b595e9f4106b2f7ef8c9af5e5110659e236d3d81266283f62dc25c3eb7bc6782

Analysis

max time kernel
35s
max time network
36s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
20-09-2024 19:14

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General

Target

b595e9f4106b2f7ef8c9af5e5110659e236d3d81266283f62dc25c3eb7bc6782.exe
Size

349KB
MD5

c4cb5c39de0044aa65fb2b3ea8263431
SHA1

0588d5b102526548095bf27645fc263161bce6e0
SHA256

b595e9f4106b2f7ef8c9af5e5110659e236d3d81266283f62dc25c3eb7bc6782
SHA512

c84f27e86b82b2a19951ae58add524665131e5b93bff1402a7c477bbf314a2c2b3b63256d5b41cb54d15e318ce3f9b82a86f3a2b9543b7b9a8ed1a9db0cf0785
SSDEEP

6144:EVTQbSiexKAK4y6UvcZSeNH49qQQOH+ym4LLIoTqHSMaxzL:bSiOK4yjNQOGzoTCSMG

Score

10^/10

discovery persistence

Malware Config

Signatures

Modifies WinLogon for persistence 2 TTPs 1 IoCs

persistence

Winlogon Helper DLL

T1547.004

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\userinit = "C:\\Windows\\system32\\userinit.exe,C:\\Windows\\apppatch\\svchost.exe,"	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
5020	svchost.exe

Modifies WinLogon 2 TTPs 2 IoCs

persistence

Winlogon Helper DLL

T1547.004

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\59aaf41 = "C:\\Windows\\apppatch\\svchost.exe"	b595e9f4106b2f7ef8c9af5e5110659e236d3d81266283f62dc25c3eb7bc6782.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\59aaf41 = "C:\\Windows\\apppatch\\svchost.exe"	svchost.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\Windows\apppatch\svchost.exe	b595e9f4106b2f7ef8c9af5e5110659e236d3d81266283f62dc25c3eb7bc6782.exe
File opened for modification	C:\Windows\apppatch\svchost.exe	b595e9f4106b2f7ef8c9af5e5110659e236d3d81266283f62dc25c3eb7bc6782.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
3276	5020	WerFault.exe	82

System Location Discovery: System Language Discovery 1 TTPs 2 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	b595e9f4106b2f7ef8c9af5e5110659e236d3d81266283f62dc25c3eb7bc6782.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
5020	svchost.exe
5020	svchost.exe

Suspicious behavior: RenamesItself 1 IoCs

pid	Process
2308	b595e9f4106b2f7ef8c9af5e5110659e236d3d81266283f62dc25c3eb7bc6782.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 2308 wrote to memory of 5020	2308	b595e9f4106b2f7ef8c9af5e5110659e236d3d81266283f62dc25c3eb7bc6782.exe	82
PID 2308 wrote to memory of 5020	2308	b595e9f4106b2f7ef8c9af5e5110659e236d3d81266283f62dc25c3eb7bc6782.exe	82
PID 2308 wrote to memory of 5020	2308	b595e9f4106b2f7ef8c9af5e5110659e236d3d81266283f62dc25c3eb7bc6782.exe	82

C:\Users\Admin\AppData\Local\Temp\b595e9f4106b2f7ef8c9af5e5110659e236d3d81266283f62dc25c3eb7bc6782.exe
"C:\Users\Admin\AppData\Local\Temp\b595e9f4106b2f7ef8c9af5e5110659e236d3d81266283f62dc25c3eb7bc6782.exe"
1⤵
- Modifies WinLogon
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: RenamesItself
- Suspicious use of WriteProcessMemory
PID:2308
- C:\Windows\apppatch\svchost.exe
  "C:\Windows\apppatch\svchost.exe"
  2⤵
  - Modifies WinLogon for persistence
  - Executes dropped EXE
  - Modifies WinLogon
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  PID:5020
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 5020 -s 984
    3⤵
    - Program crash
    PID:3276

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 5020 -ip 5020
1⤵
PID:4740

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

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Windows\apppatch\svchost.exe

Filesize
349KB

MD5
a351e44ca6ddfbd13f6da77d3b3c109d

SHA1
0192669bcdf59385a1bb0034f619ab78d02adefe

SHA256
83ec00430b42f9fc4e743906b84201bb7ce58fe3ed1753494748fd51364d4bac

SHA512
47041a4feb9f08b3fad1f9dc8b529be5dc3033e5f34d739811d42158bee019af5216169b4def40c23d72949c9b9c61fad7d5863d7470f19af00fb924067a11e3

Download Submit
memory/2308-9-0x0000000000040000-0x00000000000A9000-memory.dmp

Filesize
420KB

Download
memory/5020-10-0x0000000002C90000-0x0000000002CDA000-memory.dmp

Filesize
296KB

Download
memory/5020-13-0x0000000002D20000-0x0000000002D78000-memory.dmp

Filesize
352KB

Download
memory/5020-16-0x0000000002D20000-0x0000000002D78000-memory.dmp

Filesize
352KB

Download
memory/5020-14-0x0000000002D20000-0x0000000002D78000-memory.dmp

Filesize
352KB

Download
memory/5020-19-0x0000000002D20000-0x0000000002D78000-memory.dmp

Filesize
352KB

Download