tofsee | 2c6b75279ea27028b0ab8d89267d946d71351b1b12551916fea44de3768457b5

Analysis

max time kernel
150s
max time network
126s
platform
windows7_x64
resource
win7-20231023-en
resource tags

arch:x64arch:x86image:win7-20231023-enlocale:en-usos:windows7-x64system
submitted
14/11/2023, 18:50

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General

Target

2c6b75279ea27028b0ab8d89267d946d71351b1b12551916fea44de3768457b5.exe
Size

11.9MB
MD5

dbc4c254ab5fd77f0be8a8a08261ca49
SHA1

4dfb89d495a3b568e7c2f1b36c69ca1cefaffc4d
SHA256

2c6b75279ea27028b0ab8d89267d946d71351b1b12551916fea44de3768457b5
SHA512

952b2f3238494895eb2de48c8005eb7489024361f4601590b1a9e62e8594698ab957ab292dfd7969d8234e03cfb480194f1b7dd37e814a23ecf19d3e39c67edf
SSDEEP

3072:c8X2oAKtZZy2m4zRwhIuGikP32xGe7pppppppppppppppppppppppppppppppppr:c8mKtDyv4lwh8W

Score

10^/10

tofsee evasion persistence trojan

Malware Config

Extracted

Family

tofsee

43.231.4.7

lazystax.ru

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\fyfkqnsx = "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
2772	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\fyfkqnsx\ImagePath = "C:\\Windows\\SysWOW64\\fyfkqnsx\\bxrxdfxo.exe"	svchost.exe

Deletes itself 1 IoCs

pid	Process
2528	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2604	bxrxdfxo.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2604 set thread context of 2528	2604	bxrxdfxo.exe	41

Launches sc.exe 3 IoCs

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

pid	Process
2852	sc.exe
2700	sc.exe
2640	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 2280 wrote to memory of 2912	2280	2c6b75279ea27028b0ab8d89267d946d71351b1b12551916fea44de3768457b5.exe	28
PID 2280 wrote to memory of 2912	2280	2c6b75279ea27028b0ab8d89267d946d71351b1b12551916fea44de3768457b5.exe	28
PID 2280 wrote to memory of 2912	2280	2c6b75279ea27028b0ab8d89267d946d71351b1b12551916fea44de3768457b5.exe	28
PID 2280 wrote to memory of 2912	2280	2c6b75279ea27028b0ab8d89267d946d71351b1b12551916fea44de3768457b5.exe	28
PID 2280 wrote to memory of 2976	2280	2c6b75279ea27028b0ab8d89267d946d71351b1b12551916fea44de3768457b5.exe	30
PID 2280 wrote to memory of 2976	2280	2c6b75279ea27028b0ab8d89267d946d71351b1b12551916fea44de3768457b5.exe	30
PID 2280 wrote to memory of 2976	2280	2c6b75279ea27028b0ab8d89267d946d71351b1b12551916fea44de3768457b5.exe	30
PID 2280 wrote to memory of 2976	2280	2c6b75279ea27028b0ab8d89267d946d71351b1b12551916fea44de3768457b5.exe	30
PID 2280 wrote to memory of 2852	2280	2c6b75279ea27028b0ab8d89267d946d71351b1b12551916fea44de3768457b5.exe	32
PID 2280 wrote to memory of 2852	2280	2c6b75279ea27028b0ab8d89267d946d71351b1b12551916fea44de3768457b5.exe	32
PID 2280 wrote to memory of 2852	2280	2c6b75279ea27028b0ab8d89267d946d71351b1b12551916fea44de3768457b5.exe	32
PID 2280 wrote to memory of 2852	2280	2c6b75279ea27028b0ab8d89267d946d71351b1b12551916fea44de3768457b5.exe	32
PID 2280 wrote to memory of 2700	2280	2c6b75279ea27028b0ab8d89267d946d71351b1b12551916fea44de3768457b5.exe	34
PID 2280 wrote to memory of 2700	2280	2c6b75279ea27028b0ab8d89267d946d71351b1b12551916fea44de3768457b5.exe	34
PID 2280 wrote to memory of 2700	2280	2c6b75279ea27028b0ab8d89267d946d71351b1b12551916fea44de3768457b5.exe	34
PID 2280 wrote to memory of 2700	2280	2c6b75279ea27028b0ab8d89267d946d71351b1b12551916fea44de3768457b5.exe	34
PID 2280 wrote to memory of 2640	2280	2c6b75279ea27028b0ab8d89267d946d71351b1b12551916fea44de3768457b5.exe	36
PID 2280 wrote to memory of 2640	2280	2c6b75279ea27028b0ab8d89267d946d71351b1b12551916fea44de3768457b5.exe	36
PID 2280 wrote to memory of 2640	2280	2c6b75279ea27028b0ab8d89267d946d71351b1b12551916fea44de3768457b5.exe	36
PID 2280 wrote to memory of 2640	2280	2c6b75279ea27028b0ab8d89267d946d71351b1b12551916fea44de3768457b5.exe	36
PID 2280 wrote to memory of 2772	2280	2c6b75279ea27028b0ab8d89267d946d71351b1b12551916fea44de3768457b5.exe	38
PID 2280 wrote to memory of 2772	2280	2c6b75279ea27028b0ab8d89267d946d71351b1b12551916fea44de3768457b5.exe	38
PID 2280 wrote to memory of 2772	2280	2c6b75279ea27028b0ab8d89267d946d71351b1b12551916fea44de3768457b5.exe	38
PID 2280 wrote to memory of 2772	2280	2c6b75279ea27028b0ab8d89267d946d71351b1b12551916fea44de3768457b5.exe	38
PID 2604 wrote to memory of 2528	2604	bxrxdfxo.exe	41
PID 2604 wrote to memory of 2528	2604	bxrxdfxo.exe	41
PID 2604 wrote to memory of 2528	2604	bxrxdfxo.exe	41
PID 2604 wrote to memory of 2528	2604	bxrxdfxo.exe	41
PID 2604 wrote to memory of 2528	2604	bxrxdfxo.exe	41
PID 2604 wrote to memory of 2528	2604	bxrxdfxo.exe	41

C:\Users\Admin\AppData\Local\Temp\2c6b75279ea27028b0ab8d89267d946d71351b1b12551916fea44de3768457b5.exe
"C:\Users\Admin\AppData\Local\Temp\2c6b75279ea27028b0ab8d89267d946d71351b1b12551916fea44de3768457b5.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:2280
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\fyfkqnsx\
  2⤵
  PID:2912
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\bxrxdfxo.exe" C:\Windows\SysWOW64\fyfkqnsx\
  2⤵
  PID:2976
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create fyfkqnsx binPath= "C:\Windows\SysWOW64\fyfkqnsx\bxrxdfxo.exe /d\"C:\Users\Admin\AppData\Local\Temp\2c6b75279ea27028b0ab8d89267d946d71351b1b12551916fea44de3768457b5.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:2852
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description fyfkqnsx "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:2700
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start fyfkqnsx
  2⤵
  - Launches sc.exe
  PID:2640
- 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:2772

C:\Windows\SysWOW64\fyfkqnsx\bxrxdfxo.exe
C:\Windows\SysWOW64\fyfkqnsx\bxrxdfxo.exe /d"C:\Users\Admin\AppData\Local\Temp\2c6b75279ea27028b0ab8d89267d946d71351b1b12551916fea44de3768457b5.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2604
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Windows security bypass
  - Sets service image path in registry
  - Deletes itself
  PID:2528

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\bxrxdfxo.exe

Filesize
13.2MB

MD5
cbbc6ed97747b5be1340bd6c80a1efcb

SHA1
864221bcd609d3ed24aeffacf5aa99c0e4a0b605

SHA256
2668621271566dbd74ca08aef5fbc2f288f2a92389f274a29d6d62e200a18c8d

SHA512
2a62bea5c5ec9ab5689197946c8e46a16e09018aa983ce861b847fa431f6549cb1c729d2de7d74aeaf0806ed836c779400238ba4ff60d3e1511d17947f16f910

Download Submit
C:\Windows\SysWOW64\fyfkqnsx\bxrxdfxo.exe

Filesize
13.2MB

MD5
cbbc6ed97747b5be1340bd6c80a1efcb

SHA1
864221bcd609d3ed24aeffacf5aa99c0e4a0b605

SHA256
2668621271566dbd74ca08aef5fbc2f288f2a92389f274a29d6d62e200a18c8d

SHA512
2a62bea5c5ec9ab5689197946c8e46a16e09018aa983ce861b847fa431f6549cb1c729d2de7d74aeaf0806ed836c779400238ba4ff60d3e1511d17947f16f910

Download Submit
memory/2280-1-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download
memory/2280-0-0x0000000000260000-0x0000000000261000-memory.dmp

Filesize
4KB

Download
memory/2280-2-0x0000000000280000-0x0000000000281000-memory.dmp

Filesize
4KB

Download
memory/2280-5-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download
memory/2528-10-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2528-9-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download
memory/2528-12-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download
memory/2528-16-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download
memory/2528-17-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download
memory/2528-18-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download
memory/2604-7-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download
memory/2604-8-0x0000000000270000-0x0000000000271000-memory.dmp

Filesize
4KB

Download
memory/2604-13-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads