7de1a0910a7aec98e5c3fc81432d692aff2086c94c71d5d44720c076d6dc6d65

Analysis

max time kernel
300s
platform
windows10-2004_x64
resource
win10v2004-20260911-en
resource tags

arch:x64arch:x86image:win10v2004-20260911-enlocale:en-usos:windows10-2004-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
1184	Loader.exe

Modifies registry class 8 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-681733028-2344970462-962213935-1000_Classes\CLSID\{F1600991-1490-41F3-922E-689C7E6543C8}\Shell\Manage\command	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-681733028-2344970462-962213935-1000_Classes\CLSID\{F1600991-1490-41F3-922E-689C7E6543C8}\Shell	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-681733028-2344970462-962213935-1000_Classes\CLSID\{F1600991-1490-41F3-922E-689C7E6543C8}\Shell\Manage\command\ = "\"C:\\ProgramData\\OpenraVPN\\Loader.exe\" "	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-681733028-2344970462-962213935-1000_Classes\CLSID	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-681733028-2344970462-962213935-1000_Classes\CLSID\{F1600991-1490-41F3-922E-689C7E6543C8}	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-681733028-2344970462-962213935-1000_Classes\CLSID\{F1600991-1490-41F3-922E-689C7E6543C8}\Shell\Manage	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-681733028-2344970462-962213935-1000_Classes\Local Settings	explorer.exe
Key created	\REGISTRY\USER\S-1-5-21-681733028-2344970462-962213935-1000_Classes\Local Settings	OpenWith.exe

Suspicious behavior: LoadsDriver 1 IoCs

pid	Process
656	Process not Found

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
5700	rundll32.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
5700	rundll32.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
944	OpenWith.exe

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 5700 wrote to memory of 4256	5700	rundll32.exe	85
PID 5124 wrote to memory of 1184	5124	explorer.exe	88

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:5700
- C:\Windows\explorer.exe
  explorer.exe shell:::{F1600991-1490-41F3-922E-689C7E6543C8}
  2⤵
  PID:4256

C:\Windows\explorer.exe
C:\Windows\explorer.exe /factory,{75dff2b7-6936-4c06-a8bb-676a7b00b24b} -Embedding
1⤵
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:5124
- C:\ProgramData\OpenraVPN\Loader.exe
  "C:\ProgramData\OpenraVPN\Loader.exe"
  2⤵
  - Executes dropped EXE
  PID:1184

C:\Windows\system32\OpenWith.exe
C:\Windows\system32\OpenWith.exe -Embedding
1⤵
- Modifies registry class
- Suspicious use of SetWindowsHookEx
PID:944

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 70KB
SHA256 b53f3c0cd32d7f20849850768da6431e5f876b7bfa61db0aa0700b02873393fa
MD5 ef3179d498793bf4234f708d3be28633
SHA1 dd399ae46303343f9f0da189aee11c67bd868222
SHA512 02aff154762d7e53e37754f878ce6aa3f4df5a1eb167e27f13d9762dced32bec892bfa3f3314e3c6dce5998f7d3c400d7d0314b9326eedcab72207c60b3d332e
SSDEEP 1536:J8qpnO/qRUNReI3fu6Uw2mTARPw2cm+YRQln5IUmDjoX:C/YUNRBfukTreXRQln5I
TLSH
T16B630BC9A66460F4E077953444734E099272BC22D7625ADF54F0F17C0FF36E0A93AAAB
MD5 SHA1 SHA512 SSDEEP TLSH

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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