d489414b287a09d2351b59599fbb4fb4bf4532f633e6779006d24d2de3173c5c

Analysis

max time kernel
144s
max time network
146s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
13/03/2024, 20:48

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General

Target
c6d31db7249368ded701b4f2e2b03988.exe
Size 34KB
Sample240313-zlsnfaae49
SHA256 d489414b287a09d2351b59599fbb4fb4bf4532f633e6779006d24d2de3173c5c
MD5 c6d31db7249368ded701b4f2e2b03988
SHA1 ed0afccaf18f7b6d10db91e95f35689247259510
SHA512 c7651b0c5350b4382453c8b0b2403bb04282446b75a17487b046f43f7e89e6da933b60ea2f33163acd6ad7fd887cc6a9c3e47b0d6b5d5a20bfc6f07ef844f966
SSDEEP 768:4PVcCoacCxrhDV1h6NkVSQAWyBdo4fKORN3xudeVA:49cCJhByQAjdo4yOgR
MD5 SHA1 SHA512 SSDEEP

Score

6^/10

persistence

Malware Config

Signatures

Modifies WinLogon 2 TTPs 6 IoCs

persistence

Winlogon Helper DLL

T1547.004

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify\WLogon	c6d31db7249368ded701b4f2e2b03988.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify	c6d31db7249368ded701b4f2e2b03988.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify\WLogon\Asynchronous = "1"	c6d31db7249368ded701b4f2e2b03988.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify\WLogon\Impersonate = "1"	c6d31db7249368ded701b4f2e2b03988.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify\WLogon\StartShell = "Entry"	c6d31db7249368ded701b4f2e2b03988.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify\WLogon\DllName = "srvc.dll"	c6d31db7249368ded701b4f2e2b03988.exe

Drops file in System32 directory 1 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\srvc.dll	c6d31db7249368ded701b4f2e2b03988.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
4556	c6d31db7249368ded701b4f2e2b03988.exe
4556	c6d31db7249368ded701b4f2e2b03988.exe

Suspicious use of WriteProcessMemory 1 IoCs

description	pid	Process	procid_target
PID 4556 wrote to memory of 3448	4556	c6d31db7249368ded701b4f2e2b03988.exe	57

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
PID:3448
- C:\Users\Admin\AppData\Local\Temp\c6d31db7249368ded701b4f2e2b03988.exe
  "C:\Users\Admin\AppData\Local\Temp\c6d31db7249368ded701b4f2e2b03988.exe"
  2⤵
  - Modifies WinLogon
  - Drops file in System32 directory
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:4556

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Winlogon Helper DLL

T1547.004

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Winlogon Helper DLL

T1547.004

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/4556-0-0x0000000000400000-0x0000000000414000-memory.dmp

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memory/4556-2-0x0000000000400000-0x0000000000414000-memory.dmp

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