tofsee | 1034116ab8df2f195badd17f38b4628e3ba7251dcd2e62d7dd34bc2c2791eb82

General

Target

abd5bc4c0ae51f1cbff6215bd4c7db1b.exe
Size

11.5MB
MD5

abd5bc4c0ae51f1cbff6215bd4c7db1b
SHA1

78f1c2d2696d42c971f7aac2a5a9e4054ff156c3
SHA256

1034116ab8df2f195badd17f38b4628e3ba7251dcd2e62d7dd34bc2c2791eb82
SHA512

7fbfbeb41c05b7c688b2ca4f9eda3bc6f5a6021f4024c67a647b88c3bbdfec258a3d81540ef951f938689b4aa10e75c697a4533014cd34ddf2426aa7a9949b40
SSDEEP

196608:nrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrL:

Score

10^/10

tofsee evasion persistence trojan

Malware Config

Extracted

Family

tofsee

C2

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 2 TTPs 1 IoCs

evasion

Windows Service

T1543.003

Disable or Modify System Firewall

T1562.004

pid	Process
2376	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\cxntiqvx\ImagePath = "C:\\Windows\\SysWOW64\\cxntiqvx\\sbqlxwdn.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-1-5-21-3270530367-132075249-2153716227-1000\Control Panel\International\Geo\Nation	abd5bc4c0ae51f1cbff6215bd4c7db1b.exe

Deletes itself 1 IoCs

pid	Process
3696	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
1332	sbqlxwdn.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1332 set thread context of 3696	1332	sbqlxwdn.exe	109

Launches sc.exe 3 IoCs

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

pid	Process
2236	sc.exe
1812	sc.exe
5072	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
624	3404	WerFault.exe	88
4276	1332	WerFault.exe	104

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 3404 wrote to memory of 2196	3404	abd5bc4c0ae51f1cbff6215bd4c7db1b.exe	93
PID 3404 wrote to memory of 2196	3404	abd5bc4c0ae51f1cbff6215bd4c7db1b.exe	93
PID 3404 wrote to memory of 2196	3404	abd5bc4c0ae51f1cbff6215bd4c7db1b.exe	93
PID 3404 wrote to memory of 2620	3404	abd5bc4c0ae51f1cbff6215bd4c7db1b.exe	96
PID 3404 wrote to memory of 2620	3404	abd5bc4c0ae51f1cbff6215bd4c7db1b.exe	96
PID 3404 wrote to memory of 2620	3404	abd5bc4c0ae51f1cbff6215bd4c7db1b.exe	96
PID 3404 wrote to memory of 2236	3404	abd5bc4c0ae51f1cbff6215bd4c7db1b.exe	98
PID 3404 wrote to memory of 2236	3404	abd5bc4c0ae51f1cbff6215bd4c7db1b.exe	98
PID 3404 wrote to memory of 2236	3404	abd5bc4c0ae51f1cbff6215bd4c7db1b.exe	98
PID 3404 wrote to memory of 1812	3404	abd5bc4c0ae51f1cbff6215bd4c7db1b.exe	100
PID 3404 wrote to memory of 1812	3404	abd5bc4c0ae51f1cbff6215bd4c7db1b.exe	100
PID 3404 wrote to memory of 1812	3404	abd5bc4c0ae51f1cbff6215bd4c7db1b.exe	100
PID 3404 wrote to memory of 5072	3404	abd5bc4c0ae51f1cbff6215bd4c7db1b.exe	102
PID 3404 wrote to memory of 5072	3404	abd5bc4c0ae51f1cbff6215bd4c7db1b.exe	102
PID 3404 wrote to memory of 5072	3404	abd5bc4c0ae51f1cbff6215bd4c7db1b.exe	102
PID 3404 wrote to memory of 2376	3404	abd5bc4c0ae51f1cbff6215bd4c7db1b.exe	105
PID 3404 wrote to memory of 2376	3404	abd5bc4c0ae51f1cbff6215bd4c7db1b.exe	105
PID 3404 wrote to memory of 2376	3404	abd5bc4c0ae51f1cbff6215bd4c7db1b.exe	105
PID 1332 wrote to memory of 3696	1332	sbqlxwdn.exe	109
PID 1332 wrote to memory of 3696	1332	sbqlxwdn.exe	109
PID 1332 wrote to memory of 3696	1332	sbqlxwdn.exe	109
PID 1332 wrote to memory of 3696	1332	sbqlxwdn.exe	109
PID 1332 wrote to memory of 3696	1332	sbqlxwdn.exe	109

C:\Users\Admin\AppData\Local\Temp\abd5bc4c0ae51f1cbff6215bd4c7db1b.exe
"C:\Users\Admin\AppData\Local\Temp\abd5bc4c0ae51f1cbff6215bd4c7db1b.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3404
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\cxntiqvx\
  2⤵
  PID:2196
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\sbqlxwdn.exe" C:\Windows\SysWOW64\cxntiqvx\
  2⤵
  PID:2620
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create cxntiqvx binPath= "C:\Windows\SysWOW64\cxntiqvx\sbqlxwdn.exe /d\"C:\Users\Admin\AppData\Local\Temp\abd5bc4c0ae51f1cbff6215bd4c7db1b.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:2236
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description cxntiqvx "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:1812
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start cxntiqvx
  2⤵
  - Launches sc.exe
  PID:5072
- 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:2376
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3404 -s 1164
  2⤵
  - Program crash
  PID:624

C:\Windows\SysWOW64\cxntiqvx\sbqlxwdn.exe
C:\Windows\SysWOW64\cxntiqvx\sbqlxwdn.exe /d"C:\Users\Admin\AppData\Local\Temp\abd5bc4c0ae51f1cbff6215bd4c7db1b.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1332
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  PID:3696
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1332 -s 512
  2⤵
  - Program crash
  PID:4276

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 464 -p 3404 -ip 3404
1⤵
PID:2736

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 524 -p 1332 -ip 1332
1⤵
PID:4316

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\sbqlxwdn.exe

Filesize
12.9MB

MD5
4f45cce1553a3b7f0515bd989c054d24

SHA1
a8df74b9218409bcfe334aab1a012f0caf71c2be

SHA256
248ae626a6eeda354433502a542ed8de0cb179ff255535ecbf6d319d0def9c1a

SHA512
a9af7a25a731172b46d8521d3960d5dd7294bf3e49d2d1ade56c7dcf4dd4546b18d67ff25e50b651722c989526237971bce2b50c61b1a1c6de2777182640c54d

Download Submit
memory/1332-10-0x0000000000B40000-0x0000000000C40000-memory.dmp

Filesize
1024KB

Download
memory/1332-13-0x0000000000400000-0x00000000008EB000-memory.dmp

Filesize
4.9MB

Download
memory/3404-4-0x0000000000400000-0x00000000008EB000-memory.dmp

Filesize
4.9MB

Download
memory/3404-2-0x0000000000B90000-0x0000000000BA3000-memory.dmp

Filesize
76KB

Download
memory/3404-7-0x0000000000400000-0x00000000008EB000-memory.dmp

Filesize
4.9MB

Download
memory/3404-8-0x0000000000B90000-0x0000000000BA3000-memory.dmp

Filesize
76KB

Download
memory/3404-1-0x0000000000BD0000-0x0000000000CD0000-memory.dmp

Filesize
1024KB

Download
memory/3696-11-0x00000000003A0000-0x00000000003B5000-memory.dmp

Filesize
84KB

Download
memory/3696-15-0x00000000003A0000-0x00000000003B5000-memory.dmp

Filesize
84KB

Download
memory/3696-16-0x00000000003A0000-0x00000000003B5000-memory.dmp

Filesize
84KB

Download
memory/3696-17-0x00000000003A0000-0x00000000003B5000-memory.dmp

Filesize
84KB

Download
memory/3696-19-0x00000000003A0000-0x00000000003B5000-memory.dmp

Filesize
84KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads