Analysis
-
max time kernel
148s -
max time network
137s -
platform
windows10-2004_x64 -
resource
win10v2004-20220812-en -
resource tags
arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system -
submitted
01-10-2022 03:03
Behavioral task
behavioral1
Sample
0x000a000000012319-56.exe
Resource
win7-20220812-en
Behavioral task
behavioral2
Sample
0x000a000000012319-56.exe
Resource
win10v2004-20220812-en
General
-
Target
0x000a000000012319-56.exe
-
Size
469KB
-
MD5
a0c98858ea96edb2386c86e1786f3419
-
SHA1
461ece495d357885b8ab78341374d830ad88cb76
-
SHA256
269546bd718741529021774e7032cf8da5075e2d18852ee0859c3c7a854f5950
-
SHA512
0d0f7ac9a4450be50e66ca6595870118a28cefe1d4fb4289be6f0e7747a90bfad7e899ae93ae78d8effdbdf156b313e40f18db633cd8c1b763c4ccb7d974febb
-
SSDEEP
12288:Wmnk7iLJbpIpiRL6I2WhSKQ9ZsfZQSvn9:uiLJbpI7I2WhQqZ7v9
Malware Config
Extracted
remcos
Firefox
elew3le3lanle.freeddns.org:20309
-
audio_folder
MicRecords
-
audio_record_time
5
-
connect_delay
0
-
connect_interval
1
-
copy_file
remcos.exe
-
copy_folder
Firefox
-
delete_file
true
-
hide_file
true
-
hide_keylog_file
false
-
install_flag
true
-
keylog_crypt
false
-
keylog_file
logs.dat
-
keylog_flag
false
-
keylog_folder
remcos
-
mouse_option
false
-
mutex
Rmc-Z26APQ
-
screenshot_crypt
false
-
screenshot_flag
false
-
screenshot_folder
Screenshots
-
screenshot_path
%AppData%
-
screenshot_time
10
-
startup_value
Firefox
-
take_screenshot_option
false
-
take_screenshot_time
5
Signatures
-
NirSoft MailPassView 1 IoCs
Password recovery tool for various email clients
Processes:
resource yara_rule behavioral2/memory/220-146-0x0000000000400000-0x0000000000457000-memory.dmp MailPassView -
NirSoft WebBrowserPassView 3 IoCs
Password recovery tool for various web browsers
Processes:
resource yara_rule behavioral2/memory/256-148-0x0000000000400000-0x0000000000478000-memory.dmp WebBrowserPassView behavioral2/memory/256-149-0x0000000000400000-0x0000000000478000-memory.dmp WebBrowserPassView behavioral2/memory/256-150-0x0000000000400000-0x0000000000478000-memory.dmp WebBrowserPassView -
Nirsoft 5 IoCs
Processes:
resource yara_rule behavioral2/memory/116-147-0x0000000000400000-0x0000000000424000-memory.dmp Nirsoft behavioral2/memory/220-146-0x0000000000400000-0x0000000000457000-memory.dmp Nirsoft behavioral2/memory/256-148-0x0000000000400000-0x0000000000478000-memory.dmp Nirsoft behavioral2/memory/256-149-0x0000000000400000-0x0000000000478000-memory.dmp Nirsoft behavioral2/memory/256-150-0x0000000000400000-0x0000000000478000-memory.dmp Nirsoft -
Executes dropped EXE 4 IoCs
Processes:
remcos.exeremcos.exeremcos.exeremcos.exepid process 1120 remcos.exe 256 remcos.exe 220 remcos.exe 116 remcos.exe -
Checks computer location settings 2 TTPs 2 IoCs
Looks up country code configured in the registry, likely geofence.
Processes:
0x000a000000012319-56.exeWScript.exedescription ioc process Key value queried \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Control Panel\International\Geo\Nation 0x000a000000012319-56.exe Key value queried \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Control Panel\International\Geo\Nation WScript.exe -
Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
-
Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs
Processes:
remcos.exedescription ioc process Key opened \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts remcos.exe -
Adds Run key to start application 2 TTPs 8 IoCs
Processes:
0x000a000000012319-56.exeremcos.exedescription ioc process Key created \REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\ 0x000a000000012319-56.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\Firefox = "\"C:\\ProgramData\\Firefox\\remcos.exe\"" 0x000a000000012319-56.exe Key created \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Software\Microsoft\Windows\CurrentVersion\Run\ remcos.exe Set value (str) \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Firefox = "\"C:\\ProgramData\\Firefox\\remcos.exe\"" remcos.exe Key created \REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\ remcos.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\Firefox = "\"C:\\ProgramData\\Firefox\\remcos.exe\"" remcos.exe Key created \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Software\Microsoft\Windows\CurrentVersion\Run\ 0x000a000000012319-56.exe Set value (str) \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Firefox = "\"C:\\ProgramData\\Firefox\\remcos.exe\"" 0x000a000000012319-56.exe -
Suspicious use of SetThreadContext 4 IoCs
Processes:
remcos.exedescription pid process target process PID 1120 set thread context of 1080 1120 remcos.exe svchost.exe PID 1120 set thread context of 256 1120 remcos.exe remcos.exe PID 1120 set thread context of 220 1120 remcos.exe remcos.exe PID 1120 set thread context of 116 1120 remcos.exe remcos.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
-
Modifies registry class 1 IoCs
Processes:
0x000a000000012319-56.exedescription ioc process Key created \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000_Classes\Local Settings 0x000a000000012319-56.exe -
Suspicious behavior: EnumeratesProcesses 6 IoCs
Processes:
remcos.exeremcos.exepid process 256 remcos.exe 256 remcos.exe 116 remcos.exe 116 remcos.exe 256 remcos.exe 256 remcos.exe -
Suspicious behavior: MapViewOfSection 4 IoCs
Processes:
remcos.exepid process 1120 remcos.exe 1120 remcos.exe 1120 remcos.exe 1120 remcos.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
Processes:
remcos.exedescription pid process Token: SeDebugPrivilege 116 remcos.exe -
Suspicious use of SetWindowsHookEx 1 IoCs
Processes:
remcos.exepid process 1120 remcos.exe -
Suspicious use of WriteProcessMemory 22 IoCs
Processes:
0x000a000000012319-56.exeWScript.execmd.exeremcos.exedescription pid process target process PID 4940 wrote to memory of 4740 4940 0x000a000000012319-56.exe WScript.exe PID 4940 wrote to memory of 4740 4940 0x000a000000012319-56.exe WScript.exe PID 4940 wrote to memory of 4740 4940 0x000a000000012319-56.exe WScript.exe PID 4740 wrote to memory of 4120 4740 WScript.exe cmd.exe PID 4740 wrote to memory of 4120 4740 WScript.exe cmd.exe PID 4740 wrote to memory of 4120 4740 WScript.exe cmd.exe PID 4120 wrote to memory of 1120 4120 cmd.exe remcos.exe PID 4120 wrote to memory of 1120 4120 cmd.exe remcos.exe PID 4120 wrote to memory of 1120 4120 cmd.exe remcos.exe PID 1120 wrote to memory of 1080 1120 remcos.exe svchost.exe PID 1120 wrote to memory of 1080 1120 remcos.exe svchost.exe PID 1120 wrote to memory of 1080 1120 remcos.exe svchost.exe PID 1120 wrote to memory of 1080 1120 remcos.exe svchost.exe PID 1120 wrote to memory of 256 1120 remcos.exe remcos.exe PID 1120 wrote to memory of 256 1120 remcos.exe remcos.exe PID 1120 wrote to memory of 256 1120 remcos.exe remcos.exe PID 1120 wrote to memory of 220 1120 remcos.exe remcos.exe PID 1120 wrote to memory of 220 1120 remcos.exe remcos.exe PID 1120 wrote to memory of 220 1120 remcos.exe remcos.exe PID 1120 wrote to memory of 116 1120 remcos.exe remcos.exe PID 1120 wrote to memory of 116 1120 remcos.exe remcos.exe PID 1120 wrote to memory of 116 1120 remcos.exe remcos.exe
Processes
-
C:\Users\Admin\AppData\Local\Temp\0x000a000000012319-56.exe"C:\Users\Admin\AppData\Local\Temp\0x000a000000012319-56.exe"1⤵
- Checks computer location settings
- Adds Run key to start application
- Modifies registry class
- Suspicious use of WriteProcessMemory
-
C:\Windows\SysWOW64\WScript.exe"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\install.vbs"2⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
-
C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /c "C:\ProgramData\Firefox\remcos.exe"3⤵
- Suspicious use of WriteProcessMemory
-
C:\ProgramData\Firefox\remcos.exeC:\ProgramData\Firefox\remcos.exe4⤵
- Executes dropped EXE
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious behavior: MapViewOfSection
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
-
C:\Windows\SysWOW64\svchost.exesvchost.exe5⤵
-
C:\ProgramData\Firefox\remcos.exeC:\ProgramData\Firefox\remcos.exe /stext "C:\Users\Admin\AppData\Local\Temp\ncczmhjsbjxgssywgu"5⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
-
C:\ProgramData\Firefox\remcos.exeC:\ProgramData\Firefox\remcos.exe /stext "C:\Users\Admin\AppData\Local\Temp\pxhjnzuuprpkcgmapfxjoh"5⤵
- Executes dropped EXE
- Accesses Microsoft Outlook accounts
-
C:\ProgramData\Firefox\remcos.exeC:\ProgramData\Firefox\remcos.exe /stext "C:\Users\Admin\AppData\Local\Temp\azvcoseodzhxenieypkczmyee"5⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
Network
MITRE ATT&CK Matrix ATT&CK v6
Replay Monitor
Loading Replay Monitor...
Downloads
-
C:\ProgramData\Firefox\remcos.exeFilesize
469KB
MD5a0c98858ea96edb2386c86e1786f3419
SHA1461ece495d357885b8ab78341374d830ad88cb76
SHA256269546bd718741529021774e7032cf8da5075e2d18852ee0859c3c7a854f5950
SHA5120d0f7ac9a4450be50e66ca6595870118a28cefe1d4fb4289be6f0e7747a90bfad7e899ae93ae78d8effdbdf156b313e40f18db633cd8c1b763c4ccb7d974febb
-
C:\ProgramData\Firefox\remcos.exeFilesize
469KB
MD5a0c98858ea96edb2386c86e1786f3419
SHA1461ece495d357885b8ab78341374d830ad88cb76
SHA256269546bd718741529021774e7032cf8da5075e2d18852ee0859c3c7a854f5950
SHA5120d0f7ac9a4450be50e66ca6595870118a28cefe1d4fb4289be6f0e7747a90bfad7e899ae93ae78d8effdbdf156b313e40f18db633cd8c1b763c4ccb7d974febb
-
C:\ProgramData\Firefox\remcos.exeFilesize
469KB
MD5a0c98858ea96edb2386c86e1786f3419
SHA1461ece495d357885b8ab78341374d830ad88cb76
SHA256269546bd718741529021774e7032cf8da5075e2d18852ee0859c3c7a854f5950
SHA5120d0f7ac9a4450be50e66ca6595870118a28cefe1d4fb4289be6f0e7747a90bfad7e899ae93ae78d8effdbdf156b313e40f18db633cd8c1b763c4ccb7d974febb
-
C:\ProgramData\Firefox\remcos.exeFilesize
469KB
MD5a0c98858ea96edb2386c86e1786f3419
SHA1461ece495d357885b8ab78341374d830ad88cb76
SHA256269546bd718741529021774e7032cf8da5075e2d18852ee0859c3c7a854f5950
SHA5120d0f7ac9a4450be50e66ca6595870118a28cefe1d4fb4289be6f0e7747a90bfad7e899ae93ae78d8effdbdf156b313e40f18db633cd8c1b763c4ccb7d974febb
-
C:\ProgramData\Firefox\remcos.exeFilesize
469KB
MD5a0c98858ea96edb2386c86e1786f3419
SHA1461ece495d357885b8ab78341374d830ad88cb76
SHA256269546bd718741529021774e7032cf8da5075e2d18852ee0859c3c7a854f5950
SHA5120d0f7ac9a4450be50e66ca6595870118a28cefe1d4fb4289be6f0e7747a90bfad7e899ae93ae78d8effdbdf156b313e40f18db633cd8c1b763c4ccb7d974febb
-
C:\Users\Admin\AppData\Local\Temp\install.vbsFilesize
542B
MD5a2fb356030b424d6942480d68d3637c1
SHA16f0c46fe28f9547702db198ad1615dc7fa5a69a6
SHA256b2790e93aca2e185e266ba4221f0a5aeb74a84fc9b60649caa9efca7af835116
SHA512fd2fcb0f40b16b7f6f05aaa397a90da9a904aaf54c22323d5a652fd66a99b24daaf4070be492fbeb6ddaf80f443d082652c902d812d38da54aefd55b7e051f42
-
C:\Users\Admin\AppData\Local\Temp\ncczmhjsbjxgssywguFilesize
4KB
MD507c14121728256ad56b1ef039a28e4a6
SHA10f39e1e02cd5e2b1b22d9e5470757ae13fe96738
SHA2568d46702077d776b04085cbe5ce2f0e5971595ea4e11b025a215c4379e7fc18f8
SHA51203d9113095e7b6143c4f99b131462fa451a9c2d7e841461603dace64bd6d525cb63d074384d2b3ff285a7183116f1715138beeb756fced9a6b1ad6fde36d4789
-
memory/116-147-0x0000000000400000-0x0000000000424000-memory.dmpFilesize
144KB
-
memory/116-144-0x0000000000000000-mapping.dmp
-
memory/220-142-0x0000000000000000-mapping.dmp
-
memory/220-146-0x0000000000400000-0x0000000000457000-memory.dmpFilesize
348KB
-
memory/256-140-0x0000000000000000-mapping.dmp
-
memory/256-148-0x0000000000400000-0x0000000000478000-memory.dmpFilesize
480KB
-
memory/256-149-0x0000000000400000-0x0000000000478000-memory.dmpFilesize
480KB
-
memory/256-150-0x0000000000400000-0x0000000000478000-memory.dmpFilesize
480KB
-
memory/1080-139-0x0000000000EC0000-0x0000000000F3F000-memory.dmpFilesize
508KB
-
memory/1080-138-0x0000000000000000-mapping.dmp
-
memory/1120-135-0x0000000000000000-mapping.dmp
-
memory/4120-134-0x0000000000000000-mapping.dmp
-
memory/4740-132-0x0000000000000000-mapping.dmp