General
- Target catcrypt.exe
- Size 16.2MB
- Sample260922-xms99add26
- SHA256 0b8d0c09a693b79d246b83842e42a96c569e3c162122fcd352121f593ffc29fe
- MD5 71f5d17e4d2aa2113a4c0d9a6b97a8e0
- SHA1 6fb904612233834716cde688182c0d1984764dc6
- SHA512 a93603229a9a00136b743d4727070528d0103ac70957ca47fbf9d4f9c6310533b1fe0c79a5350c37f1d1fe4ea706668354457825f429338fdaa0c35cffef5a94
- SSDEEP 49152:1xn9du9BJAiiWGgt9IPXY32Z0PYriUTkqyDaDXVLh5PAzuKTW/UMXkRRJzS6i0sn:1x9
- TLSH T11A073038B9D518BE7B6759EE87F63A9D5909F3BBB3065D7C20B2314A43039098CE4724
- MD5 SHA1 SHA512 SSDEEP TLSH
Static task
static1
Behavioral task
behavioral1
Sample
catcrypt.exe
Resource
win10ltsc2021-20260911-en
Malware Config
Targets
-
- Target catcrypt.exe
- Size 16.2MB
- SHA256 0b8d0c09a693b79d246b83842e42a96c569e3c162122fcd352121f593ffc29fe
- MD5 71f5d17e4d2aa2113a4c0d9a6b97a8e0
- SHA1 6fb904612233834716cde688182c0d1984764dc6
- SHA512 a93603229a9a00136b743d4727070528d0103ac70957ca47fbf9d4f9c6310533b1fe0c79a5350c37f1d1fe4ea706668354457825f429338fdaa0c35cffef5a94
- SSDEEP 49152:1xn9du9BJAiiWGgt9IPXY32Z0PYriUTkqyDaDXVLh5PAzuKTW/UMXkRRJzS6i0sn:1x9
- TLSH T11A073038B9D518BE7B6759EE87F63A9D5909F3BBB3065D7C20B2314A43039098CE4724
- MD5 SHA1 SHA512 SSDEEP TLSH
-
Contains code to disable Windows Defender
A .NET executable tasked with disabling Windows Defender capabilities such as realtime monitoring, blocking at first seen, etc.
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Modifies WinLogon for persistence
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Modifies Windows Defender Real-time Protection settings
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UAC bypass
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Boot or Logon Autostart Execution: Active Setup
Adversaries may achieve persistence by adding a Registry key to the Active Setup of the local machine.
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Disables RegEdit via registry modification
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Disables Task Manager via registry modification
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Disables cmd.exe use via registry modification
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Drops file in Drivers directory
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Event Triggered Execution: Image File Execution Options Injection
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Checks computer location settings
Looks up country code configured in the registry, likely geofence.
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Executes dropped EXE
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Stops running service(s)
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Checks whether UAC is enabled
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Indicator Removal: Clear Persistence
Clear artifacts associated with previously established persistence like scheduletasks on a host.
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Executes a VBScript file via the Windows Script Host.
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Sets desktop wallpaper using registry
MITRE ATT&CK Enterprise v16
Execution
Command and Scripting Interpreter
3PowerShell
1Visual Basic
1Windows Command Shell
1Scheduled Task/Job
1Scheduled Task
1System Services
1Service Execution
1Persistence
Boot or Logon Autostart Execution
2Active Setup
1Winlogon Helper DLL
1Create or Modify System Process
3Windows Service
3Event Triggered Execution
1Image File Execution Options Injection
1Scheduled Task/Job
1Scheduled Task
1Privilege Escalation
Abuse Elevation Control Mechanism
1Bypass User Account Control
1Boot or Logon Autostart Execution
2Active Setup
1Winlogon Helper DLL
1Create or Modify System Process
3Windows Service
3Event Triggered Execution
1Image File Execution Options Injection
1Scheduled Task/Job
1Scheduled Task
1