abd58454215b8ce245c125553165df975f139679d50ed5268db7551816de6e8a

Analysis

user interaction
yes
max time kernel
150s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260709-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
21/07/2026, 12:24

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General

Target
loader.exe
Size 15.2MB
Sample260721-pla4aahd85
SHA256 abd58454215b8ce245c125553165df975f139679d50ed5268db7551816de6e8a
MD5 42f505cee0c9af9cbc52d08119002b45
SHA1 e3b6f4239a177cd6cb0c9b30ac1f972db736e512
SHA512 3258de55321ff3b0c09a63a8ac231dd8eb4631ae69c828ebba80f182eef30559a9eaae2e521c1d708c4bc252cbd40231d52358b4506a11d082b826a4af932a92
SSDEEP 393216:j7vatQB/xfuYfYhS0QGKLe/4KywxRG4lI:vwQtxfZrGKLuN3vG42
TLSH
T134F623D7A0BD96A9E1C307B02CC223CB35CC74564CA99D1935CE6806BD66CAF82CD776
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

defense_evasion discovery persistence

Malware Config

Signatures

Modifies visibility of hidden/system files in Explorer 2 TTPs 2 IoCs

defense_evasion

Hidden Files and Directories

T1564.001

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\USER\S-1-5-21-3797332335-34111092-3597280141-1000\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0"	explorer.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-3797332335-34111092-3597280141-1000\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0"	svchost.exe

Executes dropped EXE 6 IoCs

pid	Process
2076	loader.exe
2416	icsys.icn.exe
4956	explorer.exe
3760	spoolsv.exe
1468	svchost.exe
2368	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\\resources\\themes\\explorer.exe RO"	explorer.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\RunOnce\Svchost = "c:\\windows\\resources\\svchost.exe RO"	explorer.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\RunOnce\Explorer = "c:\\windows\\resources\\themes\\explorer.exe RO"	svchost.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\RunOnce\Svchost = "c:\\windows\\resources\\svchost.exe RO"	svchost.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\explorer.exe	explorer.exe
File opened for modification	C:\Windows\SysWOW64\explorer.exe	svchost.exe

Drops file in Windows directory 5 IoCs

description	ioc	Process
File opened for modification	\??\c:\windows\resources\spoolsv.exe	explorer.exe
File opened for modification	\??\c:\windows\resources\svchost.exe	spoolsv.exe
File opened for modification	C:\Windows\Resources\tjud.exe	explorer.exe
File opened for modification	C:\Windows\Resources\Themes\icsys.icn.exe	loader.exe
File opened for modification	\??\c:\windows\resources\themes\explorer.exe	icsys.icn.exe

System Location Discovery: System Language Discovery 1 TTPs 6 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	loader.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	icsys.icn.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

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
2620	loader.exe
2620	loader.exe
2620	loader.exe
2620	loader.exe
2620	loader.exe
2620	loader.exe
2620	loader.exe
2620	loader.exe
2620	loader.exe
2620	loader.exe
2620	loader.exe
2620	loader.exe
2620	loader.exe
2620	loader.exe
2620	loader.exe
2620	loader.exe
2620	loader.exe
2620	loader.exe
2620	loader.exe
2620	loader.exe
2620	loader.exe
2620	loader.exe
2620	loader.exe
2620	loader.exe
2620	loader.exe
2620	loader.exe
2620	loader.exe
2620	loader.exe
2620	loader.exe
2620	loader.exe
2620	loader.exe
2620	loader.exe
2416	icsys.icn.exe
2416	icsys.icn.exe
2416	icsys.icn.exe
2416	icsys.icn.exe
2416	icsys.icn.exe
2416	icsys.icn.exe
2416	icsys.icn.exe
2416	icsys.icn.exe
2416	icsys.icn.exe
2416	icsys.icn.exe
2416	icsys.icn.exe
2416	icsys.icn.exe
2416	icsys.icn.exe
2416	icsys.icn.exe
2416	icsys.icn.exe
2416	icsys.icn.exe
2416	icsys.icn.exe
2416	icsys.icn.exe
2416	icsys.icn.exe
2416	icsys.icn.exe
2416	icsys.icn.exe
2416	icsys.icn.exe
2416	icsys.icn.exe
2416	icsys.icn.exe
2416	icsys.icn.exe
2416	icsys.icn.exe
2416	icsys.icn.exe
2416	icsys.icn.exe
2416	icsys.icn.exe
2416	icsys.icn.exe
2416	icsys.icn.exe
2416	icsys.icn.exe

Suspicious behavior: GetForegroundWindowSpam 2 IoCs

pid	Process
1468	svchost.exe
4956	explorer.exe

Suspicious use of SetWindowsHookEx 12 IoCs

pid	Process
2620	loader.exe
2620	loader.exe
2416	icsys.icn.exe
2416	icsys.icn.exe
4956	explorer.exe
4956	explorer.exe
3760	spoolsv.exe
3760	spoolsv.exe
1468	svchost.exe
1468	svchost.exe
2368	spoolsv.exe
2368	spoolsv.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2620 wrote to memory of 2076	2620	loader.exe	89
PID 2620 wrote to memory of 2416	2620	loader.exe	90
PID 2416 wrote to memory of 4956	2416	icsys.icn.exe	91
PID 4956 wrote to memory of 3760	4956	explorer.exe	92
PID 3760 wrote to memory of 1468	3760	spoolsv.exe	93
PID 1468 wrote to memory of 2368	1468	svchost.exe	94

C:\Users\Admin\AppData\Local\Temp\loader.exe
"C:\Users\Admin\AppData\Local\Temp\loader.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:2620
- \??\c:\users\admin\appdata\local\temp\loader.exe
  c:\users\admin\appdata\local\temp\loader.exe
  2⤵
  - Executes dropped EXE
  PID:2076
- C:\Windows\Resources\Themes\icsys.icn.exe
  C:\Windows\Resources\Themes\icsys.icn.exe
  2⤵
  - Executes dropped EXE
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2416
- - \??\c:\windows\resources\themes\explorer.exe
    c:\windows\resources\themes\explorer.exe
    3⤵
    - Modifies visibility of hidden/system files in Explorer
    - 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: GetForegroundWindowSpam
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:4956
  - - \??\c:\windows\resources\spoolsv.exe
      c:\windows\resources\spoolsv.exe SE
      4⤵
      Executes dropped EXE
      Drops file in Windows directory
      System Location Discovery: System Language Discovery
      Suspicious use of SetWindowsHookEx
      Suspicious use of WriteProcessMemory
      PID:3760
    - - \??\c:\windows\resources\svchost.exe
        
        c:\windows\resources\svchost.exe
        5⤵
        Modifies visibility of hidden/system files in Explorer
        Executes dropped EXE
        Adds Run key to start application
        Drops file in System32 directory
        System Location Discovery: System Language Discovery
        Suspicious behavior: GetForegroundWindowSpam
        Suspicious use of SetWindowsHookEx
        Suspicious use of WriteProcessMemory
        
        PID:1468
      - \??\c:\windows\resources\spoolsv.exe
        
        c:\windows\resources\spoolsv.exe PR
        6⤵
        Executes dropped EXE
        System Location Discovery: System Language Discovery
        Suspicious use of SetWindowsHookEx
        
        PID:2368

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Hide Artifacts

T1564

Hidden Files and Directories

T1564.001

Modify Registry

T1112

Credential Access

Discovery

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

explorer.exe

Path C:\Windows\Resources\Themes\explorer.exe
Size 135KB
SHA256 35587fce214fdf43cc3c3ff69c84dcf5e111a5a69ecbde629246eb32f333f974
MD5 fcb5d474764fbfc5c326ff2f04620440
SHA1 dde4bff005051b106fa6378d503412e92d90384b
SHA512 fe6942e5700a6c6f8a0f68014bd30d48b3dc4e0c7d3e19564e70be6c5046bfc186cec524e56d58df34c3f46da3fcd62db800ff658a9f43b25d86cb5c8b4ef18e
SSDEEP 1536:UfsEqouTRcG/Mzvgf7xEuvnXNTRdUzwTekUOisZ1yDDajtXbVhpalR:UVqoCl/YgjxEufVU0TbTyDDalQlR
TLSH
T1FBD3F723AF107C7ED416C9F1789AE96EB4661E360BD06C0776A6FB142A7224771F420F
MD5 SHA1 SHA512 SSDEEP TLSH

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icsys.icn.exe

Path C:\Windows\Resources\Themes\icsys.icn.exe
Size 135KB
SHA256 9587663ead3262353cd39a7ec002470d62d37b276d5fc41711b4e7499ecbd179
MD5 3208f4ea29e7e13e99bacb715d0472cf
SHA1 ae73a88a5713cdf2321ea2fe8b5fc82f471ed0b9
SHA512 5adb52b3f9a63024038d0144e10e5af60f93450d8eacc488463c6265f2d00dc90a36da0eca335cf773ce95cf60b7d4e39c6c628087f424ac0b1ee3d4762a82d9
SSDEEP 1536:UfsEqouTRcG/Mzvgf7xEuvnXNTRdUzwTekUOisZ1yDDajtXbVhpalj:UVqoCl/YgjxEufVU0TbTyDDalQlj
TLSH
T1C7D3F723AE109C3AD8118AF178E5EB6BFA124E651B94AD0B32A3FF14297114775F431F
MD5 SHA1 SHA512 SSDEEP TLSH

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svchost.exe

Path C:\Windows\Resources\svchost.exe
Size 135KB
SHA256 049bb0237b854b99f84bfbace3b214b1594dc16140dd7f2071f3ab84754b11d8
MD5 dbc3cf2312dea70d10b191519eb71331
SHA1 370e08e566aa01c5e6b4779534de737f8d97a06c
SHA512 67a200d532a772f73570db09f38a84441a6f0d875ec5cd5be640471170db348d4ea4d6c5c50f64109c4daacfd077eb8217f66e0057cd9aeb0ecf8c1cbde162df
SSDEEP 1536:UfsEqouTRcG/Mzvgf7xEuvnXNTRdUzwTekUOisZ1yDDajtXbVhpalT:UVqoCl/YgjxEufVU0TbTyDDalQlT
TLSH
T19AD3D6236F105C3EDD128AF97C6AEA2EBA260E361BA59D077365BB10357210775F120F
MD5 SHA1 SHA512 SSDEEP TLSH

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loader.exe

Path \??\c:\users\admin\appdata\local\temp\loader.exe
Size 15.0MB
SHA256 b3dac05c8bcb632cb1ec8adc000c18dfaebb80a86ac7be8dd8fc73d78929dcca
MD5 15a517f4d2bbdf662ae8599aa884fb0a
SHA1 dd37bb254db0254bceed080d85a6a3e7dc7d1fa3
SHA512 1808ebe30811653383283217b8a64e9f8f6b1339d9f92c2a8b3c4025344e2d6c2442dfa492ce9d807de3aaffb4ff8798a3001703cb15a3102578636f9d9c742c
SSDEEP 393216:+7vatQB/xfuYfYhS0QGKLe/4KywxRG4l:ywQtxfZrGKLuN3vG4
TLSH
T1F7F623D7A0BD92A9E1C307B01D8223CB35CC70565CB9991935CE5807FD5ACAE82CEB76
MD5 SHA1 SHA512 SSDEEP TLSH

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spoolsv.exe

Path \??\c:\windows\resources\spoolsv.exe
Size 135KB
SHA256 4462741a462c0ce9428d4db3701ab816c8f3db3ed029d387ef77f527d9bbeedd
MD5 599e79d943543fefdf4320453439d6fa
SHA1 683e68890bc6de71da5f8354b8b1a7535fec57af
SHA512 64040256fca457d2e62b134d4058bb543c1dcfbbbda8f6985474af57a7148d02175940beae15f6afeeb02afd4caa524a7fd4e8dcf9be54599e0ca4914e00c78f
SSDEEP 1536:UfsEqouTRcG/Mzvgf7xEuvnXNTRdUzwTekUOisZ1yDDajtXbVhpalMMMMMMMMMMw:UVqoCl/YgjxEufVU0TbTyDDalQl0
TLSH
T1ACD319277E146C7EDC16C6F134AAE62EBB226E3A0B907D137665BB10267254374F120F
MD5 SHA1 SHA512 SSDEEP TLSH

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memory/1468-53-0x0000000000400000-0x000000000041F000-memory.dmp

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memory/2368-48-0x0000000000400000-0x000000000041F000-memory.dmp

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memory/2416-50-0x0000000000400000-0x000000000041F000-memory.dmp

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memory/2620-0-0x0000000000400000-0x000000000041F000-memory.dmp

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memory/2620-51-0x0000000000400000-0x000000000041F000-memory.dmp

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memory/3760-49-0x0000000000400000-0x000000000041F000-memory.dmp

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memory/4956-52-0x0000000000400000-0x000000000041F000-memory.dmp

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