tofsee | 5363de7557a8cea70d59831cdeb9f42268f0d8628168c343bcd8f09851d0b6c2

General

Target

26c40137d44baffaed0feef784b5a6bd.exe
Size

14.7MB
MD5

26c40137d44baffaed0feef784b5a6bd
SHA1

cbd0f74afe260641d62a4020e6d3f00d56c14e75
SHA256

5363de7557a8cea70d59831cdeb9f42268f0d8628168c343bcd8f09851d0b6c2
SHA512

12f9c4a04590c72c75796eebcd06e7f8f7c94bd5495c57dee75ab9abbf6d3c8bca8be8edb4d86e2a17cff88116c4449fba491b201cf194859c259f75ae98b4c3
SSDEEP

98304:Bffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffn:

Score

10^/10

tofsee evasion persistence trojan

Malware Config

Extracted

Family

tofsee

C2

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 1 TTPs 1 IoCs

evasion

Windows Service

T1543.003

pid	Process
444	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\hvlzqgqb\ImagePath = "C:\\Windows\\SysWOW64\\hvlzqgqb\\bnoidzax.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-1-5-21-3791175113-1062217823-1177695025-1000\Control Panel\International\Geo\Nation	26c40137d44baffaed0feef784b5a6bd.exe

Deletes itself 1 IoCs

pid	Process
1472	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
912	bnoidzax.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 912 set thread context of 1472	912	bnoidzax.exe	103

Launches sc.exe 3 IoCs

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

pid	Process
4676	sc.exe
2204	sc.exe
3020	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 3768 wrote to memory of 1384	3768	26c40137d44baffaed0feef784b5a6bd.exe	92
PID 3768 wrote to memory of 1384	3768	26c40137d44baffaed0feef784b5a6bd.exe	92
PID 3768 wrote to memory of 1384	3768	26c40137d44baffaed0feef784b5a6bd.exe	92
PID 3768 wrote to memory of 4792	3768	26c40137d44baffaed0feef784b5a6bd.exe	93
PID 3768 wrote to memory of 4792	3768	26c40137d44baffaed0feef784b5a6bd.exe	93
PID 3768 wrote to memory of 4792	3768	26c40137d44baffaed0feef784b5a6bd.exe	93
PID 3768 wrote to memory of 3020	3768	26c40137d44baffaed0feef784b5a6bd.exe	96
PID 3768 wrote to memory of 3020	3768	26c40137d44baffaed0feef784b5a6bd.exe	96
PID 3768 wrote to memory of 3020	3768	26c40137d44baffaed0feef784b5a6bd.exe	96
PID 3768 wrote to memory of 4676	3768	26c40137d44baffaed0feef784b5a6bd.exe	99
PID 3768 wrote to memory of 4676	3768	26c40137d44baffaed0feef784b5a6bd.exe	99
PID 3768 wrote to memory of 4676	3768	26c40137d44baffaed0feef784b5a6bd.exe	99
PID 3768 wrote to memory of 2204	3768	26c40137d44baffaed0feef784b5a6bd.exe	100
PID 3768 wrote to memory of 2204	3768	26c40137d44baffaed0feef784b5a6bd.exe	100
PID 3768 wrote to memory of 2204	3768	26c40137d44baffaed0feef784b5a6bd.exe	100
PID 912 wrote to memory of 1472	912	bnoidzax.exe	103
PID 912 wrote to memory of 1472	912	bnoidzax.exe	103
PID 912 wrote to memory of 1472	912	bnoidzax.exe	103
PID 912 wrote to memory of 1472	912	bnoidzax.exe	103
PID 912 wrote to memory of 1472	912	bnoidzax.exe	103
PID 3768 wrote to memory of 444	3768	26c40137d44baffaed0feef784b5a6bd.exe	105
PID 3768 wrote to memory of 444	3768	26c40137d44baffaed0feef784b5a6bd.exe	105
PID 3768 wrote to memory of 444	3768	26c40137d44baffaed0feef784b5a6bd.exe	105

C:\Users\Admin\AppData\Local\Temp\26c40137d44baffaed0feef784b5a6bd.exe
"C:\Users\Admin\AppData\Local\Temp\26c40137d44baffaed0feef784b5a6bd.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3768
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\hvlzqgqb\
  2⤵
  PID:1384
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\bnoidzax.exe" C:\Windows\SysWOW64\hvlzqgqb\
  2⤵
  PID:4792
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create hvlzqgqb binPath= "C:\Windows\SysWOW64\hvlzqgqb\bnoidzax.exe /d\"C:\Users\Admin\AppData\Local\Temp\26c40137d44baffaed0feef784b5a6bd.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:3020
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description hvlzqgqb "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:4676
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start hvlzqgqb
  2⤵
  - Launches sc.exe
  PID:2204
- 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:444

C:\Windows\SysWOW64\hvlzqgqb\bnoidzax.exe
C:\Windows\SysWOW64\hvlzqgqb\bnoidzax.exe /d"C:\Users\Admin\AppData\Local\Temp\26c40137d44baffaed0feef784b5a6bd.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:912
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  PID:1472

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

C:\Users\Admin\AppData\Local\Temp\bnoidzax.exe

Filesize
1.4MB

MD5
c6726c91a1c7061468baa99d3d91eec9

SHA1
a5df3db886c055a446b1b4df06df8daa78823e3d

SHA256
af2526d928d2b8ce0436d0586968512f6666f2b6f629a7828cefc28e48053d8a

SHA512
7918fdf85972f4778e0da7ec11247f14874afb5f857822929b2d1db40a3a0fe947252fb62ac63e45bf2a1a27a5e0b72d3d0efd939b68fa0496dcba591622d92d

Download Submit
C:\Windows\SysWOW64\hvlzqgqb\bnoidzax.exe

Filesize
1.3MB

MD5
7770dad781f42d9baf4a332be80348c0

SHA1
2315b07fbde7dc3559360427193c3347888e6753

SHA256
698ecc11657305a7dcd30c8a7ab92e4613be779da4b698cf67104770f5ab3bf8

SHA512
27e0a5f3df0da8bd20c5d7210aef7473003a92438cb164fecefcf160e6f7f4918731e7f2333e98862b8c887f7f512228edeaaacfb71e3e8b78a176dbbabde2b3

Download Submit
memory/912-6-0x0000000000D90000-0x0000000000D91000-memory.dmp

Filesize
4KB

Download
memory/912-9-0x0000000000400000-0x000000000041C000-memory.dmp

Filesize
112KB

Download
memory/1472-12-0x00000000006A0000-0x00000000006B5000-memory.dmp

Filesize
84KB

Download
memory/1472-8-0x00000000006A0000-0x00000000006B5000-memory.dmp

Filesize
84KB

Download
memory/1472-15-0x00000000006A0000-0x00000000006B5000-memory.dmp

Filesize
84KB

Download
memory/1472-14-0x00000000006A0000-0x00000000006B5000-memory.dmp

Filesize
84KB

Download
memory/1472-16-0x00000000006A0000-0x00000000006B5000-memory.dmp

Filesize
84KB

Download
memory/3768-2-0x00000000009D0000-0x00000000009D1000-memory.dmp

Filesize
4KB

Download
memory/3768-0-0x0000000000AF0000-0x0000000000AF1000-memory.dmp

Filesize
4KB

Download
memory/3768-1-0x0000000000400000-0x000000000041C000-memory.dmp

Filesize
112KB

Download
memory/3768-13-0x0000000000400000-0x000000000041C000-memory.dmp

Filesize
112KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads