7de1a0910a7aec98e5c3fc81432d692aff2086c94c71d5d44720c076d6dc6d65

Analysis

max time kernel
298s
max time network
132s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260911-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260911-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
16/09/2026, 09:49

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General

Target
calibre-launcher.dll
Size 156KB
Sample260916-ltdmlaycnf
SHA256 7de1a0910a7aec98e5c3fc81432d692aff2086c94c71d5d44720c076d6dc6d65
MD5 9603fd9e9f55de4ca86d366329cbe880
SHA1 075216daf9afd7045bdc36fd9b19f89f1ecd15af
SHA512 7da9b6510f469964a0fd87134fe78bf4f870fc0b2743b16e8955021ec521762c83a66380e50ef6fea14874e3fb0fb0e5dd6cdfce771dd52f17756cba2e7c14f2
SSDEEP 3072:neDws0VkGR9I/MuA5OFVqfLHgmnk2CZev9+s/x:neDJ0VkY9Sw2qfLHK2CZo9+s/x
TLSH
T1B1F3F84723F80465F2F76779ADB61502EE72BD860731D34F0290A26E0F66F90BD66722
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

defense_evasion trojan

Malware Config

Signatures

UAC bypass 3 TTPs 2 IoCs

defense_evasion trojan

Bypass User Account Control

T1548.002

Disable or Modify Tools

T1562.001

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorAdmin = "0"	rundll32.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\PromptOnSecureDesktop = "0"	rundll32.exe

Executes dropped EXE 1 IoCs

pid	Process
3544	Loader.exe

Modifies registry class 9 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-1404337215-1550464601-2805570857-1000_Classes\CLSID\{F93CB8E1-53C8-49E8-B86C-9CC59EAFCE24}\Shell\Manage	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-1404337215-1550464601-2805570857-1000_Classes\Local Settings	OpenWith.exe
Key created	\REGISTRY\USER\S-1-5-21-1404337215-1550464601-2805570857-1000_Classes\Local Settings	explorer.exe
Key created	\REGISTRY\USER\S-1-5-21-1404337215-1550464601-2805570857-1000_Classes\CLSID	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1404337215-1550464601-2805570857-1000_Classes\CLSID\{F93CB8E1-53C8-49E8-B86C-9CC59EAFCE24}\Shell\Manage\command\ = "\"C:\\ProgramData\\OpenraVPN\\Loader.exe\" "	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\CLSID\{A8CDFF1C-4878-43be-B5FD-F8091C1C60D0}\Instance\	explorer.exe
Key created	\REGISTRY\USER\S-1-5-21-1404337215-1550464601-2805570857-1000_Classes\CLSID\{F93CB8E1-53C8-49E8-B86C-9CC59EAFCE24}\Shell\Manage\command	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-1404337215-1550464601-2805570857-1000_Classes\CLSID\{F93CB8E1-53C8-49E8-B86C-9CC59EAFCE24}	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-1404337215-1550464601-2805570857-1000_Classes\CLSID\{F93CB8E1-53C8-49E8-B86C-9CC59EAFCE24}\Shell	rundll32.exe

Suspicious behavior: LoadsDriver 1 IoCs

pid	Process
824	Process not Found

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
1808	rundll32.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
1808	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
2748	OpenWith.exe
2112	explorer.exe

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 1808 wrote to memory of 2936	1808	rundll32.exe	89
PID 2112 wrote to memory of 3544	2112	explorer.exe	91

System policy modification 1 TTPs 2 IoCs

defense_evasion

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\PromptOnSecureDesktop = "0"	rundll32.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorAdmin = "0"	rundll32.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\calibre-launcher.dll,#1
1⤵
- UAC bypass
- Modifies registry class
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
- System policy modification
PID:1808
- C:\Windows\explorer.exe
  explorer.exe shell:::{F93CB8E1-53C8-49E8-B86C-9CC59EAFCE24}
  2⤵
  PID:2936

C:\Windows\system32\OpenWith.exe
C:\Windows\system32\OpenWith.exe -Embedding
1⤵
- Modifies registry class
- Suspicious use of SetWindowsHookEx
PID:2748

C:\Windows\explorer.exe
C:\Windows\explorer.exe /factory,{75dff2b7-6936-4c06-a8bb-676a7b00b24b} -Embedding
1⤵
- Modifies registry class
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2112
- C:\ProgramData\OpenraVPN\Loader.exe
  "C:\ProgramData\OpenraVPN\Loader.exe"
  2⤵
  - Executes dropped EXE
  PID:3544

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Abuse Elevation Control Mechanism

T1548

Bypass User Account Control

T1548.002

Defense Evasion

Abuse Elevation Control Mechanism

T1548

Bypass User Account Control

T1548.002

Impair Defenses

T1562

Disable or Modify Tools

T1562.001

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

Loader.exe

Path C:\ProgramData\OpenraVPN\Loader.exe
Size 88KB
SHA256 4b84dc6750937eb47b19cde0d23debd4d2f2211300171b36d13ef5ad11dd60f9
MD5 025b13bf5652712d9b596e6766a9c386
SHA1 def4011b5536983285472ba75c22c6a2410edf6a
SHA512 f9983b897ef7ecbeb6cbfe599b24f5aa8651058d2e3313534a2a5e076f93fc3354784c05260b42fa828e48a55b5c005bfaa9db4e387351bf2e665ea0245c3a1e
SSDEEP 1536:7i3jG+UJuhM2HLJPl1M8CFYNMjYrZ3bXWgmqR9jR:KkuB5GFYNME3C9KR
TLSH
T11993185E72A830E5E9369139C4A24605E3B1B03563135BFF06E0C2BD5F23AE5AD39F91
MD5 SHA1 SHA512 SSDEEP TLSH

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Analysis

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General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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