	97
PID 3100 wrote to memory of 4064	3100	384a8eb7269c716f2e2ffa94cd9cb5cd.exe	97
PID 4628 wrote to memory of 1552	4628	llidgxog.exe	103
PID 4628 wrote to memory of 1552	4628	llidgxog.exe	103
PID 4628 wrote to memory of 1552	4628	llidgxog.exe	103
PID 4628 wrote to memory of 1552	4628	llidgxog.exe	103
PID 4628 wrote to memory of 1552	4628	llidgxog.exe	103

C:\Users\Admin\AppData\Local\Temp\384a8eb7269c716f2e2ffa94cd9cb5cd.exe
"C:\Users\Admin\AppData\Local\Temp\384a8eb7269c716f2e2ffa94cd9cb5cd.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3100
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\vgfuhhhs\
  2⤵
  PID:4300
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\llidgxog.exe" C:\Windows\SysWOW64\vgfuhhhs\
  2⤵
  PID:2692
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create vgfuhhhs binPath= "C:\Windows\SysWOW64\vgfuhhhs\llidgxog.exe /d\"C:\Users\Admin\AppData\Local\Temp\384a8eb7269c716f2e2ffa94cd9cb5cd.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:4636
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description vgfuhhhs "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:2020
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start vgfuhhhs
  2⤵
  - Launches sc.exe
  PID:872
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3100 -s 1212
  2⤵
  - Program crash
  PID:3612
- 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:4064

C:\Windows\SysWOW64\vgfuhhhs\llidgxog.exe
C:\Windows\SysWOW64\vgfuhhhs\llidgxog.exe /d"C:\Users\Admin\AppData\Local\Temp\384a8eb7269c716f2e2ffa94cd9cb5cd.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4628
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  PID:1552
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4628 -s 508
  2⤵
  - Program crash
  PID:1728

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 420 -p 3100 -ip 3100
1⤵
PID:2124

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 480 -p 4628 -ip 4628
1⤵
PID:1012

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Create or Modify System Process

2

T1543

Windows Service

2

T1543.003

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Create or Modify System Process

2

T1543

Windows Service

2

T1543.003

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/1552-17-0x0000000000C10000-0x0000000000C25000-memory.dmp

Filesize
84KB

Download
memory/1552-15-0x0000000000C10000-0x0000000000C25000-memory.dmp

Filesize
84KB

Download
memory/1552-10-0x0000000000C10000-0x0000000000C25000-memory.dmp

Filesize
84KB

Download
memory/1552-18-0x0000000000C10000-0x0000000000C25000-memory.dmp

Filesize
84KB

Download
memory/3100-4-0x0000000000400000-0x0000000000468000-memory.dmp

Filesize
416KB

Download
memory/3100-2-0x00000000021B0000-0x00000000021C3000-memory.dmp

Filesize
76KB

Download
memory/3100-1-0x0000000000600000-0x0000000000700000-memory.dmp

Filesize
1024KB

Download
memory/3100-8-0x0000000000400000-0x0000000000468000-memory.dmp

Filesize
416KB

Download
memory/3100-9-0x00000000021B0000-0x00000000021C3000-memory.dmp

Filesize
76KB

Download
memory/4628-16-0x0000000000400000-0x0000000000468000-memory.dmp

Filesize
416KB

Download
memory/4628-12-0x0000000000400000-0x0000000000468000-memory.dmp

Filesize
416KB

Download
memory/4628-11-0x00000000005C0000-0x00000000006C0000-memory.dmp

Filesize
1024KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads