tofsee | 38d1de62b07f072de9aab3a81d82d3066eadf97a016504e7188864f29328b6c2

Analysis

max time kernel
150s
max time network
155s
platform
windows7_x64
resource
win7-20231215-en
resource tags

arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
submitted
01/01/2024, 06:47

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General

Target

3c29b2a85beb671f0504afc7c3e1346a.exe
Size

12.5MB
MD5

3c29b2a85beb671f0504afc7c3e1346a
SHA1

4db3c724d1d4377bcb85ed2d625ef23867308ce9
SHA256

38d1de62b07f072de9aab3a81d82d3066eadf97a016504e7188864f29328b6c2
SHA512

89668f1629ea80ec2ebe9e754327abd34bb2b4ffbe75afdf4fe0c50a3e0198f64bf8b8fd95a9752254bc998e751edef0db9a7cf148a5c96946c98bba3cd9311f
SSDEEP

24576:ojDuKnh7YzbKBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBB3:onh

Score

10^/10

tofsee evasion persistence trojan

Malware Config

Extracted

Family

tofsee

defeatwax.ru

refabyd.info

Signatures

Tofsee
Backdoor/botnet which carries out malicious activities based on commands from a C2 server.
trojan tofsee

Windows security bypass 2 TTPs 1 IoCs

evasion trojan

Disable or Modify Tools

T1562.001

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths\C:\Windows\SysWOW64\lnlfrhnc = "0"	svchost.exe

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
2760	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\lnlfrhnc\ImagePath = "C:\\Windows\\SysWOW64\\lnlfrhnc\\huusrsff.exe"	svchost.exe

Deletes itself 1 IoCs

pid	Process
2144	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2972	huusrsff.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2972 set thread context of 2144	2972	huusrsff.exe	41

Launches sc.exe 3 IoCs

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

pid	Process
3032	sc.exe
2296	sc.exe
2828	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 30 IoCs

description	pid	Process	procid_target
PID 2088 wrote to memory of 2444	2088	3c29b2a85beb671f0504afc7c3e1346a.exe	28
PID 2088 wrote to memory of 2444	2088	3c29b2a85beb671f0504afc7c3e1346a.exe	28
PID 2088 wrote to memory of 2444	2088	3c29b2a85beb671f0504afc7c3e1346a.exe	28
PID 2088 wrote to memory of 2444	2088	3c29b2a85beb671f0504afc7c3e1346a.exe	28
PID 2088 wrote to memory of 2852	2088	3c29b2a85beb671f0504afc7c3e1346a.exe	31
PID 2088 wrote to memory of 2852	2088	3c29b2a85beb671f0504afc7c3e1346a.exe	31
PID 2088 wrote to memory of 2852	2088	3c29b2a85beb671f0504afc7c3e1346a.exe	31
PID 2088 wrote to memory of 2852	2088	3c29b2a85beb671f0504afc7c3e1346a.exe	31
PID 2088 wrote to memory of 3032	2088	3c29b2a85beb671f0504afc7c3e1346a.exe	32
PID 2088 wrote to memory of 3032	2088	3c29b2a85beb671f0504afc7c3e1346a.exe	32
PID 2088 wrote to memory of 3032	2088	3c29b2a85beb671f0504afc7c3e1346a.exe	32
PID 2088 wrote to memory of 3032	2088	3c29b2a85beb671f0504afc7c3e1346a.exe	32
PID 2088 wrote to memory of 2296	2088	3c29b2a85beb671f0504afc7c3e1346a.exe	34
PID 2088 wrote to memory of 2296	2088	3c29b2a85beb671f0504afc7c3e1346a.exe	34
PID 2088 wrote to memory of 2296	2088	3c29b2a85beb671f0504afc7c3e1346a.exe	34
PID 2088 wrote to memory of 2296	2088	3c29b2a85beb671f0504afc7c3e1346a.exe	34
PID 2088 wrote to memory of 2828	2088	3c29b2a85beb671f0504afc7c3e1346a.exe	36
PID 2088 wrote to memory of 2828	2088	3c29b2a85beb671f0504afc7c3e1346a.exe	36
PID 2088 wrote to memory of 2828	2088	3c29b2a85beb671f0504afc7c3e1346a.exe	36
PID 2088 wrote to memory of 2828	2088	3c29b2a85beb671f0504afc7c3e1346a.exe	36
PID 2088 wrote to memory of 2760	2088	3c29b2a85beb671f0504afc7c3e1346a.exe	39
PID 2088 wrote to memory of 2760	2088	3c29b2a85beb671f0504afc7c3e1346a.exe	39
PID 2088 wrote to memory of 2760	2088	3c29b2a85beb671f0504afc7c3e1346a.exe	39
PID 2088 wrote to memory of 2760	2088	3c29b2a85beb671f0504afc7c3e1346a.exe	39
PID 2972 wrote to memory of 2144	2972	huusrsff.exe	41
PID 2972 wrote to memory of 2144	2972	huusrsff.exe	41
PID 2972 wrote to memory of 2144	2972	huusrsff.exe	41
PID 2972 wrote to memory of 2144	2972	huusrsff.exe	41
PID 2972 wrote to memory of 2144	2972	huusrsff.exe	41
PID 2972 wrote to memory of 2144	2972	huusrsff.exe	41

