8234f60cfbfae39174415f9d4abbfc21453f9f31e5548f13636ea9faa0b67820

Analysis

max time kernel
150s
max time network
140s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
21/11/2024, 01:06

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General

Target

8234f60cfbfae39174415f9d4abbfc21453f9f31e5548f13636ea9faa0b67820.exe
Size

206KB
MD5

6866f46c7116c1edc78a09acb11e0e77
SHA1

e2d6836eb5a222a1087d463094140808758e2718
SHA256

8234f60cfbfae39174415f9d4abbfc21453f9f31e5548f13636ea9faa0b67820
SHA512

353533dcafe8196ee4fc751f5d4bc28fa23ea6318b809ec6aee74bbd462c9f1434b3b14ab00e608d9eb8be9772701b1b8e1525819c41f670e1a303b76e140e0d
SSDEEP

3072:5vEfVUzSLhIVbV6i5LirrlZrHyrUHUckoMQ2RN6unv:5vEN2U+T6i5LirrllHy4HUcMQY6E

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\\system\\explorer.exe"	explorer.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\shell = "C:\\Windows\\explorer.exe, c:\\windows\\system\\explorer.exe"	svchost.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-1-5-21-3442511616-637977696-3186306149-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0"	explorer.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-3442511616-637977696-3186306149-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0"	svchost.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
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{Y479C6D0-OTRW-U5GH-S1EE-E0AC10B4E666}\StubPath = "C:\\Users\\Admin\\AppData\\Roaming\\mrsys.exe MR"	explorer.exe
Key created	\REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Active Setup\Installed Components\{F146C9B1-VMVQ-A9RC-NUFL-D0BA00B4E999}	svchost.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{F146C9B1-VMVQ-A9RC-NUFL-D0BA00B4E999}\StubPath = "C:\\Users\\Admin\\AppData\\Roaming\\mrsys.exe MR"	svchost.exe
Key deleted	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{Y479C6D0-OTRW-U5GH-S1EE-E0AC10B4E666}	svchost.exe
Key created	\REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Active Setup\Installed Components\{Y479C6D0-OTRW-U5GH-S1EE-E0AC10B4E666}	svchost.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{Y479C6D0-OTRW-U5GH-S1EE-E0AC10B4E666}\StubPath = "C:\\Users\\Admin\\AppData\\Roaming\\mrsys.exe MR"	svchost.exe
Key deleted	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{F146C9B1-VMVQ-A9RC-NUFL-D0BA00B4E999}	svchost.exe
Key created	\REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Active Setup\Installed Components\{Y479C6D0-OTRW-U5GH-S1EE-E0AC10B4E666}	explorer.exe

Executes dropped EXE 4 IoCs

pid	Process
1224	explorer.exe
4664	spoolsv.exe
2376	svchost.exe
3460	spoolsv.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\Explorer = "c:\\windows\\system\\explorer.exe RO"	explorer.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\RunOnce\Svchost = "c:\\windows\\system\\svchost.exe RO"	explorer.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\RunOnce\Explorer = "c:\\windows\\system\\explorer.exe RO"	svchost.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\RunOnce\Svchost = "c:\\windows\\system\\svchost.exe RO"	svchost.exe

Drops file in Windows directory 6 IoCs

description	ioc	Process
File opened for modification	C:\Windows\system\udsys.exe	explorer.exe
File opened for modification	\??\c:\windows\system\explorer.exe	8234f60cfbfae39174415f9d4abbfc21453f9f31e5548f13636ea9faa0b67820.exe
File opened for modification	\??\c:\windows\system\spoolsv.exe	explorer.exe
File opened for modification	\??\c:\windows\system\svchost.exe	spoolsv.exe
File opened for modification	\??\c:\windows\system\explorer.exe	explorer.exe
File opened for modification	\??\c:\windows\system\svchost.exe	svchost.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 8 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	explorer.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	spoolsv.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	spoolsv.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	at.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	at.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	at.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	8234f60cfbfae39174415f9d4abbfc21453f9f31e5548f13636ea9faa0b67820.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
2108	8234f60cfbfae39174415f9d4abbfc21453f9f31e5548f13636ea9faa0b67820.exe
2108	8234f60cfbfae39174415f9d4abbfc21453f9f31e5548f13636ea9faa0b67820.exe
1224	explorer.exe
1224	explorer.exe
1224	explorer.exe
1224	explorer.exe
1224	explorer.exe
1224	explorer.exe
2376	svchost.exe
2376	svchost.exe
2376	svchost.exe
2376	svchost.exe
1224	explorer.exe
1224	explorer.exe
2376	svchost.exe
2376	svchost.exe
1224	explorer.exe
1224	explorer.exe
2376	svchost.exe
2376	svchost.exe
1224	explorer.exe
1224	explorer.exe
2376	svchost.exe
2376	svchost.exe
1224	explorer.exe
1224	explorer.exe
2376	svchost.exe
2376	svchost.exe
1224	explorer.exe
1224	explorer.exe
2376	svchost.exe
2376	svchost.exe
1224	explorer.exe
1224	explorer.exe
2376	svchost.exe
2376	svchost.exe
1224	explorer.exe
1224	explorer.exe
2376	svchost.exe
2376	svchost.exe
1224	explorer.exe
1224	explorer.exe
2376	svchost.exe
2376	svchost.exe
1224	explorer.exe
1224	explorer.exe
2376	svchost.exe
2376	svchost.exe
1224	explorer.exe
1224	explorer.exe
2376	svchost.exe
2376	svchost.exe
1224	explorer.exe
1224	explorer.exe
2376	svchost.exe
2376	svchost.exe
1224	explorer.exe
1224	explorer.exe
2376	svchost.exe
2376	svchost.exe
1224	explorer.exe
1224	explorer.exe
2376	svchost.exe
2376	svchost.exe

Suspicious behavior: GetForegroundWindowSpam 2 IoCs

pid	Process
1224	explorer.exe
2376	svchost.exe

Suspicious use of SetWindowsHookEx 12 IoCs

pid	Process
2108	8234f60cfbfae39174415f9d4abbfc21453f9f31e5548f13636ea9faa0b67820.exe
2108	8234f60cfbfae39174415f9d4abbfc21453f9f31e5548f13636ea9faa0b67820.exe
1224	explorer.exe
1224	explorer.exe
4664	spoolsv.exe
4664	spoolsv.exe
2376	svchost.exe
2376	svchost.exe
3460	spoolsv.exe
3460	spoolsv.exe
1224	explorer.exe
1224	explorer.exe

Suspicious use of WriteProcessMemory 21 IoCs

description	pid	Process	procid_target
PID 2108 wrote to memory of 1224	2108	8234f60cfbfae39174415f9d4abbfc21453f9f31e5548f13636ea9faa0b67820.exe	82
PID 2108 wrote to memory of 1224	2108	8234f60cfbfae39174415f9d4abbfc21453f9f31e5548f13636ea9faa0b67820.exe	82
PID 2108 wrote to memory of 1224	2108	8234f60cfbfae39174415f9d4abbfc21453f9f31e5548f13636ea9faa0b67820.exe	82
PID 1224 wrote to memory of 4664	1224	explorer.exe	83
PID 1224 wrote to memory of 4664	1224	explorer.exe	83
PID 1224 wrote to memory of 4664	1224	explorer.exe	83
PID 4664 wrote to memory of 2376	4664	spoolsv.exe	84
PID 4664 wrote to memory of 2376	4664	spoolsv.exe	84
PID 4664 wrote to memory of 2376	4664	spoolsv.exe	84
PID 2376 wrote to memory of 3460	2376	svchost.exe	85
PID 2376 wrote to memory of 3460	2376	svchost.exe	85
PID 2376 wrote to memory of 3460	2376	svchost.exe	85
PID 2376 wrote to memory of 4508	2376	svchost.exe	86
PID 2376 wrote to memory of 4508	2376	svchost.exe	86
PID 2376 wrote to memory of 4508	2376	svchost.exe	86
PID 2376 wrote to memory of 1724	2376	svchost.exe	97
PID 2376 wrote to memory of 1724	2376	svchost.exe	97
PID 2376 wrote to memory of 1724	2376	svchost.exe	97
PID 2376 wrote to memory of 3472	2376	svchost.exe	99
PID 2376 wrote to memory of 3472	2376	svchost.exe	99
PID 2376 wrote to memory of 3472	2376	svchost.exe	99

C:\Users\Admin\AppData\Local\Temp\8234f60cfbfae39174415f9d4abbfc21453f9f31e5548f13636ea9faa0b67820.exe
"C:\Users\Admin\AppData\Local\Temp\8234f60cfbfae39174415f9d4abbfc21453f9f31e5548f13636ea9faa0b67820.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:2108
- \??\c:\windows\system\explorer.exe
  c:\windows\system\explorer.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 Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: GetForegroundWindowSpam
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:1224
- - \??\c:\windows\system\spoolsv.exe
    c:\windows\system\spoolsv.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:4664
  - - \??\c:\windows\system\svchost.exe
      c:\windows\system\svchost.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:2376
    - - \??\c:\windows\system\spoolsv.exe
        
        c:\windows\system\spoolsv.exe PR
        5⤵
        Executes dropped EXE
        System Location Discovery: System Language Discovery
        Suspicious use of SetWindowsHookEx
        
        PID:3460
    - - C:\Windows\SysWOW64\at.exe
        
        at 01:08 /interactive /every:M,T,W,Th,F,S,Su c:\windows\system\svchost.exe
        5⤵
        System Location Discovery: System Language Discovery
        
        PID:4508
    - - C:\Windows\SysWOW64\at.exe
        
        at 01:09 /interactive /every:M,T,W,Th,F,S,Su c:\windows\system\svchost.exe
        5⤵
        System Location Discovery: System Language Discovery
        
        PID:1724
    - - C:\Windows\SysWOW64\at.exe
        
        at 01:10 /interactive /every:M,T,W,Th,F,S,Su c:\windows\system\svchost.exe
        5⤵
        System Location Discovery: System Language Discovery
        
        PID:3472

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\Roaming\mrsys.exe

Filesize
206KB

MD5
896df913a3649f85c84434041502c417

SHA1
3223c774f1af3eedda73e5ce4543d5dbf15cf9ed

SHA256
fe1ddf8972497200d88e428d124f79f2f69597c2b0dbc76c9b5928fa04bf571c

SHA512
b0c57cb819e47f22241539744019b7d03c31efaeeecb255e7fbabeb81cd9a40a1569b8b5abc3f9f883805856ac2a93c35dc4e70c472bbff381bd363a41589ce6

Download Submit
C:\Windows\System\explorer.exe

Filesize
206KB

MD5
59df5648283f05fe5d3800b01eee0fcf

SHA1
fe14470237e38c460721d528729a0932902ce579

SHA256
8a5a3f5fe0474400139ec24390652e540977590e2fdef6f98d4fadf16fff9319

SHA512
ad876daf27c587a5cdb3acddd701d8c44fc151472170e3d179a8a16352f175ed31c5b9a66d11426edc2a33595e364a6f455dfc226d9128814eaa8040655a8365

Download Submit
C:\Windows\System\spoolsv.exe

Filesize
206KB

MD5
8ffc1797d2307063bf36326437e62730

SHA1
424c6eccc26c813f4f1b37728c686e507137836b

SHA256
4c8401d4726cccf2a5bfb064a090ac5d16813b3db19df5d4da061d4b38cd8e19

SHA512
078a3f839988bc72abb699d693cca1a8610677ea501c35ad7b44b724d684851ae1a44388a551009f4fba75a8f937d91e4c15e457d8b49412069ce44be253c70e

Download Submit
C:\Windows\System\svchost.exe

Filesize
206KB

MD5
8ddc0132dedf9f8863797143c9996a90

SHA1
f10d6cb3464d201615de30115d39a706795d0b30

SHA256
147129de75da29956e5ec6ef202d9a5c3185324b609ce822e28da04079e1ee00

SHA512
053529b2ca126caa39f4942d46ada6879ea936959fdd76b3a4706ee1f98d3247c390d68ca35f2594fb39eedb0c84b047a35878bbdeff0749473888208e790b96

Download Submit
memory/1224-38-0x0000000000400000-0x0000000000440000-memory.dmp

Filesize
256KB

Download
memory/2108-0-0x0000000000400000-0x0000000000440000-memory.dmp

Filesize
256KB

Download
memory/2108-37-0x0000000000400000-0x0000000000440000-memory.dmp

Filesize
256KB

Download
memory/2376-39-0x0000000000400000-0x0000000000440000-memory.dmp

Filesize
256KB

Download
memory/3460-32-0x0000000000400000-0x0000000000440000-memory.dmp

Filesize
256KB

Download
memory/4664-35-0x0000000000400000-0x0000000000440000-memory.dmp

Filesize
256KB

Download