Analysis
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max time kernel
148s -
max time network
148s -
platform
windows10-2004_x64 -
resource
win10v2004-20240802-en -
resource tags
arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system -
submitted
12-08-2024 05:54
Behavioral task
behavioral1
Sample
remcos_a.exe
Resource
win7-20240704-en
Behavioral task
behavioral2
Sample
remcos_a.exe
Resource
win10v2004-20240802-en
General
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Target
remcos_a.exe
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Size
483KB
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MD5
5b2027af10b3d0fb8fc1a5aca4fe2884
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SHA1
cd342301a2db8ba6bb540a7c3d1ab8491974991c
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SHA256
1aa8e0e39ef44f0906f9f8036df2eff25f53c985a22b24c4f8ac994c3cd5e6d2
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SHA512
1beb46efcad6bbacfd9daf3359609f502aecd8a546477d50b0de38ac161fcad7bcb1540fd6375a2adcbe0fdd21ca291a140847ed01f83942730996b8fc816413
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SSDEEP
6144:QTz+c6KHYBhDc1RGJdv//NkUn+N5Bkf/0TELRvIZPjbsAOZZBAXccrLT4:QTlrYw1RUh3NFn+N5WfIQIjbs/ZBIT4
Malware Config
Extracted
remcos
RemoteHost
192.168.1.252:2404
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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-K3NAY7
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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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Suspicious use of SetThreadContext 2 IoCs
Processes:
remcos_a.exeiexplore.exedescription pid Process procid_target PID 4672 set thread context of 5056 4672 remcos_a.exe 85 PID 5056 set thread context of 3532 5056 iexplore.exe 86 -
System Location Discovery: System Language Discovery 1 TTPs 2 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
Processes:
remcos_a.exeiexplore.exedescription ioc Process Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language remcos_a.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language iexplore.exe -
Suspicious behavior: EnumeratesProcesses 2 IoCs
Processes:
remcos_a.exepid Process 4672 remcos_a.exe 4672 remcos_a.exe -
Suspicious behavior: MapViewOfSection 2 IoCs
Processes:
remcos_a.exeiexplore.exepid Process 4672 remcos_a.exe 5056 iexplore.exe -
Suspicious use of SetWindowsHookEx 1 IoCs
Processes:
iexplore.exepid Process 5056 iexplore.exe -
Suspicious use of WriteProcessMemory 8 IoCs
Processes:
remcos_a.exeiexplore.exedescription pid Process procid_target PID 4672 wrote to memory of 5056 4672 remcos_a.exe 85 PID 4672 wrote to memory of 5056 4672 remcos_a.exe 85 PID 4672 wrote to memory of 5056 4672 remcos_a.exe 85 PID 4672 wrote to memory of 5056 4672 remcos_a.exe 85 PID 5056 wrote to memory of 3532 5056 iexplore.exe 86 PID 5056 wrote to memory of 3532 5056 iexplore.exe 86 PID 5056 wrote to memory of 3532 5056 iexplore.exe 86 PID 5056 wrote to memory of 3532 5056 iexplore.exe 86
Processes
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C:\Users\Admin\AppData\Local\Temp\remcos_a.exe"C:\Users\Admin\AppData\Local\Temp\remcos_a.exe"1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:4672 -
\??\c:\program files (x86)\internet explorer\iexplore.exe"c:\program files (x86)\internet explorer\iexplore.exe"2⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:5056 -
C:\Windows\SysWOW64\svchost.exesvchost.exe3⤵PID:3532
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
144B
MD5ce9409567a06261b3844a8ff356b6944
SHA1999a145ccf64d78ed1d267d54399777cebda30eb
SHA256a32df2593438506f117f1a396866a3972b34fb242f7f2eb773594ba158d27ea1
SHA512864626a34c900ce6bdda07e6a8db630b24fa9157e0098f1ef6db661a8181d657cc37144b74fc22f12fcf5b9be442544f64b73e22e15a976ce620ba11362ea297