Analysis
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max time kernel
150s -
max time network
148s -
platform
windows7_x64 -
resource
win7-20241023-en -
resource tags
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submitted
21-11-2024 11:36
General
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Target
APPENDIXFORM_N45013-20241120.com.exe
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Size
681KB
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MD5
cf4530628bdb401e066ea81e86403d77
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SHA1
b929d4f89e537b8f932bebc75df0959ef9b406ee
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SHA256
e721952c765bb39555f2aa9f2141649fe2c1f2700224513c2860c8a7e25d2260
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SHA512
ab29e221be8b0b8318ebcd97d638034bf80368221713e15b3b016a0aa42f2f142c2ce2de68d3eb8a99a6d65e43a6268ea1a4db0f7436f6bcc5ff0e222c691d4a
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SSDEEP
12288:+3vFfP1t7YQ6RTw6F+i4nGxcigHvPyagJQMzoocD/f9Lw:A1r7YQ9lcc9Hv0QMzoZpw
Malware Config
Extracted
remcos
RemoteHost
45.133.158.36:11371
45.133.158.36:10051
45.133.158.36:10050
45.133.158.36:24554
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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
false
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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-CDCZ2K
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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
Signatures
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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 8 IoCs
Free utilities often used by attackers which can steal passwords, product keys, etc.
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NirSoft MailPassView 3 IoCs
Password recovery tool for various email clients
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NirSoft WebBrowserPassView 3 IoCs
Password recovery tool for various web browsers
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Loads dropped DLL 2 IoCs
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Reads user/profile data of web browsers 3 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
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Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs
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Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs
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Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs
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Suspicious use of SetThreadContext 4 IoCs
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Drops file in Program Files directory 3 IoCs
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Drops file in Windows directory 2 IoCs
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Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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System Location Discovery: System Language Discovery 1 TTPs 5 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
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Suspicious behavior: EnumeratesProcesses 2 IoCs
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Suspicious behavior: MapViewOfSection 4 IoCs
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Suspicious use of AdjustPrivilegeToken 1 IoCs
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Suspicious use of WriteProcessMemory 18 IoCs
Processes
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C:\Users\Admin\AppData\Local\Temp\APPENDIXFORM_N45013-20241120.com.exe"C:\Users\Admin\AppData\Local\Temp\APPENDIXFORM_N45013-20241120.com.exe"1⤵
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Drops file in Program Files directory
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\APPENDIXFORM_N45013-20241120.com.exe"C:\Users\Admin\AppData\Local\Temp\APPENDIXFORM_N45013-20241120.com.exe"2⤵
- Suspicious use of NtCreateThreadExHideFromDebugger
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\APPENDIXFORM_N45013-20241120.com.exeC:\Users\Admin\AppData\Local\Temp\APPENDIXFORM_N45013-20241120.com.exe /stext "C:\Users\Admin\AppData\Local\Temp\yyskxygsnxvcdwdnwytjt"3⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
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C:\Users\Admin\AppData\Local\Temp\APPENDIXFORM_N45013-20241120.com.exeC:\Users\Admin\AppData\Local\Temp\APPENDIXFORM_N45013-20241120.com.exe /stext "C:\Users\Admin\AppData\Local\Temp\jtfdyrrmbfnpndrrnjncwpld"3⤵
- Accesses Microsoft Outlook accounts
- System Location Discovery: System Language Discovery
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C:\Users\Admin\AppData\Local\Temp\APPENDIXFORM_N45013-20241120.com.exeC:\Users\Admin\AppData\Local\Temp\APPENDIXFORM_N45013-20241120.com.exe /stext "C:\Users\Admin\AppData\Local\Temp\tvlvyjcnpnfuprfdxuaehugmxndb"3⤵
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
Loading Replay Monitor...
Downloads
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Filesize
2B
MD5f3b25701fe362ec84616a93a45ce9998
SHA1d62636d8caec13f04e28442a0a6fa1afeb024bbb
SHA256b3d510ef04275ca8e698e5b3cbb0ece3949ef9252f0cdc839e9ee347409a2209
SHA51298c5f56f3de340690c139e58eb7dac111979f0d4dffe9c4b24ff849510f4b6ffa9fd608c0a3de9ac3c9fd2190f0efaf715309061490f9755a9bfdf1c54ca0d84
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Filesize
11KB
MD5960a5c48e25cf2bca332e74e11d825c9
SHA1da35c6816ace5daf4c6c1d57b93b09a82ecdc876
SHA256484f8e9f194ed9016274ef3672b2c52ed5f574fb71d3884edf3c222b758a75a2
SHA512cc450179e2d0d56aee2ccf8163d3882978c4e9c1aa3d3a95875fe9ba9831e07ddfd377111dc67f801fa53b6f468a418f086f1de7c71e0a5b634e1ae2a67cd3da
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Filesize
392KB
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Filesize
392KB
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Filesize
392KB
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Filesize
392KB
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Filesize
392KB
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Filesize
16.4MB
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Filesize
16.4MB
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Filesize
16.4MB
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Filesize
1.7MB
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Filesize
16.4MB
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Filesize
100KB
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Filesize
16.4MB
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Filesize
16.4MB
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Filesize
16.4MB
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Filesize
16.4MB
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Filesize
16.4MB
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Filesize
16.4MB
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Filesize
16.4MB
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Filesize
16.4MB
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Filesize
16.4MB
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Filesize
100KB
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Filesize
16.4MB
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Filesize
16.4MB
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Filesize
100KB
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Filesize
480KB
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Filesize
480KB
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Filesize
480KB
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Filesize
1.7MB
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Filesize
480KB
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Filesize
480KB
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Filesize
144KB
-
Filesize
144KB
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Filesize
144KB
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Filesize
144KB
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Filesize
17.0MB
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Filesize
17.0MB
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Filesize
1.0MB
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Filesize
1.7MB
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Filesize
17.0MB