tofsee | b2801e0865e24eadff5080c1cd3833d47b74e77dfbd58054cdb982d392a0b5b1

General

Target

4b0bc920b6d76b4dfc2c3fd430785b87.exe
Size

11.0MB
MD5

4b0bc920b6d76b4dfc2c3fd430785b87
SHA1

d42e0b3d8e55f6f53ef87ac9fab2b6a6c3c91df0
SHA256

b2801e0865e24eadff5080c1cd3833d47b74e77dfbd58054cdb982d392a0b5b1
SHA512

4edbd0753f2afb747468538d8a4eb17c436cddcc7ce4988dc9f176716d32a95328e1ee528a4d0b0bcc3ca91885620d19c147fa06b34f207481d691ccb1d56ab6
SSDEEP

49152:XNS3S3S3S3S3S3S3S3S3S3S3S3S3S3S3S3S3S3S3S3S3S3S3S3S3S3S3S3S3S3SC:X

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
5040	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\spuqbuek\ImagePath = "C:\\Windows\\SysWOW64\\spuqbuek\\uxdxmxio.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-1-5-21-983843758-932321429-1636175382-1000\Control Panel\International\Geo\Nation	4b0bc920b6d76b4dfc2c3fd430785b87.exe

Deletes itself 1 IoCs

pid	Process
2004	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
4784	uxdxmxio.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4784 set thread context of 2004	4784	uxdxmxio.exe	113

Launches sc.exe 3 IoCs

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

pid	Process
4452	sc.exe
4044	sc.exe
2372	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
2408	3492	WerFault.exe	86
4228	4784	WerFault.exe	106

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 3492 wrote to memory of 4600	3492	4b0bc920b6d76b4dfc2c3fd430785b87.exe	90
PID 3492 wrote to memory of 4600	3492	4b0bc920b6d76b4dfc2c3fd430785b87.exe	90
PID 3492 wrote to memory of 4600	3492	4b0bc920b6d76b4dfc2c3fd430785b87.exe	90
PID 3492 wrote to memory of 1808	3492	4b0bc920b6d76b4dfc2c3fd430785b87.exe	93
PID 3492 wrote to memory of 1808	3492	4b0bc920b6d76b4dfc2c3fd430785b87.exe	93
PID 3492 wrote to memory of 1808	3492	4b0bc920b6d76b4dfc2c3fd430785b87.exe	93
PID 3492 wrote to memory of 4044	3492	4b0bc920b6d76b4dfc2c3fd430785b87.exe	97
PID 3492 wrote to memory of 4044	3492	4b0bc920b6d76b4dfc2c3fd430785b87.exe	97
PID 3492 wrote to memory of 4044	3492	4b0bc920b6d76b4dfc2c3fd430785b87.exe	97
PID 3492 wrote to memory of 2372	3492	4b0bc920b6d76b4dfc2c3fd430785b87.exe	98
PID 3492 wrote to memory of 2372	3492	4b0bc920b6d76b4dfc2c3fd430785b87.exe	98
PID 3492 wrote to memory of 2372	3492	4b0bc920b6d76b4dfc2c3fd430785b87.exe	98
PID 3492 wrote to memory of 4452	3492	4b0bc920b6d76b4dfc2c3fd430785b87.exe	102
PID 3492 wrote to memory of 4452	3492	4b0bc920b6d76b4dfc2c3fd430785b87.exe	102
PID 3492 wrote to memory of 4452	3492	4b0bc920b6d76b4dfc2c3fd430785b87.exe	102
PID 3492 wrote to memory of 5040	3492	4b0bc920b6d76b4dfc2c3fd430785b87.exe	105
PID 3492 wrote to memory of 5040	3492	4b0bc920b6d76b4dfc2c3fd430785b87.exe	105
PID 3492 wrote to memory of 5040	3492	4b0bc920b6d76b4dfc2c3fd430785b87.exe	105
PID 4784 wrote to memory of 2004	4784	uxdxmxio.exe	113
PID 4784 wrote to memory of 2004	4784	uxdxmxio.exe	113
PID 4784 wrote to memory of 2004	4784	uxdxmxio.exe	113
PID 4784 wrote to memory of 2004	4784	uxdxmxio.exe	113
PID 4784 wrote to memory of 2004	4784	uxdxmxio.exe	113

C:\Users\Admin\AppData\Local\Temp\4b0bc920b6d76b4dfc2c3fd430785b87.exe
"C:\Users\Admin\AppData\Local\Temp\4b0bc920b6d76b4dfc2c3fd430785b87.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3492
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\spuqbuek\
  2⤵
  PID:4600
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\uxdxmxio.exe" C:\Windows\SysWOW64\spuqbuek\
  2⤵
  PID:1808
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create spuqbuek binPath= "C:\Windows\SysWOW64\spuqbuek\uxdxmxio.exe /d\"C:\Users\Admin\AppData\Local\Temp\4b0bc920b6d76b4dfc2c3fd430785b87.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:4044
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description spuqbuek "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:2372
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start spuqbuek
  2⤵
  - Launches sc.exe
  PID:4452
- 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:5040
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3492 -s 1052
  2⤵
  - Program crash
  PID:2408

C:\Windows\SysWOW64\spuqbuek\uxdxmxio.exe
C:\Windows\SysWOW64\spuqbuek\uxdxmxio.exe /d"C:\Users\Admin\AppData\Local\Temp\4b0bc920b6d76b4dfc2c3fd430785b87.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4784
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4784 -s 512
  2⤵
  - Program crash
  PID:4228
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  PID:2004

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 3492 -ip 3492
1⤵
PID:3496

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 528 -p 4784 -ip 4784
1⤵
PID:3892

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

Replay Monitor

Loading Replay Monitor...

Downloads

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

Filesize
3.7MB

MD5
6292ab7be9a9d08b92390d7f967c5dfe

SHA1
f5f38c59bc7ab46c4a6fb2d7aa4cc29ec474c6ac

SHA256
2184605261e2198e6d89ce1654c895090a4df5218ab0aaeff1786b056c5d8ede

SHA512
74a609bb660d356940f90ccb0b8a9b1b314255b8b2570f2bccd015f784fe0feb3ba1304187bf338267ca3de981f83dd9e983fe91aa31a7fa8c796e4235c475ba

Download Submit
C:\Windows\SysWOW64\spuqbuek\uxdxmxio.exe

Filesize
1.5MB

MD5
10bd6866f8cd090619e2008de0cec08a

SHA1
23ab50d1b21a1f6c3d1ed9e4046f7c2df9871924

SHA256
1746c158c3b95c2e4a1d0bc9d3839cb5dd930a3b652a78301b263880171ee68e

SHA512
fd9ca5887602ab843c8a933b6185bcd511fbcf79db985b59751f775a2654250a3f177109584c5413eec1c3c198dd57c2e20636852d4bb094b13fa8e44e44a080

Download Submit
memory/2004-14-0x00000000010E0000-0x00000000010F5000-memory.dmp

Filesize
84KB

Download
memory/2004-16-0x00000000010E0000-0x00000000010F5000-memory.dmp

Filesize
84KB

Download
memory/2004-13-0x00000000010E0000-0x00000000010F5000-memory.dmp

Filesize
84KB

Download
memory/2004-10-0x00000000010E0000-0x00000000010F5000-memory.dmp

Filesize
84KB

Download
memory/2004-17-0x00000000010E0000-0x00000000010F5000-memory.dmp

Filesize
84KB

Download
memory/3492-2-0x0000000009630000-0x0000000009643000-memory.dmp

Filesize
76KB

Download
memory/3492-7-0x0000000009630000-0x0000000009643000-memory.dmp

Filesize
76KB

Download
memory/3492-6-0x0000000000400000-0x0000000001400000-memory.dmp

Filesize
16.0MB

Download
memory/3492-1-0x00000000079C0000-0x0000000007AC0000-memory.dmp

Filesize
1024KB

Download
memory/4784-15-0x0000000000400000-0x0000000001400000-memory.dmp

Filesize
16.0MB

Download
memory/4784-9-0x0000000007A40000-0x0000000007B40000-memory.dmp

Filesize
1024KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads