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Analysis
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max time kernel
29s -
max time network
34s -
platform
windows10-2004_x64 -
resource
win10v2004-20240508-en -
resource tags
arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system -
submitted
27/06/2024, 05:44
Static task
static1
Behavioral task
behavioral1
Sample
TAX DOCUMENTS 2/1099-MISC.pdf
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
TAX DOCUMENTS 2/1099-MISC.pdf
Resource
win10v2004-20240611-en
Behavioral task
behavioral3
Sample
TAX DOCUMENTS 2/W2_2023.exe
Resource
win7-20240611-en
Behavioral task
behavioral4
Sample
TAX DOCUMENTS 2/W2_2023.exe
Resource
win10v2004-20240508-en
Behavioral task
behavioral5
Sample
TAX DOCUMENTS 2/g2m.dll
Resource
win7-20240221-en
Behavioral task
behavioral6
Sample
TAX DOCUMENTS 2/g2m.dll
Resource
win10v2004-20240611-en
General
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Target
TAX DOCUMENTS 2/W2_2023.exe
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Size
39KB
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MD5
f1b14f71252de9ac763dbfbfbfc8c2dc
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SHA1
dcc2dcb26c1649887f1d5ae557a000b5fe34bb98
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SHA256
796ea1d27ed5825e300c3c9505a87b2445886623235f3e41258de90ba1604cd5
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SHA512
636a32fb8a88a542783aa57fe047b6bca47b2bd23b41b3902671c4e9036c6dbb97576be27fd2395a988653e6b63714277873e077519b4a06cdc5f63d3c4224e0
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SSDEEP
768:YRQnUhG5bZDOTpkdD82YbQkRFokFWIILPUh:FWObZDOTpk5T6zqAh
Malware Config
Extracted
remcos
RemoteHost
193.142.146.21:2404
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audio_folder
MicRecords
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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-24AV61
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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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Adds Run key to start application 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\*Chrome = "rundll32.exe C:\\Users\\Admin\\AppData\\Roaming\\VIVA_01.dll,EntryPoint" reg.exe -
Suspicious use of SetThreadContext 1 IoCs
description pid Process procid_target PID 3664 set thread context of 5016 3664 W2_2023.exe 81 -
Suspicious use of WriteProcessMemory 11 IoCs
description pid Process procid_target PID 3664 wrote to memory of 856 3664 W2_2023.exe 80 PID 3664 wrote to memory of 856 3664 W2_2023.exe 80 PID 3664 wrote to memory of 856 3664 W2_2023.exe 80 PID 3664 wrote to memory of 5016 3664 W2_2023.exe 81 PID 3664 wrote to memory of 5016 3664 W2_2023.exe 81 PID 3664 wrote to memory of 5016 3664 W2_2023.exe 81 PID 3664 wrote to memory of 5016 3664 W2_2023.exe 81 PID 3664 wrote to memory of 5016 3664 W2_2023.exe 81 PID 856 wrote to memory of 4872 856 cmd.exe 83 PID 856 wrote to memory of 4872 856 cmd.exe 83 PID 856 wrote to memory of 4872 856 cmd.exe 83
Processes
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C:\Users\Admin\AppData\Local\Temp\TAX DOCUMENTS 2\W2_2023.exe"C:\Users\Admin\AppData\Local\Temp\TAX DOCUMENTS 2\W2_2023.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3664 -
C:\Windows\SysWOW64\cmd.execmd.exe /C reg add "HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" /v "*Chrome" /t REG_SZ /d "rundll32.exe C:\Users\Admin\AppData\Roaming\VIVA_01.dll",EntryPoint /f & exit2⤵
- Suspicious use of WriteProcessMemory
PID:856 -
C:\Windows\SysWOW64\reg.exereg add "HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" /v "*Chrome" /t REG_SZ /d "rundll32.exe C:\Users\Admin\AppData\Roaming\VIVA_01.dll",EntryPoint /f3⤵
- Adds Run key to start application
PID:4872
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C:\Users\Admin\AppData\Local\Temp\TAX DOCUMENTS 2\W2_2023.exe"C:\Users\Admin\AppData\Local\Temp\TAX DOCUMENTS 2\W2_2023.exe"2⤵PID:5016
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