33ddfe1862ea38aeffa1a9e478186de4f235c31453f72e8deeb338cde8480472

Analysis

max time kernel
120s
max time network
108s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
14/09/2024, 18:19

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General

Target

160b07adf0a2c766a027810931d8ef60N.exe
Size

206KB
MD5

160b07adf0a2c766a027810931d8ef60
SHA1

6d02d6e65c4d48a08529774c7918cd80522bab89
SHA256

33ddfe1862ea38aeffa1a9e478186de4f235c31453f72e8deeb338cde8480472
SHA512

235d4f9a825a1f1aa9940e29e59f0028781ada40b2ab82f77bbfcbfe73a7877f07971f39d9f2a149521da1187495079a1f92b8d0a0e2a4a92ce19548d11b8c09
SSDEEP

3072:zvEfVUzSLhIVbV6i5LirrlZrHyrUHUckoMQ2RN6unJ:zvEN2U+T6i5LirrllHy4HUcMQY6G

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-1-5-21-945322488-2060912225-3527527000-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0"	explorer.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-945322488-2060912225-3527527000-1000\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 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
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

Executes dropped EXE 4 IoCs

pid	Process
2216	explorer.exe
3664	spoolsv.exe
2272	svchost.exe
632	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	160b07adf0a2c766a027810931d8ef60N.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
File opened for modification	C:\Windows\system\udsys.exe	explorer.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 7 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	160b07adf0a2c766a027810931d8ef60N.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
656	160b07adf0a2c766a027810931d8ef60N.exe
656	160b07adf0a2c766a027810931d8ef60N.exe
2216	explorer.exe
2216	explorer.exe
2216	explorer.exe
2216	explorer.exe
2216	explorer.exe
2216	explorer.exe
2272	svchost.exe
2272	svchost.exe
2272	svchost.exe
2272	svchost.exe
2216	explorer.exe
2216	explorer.exe
2272	svchost.exe
2272	svchost.exe
2216	explorer.exe
2216	explorer.exe
2272	svchost.exe
2272	svchost.exe
2216	explorer.exe
2216	explorer.exe
2272	svchost.exe
2272	svchost.exe
2216	explorer.exe
2216	explorer.exe
2272	svchost.exe
2272	svchost.exe
2216	explorer.exe
2216	explorer.exe
2272	svchost.exe
2272	svchost.exe
2216	explorer.exe
2216	explorer.exe
2272	svchost.exe
2272	svchost.exe
2216	explorer.exe
2216	explorer.exe
2272	svchost.exe
2272	svchost.exe
2216	explorer.exe
2216	explorer.exe
2272	svchost.exe
2272	svchost.exe
2216	explorer.exe
2216	explorer.exe
2272	svchost.exe
2272	svchost.exe
2216	explorer.exe
2216	explorer.exe
2272	svchost.exe
2272	svchost.exe
2216	explorer.exe
2216	explorer.exe
2272	svchost.exe
2272	svchost.exe
2216	explorer.exe
2216	explorer.exe
2272	svchost.exe
2272	svchost.exe
2216	explorer.exe
2216	explorer.exe
2272	svchost.exe
2272	svchost.exe

Suspicious behavior: GetForegroundWindowSpam 2 IoCs

pid	Process
2216	explorer.exe
2272	svchost.exe

Suspicious use of SetWindowsHookEx 12 IoCs

pid	Process
656	160b07adf0a2c766a027810931d8ef60N.exe
656	160b07adf0a2c766a027810931d8ef60N.exe
2216	explorer.exe
2216	explorer.exe
3664	spoolsv.exe
3664	spoolsv.exe
2272	svchost.exe
2272	svchost.exe
632	spoolsv.exe
632	spoolsv.exe
2216	explorer.exe
2216	explorer.exe

Suspicious use of WriteProcessMemory 18 IoCs

description	pid	Process	procid_target
PID 656 wrote to memory of 2216	656	160b07adf0a2c766a027810931d8ef60N.exe	84
PID 656 wrote to memory of 2216	656	160b07adf0a2c766a027810931d8ef60N.exe	84
PID 656 wrote to memory of 2216	656	160b07adf0a2c766a027810931d8ef60N.exe	84
PID 2216 wrote to memory of 3664	2216	explorer.exe	86
PID 2216 wrote to memory of 3664	2216	explorer.exe	86
PID 2216 wrote to memory of 3664	2216	explorer.exe	86
PID 3664 wrote to memory of 2272	3664	spoolsv.exe	87
PID 3664 wrote to memory of 2272	3664	spoolsv.exe	87
PID 3664 wrote to memory of 2272	3664	spoolsv.exe	87
PID 2272 wrote to memory of 632	2272	svchost.exe	89
PID 2272 wrote to memory of 632	2272	svchost.exe	89
PID 2272 wrote to memory of 632	2272	svchost.exe	89
PID 2272 wrote to memory of 4732	2272	svchost.exe	90
PID 2272 wrote to memory of 4732	2272	svchost.exe	90
PID 2272 wrote to memory of 4732	2272	svchost.exe	90
PID 2272 wrote to memory of 4384	2272	svchost.exe	102
PID 2272 wrote to memory of 4384	2272	svchost.exe	102
PID 2272 wrote to memory of 4384	2272	svchost.exe	102

C:\Users\Admin\AppData\Local\Temp\160b07adf0a2c766a027810931d8ef60N.exe
"C:\Users\Admin\AppData\Local\Temp\160b07adf0a2c766a027810931d8ef60N.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:656
- \??\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:2216
- - \??\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:3664
  - - \??\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:2272
    - - \??\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:632
    - - C:\Windows\SysWOW64\at.exe
        
        at 18:21 /interactive /every:M,T,W,Th,F,S,Su c:\windows\system\svchost.exe
        5⤵
        System Location Discovery: System Language Discovery
        
        PID:4732
    - - C:\Windows\SysWOW64\at.exe
        
        at 18:22 /interactive /every:M,T,W,Th,F,S,Su c:\windows\system\svchost.exe
        5⤵
        System Location Discovery: System Language Discovery
        
        PID:4384

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
9be1fbb6deb97f5d66a05b2c9eb40615

SHA1
77e179728ce3c5bb4566251c809b3e3207814619

SHA256
4a5136c2189dc70d161042e75195a8bffcff5d9e4024859e94759f5ceba28f6a

SHA512
b99dfaa8d24097c60959ac110719868130398841da08f6c4bbaaf880ec6bb016dad48a0c1796838f305a5e039f963cc6753ee3ff8cb33df0977b2767b0a689e2

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

Filesize
206KB

MD5
d6a91868cb9cfd4a5672f54a7849d506

SHA1
0c546039f2590a026ff3b65598084d4c722b3056

SHA256
a18c8a32da7fe0f9d6b990c3359f9d02b98e45665aceebacd5421ff9938e101b

SHA512
10b9592d1fb8126b49dbd76a9c487268e38f3419ee525de2f5a2286283f9a2bd9502bcd8144b2c9d2a370eee5278b10f9e9c65197a49a651589003cd490c4689

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

Filesize
206KB

MD5
2e6402a3e5e90208e437d41d10f03442

SHA1
6e64a6c522d4f78fd67ec6decde662e5c282f76f

SHA256
08096fa70870837199096c837390eac10c8aa657e80c8b2a38522a726ea0ae1f

SHA512
113f4f3ceba81be3d820ebe32c37fa9b29303b36de60d53327cdf3c762e4b60634b7667f963c06f51d5179ab39a9483cd235c818683b0f890917d83d084455f5

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

Filesize
206KB

MD5
bcc2fbac10245f0c63b10462fa5a1ddf

SHA1
c63c055753bca543792afef3e7111c72eb01caec

SHA256
c8ce6d52aa0e14fcfdfe00b058c2cea88e807dbcc3d353250249fd7e158678a6

SHA512
f6db7752ed839f8827b3be807521627696b80f2ce81350fc543614ef953272c7629d2d9238dc9334d320e5d7b52ec071ff8af2e80deaa4a84847c1740614c7bb

Download Submit