tofsee | 0274ac69e9e961cb0729471460e617ecef53036c04ea8f1c1c02d9ae2fb7d681

Analysis

max time kernel
146s
max time network
146s
platform
windows7_x64
resource
win7-20231129-en
resource tags

arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system
submitted
01/01/2024, 00:07

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General

Target
3b696af7cfd148fd53fcd760e2967ea8.exe
Size 12.4MB
Sample240101-aef9dsbba7
SHA256 0274ac69e9e961cb0729471460e617ecef53036c04ea8f1c1c02d9ae2fb7d681
MD5 3b696af7cfd148fd53fcd760e2967ea8
SHA1 46e39bdb3b160c8f3c1ef5acbc63c63d0198a7fc
SHA512 82e181bb0885d088e225025785f3f5212c4e86985a638de4d72333c6e961e0f5eff72c4159b5668fcac7fd4a5578e23e48ef23ea0ea976b4e55bbc39f4519d21
SSDEEP 24576:ZlxdvCcpOKCtBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBR:ZlzOR
MD5 SHA1 SHA512 SSDEEP

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\pxdwcnci = "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
2696	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\pxdwcnci\ImagePath = "C:\\Windows\\SysWOW64\\pxdwcnci\\btckhuga.exe"	svchost.exe

Deletes itself 1 IoCs

pid	Process
2480	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2564	btckhuga.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2564 set thread context of 2480	2564	btckhuga.exe	41

Launches sc.exe 3 IoCs

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

pid	Process
2712	sc.exe
2104	sc.exe
2608	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 2380 wrote to memory of 1260	2380	3b696af7cfd148fd53fcd760e2967ea8.exe	29
PID 2380 wrote to memory of 1260	2380	3b696af7cfd148fd53fcd760e2967ea8.exe	29
PID 2380 wrote to memory of 1260	2380	3b696af7cfd148fd53fcd760e2967ea8.exe	29
PID 2380 wrote to memory of 1260	2380	3b696af7cfd148fd53fcd760e2967ea8.exe	29
PID 2380 wrote to memory of 3028	2380	3b696af7cfd148fd53fcd760e2967ea8.exe	30
PID 2380 wrote to memory of 3028	2380	3b696af7cfd148fd53fcd760e2967ea8.exe	30
PID 2380 wrote to memory of 3028	2380	3b696af7cfd148fd53fcd760e2967ea8.exe	30
PID 2380 wrote to memory of 3028	2380	3b696af7cfd148fd53fcd760e2967ea8.exe	30
PID 2380 wrote to memory of 2104	2380	3b696af7cfd148fd53fcd760e2967ea8.exe	33
PID 2380 wrote to memory of 2104	2380	3b696af7cfd148fd53fcd760e2967ea8.exe	33
PID 2380 wrote to memory of 2104	2380	3b696af7cfd148fd53fcd760e2967ea8.exe	33
PID 2380 wrote to memory of 2104	2380	3b696af7cfd148fd53fcd760e2967ea8.exe	33
PID 2380 wrote to memory of 2608	2380	3b696af7cfd148fd53fcd760e2967ea8.exe	34
PID 2380 wrote to memory of 2608	2380	3b696af7cfd148fd53fcd760e2967ea8.exe	34
PID 2380 wrote to memory of 2608	2380	3b696af7cfd148fd53fcd760e2967ea8.exe	34
PID 2380 wrote to memory of 2608	2380	3b696af7cfd148fd53fcd760e2967ea8.exe	34
PID 2380 wrote to memory of 2712	2380	3b696af7cfd148fd53fcd760e2967ea8.exe	37
PID 2380 wrote to memory of 2712	2380	3b696af7cfd148fd53fcd760e2967ea8.exe	37
PID 2380 wrote to memory of 2712	2380	3b696af7cfd148fd53fcd760e2967ea8.exe	37
PID 2380 wrote to memory of 2712	2380	3b696af7cfd148fd53fcd760e2967ea8.exe	37
PID 2380 wrote to memory of 2696	2380	3b696af7cfd148fd53fcd760e2967ea8.exe	40
PID 2380 wrote to memory of 2696	2380	3b696af7cfd148fd53fcd760e2967ea8.exe	40
PID 2380 wrote to memory of 2696	2380	3b696af7cfd148fd53fcd760e2967ea8.exe	40
PID 2380 wrote to memory of 2696	2380	3b696af7cfd148fd53fcd760e2967ea8.exe	40
PID 2564 wrote to memory of 2480	2564	btckhuga.exe	41
PID 2564 wrote to memory of 2480	2564	btckhuga.exe	41
PID 2564 wrote to memory of 2480	2564	btckhuga.exe	41
PID 2564 wrote to memory of 2480	2564	btckhuga.exe	41
PID 2564 wrote to memory of 2480	2564	btckhuga.exe	41
PID 2564 wrote to memory of 2480	2564	btckhuga.exe	41

C:\Users\Admin\AppData\Local\Temp\3b696af7cfd148fd53fcd760e2967ea8.exe
"C:\Users\Admin\AppData\Local\Temp\3b696af7cfd148fd53fcd760e2967ea8.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:2380
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\pxdwcnci\
  2⤵
  PID:1260
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\btckhuga.exe" C:\Windows\SysWOW64\pxdwcnci\
  2⤵
  PID:3028
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create pxdwcnci binPath= "C:\Windows\SysWOW64\pxdwcnci\btckhuga.exe /d\"C:\Users\Admin\AppData\Local\Temp\3b696af7cfd148fd53fcd760e2967ea8.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:2104
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description pxdwcnci "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:2608
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start pxdwcnci
  2⤵
  - Launches sc.exe
  PID:2712
- 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:2696

C:\Windows\SysWOW64\pxdwcnci\btckhuga.exe
C:\Windows\SysWOW64\pxdwcnci\btckhuga.exe /d"C:\Users\Admin\AppData\Local\Temp\3b696af7cfd148fd53fcd760e2967ea8.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2564
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Windows security bypass
  - Sets service image path in registry
  - Deletes itself
  PID:2480

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

memory/2380-4-0x0000000000400000-0x0000000000468000-memory.dmp

Download

memory/2380-3-0x0000000000220000-0x0000000000233000-memory.dmp

Download

memory/2380-1-0x0000000000570000-0x0000000000670000-memory.dmp

Download

memory/2380-8-0x0000000000400000-0x0000000000468000-memory.dmp

Download

memory/2480-10-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Download

memory/2480-9-0x0000000000090000-0x00000000000A5000-memory.dmp

Download

memory/2480-19-0x0000000000090000-0x00000000000A5000-memory.dmp

Download

memory/2480-20-0x0000000000090000-0x00000000000A5000-memory.dmp

Download

memory/2480-12-0x0000000000090000-0x00000000000A5000-memory.dmp

Download

memory/2480-21-0x0000000000090000-0x00000000000A5000-memory.dmp

Download

memory/2564-14-0x0000000000570000-0x0000000000670000-memory.dmp

Download

memory/2564-15-0x0000000000400000-0x0000000000468000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads