General
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Target
Windows_Security_Patch_KB5021130.exe
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Size
618KB
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Sample
250217-qpzrgszjar
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MD5
4b7cb7621606abd6ffb6d38bafafb8e9
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SHA1
831c1c044cdf6515ce3444444242015e8b52271f
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SHA256
1744bcc45c4af593d5f3a72c972bc86d1158fb3408fe03db2d80d28b2c51d7c8
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SHA512
98437691db7c50e50ece2de7caffddfe6a5bcb17af69754377bfbb195865a1362df6e911dfd6b7c9ebb17f98fae27c743a8518dc9348bcc10962f53e87e89d3a
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SSDEEP
12288:BrtxWWIHuw2W41RfGx6UL7Uhd9BKcaQID8G3e3JgFaX:BanHubW4DfGUtKcadQ3JO0
Static task
static1
Behavioral task
behavioral1
Sample
Windows_Security_Patch_KB5021130.exe
Resource
win7-20240903-en
Behavioral task
behavioral2
Sample
Windows_Security_Patch_KB5021130.exe
Resource
win10v2004-20250207-en
Malware Config
Extracted
remcos
googlegroupaccount2
107.174.65.146:1194
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audio_folder
MicRecords
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audio_path
ApplicationPath
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audio_record_time
5
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connect_delay
0
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connect_interval
1
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copy_file
googlegroupaccount.exe
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copy_folder
googlegroupaccount
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delete_file
false
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hide_file
false
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hide_keylog_file
false
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install_flag
true
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install_path
%AppData%
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keylog_crypt
false
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keylog_file
logs.dat
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keylog_flag
false
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keylog_folder
googlegroupaccount
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mouse_option
false
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mutex
Rmc-3UY7X7
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screenshot_crypt
false
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screenshot_flag
false
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screenshot_folder
Screenshots
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screenshot_path
%AppData%
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screenshot_time
10
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take_screenshot_option
false
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take_screenshot_time
5
Targets
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Target
Windows_Security_Patch_KB5021130.exe
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Size
618KB
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MD5
4b7cb7621606abd6ffb6d38bafafb8e9
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SHA1
831c1c044cdf6515ce3444444242015e8b52271f
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SHA256
1744bcc45c4af593d5f3a72c972bc86d1158fb3408fe03db2d80d28b2c51d7c8
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SHA512
98437691db7c50e50ece2de7caffddfe6a5bcb17af69754377bfbb195865a1362df6e911dfd6b7c9ebb17f98fae27c743a8518dc9348bcc10962f53e87e89d3a
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SSDEEP
12288:BrtxWWIHuw2W41RfGx6UL7Uhd9BKcaQID8G3e3JgFaX:BanHubW4DfGUtKcadQ3JO0
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Remcos family
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Detected Nirsoft tools
Free utilities often used by attackers which can steal passwords, product keys, etc.
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NirSoft MailPassView
Password recovery tool for various email clients
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NirSoft WebBrowserPassView
Password recovery tool for various web browsers
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Downloads MZ/PE file
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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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Loads dropped DLL
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Accesses Microsoft Outlook accounts
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Adds Run key to start application
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Suspicious use of SetThreadContext
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MITRE ATT&CK Enterprise v15
Privilege Escalation
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Credential Access
Credentials from Password Stores
1Credentials from Web Browsers
1Unsecured Credentials
1Credentials In Files
1