C:\Users\Admin\AppData\Local\Temp\3c29b2a85beb671f0504afc7c3e1346a.exe
"C:\Users\Admin\AppData\Local\Temp\3c29b2a85beb671f0504afc7c3e1346a.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:2088
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\lnlfrhnc\
  2⤵
  PID:2444
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\huusrsff.exe" C:\Windows\SysWOW64\lnlfrhnc\
  2⤵
  PID:2852
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create lnlfrhnc binPath= "C:\Windows\SysWOW64\lnlfrhnc\huusrsff.exe /d\"C:\Users\Admin\AppData\Local\Temp\3c29b2a85beb671f0504afc7c3e1346a.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:3032
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description lnlfrhnc "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:2296
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start lnlfrhnc
  2⤵
  - Launches sc.exe
  PID:2828
- 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:2760

C:\Windows\SysWOW64\lnlfrhnc\huusrsff.exe
C:\Windows\SysWOW64\lnlfrhnc\huusrsff.exe /d"C:\Users\Admin\AppData\Local\Temp\3c29b2a85beb671f0504afc7c3e1346a.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2972
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Windows security bypass
  - Sets service image path in registry
  - Deletes itself
  PID:2144

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Create or Modify System Process

T1543

Windows Service

T1543.003

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Create or Modify System Process

T1543

Windows Service

T1543.003

Defense Evasion

Impair Defenses

T1562

Disable or Modify Tools

T1562.001

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

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

Filesize
14.3MB

MD5
af2779b69c30e3856cb31a6d147eb8e9

SHA1
90a38551b45cd7ed3227c87507cf903720c85448

SHA256
9214ce565c7384591227e220dcf44fb670ed33b9c6e1aacef1ebc14737e795a0

SHA512
37fdeaf46b49a574a13da2d36178b4a0463d2b7ed4bff4c2d98ea5f36f9fa034888fa11dd18e873c1134dedf0eecf36274cb13f7451ef3f8ce94610a75352ebe

Download Submit
memory/2088-2-0x0000000000220000-0x0000000000233000-memory.dmp

Filesize
76KB

Download
memory/2088-1-0x00000000008B0000-0x00000000009B0000-memory.dmp

Filesize
1024KB

Download
memory/2088-4-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/2088-8-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/2144-14-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2144-12-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2144-11-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2144-19-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2144-18-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2144-20-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2144-21-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2972-10-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/2972-9-0x00000000002B0000-0x00000000003B0000-memory.dmp

Filesize
1024KB

Download
memory/2972-15-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads