General
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Target
28032025_0043_HOLIDAY ADVISORY_pdf.bat.zip
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Size
677KB
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Sample
250328-a3bzksslt2
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MD5
3c738cf8ab8b5e27fa4a197687998456
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SHA1
ee3f5848b08bc312db9ed0ef0bcf8f8f5ea9b959
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SHA256
7201e7b9524c4f8a9618c3688d195c05f28221be67f8e1a51816f0972b6e8762
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SHA512
7ccbbd6d8c4bffb153485002f9f7c41e99edb953858e5117884fb9429cfc26b52a972c1b2b704da0690d944758d2b5ba3dd1d15227c719323c40241c0c6307a5
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SSDEEP
12288:wpdY+bBhvxrPOvb1C3d01SwgpT6IKR8XvEm2y5uwvtSZGlUAw4QD6eRehzG0xoVw:wzJBhvkpC3d0MBpT6IrXz2y5uwv0h/6d
Malware Config
Extracted
remcos
RemoteHost
127.0.0.1:2404
196.251.93.4:2404
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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
remcos.exe
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copy_folder
Remcos
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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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keylog_crypt
false
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keylog_file
logs.dat
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keylog_flag
false
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keylog_folder
remcos
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mouse_option
false
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mutex
Rmc-LQXWP4
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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
HOLIDAY ADVISORY_pdf.bat
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Size
831KB
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MD5
a262509d9e7799ba517432a2468b826e
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SHA1
d72c16f19686bf9afbb89347632eda3703396e90
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SHA256
f229c284ec539c5ee4feaea921a24a06c900079b4e8cb4b0965bdbb9f2fcef18
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SHA512
81fd20cad8f4a3ae4e4f3638b5242061968535d22032e7003288e59bbd7b0aebd719e39731345b2efbf2f2e66950735b05ae124b44d93a08660f6d0df6459c1a
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SSDEEP
24576:JUjfV4MC3d0qTpv6IPX9ky5awvY/X6eR8Mw2:kWt3djZ6IPDRqBXn
Score10/10-
Guloader family
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Guloader,Cloudeye
A shellcode based downloader first seen in 2020.
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Remcos
Remcos is a closed-source remote control and surveillance software.
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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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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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Adds Run key to start application
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Legitimate hosting services abused for malware hosting/C2
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Drops file in System32 directory
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Suspicious use of NtCreateThreadExHideFromDebugger
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Suspicious use of NtSetInformationThreadHideFromDebugger
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Target
$PLUGINSDIR/System.dll
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Size
11KB
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MD5
8b3830b9dbf87f84ddd3b26645fed3a0
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SHA1
223bef1f19e644a610a0877d01eadc9e28299509
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SHA256
f004c568d305cd95edbd704166fcd2849d395b595dff814bcc2012693527ac37
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SHA512
d13cfd98db5ca8dc9c15723eee0e7454975078a776bce26247228be4603a0217e166058ebadc68090afe988862b7514cb8cb84de13b3de35737412a6f0a8ac03
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SSDEEP
192:ex24sihno00Wfl97nH6BenXwWobpWBTtvShJ5omi7dJWjOlESlS:h8QIl972eXqlWBFSt273YOlEz
Score3/10 -