Analysis
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max time kernel
150s -
max time network
155s -
platform
windows7_x64 -
resource
win7-20221111-en -
resource tags
arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system -
submitted
29-11-2022 12:44
Static task
static1
Behavioral task
behavioral1
Sample
fbd46ea22af9ed39fbbd66a1c6ac9cc4.js
Resource
win7-20221111-en
Behavioral task
behavioral2
Sample
fbd46ea22af9ed39fbbd66a1c6ac9cc4.js
Resource
win10v2004-20221111-en
General
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Target
fbd46ea22af9ed39fbbd66a1c6ac9cc4.js
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Size
850KB
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MD5
e6bd21e0286aa3155c31cc7283338b91
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SHA1
a4a3e1b22e3b28aee3fa3c2ec42e20c17c564430
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SHA256
cbbb702f3317d7c2e99e511e7e48939c724423b5e38a15612d91864a70a3e707
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SHA512
ad79732bcce4dd262509f0550fad32e840c2e07d90f5daae835b3b24994ec9acd2d3a1196316cd1714d5e266c985ced287ea469356239271b3365045fc4d2dad
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SSDEEP
12288:KxUjeXvsDRhdpT0O+FT9524AKKBTncFPpw8xnMymrJN:X9MJf2nGPwrJN
Malware Config
Extracted
remcos
RemoteHost
45.139.105.174:3111
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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
true
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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-XI5CH7
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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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startup_value
Remcos
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take_screenshot_option
false
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take_screenshot_time
5
Signatures
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Blocklisted process makes network request 4 IoCs
Processes:
wscript.exeflow pid process 10 1256 wscript.exe 12 1256 wscript.exe 15 1256 wscript.exe 18 1256 wscript.exe -
Executes dropped EXE 2 IoCs
Processes:
3am.exeremcos.exepid process 652 3am.exe 616 remcos.exe -
Drops startup file 2 IoCs
Processes:
wscript.exedescription ioc process File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\UFeEEKYjMt.js wscript.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\UFeEEKYjMt.js wscript.exe -
Loads dropped DLL 2 IoCs
Processes:
cmd.exepid process 1536 cmd.exe 1536 cmd.exe -
Adds Run key to start application 2 TTPs 8 IoCs
Processes:
remcos.exe3am.exedescription ioc process Key created \REGISTRY\MACHINE\Software\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\ remcos.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\Remcos = "\"C:\\ProgramData\\Remcos\\remcos.exe\"" remcos.exe Key created \REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Windows\CurrentVersion\Run\ 3am.exe Set value (str) \REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Windows\CurrentVersion\Run\Remcos = "\"C:\\ProgramData\\Remcos\\remcos.exe\"" 3am.exe Key created \REGISTRY\MACHINE\Software\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\ 3am.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\Remcos = "\"C:\\ProgramData\\Remcos\\remcos.exe\"" 3am.exe Key created \REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Windows\CurrentVersion\Run\ remcos.exe Set value (str) \REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Windows\CurrentVersion\Run\Remcos = "\"C:\\ProgramData\\Remcos\\remcos.exe\"" remcos.exe -
Suspicious use of SetThreadContext 1 IoCs
Processes:
remcos.exedescription pid process target process PID 616 set thread context of 756 616 remcos.exe iexplore.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
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Suspicious behavior: MapViewOfSection 1 IoCs
Processes:
remcos.exepid process 616 remcos.exe -
Suspicious use of WriteProcessMemory 24 IoCs
Processes:
wscript.exe3am.exeWScript.execmd.exeremcos.exedescription pid process target process PID 1400 wrote to memory of 1256 1400 wscript.exe wscript.exe PID 1400 wrote to memory of 1256 1400 wscript.exe wscript.exe PID 1400 wrote to memory of 1256 1400 wscript.exe wscript.exe PID 1400 wrote to memory of 652 1400 wscript.exe 3am.exe PID 1400 wrote to memory of 652 1400 wscript.exe 3am.exe PID 1400 wrote to memory of 652 1400 wscript.exe 3am.exe PID 1400 wrote to memory of 652 1400 wscript.exe 3am.exe PID 652 wrote to memory of 1484 652 3am.exe WScript.exe PID 652 wrote to memory of 1484 652 3am.exe WScript.exe PID 652 wrote to memory of 1484 652 3am.exe WScript.exe PID 652 wrote to memory of 1484 652 3am.exe WScript.exe PID 1484 wrote to memory of 1536 1484 WScript.exe cmd.exe PID 1484 wrote to memory of 1536 1484 WScript.exe cmd.exe PID 1484 wrote to memory of 1536 1484 WScript.exe cmd.exe PID 1484 wrote to memory of 1536 1484 WScript.exe cmd.exe PID 1536 wrote to memory of 616 1536 cmd.exe remcos.exe PID 1536 wrote to memory of 616 1536 cmd.exe remcos.exe PID 1536 wrote to memory of 616 1536 cmd.exe remcos.exe PID 1536 wrote to memory of 616 1536 cmd.exe remcos.exe PID 616 wrote to memory of 756 616 remcos.exe iexplore.exe PID 616 wrote to memory of 756 616 remcos.exe iexplore.exe PID 616 wrote to memory of 756 616 remcos.exe iexplore.exe PID 616 wrote to memory of 756 616 remcos.exe iexplore.exe PID 616 wrote to memory of 756 616 remcos.exe iexplore.exe
Processes
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C:\Windows\system32\wscript.exewscript.exe C:\Users\Admin\AppData\Local\Temp\fbd46ea22af9ed39fbbd66a1c6ac9cc4.js1⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\System32\wscript.exe"C:\Windows\System32\wscript.exe" //B "C:\Users\Admin\AppData\Roaming\UFeEEKYjMt.js"2⤵
- Blocklisted process makes network request
- Drops startup file
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C:\Users\Admin\AppData\Roaming\3am.exe"C:\Users\Admin\AppData\Roaming\3am.exe"2⤵
- Executes dropped EXE
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\WScript.exe"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\gpdzrsigsvsnggnbgcsan.vbs"3⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /c "C:\ProgramData\Remcos\remcos.exe"4⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
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C:\ProgramData\Remcos\remcos.exeC:\ProgramData\Remcos\remcos.exe5⤵
- Executes dropped EXE
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
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\??\c:\program files (x86)\internet explorer\iexplore.exe"c:\program files (x86)\internet explorer\iexplore.exe"6⤵
Network
MITRE ATT&CK Matrix ATT&CK v6
Replay Monitor
Loading Replay Monitor...
Downloads
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C:\ProgramData\Remcos\remcos.exeFilesize
470KB
MD58f6f561ec65b393126f5b648f890e78a
SHA1cea6ff88ba56fcfdcf5992b5b35ec2accbd234a3
SHA2568acb8ff6a5565f9d8b56e2712858db04e577c53906c8045fa43bdf1e7669120a
SHA51258e2544db5c4a9771d3cfef8364e80f4b0fb954f7ace2585fbb619d5b9de641eaac6956127d61d5808874633033d3c6d4322fb250a47a7dce5a3c8f2e7f8b27b
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C:\ProgramData\Remcos\remcos.exeFilesize
470KB
MD58f6f561ec65b393126f5b648f890e78a
SHA1cea6ff88ba56fcfdcf5992b5b35ec2accbd234a3
