General
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Target
kdmapper.exe
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Size
4.4MB
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Sample
241227-q3lrsawkas
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MD5
f67ce1c7f9360af571a329573d0b38ed
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SHA1
f72c8ecaf324a31b2c3bf7ca15514af09ec3841f
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SHA256
ee45a91c9cf4646ec221733677e6ad5e50c32d10659528ffd6df4c25ff52e138
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SHA512
f2a55d9070f56d0bcbf6f4db36c3e9655c80e61db55720935369e0d4a1c59f5ec5e0907864b522af24fba17b85ebe60251b22d32a4b9afc1448bf7e3f0456fbd
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SSDEEP
49152:vm9xoQqBH6m4FTkEKVb0kxFAIXH3v2DK2cts9pX+D1+nISQbp2PyjzWT0q+Tnba:vTJhb+QzwCXuDKZts9p7epNAu
Static task
static1
Behavioral task
behavioral1
Sample
kdmapper.exe
Resource
win7-20240903-en
Behavioral task
behavioral2
Sample
kdmapper.exe
Resource
win10v2004-20241007-en
Malware Config
Extracted
gurcu
https://api.telegram.org/bot5762556674:AAEDKiSo2UQxhk0zMWyUd-HWI4AQklzutJI/sendPhot
Targets
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Target
kdmapper.exe
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Size
4.4MB
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MD5
f67ce1c7f9360af571a329573d0b38ed
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SHA1
f72c8ecaf324a31b2c3bf7ca15514af09ec3841f
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SHA256
ee45a91c9cf4646ec221733677e6ad5e50c32d10659528ffd6df4c25ff52e138
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SHA512
f2a55d9070f56d0bcbf6f4db36c3e9655c80e61db55720935369e0d4a1c59f5ec5e0907864b522af24fba17b85ebe60251b22d32a4b9afc1448bf7e3f0456fbd
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SSDEEP
49152:vm9xoQqBH6m4FTkEKVb0kxFAIXH3v2DK2cts9pX+D1+nISQbp2PyjzWT0q+Tnba:vTJhb+QzwCXuDKZts9p7epNAu
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DcRat
DarkCrystal(DC) is a new .NET RAT active since June 2019 capable of loading additional plugins.
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Dcrat family
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Gurcu family
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Modifies WinLogon for persistence
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Process spawned unexpected child process
This typically indicates the parent process was compromised via an exploit or macro.
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DCRat payload
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Command and Scripting Interpreter: PowerShell
Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.
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A potential corporate email address has been identified in the URL: [email protected]
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Checks computer location settings
Looks up country code configured in the registry, likely geofence.
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Deletes itself
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Executes dropped EXE
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Loads dropped DLL
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Adds Run key to start application
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Looks up external IP address via web service
Uses a legitimate IP lookup service to find the infected system's external IP.
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Drops file in System32 directory
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MITRE ATT&CK Enterprise v15
Execution
Command and Scripting Interpreter
1PowerShell
1Scheduled Task/Job
1Scheduled Task
1Persistence
Boot or Logon Autostart Execution
2Registry Run Keys / Startup Folder
1Winlogon Helper DLL
1Scheduled Task/Job
1Scheduled Task
1Privilege Escalation
Boot or Logon Autostart Execution
2Registry Run Keys / Startup Folder
1Winlogon Helper DLL
1Scheduled Task/Job
1Scheduled Task
1Defense Evasion
Hide Artifacts
1Hidden Files and Directories
1Modify Registry
3Subvert Trust Controls
1Install Root Certificate
1