e42621e2a5208e82867501da32bd1530e4a8d30ff389247c1cdd80dfeac6b714

Analysis

max time kernel
120s
max time network
94s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
22/11/2024, 15:25

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General

Target

e42621e2a5208e82867501da32bd1530e4a8d30ff389247c1cdd80dfeac6b714N.exe
Size

206KB
MD5

baafedd50fa04d016a17d3d14338f280
SHA1

d18576d842b724b63ff53496b26163be1adbdbc0
SHA256

e42621e2a5208e82867501da32bd1530e4a8d30ff389247c1cdd80dfeac6b714
SHA512

c973108d639cf86839d13a9b36f916198f08abb45e6c68d614557ae9de57f88900f4a6e5a3a48365a34d2bbdce11cbc3f800978973ae29100c2514c2d29b67da
SSDEEP

3072:zvEfVUzSLhIVbV6i5LirrlZrHyrUHUckoMQ2RN6unF:zvEN2U+T6i5LirrllHy4HUcMQY6a

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-1-5-21-3227495264-2217614367-4027411560-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0"	explorer.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-3227495264-2217614367-4027411560-1000\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
448	explorer.exe
220	spoolsv.exe
1224	svchost.exe
3452	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\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
File opened for modification	\??\c:\windows\system\explorer.exe	e42621e2a5208e82867501da32bd1530e4a8d30ff389247c1cdd80dfeac6b714N.exe
File opened for modification	\??\c:\windows\system\spoolsv.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	e42621e2a5208e82867501da32bd1530e4a8d30ff389247c1cdd80dfeac6b714N.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
2888	e42621e2a5208e82867501da32bd1530e4a8d30ff389247c1cdd80dfeac6b714N.exe
2888	e42621e2a5208e82867501da32bd1530e4a8d30ff389247c1cdd80dfeac6b714N.exe
448	explorer.exe
448	explorer.exe
448	explorer.exe
448	explorer.exe
448	explorer.exe
448	explorer.exe
1224	svchost.exe
1224	svchost.exe
1224	svchost.exe
1224	svchost.exe
448	explorer.exe
448	explorer.exe
1224	svchost.exe
1224	svchost.exe
448	explorer.exe
448	explorer.exe
1224	svchost.exe
1224	svchost.exe
448	explorer.exe
448	explorer.exe
1224	svchost.exe
1224	svchost.exe
448	explorer.exe
448	explorer.exe
1224	svchost.exe
1224	svchost.exe
448	explorer.exe
448	explorer.exe
1224	svchost.exe
1224	svchost.exe
448	explorer.exe
448	explorer.exe
1224	svchost.exe
1224	svchost.exe
448	explorer.exe
448	explorer.exe
1224	svchost.exe
1224	svchost.exe
448	explorer.exe
448	explorer.exe
1224	svchost.exe
1224	svchost.exe
448	explorer.exe
448	explorer.exe
1224	svchost.exe
1224	svchost.exe
448	explorer.exe
448	explorer.exe
1224	svchost.exe
1224	svchost.exe
448	explorer.exe
448	explorer.exe
1224	svchost.exe
1224	svchost.exe
448	explorer.exe
448	explorer.exe
1224	svchost.exe
1224	svchost.exe
448	explorer.exe
448	explorer.exe
1224	svchost.exe
1224	svchost.exe

Suspicious behavior: GetForegroundWindowSpam 2 IoCs

pid	Process
448	explorer.exe
1224	svchost.exe

Suspicious use of SetWindowsHookEx 12 IoCs

pid	Process
2888	e42621e2a5208e82867501da32bd1530e4a8d30ff389247c1cdd80dfeac6b714N.exe
2888	e42621e2a5208e82867501da32bd1530e4a8d30ff389247c1cdd80dfeac6b714N.exe
448	explorer.exe
448	explorer.exe
220	spoolsv.exe
220	spoolsv.exe
1224	svchost.exe
1224	svchost.exe
3452	spoolsv.exe
3452	spoolsv.exe
448	explorer.exe
448	explorer.exe

Suspicious use of WriteProcessMemory 18 IoCs

description	pid	Process	procid_target
PID 2888 wrote to memory of 448	2888	e42621e2a5208e82867501da32bd1530e4a8d30ff389247c1cdd80dfeac6b714N.exe	82
PID 2888 wrote to memory of 448	2888	e42621e2a5208e82867501da32bd1530e4a8d30ff389247c1cdd80dfeac6b714N.exe	82
PID 2888 wrote to memory of 448	2888	e42621e2a5208e82867501da32bd1530e4a8d30ff389247c1cdd80dfeac6b714N.exe	82
PID 448 wrote to memory of 220	448	explorer.exe	83
PID 448 wrote to memory of 220	448	explorer.exe	83
PID 448 wrote to memory of 220	448	explorer.exe	83
PID 220 wrote to memory of 1224	220	spoolsv.exe	84
PID 220 wrote to memory of 1224	220	spoolsv.exe	84
PID 220 wrote to memory of 1224	220	spoolsv.exe	84
PID 1224 wrote to memory of 3452	1224	svchost.exe	85
PID 1224 wrote to memory of 3452	1224	svchost.exe	85
PID 1224 wrote to memory of 3452	1224	svchost.exe	85
PID 1224 wrote to memory of 4924	1224	svchost.exe	86
PID 1224 wrote to memory of 4924	1224	svchost.exe	86
PID 1224 wrote to memory of 4924	1224	svchost.exe	86
PID 1224 wrote to memory of 756	1224	svchost.exe	97
PID 1224 wrote to memory of 756	1224	svchost.exe	97
PID 1224 wrote to memory of 756	1224	svchost.exe	97

C:\Users\Admin\AppData\Local\Temp\e42621e2a5208e82867501da32bd1530e4a8d30ff389247c1cdd80dfeac6b714N.exe
"C:\Users\Admin\AppData\Local\Temp\e42621e2a5208e82867501da32bd1530e4a8d30ff389247c1cdd80dfeac6b714N.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:2888
- \??\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:448
- - \??\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:220
  - - \??\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:1224
    - - \??\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:3452
    - - C:\Windows\SysWOW64\at.exe
        
        at 15:27 /interactive /every:M,T,W,Th,F,S,Su c:\windows\system\svchost.exe
        5⤵
        System Location Discovery: System Language Discovery
        
        PID:4924
    - - C:\Windows\SysWOW64\at.exe
        
        at 15:28 /interactive /every:M,T,W,Th,F,S,Su c:\windows\system\svchost.exe
        5⤵
        System Location Discovery: System Language Discovery
        
        PID:756

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
923b23fe33bb4c3c19bf80f8548a251d

SHA1
6b9844fb2db972aa1f1120aab915d8174ddf8acb

SHA256
7830f9b2f78535f5f715726f1b3446dbf904c7781c3115067ea129440e6606d8

SHA512
be2a28f797090970cc1b9c68b66bbb0e4aa06a16d15e5307ede686de37b89e7cc829d1befa54e960cbad9460517455676d2caefa3e3c5527261cad373a8b5635

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C:\Windows\System\explorer.exe

Filesize
206KB

MD5
c58395c5e8e974937f6d18b0cdbf1d4c

SHA1
5ee908ca2846ad3677b8728aa89981598ecd144f

SHA256
1384d58bfe9c5c84ef6e96ac4694bbf2947e39875ded82826a36093a358b4c8e

SHA512
282c87680b61c74f2ffca5cfd6ced23d44bd353e74806d9656986329c4af8405ed41fe48a9f557e82f59397efecd5fcbe80842316fe53c434895b529a4aef05f

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C:\Windows\System\spoolsv.exe

Filesize
206KB

MD5
b48e9d1e8194684c3f4f236d8bc2f903

SHA1
782be1122adf954b2e3143bbac6b35ae8b7cd631

SHA256
cfd376005e84bd28dcc990ca6bac5860772fe27297c8c05b1915b22105a9cdf1

SHA512
65877bdac71bb0c7a3c96e4b7383aa9dd94f74f882bf34e63860c90c30cd7d4a32f5fabd050f88b795df731f015f7580e1dd4dbe088d8109a58d4a4b4fbd2f27

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C:\Windows\System\svchost.exe

Filesize
206KB

MD5
c9ba8010017d13c7bf965078412929d9

SHA1
7d7b19473cc1ba9fe89be93f746fa7c8125ab1f6

SHA256
5afb2c802406b1ad3ecf2690a75da8c56fa46bfcef4bd8b1174dcfd4a166777e

SHA512
cde5806e4b253252cea035c67923610674785eed7455d183a5ba720587864a07ad3e101c3e9190042ed8bce46da6489af5a3b6c33e4008c51fd77562a55db2bb

Download Submit