SHA2568acb8ff6a5565f9d8b56e2712858db04e577c53906c8045fa43bdf1e7669120a
SHA51258e2544db5c4a9771d3cfef8364e80f4b0fb954f7ace2585fbb619d5b9de641eaac6956127d61d5808874633033d3c6d4322fb250a47a7dce5a3c8f2e7f8b27b
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C:\Users\Admin\AppData\Local\Temp\gpdzrsigsvsnggnbgcsan.vbsFilesize
386B
MD51ec6289c6fd4c2ded6b2836ed28cbeb5
SHA1c4e08195e6c640eb8860acc03fda1d649b4fe070
SHA2566efdc40f9eb217f879607614e928b65bff759e424f3efb31faceb2a043c32dc2
SHA51220bc46f4dee22f75f15c402c7c2eaee60fff7dd92548050585571dcbefd59485cc249c06bc3f1aac7a138e5ae67c0c3918b46ffa24c8b0f1b092e2f6b6e21288
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C:\Users\Admin\AppData\Roaming\3am.exeFilesize
470KB
MD58f6f561ec65b393126f5b648f890e78a
SHA1cea6ff88ba56fcfdcf5992b5b35ec2accbd234a3
SHA2568acb8ff6a5565f9d8b56e2712858db04e577c53906c8045fa43bdf1e7669120a
SHA51258e2544db5c4a9771d3cfef8364e80f4b0fb954f7ace2585fbb619d5b9de641eaac6956127d61d5808874633033d3c6d4322fb250a47a7dce5a3c8f2e7f8b27b
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C:\Users\Admin\AppData\Roaming\3am.exeFilesize
470KB
MD58f6f561ec65b393126f5b648f890e78a
SHA1cea6ff88ba56fcfdcf5992b5b35ec2accbd234a3
SHA2568acb8ff6a5565f9d8b56e2712858db04e577c53906c8045fa43bdf1e7669120a
SHA51258e2544db5c4a9771d3cfef8364e80f4b0fb954f7ace2585fbb619d5b9de641eaac6956127d61d5808874633033d3c6d4322fb250a47a7dce5a3c8f2e7f8b27b
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C:\Users\Admin\AppData\Roaming\UFeEEKYjMt.jsFilesize
5KB
MD57939b202fdfc11113b2e056609a5681a
SHA1ec68ff182bc21439e8c62d3678a36a097cdc0856
SHA256c7640f4cd18be6d75f6b01f71bcbe92343084d24759f4bce2b5eaff91e001ef5
SHA512bc75eea4367594c715f1e842368989791c445110b8a9eb295681810b4917604baca3314083796c5f6da7117bfba109ee6dde7e7ccd526101081b0e5f86c21681
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\ProgramData\Remcos\remcos.exeFilesize
470KB
MD58f6f561ec65b393126f5b648f890e78a
SHA1cea6ff88ba56fcfdcf5992b5b35ec2accbd234a3
SHA2568acb8ff6a5565f9d8b56e2712858db04e577c53906c8045fa43bdf1e7669120a
SHA51258e2544db5c4a9771d3cfef8364e80f4b0fb954f7ace2585fbb619d5b9de641eaac6956127d61d5808874633033d3c6d4322fb250a47a7dce5a3c8f2e7f8b27b
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\ProgramData\Remcos\remcos.exeFilesize
470KB
MD58f6f561ec65b393126f5b648f890e78a
SHA1cea6ff88ba56fcfdcf5992b5b35ec2accbd234a3
SHA2568acb8ff6a5565f9d8b56e2712858db04e577c53906c8045fa43bdf1e7669120a
SHA51258e2544db5c4a9771d3cfef8364e80f4b0fb954f7ace2585fbb619d5b9de641eaac6956127d61d5808874633033d3c6d4322fb250a47a7dce5a3c8f2e7f8b27b
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memory/616-69-0x0000000000000000-mapping.dmp
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memory/652-59-0x00000000759F1000-0x00000000759F3000-memory.dmpFilesize
8KB
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memory/652-57-0x0000000000000000-mapping.dmp
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memory/756-72-0x00000000000B292E-mapping.dmp
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memory/756-74-0x0000000000080000-0x00000000000FF000-memory.dmpFilesize
508KB
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memory/756-75-0x0000000000080000-0x00000000000FF000-memory.dmpFilesize
508KB
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memory/1256-55-0x0000000000000000-mapping.dmp
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memory/1400-54-0x000007FEFC3C1000-0x000007FEFC3C3000-memory.dmpFilesize
8KB
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memory/1484-61-0x0000000000000000-mapping.dmp
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memory/1536-65-0x0000000000000000-mapping.dmp