tofsee | c427b8b15e5dca67b4b7c9fec0e4a7a461532bec32d38f47fba213c905ab731e

Analysis

max time kernel
151s
max time network
137s
platform
windows7_x64
resource
win7-20231215-en
resource tags

arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
submitted
06-01-2024 22:47

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General

Target

475dc421b8cf3050201ecf759cc19844.exe
Size

11.9MB
MD5

475dc421b8cf3050201ecf759cc19844
SHA1

eef39480edb6de6651af025696ee8f6cfcc9d250
SHA256

c427b8b15e5dca67b4b7c9fec0e4a7a461532bec32d38f47fba213c905ab731e
SHA512

69c7a9cd274167984c38fa917c0d7c97ef914330dd67f2e2f0797fb65919525567de46791d4f0cfffebbdd3f2bdb2767827fec6e5f49e800f0fa8ffde8f08065
SSDEEP

49152:fyjfVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVV9:

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\egsjwfkr = "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\egsjwfkr\ImagePath = "C:\\Windows\\SysWOW64\\egsjwfkr\\glvqkwtv.exe"	svchost.exe

Deletes itself 1 IoCs

pid	Process
2412	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2616	glvqkwtv.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2616 set thread context of 2412	2616	glvqkwtv.exe	41

Launches sc.exe 3 IoCs

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

pid	Process
2856	sc.exe
2280	sc.exe
2932	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 1288 wrote to memory of 2392	1288	475dc421b8cf3050201ecf759cc19844.exe	29
PID 1288 wrote to memory of 2392	1288	475dc421b8cf3050201ecf759cc19844.exe	29
PID 1288 wrote to memory of 2392	1288	475dc421b8cf3050201ecf759cc19844.exe	29
PID 1288 wrote to memory of 2392	1288	475dc421b8cf3050201ecf759cc19844.exe	29
PID 1288 wrote to memory of 2784	1288	475dc421b8cf3050201ecf759cc19844.exe	31
PID 1288 wrote to memory of 2784	1288	475dc421b8cf3050201ecf759cc19844.exe	31
PID 1288 wrote to memory of 2784	1288	475dc421b8cf3050201ecf759cc19844.exe	31
PID 1288 wrote to memory of 2784	1288	475dc421b8cf3050201ecf759cc19844.exe	31
PID 1288 wrote to memory of 2856	1288	475dc421b8cf3050201ecf759cc19844.exe	33
PID 1288 wrote to memory of 2856	1288	475dc421b8cf3050201ecf759cc19844.exe	33
PID 1288 wrote to memory of 2856	1288	475dc421b8cf3050201ecf759cc19844.exe	33
PID 1288 wrote to memory of 2856	1288	475dc421b8cf3050201ecf759cc19844.exe	33
PID 1288 wrote to memory of 2280	1288	475dc421b8cf3050201ecf759cc19844.exe	35
PID 1288 wrote to memory of 2280	1288	475dc421b8cf3050201ecf759cc19844.exe	35
PID 1288 wrote to memory of 2280	1288	475dc421b8cf3050201ecf759cc19844.exe	35
PID 1288 wrote to memory of 2280	1288	475dc421b8cf3050201ecf759cc19844.exe	35
PID 1288 wrote to memory of 2932	1288	475dc421b8cf3050201ecf759cc19844.exe	37
PID 1288 wrote to memory of 2932	1288	475dc421b8cf3050201ecf759cc19844.exe	37
PID 1288 wrote to memory of 2932	1288	475dc421b8cf3050201ecf759cc19844.exe	37
PID 1288 wrote to memory of 2932	1288	475dc421b8cf3050201ecf759cc19844.exe	37
PID 1288 wrote to memory of 2696	1288	475dc421b8cf3050201ecf759cc19844.exe	38
PID 1288 wrote to memory of 2696	1288	475dc421b8cf3050201ecf759cc19844.exe	38
PID 1288 wrote to memory of 2696	1288	475dc421b8cf3050201ecf759cc19844.exe	38
PID 1288 wrote to memory of 2696	1288	475dc421b8cf3050201ecf759cc19844.exe	38
PID 2616 wrote to memory of 2412	2616	glvqkwtv.exe	41
PID 2616 wrote to memory of 2412	2616	glvqkwtv.exe	41
PID 2616 wrote to memory of 2412	2616	glvqkwtv.exe	41
PID 2616 wrote to memory of 2412	2616	glvqkwtv.exe	41
PID 2616 wrote to memory of 2412	2616	glvqkwtv.exe	41
PID 2616 wrote to memory of 2412	2616	glvqkwtv.exe	41

C:\Users\Admin\AppData\Local\Temp\475dc421b8cf3050201ecf759cc19844.exe
"C:\Users\Admin\AppData\Local\Temp\475dc421b8cf3050201ecf759cc19844.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:1288
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\egsjwfkr\
  2⤵
  PID:2392
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\glvqkwtv.exe" C:\Windows\SysWOW64\egsjwfkr\
  2⤵
  PID:2784
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create egsjwfkr binPath= "C:\Windows\SysWOW64\egsjwfkr\glvqkwtv.exe /d\"C:\Users\Admin\AppData\Local\Temp\475dc421b8cf3050201ecf759cc19844.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:2856
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description egsjwfkr "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:2280
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start egsjwfkr
  2⤵
  - Launches sc.exe
  PID:2932
- 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\egsjwfkr\glvqkwtv.exe
C:\Windows\SysWOW64\egsjwfkr\glvqkwtv.exe /d"C:\Users\Admin\AppData\Local\Temp\475dc421b8cf3050201ecf759cc19844.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2616
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Windows security bypass
  - Sets service image path in registry
  - Deletes itself
  PID:2412

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\glvqkwtv.exe

Filesize
1.9MB

MD5
4a002e0e739ab9ce8dde28fc837fdf2f

SHA1
40f0ca3e0c4c458146cadfae25467346512528ac

SHA256
72e0466675069d25d2dd7c3b2bacf44fdaf49b3bf7005d6fc8ae60c19ae70fc1

SHA512
e2b99aaf224f7ae1905386f7189c2973c641ced742ea56b0a49e452a27eff2c7c31b91e238f02556067cda859503847ca087954b31304d52fc333a4ef08453de

Download Submit
memory/1288-1-0x0000000000DC0000-0x0000000000EC0000-memory.dmp

Filesize
1024KB

Download
memory/1288-2-0x0000000000020000-0x0000000000033000-memory.dmp

Filesize
76KB

Download
memory/1288-4-0x0000000000400000-0x0000000000C18000-memory.dmp

Filesize
8.1MB

Download
memory/1288-6-0x0000000000400000-0x0000000000C18000-memory.dmp

Filesize
8.1MB

Download
memory/1288-7-0x0000000000020000-0x0000000000033000-memory.dmp

Filesize
76KB

Download
memory/2412-10-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download
memory/2412-15-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download
memory/2412-20-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download
memory/2412-21-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download
memory/2412-12-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2412-22-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download
memory/2616-11-0x0000000000D10000-0x0000000000E10000-memory.dmp

Filesize
1024KB

Download
memory/2616-14-0x0000000000400000-0x0000000000C18000-memory.dmp

Filesize
8.1MB

Download
memory/2616-17-0x0000000000400000-0x0000000000C18000-memory.dmp

Filesize
8.1MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads