tofsee | b6e325ef4151f615d91c91654957cee9f05cae4317453c77bc2cf8e33e32d316

General

Target

d706628ffe8d972d6c85bbb6bce0091f.exe
Size

10.6MB
MD5

d706628ffe8d972d6c85bbb6bce0091f
SHA1

c964e28b7b2744c5f52b58fd8fea7cc82261957c
SHA256

b6e325ef4151f615d91c91654957cee9f05cae4317453c77bc2cf8e33e32d316
SHA512

d603183402fde672b31b4f708de2e52ea86db0d8cba28f3bbd3b1f5f351638ec1e2acf4a4227cf4cae4b5ce4fc81b6be6b7d2b6923eb1bb7a711e39f20db8aa6
SSDEEP

24576:tLP+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++:

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 2 TTPs 1 IoCs

evasion

Windows Service

T1543.003

Disable or Modify System Firewall

T1562.004

pid	Process
4900	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\xwizgqkr\ImagePath = "C:\\Windows\\SysWOW64\\xwizgqkr\\anenfsuo.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-1-5-21-399997616-3400990511-967324271-1000\Control Panel\International\Geo\Nation	d706628ffe8d972d6c85bbb6bce0091f.exe

Deletes itself 1 IoCs

pid	Process
3756	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2336	anenfsuo.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2336 set thread context of 3756	2336	anenfsuo.exe	112

Launches sc.exe 3 IoCs

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

pid	Process
4124	sc.exe
2712	sc.exe
4920	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
2388	3216	WerFault.exe	87
3760	2336	WerFault.exe	105

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 3216 wrote to memory of 3464	3216	d706628ffe8d972d6c85bbb6bce0091f.exe	91
PID 3216 wrote to memory of 3464	3216	d706628ffe8d972d6c85bbb6bce0091f.exe	91
PID 3216 wrote to memory of 3464	3216	d706628ffe8d972d6c85bbb6bce0091f.exe	91
PID 3216 wrote to memory of 5064	3216	d706628ffe8d972d6c85bbb6bce0091f.exe	95
PID 3216 wrote to memory of 5064	3216	d706628ffe8d972d6c85bbb6bce0091f.exe	95
PID 3216 wrote to memory of 5064	3216	d706628ffe8d972d6c85bbb6bce0091f.exe	95
PID 3216 wrote to memory of 4124	3216	d706628ffe8d972d6c85bbb6bce0091f.exe	97
PID 3216 wrote to memory of 4124	3216	d706628ffe8d972d6c85bbb6bce0091f.exe	97
PID 3216 wrote to memory of 4124	3216	d706628ffe8d972d6c85bbb6bce0091f.exe	97
PID 3216 wrote to memory of 2712	3216	d706628ffe8d972d6c85bbb6bce0091f.exe	100
PID 3216 wrote to memory of 2712	3216	d706628ffe8d972d6c85bbb6bce0091f.exe	100
PID 3216 wrote to memory of 2712	3216	d706628ffe8d972d6c85bbb6bce0091f.exe	100
PID 3216 wrote to memory of 4920	3216	d706628ffe8d972d6c85bbb6bce0091f.exe	103
PID 3216 wrote to memory of 4920	3216	d706628ffe8d972d6c85bbb6bce0091f.exe	103
PID 3216 wrote to memory of 4920	3216	d706628ffe8d972d6c85bbb6bce0091f.exe	103
PID 3216 wrote to memory of 4900	3216	d706628ffe8d972d6c85bbb6bce0091f.exe	106
PID 3216 wrote to memory of 4900	3216	d706628ffe8d972d6c85bbb6bce0091f.exe	106
PID 3216 wrote to memory of 4900	3216	d706628ffe8d972d6c85bbb6bce0091f.exe	106
PID 2336 wrote to memory of 3756	2336	anenfsuo.exe	112
PID 2336 wrote to memory of 3756	2336	anenfsuo.exe	112
PID 2336 wrote to memory of 3756	2336	anenfsuo.exe	112
PID 2336 wrote to memory of 3756	2336	anenfsuo.exe	112
PID 2336 wrote to memory of 3756	2336	anenfsuo.exe	112

C:\Users\Admin\AppData\Local\Temp\d706628ffe8d972d6c85bbb6bce0091f.exe
"C:\Users\Admin\AppData\Local\Temp\d706628ffe8d972d6c85bbb6bce0091f.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3216
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\xwizgqkr\
  2⤵
  PID:3464
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\anenfsuo.exe" C:\Windows\SysWOW64\xwizgqkr\
  2⤵
  PID:5064
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create xwizgqkr binPath= "C:\Windows\SysWOW64\xwizgqkr\anenfsuo.exe /d\"C:\Users\Admin\AppData\Local\Temp\d706628ffe8d972d6c85bbb6bce0091f.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:4124
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description xwizgqkr "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:2712
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start xwizgqkr
  2⤵
  - Launches sc.exe
  PID:4920
- 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:4900
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3216 -s 1036
  2⤵
  - Program crash
  PID:2388

C:\Windows\SysWOW64\xwizgqkr\anenfsuo.exe
C:\Windows\SysWOW64\xwizgqkr\anenfsuo.exe /d"C:\Users\Admin\AppData\Local\Temp\d706628ffe8d972d6c85bbb6bce0091f.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2336
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  PID:3756
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2336 -s 532
  2⤵
  - Program crash
  PID:3760

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 464 -p 3216 -ip 3216
1⤵
PID:2816

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 552 -p 2336 -ip 2336
1⤵
PID:1356

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

Impair Defenses

1

T1562

Disable or Modify System Firewall

Modify Registry

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\anenfsuo.exe

Filesize
3.9MB

MD5
c7f6460b10b818ac34ac59ab2054f968

SHA1
4f9de8d167bfae6849018b8841abfcca39d5bd25

SHA256
ef5b6e08247149db0e10bb875315a4cd99fa851dd55473230b4eb541bca91399

SHA512
8ddaf5510dc9c96accda312ace9208be30109a17dca849fb19c148df2ed7f3f7e7bca85f3851899b755d472ec0d32fa0f3f13e5e8591dffd6f8b184ee1365f21

Download Submit
C:\Windows\SysWOW64\xwizgqkr\anenfsuo.exe

Filesize
6.7MB

MD5
28dcb8b184d781e252874c6dcacd37ff

SHA1
862d3a02ec6a12e7dcdb1881566272042b746db9

SHA256
b6c0adf52eae9a2c1ff6dc31be798178a442e787dbcba69b2e6f464c60377397

SHA512
08702a2139da1f850c674dd55079a28fee22599c419a39c3c8a48b05a5c1419e85b452fa310eb44da223d6093978c1b5c2c62598b98dfb6cc3754beffbc4226f

Download Submit
memory/2336-10-0x0000000002F10000-0x0000000003010000-memory.dmp

Filesize
1024KB

Download
memory/2336-16-0x0000000000400000-0x0000000002CC6000-memory.dmp

Filesize
40.8MB

Download
memory/2336-17-0x0000000000400000-0x0000000002CC6000-memory.dmp

Filesize
40.8MB

Download
memory/3216-9-0x00000000048F0000-0x0000000004903000-memory.dmp

Filesize
76KB

Download
memory/3216-1-0x0000000002F50000-0x0000000003050000-memory.dmp

Filesize
1024KB

Download
memory/3216-8-0x0000000000400000-0x0000000002CC6000-memory.dmp

Filesize
40.8MB

Download
memory/3216-4-0x0000000000400000-0x0000000002CC6000-memory.dmp

Filesize
40.8MB

Download
memory/3216-2-0x00000000048F0000-0x0000000004903000-memory.dmp

Filesize
76KB

Download
memory/3756-11-0x0000000000F30000-0x0000000000F45000-memory.dmp

Filesize
84KB

Download
memory/3756-14-0x0000000000F30000-0x0000000000F45000-memory.dmp

Filesize
84KB

Download
memory/3756-15-0x0000000000F30000-0x0000000000F45000-memory.dmp

Filesize
84KB

Download
memory/3756-18-0x0000000000F30000-0x0000000000F45000-memory.dmp

Filesize
84KB

Download
memory/3756-19-0x0000000000F30000-0x0000000000F45000-memory.dmp

Filesize
84KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads