ca0f505b0010a26226f9b1f47ef48fe0688b163d13aea8da095b746c3c989a55

Analysis

max time kernel
150s
max time network
124s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
12/08/2024, 02:17

Sharing

Copy URL Twitter E-mail

Report Analysis Logs

General

Target

ca0f505b0010a26226f9b1f47ef48fe0688b163d13aea8da095b746c3c989a55.exe
Size

206KB
MD5

7cc69dce9b289f96d0d1bf3009f405c5
SHA1

872f976fd2af8b4e95532d9c6f8b8a0242cc2f05
SHA256

ca0f505b0010a26226f9b1f47ef48fe0688b163d13aea8da095b746c3c989a55
SHA512

163a48c2224f72fe9d62411f4b4b0dbdb2c0b360bc6aa44d92c9aab14bf0ba288ae1eb60814d8dac4feeec2214b30687d1e3e683e442b93360c124de909d9625
SSDEEP

3072:zvEfVUzSLhIVbV6i5LirrlZrHyrUHUckoMQ2RN6un+:zvEN2U+T6i5LirrllHy4HUcMQY6X

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"	svchost.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\shell = "C:\\Windows\\explorer.exe, c:\\windows\\system\\explorer.exe"	explorer.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-1-5-21-4182098368-2521458979-3782681353-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0"	explorer.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-4182098368-2521458979-3782681353-1000\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
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
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

Executes dropped EXE 4 IoCs

pid	Process
3144	explorer.exe
4996	spoolsv.exe
876	svchost.exe
1420	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\explorer.exe	explorer.exe
File opened for modification	\??\c:\windows\system\svchost.exe	svchost.exe
File opened for modification	C:\Windows\system\udsys.exe	explorer.exe
File opened for modification	\??\c:\windows\system\explorer.exe	ca0f505b0010a26226f9b1f47ef48fe0688b163d13aea8da095b746c3c989a55.exe
File opened for modification	\??\c:\windows\system\spoolsv.exe	explorer.exe
File opened for modification	\??\c:\windows\system\svchost.exe	spoolsv.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	at.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	ca0f505b0010a26226f9b1f47ef48fe0688b163d13aea8da095b746c3c989a55.exe
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

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
3464	ca0f505b0010a26226f9b1f47ef48fe0688b163d13aea8da095b746c3c989a55.exe
3464	ca0f505b0010a26226f9b1f47ef48fe0688b163d13aea8da095b746c3c989a55.exe
3144	explorer.exe
3144	explorer.exe
3144	explorer.exe
3144	explorer.exe
3144	explorer.exe
3144	explorer.exe
876	svchost.exe
876	svchost.exe
876	svchost.exe
876	svchost.exe
3144	explorer.exe
3144	explorer.exe
876	svchost.exe
876	svchost.exe
3144	explorer.exe
3144	explorer.exe
876	svchost.exe
876	svchost.exe
3144	explorer.exe
3144	explorer.exe
876	svchost.exe
876	svchost.exe
3144	explorer.exe
3144	explorer.exe
876	svchost.exe
876	svchost.exe
876	svchost.exe
876	svchost.exe
3144	explorer.exe
3144	explorer.exe
876	svchost.exe
3144	explorer.exe
876	svchost.exe
3144	explorer.exe
3144	explorer.exe
876	svchost.exe
876	svchost.exe
3144	explorer.exe
3144	explorer.exe
876	svchost.exe
3144	explorer.exe
876	svchost.exe
876	svchost.exe
876	svchost.exe
3144	explorer.exe
3144	explorer.exe
3144	explorer.exe
876	svchost.exe
3144	explorer.exe
876	svchost.exe
3144	explorer.exe
876	svchost.exe
876	svchost.exe
3144	explorer.exe
3144	explorer.exe
876	svchost.exe
3144	explorer.exe
876	svchost.exe
3144	explorer.exe
876	svchost.exe
3144	explorer.exe
876	svchost.exe

Suspicious behavior: GetForegroundWindowSpam 2 IoCs

pid	Process
876	svchost.exe
3144	explorer.exe

Suspicious use of SetWindowsHookEx 12 IoCs

pid	Process
3464	ca0f505b0010a26226f9b1f47ef48fe0688b163d13aea8da095b746c3c989a55.exe
3464	ca0f505b0010a26226f9b1f47ef48fe0688b163d13aea8da095b746c3c989a55.exe
3144	explorer.exe
3144	explorer.exe
4996	spoolsv.exe
4996	spoolsv.exe
876	svchost.exe
876	svchost.exe
1420	spoolsv.exe
1420	spoolsv.exe
3144	explorer.exe
3144	explorer.exe

Suspicious use of WriteProcessMemory 21 IoCs

description	pid	Process	procid_target
PID 3464 wrote to memory of 3144	3464	ca0f505b0010a26226f9b1f47ef48fe0688b163d13aea8da095b746c3c989a55.exe	84
PID 3464 wrote to memory of 3144	3464	ca0f505b0010a26226f9b1f47ef48fe0688b163d13aea8da095b746c3c989a55.exe	84
PID 3464 wrote to memory of 3144	3464	ca0f505b0010a26226f9b1f47ef48fe0688b163d13aea8da095b746c3c989a55.exe	84
PID 3144 wrote to memory of 4996	3144	explorer.exe	85
PID 3144 wrote to memory of 4996	3144	explorer.exe	85
PID 3144 wrote to memory of 4996	3144	explorer.exe	85
PID 4996 wrote to memory of 876	4996	spoolsv.exe	86
PID 4996 wrote to memory of 876	4996	spoolsv.exe	86
PID 4996 wrote to memory of 876	4996	spoolsv.exe	86
PID 876 wrote to memory of 1420	876	svchost.exe	87
PID 876 wrote to memory of 1420	876	svchost.exe	87
PID 876 wrote to memory of 1420	876	svchost.exe	87
PID 876 wrote to memory of 3704	876	svchost.exe	89
PID 876 wrote to memory of 3704	876	svchost.exe	89
PID 876 wrote to memory of 3704	876	svchost.exe	89
PID 876 wrote to memory of 4816	876	svchost.exe	103
PID 876 wrote to memory of 4816	876	svchost.exe	103
PID 876 wrote to memory of 4816	876	svchost.exe	103
PID 876 wrote to memory of 4780	876	svchost.exe	114
PID 876 wrote to memory of 4780	876	svchost.exe	114
PID 876 wrote to memory of 4780	876	svchost.exe	114

C:\Users\Admin\AppData\Local\Temp\ca0f505b0010a26226f9b1f47ef48fe0688b163d13aea8da095b746c3c989a55.exe
"C:\Users\Admin\AppData\Local\Temp\ca0f505b0010a26226f9b1f47ef48fe0688b163d13aea8da095b746c3c989a55.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:3464
- \??\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:3144
- - \??\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:4996
  - - \??\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:876
    - - \??\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:1420
    - - C:\Windows\SysWOW64\at.exe
        
        at 02:19 /interactive /every:M,T,W,Th,F,S,Su c:\windows\system\svchost.exe
        5⤵
        System Location Discovery: System Language Discovery
        
        PID:3704
    - - C:\Windows\SysWOW64\at.exe
        
        at 02:20 /interactive /every:M,T,W,Th,F,S,Su c:\windows\system\svchost.exe
        5⤵
        System Location Discovery: System Language Discovery
        
        PID:4816
    - - C:\Windows\SysWOW64\at.exe
        
        at 02:21 /interactive /every:M,T,W,Th,F,S,Su c:\windows\system\svchost.exe
        5⤵
        System Location Discovery: System Language Discovery
        
        PID:4780

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\Roaming\mrsys.exe

Filesize
206KB

MD5
da7d9cbe6359838f58ec88a149ef81f5

SHA1
88513b2f2ed808828fc51c925dd51c6277af235a

SHA256
2cb1d0d58a29b669e56b1e83bf52e37870aafad38a61d79c177b2a31bd1ddf5c

SHA512
4fcfca0c593ad328c4d04686dcbb61e68aef22191c0ac3559ea29aec94a3ef3002aace6ded26c4fcab48fc4f9d5882a4bf9e8f8d5759fcce4a320175c54a1c57

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

Filesize
206KB

MD5
e578ea9b63ead330b359cfb103fb0785

SHA1
543aa407c28bbe33fcaff3b99cfe549e69afdaaa

SHA256
aa0390019a8106dd6c9bc364dd25d4c19983c3e0198d69b0a9e81487819067a3

SHA512
ace046ddbe8f5da6540f2c8958ab5db8c22b6b0f0186195bd5ba58f000c0bc9c88a1e3fba6c6f493c1a8b40238a4c0e25477e106cf9f7babbebf3fa42a06bf3f

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

Filesize
206KB

MD5
0ad332ba6c4566de06d3cbe35ffaea05

SHA1
7c1bc62b8765b0d4ecfb21fd1b644da376153773

SHA256
348d9b27940340e44f50292c13decf5b2088bf84412088c33f41768e2e96fad6

SHA512
99756397ae35170774a93757090f0f4ff32cca96c9a7ae2f4a5365824b3f9a18274d075d8757750c53820d15801521a1c1e5f8d6c3fea61d943f001ffbd00927

Download Submit
\??\c:\windows\system\explorer.exe

Filesize
206KB

MD5
d88cacdba80f6eb50be4f400d71b6d8c

SHA1
211fe3b379ff182712eab57dd00ee06cbb53d38e

SHA256
12b399eec8d55c3f5569888be61d241ee8693b8a20ac864a59b8114e0cf8f422

SHA512
a0ec56985ab477484cb11397bd6aa513a178f2b1795294778a7f4cecc9b34f23518f6f2da864ea7f7f3e1fc72ff45d18a4bd6610cd605e888f20eb304e3b6d82

Download Submit