6966abeae5c51d169fc04e631bdb3f510c33322430151d8b8835a5a070b53c12

Analysis

max time kernel
120s
max time network
17s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
20/09/2024, 12:40

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General

Target

6966abeae5c51d169fc04e631bdb3f510c33322430151d8b8835a5a070b53c12N.exe
Size

211KB
MD5

b8d5396cea016bbc4b4911a14a8d6260
SHA1

fb87f9231e9f2e6438be13876cf9ca5345507f6f
SHA256

6966abeae5c51d169fc04e631bdb3f510c33322430151d8b8835a5a070b53c12
SHA512

969a846371efe4cf4428a32a68b4e38dcdd2bf41bcbcd9a01e27dd751cee5516aa9c971fc581e30db737bb6f5820cb324fba60724ce5f527c9dc6c1922418b73
SSDEEP

3072:JD6Xtx68yygRBE52mxkEOHLRMpZ4deth8PEAjAfIbAYGPhz6sPJBInxZqOU:Jh8cBzHLRMpZ4d1ZU

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-1-5-21-3533259084-2542256011-65585152-1000\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0"	userinit.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-3533259084-2542256011-65585152-1000\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0"	swchost.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
2508	userinit.exe
2892	spoolsw.exe
3036	swchost.exe
2672	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\userinit = "c:\\windows\\userinit.exe RO"	userinit.exe
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

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	6966abeae5c51d169fc04e631bdb3f510c33322430151d8b8835a5a070b53c12N.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	userinit.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	spoolsw.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	swchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	spoolsw.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	6966abeae5c51d169fc04e631bdb3f510c33322430151d8b8835a5a070b53c12N.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
1712	6966abeae5c51d169fc04e631bdb3f510c33322430151d8b8835a5a070b53c12N.exe
2508	userinit.exe
2508	userinit.exe
2508	userinit.exe
3036	swchost.exe
3036	swchost.exe
2508	userinit.exe
3036	swchost.exe
2508	userinit.exe
3036	swchost.exe
2508	userinit.exe
3036	swchost.exe
2508	userinit.exe
3036	swchost.exe
2508	userinit.exe
3036	swchost.exe
2508	userinit.exe
3036	swchost.exe
2508	userinit.exe
3036	swchost.exe
2508	userinit.exe
3036	swchost.exe
2508	userinit.exe
3036	swchost.exe
2508	userinit.exe
3036	swchost.exe
2508	userinit.exe
3036	swchost.exe
2508	userinit.exe
3036	swchost.exe
2508	userinit.exe
3036	swchost.exe
2508	userinit.exe
3036	swchost.exe
2508	userinit.exe
3036	swchost.exe
2508	userinit.exe
3036	swchost.exe
2508	userinit.exe
3036	swchost.exe
2508	userinit.exe
3036	swchost.exe
2508	userinit.exe
3036	swchost.exe
2508	userinit.exe
3036	swchost.exe
2508	userinit.exe
3036	swchost.exe
2508	userinit.exe
3036	swchost.exe
2508	userinit.exe
3036	swchost.exe
2508	userinit.exe
3036	swchost.exe
2508	userinit.exe
3036	swchost.exe
2508	userinit.exe
3036	swchost.exe
2508	userinit.exe
3036	swchost.exe
2508	userinit.exe
3036	swchost.exe
2508	userinit.exe
3036	swchost.exe

Suspicious behavior: GetForegroundWindowSpam 2 IoCs

pid	Process
2508	userinit.exe
3036	swchost.exe

Suspicious use of SetWindowsHookEx 12 IoCs

pid	Process
1712	6966abeae5c51d169fc04e631bdb3f510c33322430151d8b8835a5a070b53c12N.exe
1712	6966abeae5c51d169fc04e631bdb3f510c33322430151d8b8835a5a070b53c12N.exe
2508	userinit.exe
2508	userinit.exe
2892	spoolsw.exe
2892	spoolsw.exe
3036	swchost.exe
3036	swchost.exe
2672	spoolsw.exe
2672	spoolsw.exe
2508	userinit.exe
2508	userinit.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 1712 wrote to memory of 2508	1712	6966abeae5c51d169fc04e631bdb3f510c33322430151d8b8835a5a070b53c12N.exe	31
PID 1712 wrote to memory of 2508	1712	6966abeae5c51d169fc04e631bdb3f510c33322430151d8b8835a5a070b53c12N.exe	31
PID 1712 wrote to memory of 2508	1712	6966abeae5c51d169fc04e631bdb3f510c33322430151d8b8835a5a070b53c12N.exe	31
PID 1712 wrote to memory of 2508	1712	6966abeae5c51d169fc04e631bdb3f510c33322430151d8b8835a5a070b53c12N.exe	31
PID 2508 wrote to memory of 2892	2508	userinit.exe	32
PID 2508 wrote to memory of 2892	2508	userinit.exe	32
PID 2508 wrote to memory of 2892	2508	userinit.exe	32
PID 2508 wrote to memory of 2892	2508	userinit.exe	32
PID 2892 wrote to memory of 3036	2892	spoolsw.exe	33
PID 2892 wrote to memory of 3036	2892	spoolsw.exe	33
PID 2892 wrote to memory of 3036	2892	spoolsw.exe	33
PID 2892 wrote to memory of 3036	2892	spoolsw.exe	33
PID 3036 wrote to memory of 2672	3036	swchost.exe	34
PID 3036 wrote to memory of 2672	3036	swchost.exe	34
PID 3036 wrote to memory of 2672	3036	swchost.exe	34
PID 3036 wrote to memory of 2672	3036	swchost.exe	34

C:\Users\Admin\AppData\Local\Temp\6966abeae5c51d169fc04e631bdb3f510c33322430151d8b8835a5a070b53c12N.exe
"C:\Users\Admin\AppData\Local\Temp\6966abeae5c51d169fc04e631bdb3f510c33322430151d8b8835a5a070b53c12N.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:1712
- \??\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:2508
- - \??\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:2892
  - - \??\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:3036
    - - \??\c:\windows\spoolsw.exe
        
        c:\windows\spoolsw.exe PR
        5⤵
        Executes dropped EXE
        System Location Discovery: System Language Discovery
        Suspicious use of SetWindowsHookEx
        
        PID:2672

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

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Downloads

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

Filesize
211KB

MD5
28b6b789b18b172b19ec5723fc48cacb

SHA1
8d19c9c6d9d4217b29d9d627a1df959612d73299

SHA256
77269521f152b4dfd0ad8b012cd2191ad8c0df103d93b2fd56a87561420959bd

SHA512
a927fd15e291da8a2361266c1fea924e9d2a9ccd29a8fa72397fc099abef96305c3a7539dac4b7ebe00ebd250b990e83f538a1af68a1838583fc9145e914aa86

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C:\Windows\spoolsw.exe

Filesize
211KB

MD5
2af8c421b29778dbe205aaea72b4ab28

SHA1
d63dba57b0118aaecce87093c604bdce66d42906

SHA256
305fdd5b9dde7099ce1ef28e63ac000908da193b821e85928ea61943b31a4caf

SHA512
61eb96495585797c817d03832ff8cd1c17e672917b8bda7ab782e43c6ff4e3189eb7837bc184d8042b4a959610cf4c04bc48618276318958a65d3d96787bd37a

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C:\Windows\swchost.exe

Filesize
211KB

MD5
562a01eaa959006ed96c9ef07259ae4d

SHA1
ef966572a2203e855c48abb48e5c2045b6ad188c

SHA256
41eacd2c57ea43ecbbae1fd450ecf4505e68974becbc5b4ec62a07e0d8cb08f1

SHA512
dd05b697252321cfeb228661b0e3ad2d6f07b9c4bf69ac5cb45725367f2f479dbf5a90db5fb30df34b2e5eeb499e09ab124f61152dfa645f549fae85e0e093e6

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C:\Windows\userinit.exe

Filesize
211KB

MD5
07636018904775abd46ab0264b8d76b8

SHA1
95fb0d9010d36221a0926668c96e1c0206e03613

SHA256
60828437246bd2231117a01bf61f9e1089bacf6b66564abdc48c797dc7840d46

SHA512
33f9e2e2e726f2c341084c08b8d2a64c539e9b10c570a46a7f6b71d7967840ea919bcb06fea5cc115f7a490639c4c75588d2943ba73b00c5ef3e74d3cbfd00e8

Download Submit