Analysis
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max time kernel
148s -
max time network
153s -
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 21:13
Behavioral task
behavioral1
Sample
remcos_a.exe
Resource
win7-20240708-en
General
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Target
remcos_a.exe
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Size
483KB
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MD5
b1b853c8e73a491934fcfb8d20c88ffd
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SHA1
b2b93eb66a46504fd389a6e8e207d83ff85930d8
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SHA256
4b80f8820d44f0b53482e7a5a5cfe6d44a0e2799055526e83d3779a241b4a639
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SHA512
2f3cdb5277a3d3cc8ea2418cf80d05afa9ce0af01ede5c85c65faa89143537d4742a17a5e7a70784cc995fd7e2075030b74c8e1086f5614f7528b12efff35265
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SSDEEP
6144:QTz+c6KHYBhDc1RGJdv//NkUn+N5Bkf/0TELRvIZPjbsAOZZBAXccrHT4:QTlrYw1RUh3NFn+N5WfIQIjbs/ZBUT4
Malware Config
Extracted
remcos
RemoteHost
software-julia.gl.at.ply.gg:17106
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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
true
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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-SMNGDV
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screenshot_crypt
false
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screenshot_flag
true
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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
true
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take_screenshot_time
5
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take_screenshot_title
roblox
Signatures
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Processes:
reg.exereg.exedescription ioc Process Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0" reg.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0" reg.exe -
Deletes itself 1 IoCs
Processes:
WScript.exepid Process 4320 WScript.exe -
Suspicious use of SetThreadContext 2 IoCs
Processes:
remcos_a.exeiexplore.exedescription pid Process procid_target PID 3876 set thread context of 4884 3876 remcos_a.exe 86 PID 4884 set thread context of 1720 4884 iexplore.exe 90 -
System Location Discovery: System Language Discovery 1 TTPs 7 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
Processes:
iexplore.execmd.execmd.exereg.exereg.exeWScript.exeremcos_a.exedescription ioc Process Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language iexplore.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language cmd.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language cmd.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language reg.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language reg.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language WScript.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language remcos_a.exe -
Modifies registry class 1 IoCs
Processes:
iexplore.exedescription ioc Process Key created \REGISTRY\USER\S-1-5-21-2718105630-359604950-2820636825-1000_Classes\Local Settings iexplore.exe -
Modifies registry key 1 TTPs 2 IoCs
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Suspicious behavior: EnumeratesProcesses 2 IoCs
Processes:
remcos_a.exepid Process 3876 remcos_a.exe 3876 remcos_a.exe -
Suspicious behavior: GetForegroundWindowSpam 1 IoCs
Processes:
iexplore.exepid Process 4884 iexplore.exe -
Suspicious behavior: MapViewOfSection 2 IoCs
Processes:
remcos_a.exeiexplore.exepid Process 3876 remcos_a.exe 4884 iexplore.exe -
Suspicious use of SetWindowsHookEx 1 IoCs
Processes:
iexplore.exepid Process 4884 iexplore.exe -
Suspicious use of WriteProcessMemory 23 IoCs
Processes:
remcos_a.exeiexplore.execmd.execmd.exedescription pid Process procid_target PID 3876 wrote to memory of 3344 3876 remcos_a.exe 84 PID 3876 wrote to memory of 3344 3876 remcos_a.exe 84 PID 3876 wrote to memory of 3344 3876 remcos_a.exe 84 PID 3876 wrote to memory of 4884 3876 remcos_a.exe 86 PID 3876 wrote to memory of 4884 3876 remcos_a.exe 86 PID 3876 wrote to memory of 4884 3876 remcos_a.exe 86 PID 3876 wrote to memory of 4884 3876 remcos_a.exe 86 PID 4884 wrote to memory of 4804 4884 iexplore.exe 88 PID 4884 wrote to memory of 4804 4884 iexplore.exe 88 PID 4884 wrote to memory of 4804 4884 iexplore.exe 88 PID 4884 wrote to memory of 1720 4884 iexplore.exe 90 PID 4884 wrote to memory of 1720 4884 iexplore.exe 90 PID 4884 wrote to memory of 1720 4884 iexplore.exe 90 PID 4884 wrote to memory of 1720 4884 iexplore.exe 90 PID 3344 wrote to memory of 3380 3344 cmd.exe 91 PID 3344 wrote to memory of 3380 3344 cmd.exe 91 PID 3344 wrote to memory of 3380 3344 cmd.exe 91 PID 4804 wrote to memory of 4924 4804 cmd.exe 92 PID 4804 wrote to memory of 4924 4804 cmd.exe 92 PID 4804 wrote to memory of 4924 4804 cmd.exe 92 PID 4884 wrote to memory of 4320 4884 iexplore.exe 113 PID 4884 wrote to memory of 4320 4884 iexplore.exe 113 PID 4884 wrote to memory of 4320 4884 iexplore.exe 113
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:3876 -
C:\Windows\SysWOW64\cmd.exe/k %windir%\System32\reg.exe ADD HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /t REG_DWORD /d 0 /f2⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3344 -
C:\Windows\SysWOW64\reg.exeC:\Windows\System32\reg.exe ADD HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /t REG_DWORD /d 0 /f3⤵
- UAC bypass
- System Location Discovery: System Language Discovery
- Modifies registry key
PID:3380
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\??\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
- Modifies registry class
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious behavior: MapViewOfSection
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4884 -
C:\Windows\SysWOW64\cmd.exe/k %windir%\System32\reg.exe ADD HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /t REG_DWORD /d 0 /f3⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4804 -
C:\Windows\SysWOW64\reg.exeC:\Windows\System32\reg.exe ADD HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /t REG_DWORD /d 0 /f4⤵
- UAC bypass
- System Location Discovery: System Language Discovery
- Modifies registry key
PID:4924
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C:\Windows\SysWOW64\svchost.exesvchost.exe3⤵PID:1720
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C:\Windows\SysWOW64\WScript.exe"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\xphtzsrhnwdktvumxxvuip.vbs"3⤵
- Deletes itself
- System Location Discovery: System Language Discovery
PID:4320
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
144B
MD53968c455b9033c36c2f86a3790a44522
SHA18cacd91f64a20f964fb213d0170b3e51f3cdd12f
SHA256da1ea7d475b44050e63f7df03ba247d0c731526fee40bb4b8b0890aeee0b434e
SHA512e0283037c7c72b327073bc1ee8bd7840bdc0f43f562db6a156630cd388c90419107f55d010a7a2c9f1d1faabed617a587228dc2ff483539b99741be91b07b09a
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Filesize
504B
MD5088cdc83bbaefe8ed56dafb50c9d61b1
SHA101a8a9188545dfe84b50b428e4bafc0f65d4719d
SHA256b74b99fbcd0c68b32e776827b3688f55d8f5746a35e92a82d1a019c91fe87b9c
SHA5125710d459135ec2a7e76e27dc799068d48adc909294d6de76140adfdb37c3ae101e71bb4365334fa78e16ba9b55aec168b2ce9d79558d82f255617a0b0a52c5a3