1c00cf1fb536c2b3a76fac398817484607311f827e2254349e04b694de66ff55

Analysis

max time kernel
120s
max time network
16s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
07-09-2024 15:49

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

5080efb71ab520f789a41c45870be9c0N.exe
Size

211KB
MD5

5080efb71ab520f789a41c45870be9c0
SHA1

776bbe2d86f6269719b1158c673734021fc86e68
SHA256

1c00cf1fb536c2b3a76fac398817484607311f827e2254349e04b694de66ff55
SHA512

a16b9d76eb5ab3f86e86be5c489a1077e9107e87de0d1091ddcc231a19029c88b2d4bd7d5128176410f5ec61374ee1aae6612c6e7a8ab888d0aa65234eaa89d2
SSDEEP

3072:JD6Xtx68yygRBE52mxkEOHLRMpZ4deth8PEAjAfIbAYGPhz6sPJBInxZqOb:Jh8cBzHLRMpZ4d1Zb

Score

10^/10

discovery evasion persistence

Malware Config

Signatures

Modifies WinLogon for persistence 2 TTPs 2 IoCs

persistence

Winlogon Helper DLL

T1547.004

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\shell = "C:\\Windows\\explorer.exe, c:\\windows\\userinit.exe"	userinit.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\shell = "C:\\Windows\\explorer.exe, c:\\windows\\userinit.exe"	swchost.exe

Modifies visiblity of hidden/system files in Explorer 2 TTPs 2 IoCs

evasion

Hidden Files and Directories

T1564.001

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\USER\S-1-5-21-3063565911-2056067323-3330884624-1000\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0"	swchost.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-3063565911-2056067323-3330884624-1000\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0"	userinit.exe

Boot or Logon Autostart Execution: Active Setup 2 TTPs 8 IoCs

Adversaries may achieve persistence by adding a Registry key to the Active Setup of the local machine.

persistence

Active Setup

T1547.014

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\Software\Wow6432Node\Microsoft\Active Setup\Installed Components\{Y479C6D0-OTRW-U5GH-S1EE-E0AC10B4E666}	swchost.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{Y479C6D0-OTRW-U5GH-S1EE-E0AC10B4E666}\StubPath = "C:\\Users\\Admin\\AppData\\Local\\mrsys.exe MR"	swchost.exe
Key deleted	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{F146C9B1-VMVQ-A9RC-NUFL-D0BA00B4E999}	swchost.exe
Key created	\REGISTRY\MACHINE\Software\Wow6432Node\Microsoft\Active Setup\Installed Components\{Y479C6D0-OTRW-U5GH-S1EE-E0AC10B4E666}	userinit.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{Y479C6D0-OTRW-U5GH-S1EE-E0AC10B4E666}\StubPath = "C:\\Users\\Admin\\AppData\\Local\\mrsys.exe MR"	userinit.exe
Key created	\REGISTRY\MACHINE\Software\Wow6432Node\Microsoft\Active Setup\Installed Components\{F146C9B1-VMVQ-A9RC-NUFL-D0BA00B4E999}	swchost.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{F146C9B1-VMVQ-A9RC-NUFL-D0BA00B4E999}\StubPath = "C:\\Users\\Admin\\AppData\\Local\\mrsys.exe MR"	swchost.exe
Key deleted	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{Y479C6D0-OTRW-U5GH-S1EE-E0AC10B4E666}	swchost.exe

Executes dropped EXE 4 IoCs

pid	Process
1812	userinit.exe
2692	spoolsw.exe
2708	swchost.exe
2372	spoolsw.exe

Adds Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\RunOnce\Swchost = "c:\\windows\\swchost.exe RO"	userinit.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\RunOnce\userinit = "c:\\windows\\userinit.exe RO"	swchost.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\RunOnce\Swchost = "c:\\windows\\swchost.exe RO"	swchost.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\RunOnce\userinit = "c:\\windows\\userinit.exe RO"	userinit.exe

Drops file in System32 directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\system\udsys.exe	userinit.exe

Drops file in Windows directory 5 IoCs

description	ioc	Process
File opened for modification	\??\c:\windows\swchost.exe	swchost.exe
File opened for modification	\??\c:\windows\userinit.exe	5080efb71ab520f789a41c45870be9c0N.exe
File opened for modification	\??\c:\windows\spoolsw.exe	userinit.exe
File opened for modification	\??\c:\windows\swchost.exe	spoolsw.exe
File opened for modification	\??\c:\windows\userinit.exe	userinit.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 5 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	spoolsw.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	5080efb71ab520f789a41c45870be9c0N.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	userinit.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	spoolsw.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	swchost.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
2848	5080efb71ab520f789a41c45870be9c0N.exe
1812	userinit.exe
1812	userinit.exe
1812	userinit.exe
2708	swchost.exe
2708	swchost.exe
1812	userinit.exe
2708	swchost.exe
1812	userinit.exe
2708	swchost.exe
1812	userinit.exe
2708	swchost.exe
1812	userinit.exe
2708	swchost.exe
1812	userinit.exe
2708	swchost.exe
1812	userinit.exe
2708	swchost.exe
1812	userinit.exe
2708	swchost.exe
1812	userinit.exe
2708	swchost.exe
1812	userinit.exe
2708	swchost.exe
1812	userinit.exe
2708	swchost.exe
1812	userinit.exe
2708	swchost.exe
1812	userinit.exe
2708	swchost.exe
1812	userinit.exe
2708	swchost.exe
1812	userinit.exe
2708	swchost.exe
1812	userinit.exe
2708	swchost.exe
1812	userinit.exe
2708	swchost.exe
1812	userinit.exe
2708	swchost.exe
1812	userinit.exe
2708	swchost.exe
1812	userinit.exe
2708	swchost.exe
1812	userinit.exe
2708	swchost.exe
1812	userinit.exe
2708	swchost.exe
1812	userinit.exe
2708	swchost.exe
1812	userinit.exe
2708	swchost.exe
1812	userinit.exe
2708	swchost.exe
1812	userinit.exe
2708	swchost.exe
1812	userinit.exe
2708	swchost.exe
1812	userinit.exe
2708	swchost.exe
1812	userinit.exe
2708	swchost.exe
1812	userinit.exe
2708	swchost.exe

Suspicious behavior: GetForegroundWindowSpam 2 IoCs

pid	Process
1812	userinit.exe
2708	swchost.exe

Suspicious use of SetWindowsHookEx 12 IoCs

pid	Process
2848	5080efb71ab520f789a41c45870be9c0N.exe
2848	5080efb71ab520f789a41c45870be9c0N.exe
1812	userinit.exe
1812	userinit.exe
2692	spoolsw.exe
2692	spoolsw.exe
2708	swchost.exe
2708	swchost.exe
2372	spoolsw.exe
2372	spoolsw.exe
1812	userinit.exe
1812	userinit.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 2848 wrote to memory of 1812	2848	5080efb71ab520f789a41c45870be9c0N.exe	32
PID 2848 wrote to memory of 1812	2848	5080efb71ab520f789a41c45870be9c0N.exe	32
PID 2848 wrote to memory of 1812	2848	5080efb71ab520f789a41c45870be9c0N.exe	32
PID 2848 wrote to memory of 1812	2848	5080efb71ab520f789a41c45870be9c0N.exe	32
PID 1812 wrote to memory of 2692	1812	userinit.exe	33
PID 1812 wrote to memory of 2692	1812	userinit.exe	33
PID 1812 wrote to memory of 2692	1812	userinit.exe	33
PID 1812 wrote to memory of 2692	1812	userinit.exe	33
PID 2692 wrote to memory of 2708	2692	spoolsw.exe	34
PID 2692 wrote to memory of 2708	2692	spoolsw.exe	34
PID 2692 wrote to memory of 2708	2692	spoolsw.exe	34
PID 2692 wrote to memory of 2708	2692	spoolsw.exe	34
PID 2708 wrote to memory of 2372	2708	swchost.exe	35
PID 2708 wrote to memory of 2372	2708	swchost.exe	35
PID 2708 wrote to memory of 2372	2708	swchost.exe	35
PID 2708 wrote to memory of 2372	2708	swchost.exe	35

C:\Users\Admin\AppData\Local\Temp\5080efb71ab520f789a41c45870be9c0N.exe
"C:\Users\Admin\AppData\Local\Temp\5080efb71ab520f789a41c45870be9c0N.exe"
1⤵
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2848
- \??\c:\windows\userinit.exe
  c:\windows\userinit.exe
  2⤵
  - Modifies WinLogon for persistence
  - Modifies visiblity of hidden/system files in Explorer
  - Boot or Logon Autostart Execution: Active Setup
  - Executes dropped EXE
  - Adds Run key to start application
  - Drops file in System32 directory
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: GetForegroundWindowSpam
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:1812
- - \??\c:\windows\spoolsw.exe
    c:\windows\spoolsw.exe SE
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:2692
  - - \??\c:\windows\swchost.exe
      c:\windows\swchost.exe
      4⤵
      Modifies WinLogon for persistence
      Modifies visiblity of hidden/system files in Explorer
      Boot or Logon Autostart Execution: Active Setup
      Executes dropped EXE
      Adds Run key to start application
      Drops file in Windows directory
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      Suspicious behavior: GetForegroundWindowSpam
      Suspicious use of SetWindowsHookEx
      Suspicious use of WriteProcessMemory
      PID:2708
    - - \??\c:\windows\spoolsw.exe
        
        c:\windows\spoolsw.exe PR
        5⤵
        Executes dropped EXE
        System Location Discovery: System Language Discovery
        Suspicious use of SetWindowsHookEx
        
        PID:2372

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Active Setup

T1547.014

Registry Run Keys / Startup Folder

T1547.001

Winlogon Helper DLL

T1547.004

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Active Setup

T1547.014

Registry Run Keys / Startup Folder

T1547.001

Winlogon Helper DLL

T1547.004

Defense Evasion

Hide Artifacts

T1564

Hidden Files and Directories

T1564.001

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\mrsys.exe

Filesize
211KB

MD5
1c7372aa5bc1dd1731a5d57573481af7

SHA1
8b5b2ccd88077658598c0933d1dc732a14d3a15f

SHA256
93ffa13b0737fa3da346b3ef4428fc50d2144d956b32ed4edb5f7ea5cbc73856

SHA512
607cf26202ad4ef9d45925ff2ce8039efd3f69ec1728e01211b3583f24b10bbdc1ca2890cad927a2a5b87a001fc48e64e88951722c03ee8ba54cbe46d4fdee2b

Download Submit
C:\Windows\spoolsw.exe

Filesize
211KB

MD5
18493a8800c9c994ac136a453e4ae937

SHA1
c99916ae1bcce7c69bce0dabca0372f7a89ac6fd

SHA256
8c0ff1de0b3c297efae74f723057865ecbbb57eec72c822bb17c702848296262

SHA512
6c8fd0d4a0ba105f88d4b1495e82c1f684897c24e281c72e625885c78754d713c20b8e30ffd8a0a9e82b0848a702f2ee753686b9b396848fcc4d1fc7e085483f

Download Submit
C:\Windows\swchost.exe

Filesize
211KB

MD5
235554a8f7c7ec24e3e12f12e22cf49a

SHA1
6e5a5da23aac2286308b1f281e6c6c73a54c2e39

SHA256
a46f105f49a2a6e74227208dc8b1f588b6636737025f25d430a8abb4fc1acb24

SHA512
ada9af6c3a69ed3cf9466b37fd0e186ec9ac9d951b09391c88340f376cd65434cd6c2885670e8515b646e779c0ccd9dc2801edbf2e6a939cb4ab7b6c7435e0a7

Download Submit
C:\Windows\userinit.exe

Filesize
211KB

MD5
1e14ce1cd3fdfda050d9a0350f966bdd

SHA1
15951b197155418b75fb10a3c5ebc134141ed9c6

SHA256
af1699741639e07fd95fe891e25bd0de24780364570f33da5a5a5ff3742799a2

SHA512
641fa4cb310366b152ba5339edfc551feae5869c9f9c645162e48242be595724421ac57232454d4707f6c9774469dc0aecc5fb421cc131742670bf5002dfc9fe

Download Submit