Analysis
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max time kernel
142s -
max time network
142s -
platform
windows7_x64 -
resource
win7-20240215-en -
resource tags
arch:x64arch:x86image:win7-20240215-enlocale:en-usos:windows7-x64system -
submitted
12-03-2024 02:45
Behavioral task
behavioral1
Sample
c241c794d9907434ffb83508ea0f5eeb.exe
Resource
win7-20240215-en
Behavioral task
behavioral2
Sample
c241c794d9907434ffb83508ea0f5eeb.exe
Resource
win10v2004-20240226-en
General
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Target
c241c794d9907434ffb83508ea0f5eeb.exe
-
Size
404KB
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MD5
c241c794d9907434ffb83508ea0f5eeb
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SHA1
9083b8bfc8c5e94ed517134fb9ea9e798fb10ab3
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SHA256
a605d51f7da78056ad5a2922d08b852b905acfe17f052156338b5df58c6a6b76
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SHA512
21cbded7587d58a78ea453b82f907b149f9193c9fd3fb977739920ec0c3b2120ce9afaf318d29ff0f72858b62b5afd64e06cb8237256a094a345ea334517432c
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SSDEEP
6144:m//Ic8/hZ8lsQ2fTQqOqIrIOmGCMdxT/y03RrAC1Hatc9cq7:mp8cQTQqOJrIOLdB/yoREC1HIi5
Malware Config
Extracted
remcos
Host
185.140.53.37:1900
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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
%WinDir%
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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_ewbkendenhpkpep
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screenshot_crypt
false
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screenshot_flag
false
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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
Extracted
remcos
1.7 Pro
Host
185.140.53.37:1900
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audio_folder
audio
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audio_path
%AppData%
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audio_record_time
5
-
connect_delay
0
-
connect_interval
5
-
copy_file
remcos.exe
-
copy_folder
remcos
-
delete_file
false
-
hide_file
false
-
hide_keylog_file
false
-
install_flag
true
-
install_path
%WinDir%
-
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_ewbkendenhpkpep
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screenshot_crypt
false
-
screenshot_flag
false
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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
-
take_screenshot_time
5
Signatures
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Executes dropped EXE 2 IoCs
Processes:
remcos.exeremcos.exepid process 2080 remcos.exe 2832 remcos.exe -
Loads dropped DLL 3 IoCs
Processes:
cmd.exeremcos.exepid process 2612 cmd.exe 2612 cmd.exe 2080 remcos.exe -
Processes:
resource yara_rule behavioral1/memory/2080-35-0x0000000000400000-0x00000000004B5000-memory.dmp upx C:\Windows\remcos\remcos.exe upx behavioral1/memory/2080-26-0x0000000000400000-0x00000000004B5000-memory.dmp upx behavioral1/memory/2612-23-0x00000000001B0000-0x0000000000265000-memory.dmp upx behavioral1/memory/2980-5-0x0000000000400000-0x00000000004B5000-memory.dmp upx behavioral1/memory/2980-0-0x0000000000400000-0x00000000004B5000-memory.dmp upx -
Adds Run key to start application 2 TTPs 2 IoCs
Processes:
c241c794d9907434ffb83508ea0f5eeb.exeremcos.exedescription ioc process Set value (str) \REGISTRY\USER\S-1-5-21-2248906074-2862704502-246302768-1000\Software\Microsoft\Windows\CurrentVersion\Run\remcos = "\"C:\\Windows\\remcos\\remcos.exe\"" c241c794d9907434ffb83508ea0f5eeb.exe Set value (str) \REGISTRY\USER\S-1-5-21-2248906074-2862704502-246302768-1000\Software\Microsoft\Windows\CurrentVersion\Run\remcos = "\"C:\\Windows\\remcos\\remcos.exe\"" remcos.exe -
Suspicious use of SetThreadContext 2 IoCs
Processes:
c241c794d9907434ffb83508ea0f5eeb.exeremcos.exedescription pid process target process PID 2980 set thread context of 1524 2980 c241c794d9907434ffb83508ea0f5eeb.exe c241c794d9907434ffb83508ea0f5eeb.exe PID 2080 set thread context of 2832 2080 remcos.exe remcos.exe -
Drops file in Windows directory 2 IoCs
Processes:
c241c794d9907434ffb83508ea0f5eeb.exedescription ioc process File opened for modification C:\Windows\remcos\remcos.exe c241c794d9907434ffb83508ea0f5eeb.exe File created C:\Windows\remcos\remcos.exe c241c794d9907434ffb83508ea0f5eeb.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Runs ping.exe 1 TTPs 1 IoCs
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Suspicious behavior: EnumeratesProcesses 2 IoCs
Processes:
c241c794d9907434ffb83508ea0f5eeb.exeremcos.exepid process 2980 c241c794d9907434ffb83508ea0f5eeb.exe 2080 remcos.exe -
Suspicious behavior: MapViewOfSection 2 IoCs
Processes:
c241c794d9907434ffb83508ea0f5eeb.exeremcos.exepid process 2980 c241c794d9907434ffb83508ea0f5eeb.exe 2080 remcos.exe -
Suspicious use of WriteProcessMemory 23 IoCs
Processes:
c241c794d9907434ffb83508ea0f5eeb.exec241c794d9907434ffb83508ea0f5eeb.execmd.exeremcos.exedescription pid process target process PID 2980 wrote to memory of 1524 2980 c241c794d9907434ffb83508ea0f5eeb.exe c241c794d9907434ffb83508ea0f5eeb.exe PID 2980 wrote to memory of 1524 2980 c241c794d9907434ffb83508ea0f5eeb.exe c241c794d9907434ffb83508ea0f5eeb.exe PID 2980 wrote to memory of 1524 2980 c241c794d9907434ffb83508ea0f5eeb.exe c241c794d9907434ffb83508ea0f5eeb.exe PID 2980 wrote to memory of 1524 2980 c241c794d9907434ffb83508ea0f5eeb.exe c241c794d9907434ffb83508ea0f5eeb.exe PID 1524 wrote to memory of 2612 1524 c241c794d9907434ffb83508ea0f5eeb.exe cmd.exe PID 1524 wrote to memory of 2612 1524 c241c794d9907434ffb83508ea0f5eeb.exe cmd.exe PID 1524 wrote to memory of 2612 1524 c241c794d9907434ffb83508ea0f5eeb.exe cmd.exe PID 1524 wrote to memory of 2612 1524 c241c794d9907434ffb83508ea0f5eeb.exe cmd.exe PID 1524 wrote to memory of 2612 1524 c241c794d9907434ffb83508ea0f5eeb.exe cmd.exe PID 1524 wrote to memory of 2612 1524 c241c794d9907434ffb83508ea0f5eeb.exe cmd.exe PID 1524 wrote to memory of 2612 1524 c241c794d9907434ffb83508ea0f5eeb.exe cmd.exe PID 2612 wrote to memory of 2728 2612 cmd.exe PING.EXE PID 2612 wrote to memory of 2728 2612 cmd.exe PING.EXE PID 2612 wrote to memory of 2728 2612 cmd.exe PING.EXE PID 2612 wrote to memory of 2728 2612 cmd.exe PING.EXE PID 2612 wrote to memory of 2080 2612 cmd.exe remcos.exe PID 2612 wrote to memory of 2080 2612 cmd.exe remcos.exe PID 2612 wrote to memory of 2080 2612 cmd.exe remcos.exe PID 2612 wrote to memory of 2080 2612 cmd.exe remcos.exe PID 2080 wrote to memory of 2832 2080 remcos.exe remcos.exe PID 2080 wrote to memory of 2832 2080 remcos.exe remcos.exe PID 2080 wrote to memory of 2832 2080 remcos.exe remcos.exe PID 2080 wrote to memory of 2832 2080 remcos.exe remcos.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\c241c794d9907434ffb83508ea0f5eeb.exe"C:\Users\Admin\AppData\Local\Temp\c241c794d9907434ffb83508ea0f5eeb.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\c241c794d9907434ffb83508ea0f5eeb.exe"C:\Users\Admin\AppData\Local\Temp\c241c794d9907434ffb83508ea0f5eeb.exe"2⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\cmd.execmd /c ""C:\Users\Admin\AppData\Local\Temp\install.bat" "3⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\PING.EXEPING 127.0.0.1 -n 24⤵
- Runs ping.exe
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C:\Windows\remcos\remcos.exe"C:\Windows\remcos\remcos.exe"4⤵
- Executes dropped EXE
- Loads dropped DLL
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
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C:\Windows\remcos\remcos.exe"C:\Windows\remcos\remcos.exe"5⤵
- Executes dropped EXE
- Adds Run key to start application
Network
MITRE ATT&CK Matrix ATT&CK v13
Replay Monitor
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Downloads
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C:\Users\Admin\AppData\Local\Temp\install.batFilesize
79B
MD5e31c5298e512a57c08e540781b438406
SHA1518d7fceb915e513207e90e9881f732b38cdaddc
SHA25690c22d29540b16f794cd58a9153c03dd96a0541851f875b549273c2ffdc63a36
SHA512828530316d7fce6f44b91f026878b0d46cc55a4d8cb6d5c2aa7e7d1f00b3f442578acd1b2ed1199b1ca70177bf08a3ed235508aa0bedfe079d13349c1619e8b7
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C:\Windows\remcos\remcos.exeFilesize
404KB
MD5c241c794d9907434ffb83508ea0f5eeb
SHA19083b8bfc8c5e94ed517134fb9ea9e798fb10ab3
SHA256a605d51f7da78056ad5a2922d08b852b905acfe17f052156338b5df58c6a6b76
SHA51221cbded7587d58a78ea453b82f907b149f9193c9fd3fb977739920ec0c3b2120ce9afaf318d29ff0f72858b62b5afd64e06cb8237256a094a345ea334517432c
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memory/1524-2-0x0000000000400000-0x0000000000417000-memory.dmpFilesize
92KB
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memory/1524-7-0x0000000000400000-0x0000000000417000-memory.dmpFilesize
92KB
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memory/1524-10-0x0000000000400000-0x0000000000417000-memory.dmpFilesize
92KB
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memory/1524-19-0x0000000000400000-0x0000000000417000-memory.dmpFilesize
92KB
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memory/2080-27-0x00000000001B0000-0x00000000001B1000-memory.dmpFilesize
4KB
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memory/2080-35-0x0000000000400000-0x00000000004B5000-memory.dmpFilesize
724KB
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memory/2080-36-0x00000000036E0000-0x00000000036F7000-memory.dmpFilesize
92KB
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memory/2080-29-0x00000000035C0000-0x00000000035C1000-memory.dmpFilesize
4KB
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memory/2080-33-0x00000000036E0000-0x0000000003795000-memory.dmpFilesize
724KB
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memory/2080-26-0x0000000000400000-0x00000000004B5000-memory.dmpFilesize
724KB
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memory/2612-23-0x00000000001B0000-0x0000000000265000-memory.dmpFilesize
724KB
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memory/2832-37-0x0000000000400000-0x0000000000417000-memory.dmpFilesize
92KB
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memory/2832-34-0x0000000000400000-0x0000000000417000-memory.dmpFilesize
92KB
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memory/2832-39-0x0000000000400000-0x0000000000417000-memory.dmpFilesize
92KB
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memory/2832-42-0x0000000000400000-0x0000000000417000-memory.dmpFilesize
92KB
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memory/2832-44-0x0000000000400000-0x0000000000417000-memory.dmpFilesize
92KB
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memory/2832-47-0x0000000000400000-0x0000000000417000-memory.dmpFilesize
92KB
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memory/2832-49-0x0000000000400000-0x0000000000417000-memory.dmpFilesize
92KB
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memory/2980-5-0x0000000000400000-0x00000000004B5000-memory.dmpFilesize
724KB
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memory/2980-4-0x0000000001F30000-0x0000000001F3B000-memory.dmpFilesize
44KB
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memory/2980-6-0x0000000001F40000-0x0000000001F41000-memory.dmpFilesize
4KB
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memory/2980-1-0x0000000000220000-0x0000000000221000-memory.dmpFilesize
4KB
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memory/2980-0-0x0000000000400000-0x00000000004B5000-memory.dmpFilesize
724KB