tofsee | 2c82e9c61a9213ce1a25357b667d6929772bc8ad4324db38e8dd7f00c00eacc6

Analysis

max time kernel
82s
max time network
82s
platform
windows10-1703_x64
resource
win10-20240404-en
resource tags

arch:x64arch:x86image:win10-20240404-enlocale:en-usos:windows10-1703-x64system
submitted
25/04/2024, 03:17

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General

Target
pukix.exe
Size 1.0MB
Sample240425-ds446aec65
SHA256 2c82e9c61a9213ce1a25357b667d6929772bc8ad4324db38e8dd7f00c00eacc6
MD5 7c93e4041e21ef8e4d45f7343abcae94
SHA1 146bc0e573b4dca3f38c147477e6c7fcabe536b3
SHA512 75903fabcf9c645f5caad2494c677d8e7e3c7a1d8a39e400fa8aea685d32e3253f0ce0423af4dba99a7e5a054b69ef48b5475d814de539574b2192794fcfedda
SSDEEP 24576:ykMXdjSpUjdjKIDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDr:yBXhSq1PDDDDDDDDDDDDDDDDDDDDDDD7
MD5 SHA1 SHA512 SSDEEP

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\yeezwepu = "0"	svchost.exe

Creates new service(s) 1 TTPs
persistence

Windows Service
T1543.003

Modifies Windows Firewall 2 TTPs 1 IoCs

evasion

Windows Service

T1543.003

Disable or Modify System Firewall

T1562.004

pid	Process
4704	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\yeezwepu\ImagePath = "C:\\Windows\\SysWOW64\\yeezwepu\\oxrwonie.exe"	svchost.exe

Deletes itself 1 IoCs

pid	Process
4568	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
4112	oxrwonie.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4112 set thread context of 4568	4112	oxrwonie.exe	84

Launches sc.exe 3 IoCs

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

pid	Process
960	sc.exe
3492	sc.exe
4160	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 23 IoCs

description	pid	Process	procid_target
PID 1612 wrote to memory of 2936	1612	pukix.exe	72
PID 1612 wrote to memory of 2936	1612	pukix.exe	72
PID 1612 wrote to memory of 2936	1612	pukix.exe	72
PID 1612 wrote to memory of 1472	1612	pukix.exe	74
PID 1612 wrote to memory of 1472	1612	pukix.exe	74
PID 1612 wrote to memory of 1472	1612	pukix.exe	74
PID 1612 wrote to memory of 4160	1612	pukix.exe	76
PID 1612 wrote to memory of 4160	1612	pukix.exe	76
PID 1612 wrote to memory of 4160	1612	pukix.exe	76
PID 1612 wrote to memory of 960	1612	pukix.exe	78
PID 1612 wrote to memory of 960	1612	pukix.exe	78
PID 1612 wrote to memory of 960	1612	pukix.exe	78
PID 1612 wrote to memory of 3492	1612	pukix.exe	80
PID 1612 wrote to memory of 3492	1612	pukix.exe	80
PID 1612 wrote to memory of 3492	1612	pukix.exe	80
PID 1612 wrote to memory of 4704	1612	pukix.exe	83
PID 1612 wrote to memory of 4704	1612	pukix.exe	83
PID 1612 wrote to memory of 4704	1612	pukix.exe	83
PID 4112 wrote to memory of 4568	4112	oxrwonie.exe	84
PID 4112 wrote to memory of 4568	4112	oxrwonie.exe	84
PID 4112 wrote to memory of 4568	4112	oxrwonie.exe	84
PID 4112 wrote to memory of 4568	4112	oxrwonie.exe	84
PID 4112 wrote to memory of 4568	4112	oxrwonie.exe	84

C:\Users\Admin\AppData\Local\Temp\pukix.exe
"C:\Users\Admin\AppData\Local\Temp\pukix.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:1612
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\yeezwepu\
  2⤵
  PID:2936
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\oxrwonie.exe" C:\Windows\SysWOW64\yeezwepu\
  2⤵
  PID:1472
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create yeezwepu binPath= "C:\Windows\SysWOW64\yeezwepu\oxrwonie.exe /d\"C:\Users\Admin\AppData\Local\Temp\pukix.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:4160
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description yeezwepu "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:960
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start yeezwepu
  2⤵
  - Launches sc.exe
  PID:3492
- 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:4704

C:\Windows\SysWOW64\yeezwepu\oxrwonie.exe
C:\Windows\SysWOW64\yeezwepu\oxrwonie.exe /d"C:\Users\Admin\AppData\Local\Temp\pukix.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4112
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Windows security bypass
  - Sets service image path in registry
  - Deletes itself
  PID:4568

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 System Firewall

T1562.004

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

oxrwonie.exe

Path C:\Users\Admin\AppData\Local\Temp\oxrwonie.exe
Size 13.2MB
SHA256 3798d1b47a1556fa4e55f9ecf6bc26e4816d638af52ab1157b853cdbb2695a50
MD5 8c05b1cc06671e81fa626df8589fc530
SHA1 a42407db82fe691ac9d8bdb3e34ddc6813391ca6
SHA512 a8b120fb005be8616b155c006563a682acefde3ce70b512cb5729af7fe6052615927d2cef7e057ab1a54fcaf9b8631547455a4b7a2c18795e629e001e5c85c59
SSDEEP 49152:7BXhSq1PDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDT:7BXMq
MD5 SHA1 SHA512 SSDEEP

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memory/1612-12-0x0000000000400000-0x000000000046C000-memory.dmp

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memory/1612-1-0x00000000005B0000-0x00000000006B0000-memory.dmp

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memory/1612-2-0x0000000002050000-0x0000000002063000-memory.dmp

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memory/1612-4-0x0000000000400000-0x000000000046C000-memory.dmp

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memory/4112-10-0x0000000000400000-0x000000000046C000-memory.dmp

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memory/4112-9-0x00000000006C0000-0x00000000006D3000-memory.dmp

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memory/4112-8-0x0000000000750000-0x0000000000850000-memory.dmp

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memory/4112-15-0x0000000000400000-0x000000000046C000-memory.dmp

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memory/4568-11-0x0000000003000000-0x0000000003015000-memory.dmp

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memory/4568-17-0x0000000003000000-0x0000000003015000-memory.dmp

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memory/4568-18-0x0000000003000000-0x0000000003015000-memory.dmp

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memory/4568-19-0x0000000003000000-0x0000000003015000-memory.dmp

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memory/4568-20-0x0000000003000000-0x0000000003015000-memory.dmp

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memory/4568-21-0x0000000003000000-0x0000000003015000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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