General
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Target
Backdoor.exe
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Size
36KB
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Sample
240930-xazw9stdqh
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MD5
7adbf0695e6b3744e4f800c4d5ea9302
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SHA1
c64d7721fae66e49c9e88a6e5effcc0ca9501d37
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SHA256
e639fcadaec03de9703201cd5ed26ee2bb56a698c49e662dd7b6edab6accbe69
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SHA512
719bd2eecccd929eac4faf3c121940548a8e732695e0bd890f97705cbb0d56b2f65553b822b20e48aaefa58d975ea1a6d70b5fffe65ae54595d14a8d00012c8b
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SSDEEP
768:uNnmZ/8vPlLUdhfJ8v6utFpVsOHjPgpG5o7D11ar1:Anwu4DejVdiG5ysr
Static task
static1
Behavioral task
behavioral1
Sample
Backdoor.exe
Resource
win7-20240903-en
Behavioral task
behavioral2
Sample
Backdoor.exe
Resource
win10v2004-20240802-en
Malware Config
Extracted
remcos
1.7 Pro
Host
192.168.200.176:2404
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audio_folder
audio
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audio_path
%AppData%
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audio_record_time
5
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connect_delay
0
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connect_interval
5
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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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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
remcos
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keylog_path
%AppData%
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mouse_option
false
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mutex
remcos_bzblukwtnxokphw
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screenshot_crypt
false
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screenshot_flag
true
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screenshot_folder
Screens
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screenshot_path
%AppData%
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screenshot_time
1
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startup_value
remcos
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take_screenshot_option
false
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take_screenshot_time
5
Targets
-
-
Target
Backdoor.exe
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Size
36KB
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MD5
7adbf0695e6b3744e4f800c4d5ea9302
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SHA1
c64d7721fae66e49c9e88a6e5effcc0ca9501d37
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SHA256
e639fcadaec03de9703201cd5ed26ee2bb56a698c49e662dd7b6edab6accbe69
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SHA512
719bd2eecccd929eac4faf3c121940548a8e732695e0bd890f97705cbb0d56b2f65553b822b20e48aaefa58d975ea1a6d70b5fffe65ae54595d14a8d00012c8b
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SSDEEP
768:uNnmZ/8vPlLUdhfJ8v6utFpVsOHjPgpG5o7D11ar1:Anwu4DejVdiG5ysr
Score10/10-
Modifies WinLogon for persistence
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Adds policy Run key to start application
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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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Modifies WinLogon
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MITRE ATT&CK Enterprise v15
Persistence
Boot or Logon Autostart Execution
4Registry Run Keys / Startup Folder
2Winlogon Helper DLL
2Privilege Escalation
Boot or Logon Autostart Execution
4Registry Run Keys / Startup Folder
2Winlogon Helper DLL
2