Analysis
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max time kernel
406s -
max time network
1592s -
platform
windows10-1703_x64 -
resource
win10-20240404-en -
resource tags
arch:x64arch:x86image:win10-20240404-enlocale:en-usos:windows10-1703-x64system -
submitted
25-05-2024 01:30
General
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Target
client.exe
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Size
3.1MB
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MD5
4dfff8420e0d2f3a0e30a3ae8e005830
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SHA1
379546834fa347bdcf6a4aa1a9d956b540d33b55
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SHA256
7869d203ee2ffc4d75d4d542cc2e3a970ca249d675e8bc7bd4f9cc85c80cab69
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SHA512
6f4de859019a9ed236f6ddcbb03737c9e643368ae74fea3b36f7254a1b691448fb5f5befe4997554ed96f099309908f6b0a42d46161d3727d07620b1ecca94cb
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SSDEEP
49152:2vBt62XlaSFNWPjljiFa2RoUYIlQcMbKLoGdFewTHHB72eh2NT:2vr62XlaSFNWPjljiFXRoUYIlQcM2
Malware Config
Extracted
quasar
1.4.1
watchdog
142.115.43.39:8080
1c1f3ace-a14c-4361-99eb-65aedb6d50fd
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encryption_key
3FAEE4D5FC9BC245D4CA5F4165EAFD34E8D5FE16
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install_name
watchdog.exe
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log_directory
logs
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reconnect_delay
3000
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startup_key
watchdog
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subdirectory
drivers
Signatures
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Quasar payload 2 IoCs
Processes:
resource yara_rule behavioral1/memory/4700-1-0x0000000000290000-0x00000000005B4000-memory.dmp family_quasar C:\Windows\System32\drivers\watchdog.exe family_quasar -
Drops file in Drivers directory 3 IoCs
Processes:
client.exewatchdog.exedescription ioc process File created C:\Windows\system32\drivers\watchdog.exe client.exe File opened for modification C:\Windows\system32\drivers\watchdog.exe client.exe File opened for modification C:\Windows\system32\drivers\watchdog.exe watchdog.exe -
Executes dropped EXE 1 IoCs
Processes:
watchdog.exepid process 1084 watchdog.exe -
Drops file in System32 directory 2 IoCs
Processes:
client.exewatchdog.exedescription ioc process File opened for modification C:\Windows\system32\drivers client.exe File opened for modification C:\Windows\system32\drivers watchdog.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Creates scheduled task(s) 1 TTPs 2 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
Processes:
schtasks.exeschtasks.exepid process 4260 schtasks.exe 592 schtasks.exe -
Runs ping.exe 1 TTPs 1 IoCs
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Suspicious use of AdjustPrivilegeToken 2 IoCs
Processes:
client.exewatchdog.exedescription pid process Token: SeDebugPrivilege 4700 client.exe Token: SeDebugPrivilege 1084 watchdog.exe -
Suspicious use of SetWindowsHookEx 1 IoCs
Processes:
watchdog.exepid process 1084 watchdog.exe -
Suspicious use of WriteProcessMemory 14 IoCs
Processes:
client.exewatchdog.execmd.exedescription pid process target process PID 4700 wrote to memory of 592 4700 client.exe schtasks.exe PID 4700 wrote to memory of 592 4700 client.exe schtasks.exe PID 4700 wrote to memory of 1084 4700 client.exe watchdog.exe PID 4700 wrote to memory of 1084 4700 client.exe watchdog.exe PID 1084 wrote to memory of 4260 1084 watchdog.exe schtasks.exe PID 1084 wrote to memory of 4260 1084 watchdog.exe schtasks.exe PID 1084 wrote to memory of 4156 1084 watchdog.exe schtasks.exe PID 1084 wrote to memory of 4156 1084 watchdog.exe schtasks.exe PID 1084 wrote to memory of 1896 1084 watchdog.exe cmd.exe PID 1084 wrote to memory of 1896 1084 watchdog.exe cmd.exe PID 1896 wrote to memory of 4420 1896 cmd.exe chcp.com PID 1896 wrote to memory of 4420 1896 cmd.exe chcp.com PID 1896 wrote to memory of 4480 1896 cmd.exe PING.EXE PID 1896 wrote to memory of 4480 1896 cmd.exe PING.EXE -
Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
Processes
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C:\Users\Admin\AppData\Local\Temp\client.exe"C:\Users\Admin\AppData\Local\Temp\client.exe"1⤵
- Drops file in Drivers directory
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "watchdog" /sc ONLOGON /tr "C:\Windows\system32\drivers\watchdog.exe" /rl HIGHEST /f2⤵
- Creates scheduled task(s)
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C:\Windows\system32\drivers\watchdog.exe"C:\Windows\system32\drivers\watchdog.exe"2⤵
- Drops file in Drivers directory
- Executes dropped EXE
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
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C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "watchdog" /sc ONLOGON /tr "C:\Windows\system32\drivers\watchdog.exe" /rl HIGHEST /f3⤵
- Creates scheduled task(s)
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C:\Windows\SYSTEM32\schtasks.exe"schtasks" /delete /tn "watchdog" /f3⤵
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C:\Windows\system32\cmd.exeC:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\DgaxBjQgXIR0.bat" "3⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\system32\chcp.comchcp 650014⤵
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C:\Windows\system32\PING.EXEping -n 10 localhost4⤵
- Runs ping.exe
Network
MITRE ATT&CK Matrix ATT&CK v13
Replay Monitor
Loading Replay Monitor...
Downloads
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C:\Users\Admin\AppData\Local\Temp\DgaxBjQgXIR0.batFilesize
203B
MD5f4e2e62945b1d8cd38c15e9ddca594a4
SHA148ea069f686c869bb1ea53ba8bfd6eb344d183b1
SHA256bc4932e210ebd8a2f3745339933ac68330ccdc2eeb24ad2dba37aadf7da9afae
SHA512f163ba72e6c6fa461ef0f4e77324aa5f876967ec05e41bebd18704defaeeb2043c844a64006840f47b4626eefca926be27f2b38757656bb066afdc5aa914fbdf
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C:\Windows\System32\drivers\watchdog.exeFilesize
3.1MB
MD54dfff8420e0d2f3a0e30a3ae8e005830
SHA1379546834fa347bdcf6a4aa1a9d956b540d33b55
SHA2567869d203ee2ffc4d75d4d542cc2e3a970ca249d675e8bc7bd4f9cc85c80cab69
SHA5126f4de859019a9ed236f6ddcbb03737c9e643368ae74fea3b36f7254a1b691448fb5f5befe4997554ed96f099309908f6b0a42d46161d3727d07620b1ecca94cb
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memory/1084-11-0x00007FFDC0CF0000-0x00007FFDC16DC000-memory.dmpFilesize
9.9MB
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memory/1084-10-0x00007FFDC0CF0000-0x00007FFDC16DC000-memory.dmpFilesize
9.9MB
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memory/1084-12-0x000000001B760000-0x000000001B7B0000-memory.dmpFilesize
320KB
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memory/1084-13-0x000000001B870000-0x000000001B922000-memory.dmpFilesize
712KB
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memory/1084-16-0x000000001B810000-0x000000001B822000-memory.dmpFilesize
72KB
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memory/1084-17-0x000000001BF60000-0x000000001BF9E000-memory.dmpFilesize
248KB
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memory/1084-18-0x000000001C7D0000-0x000000001CCF6000-memory.dmpFilesize
5.1MB
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memory/1084-20-0x00007FFDC0CF0000-0x00007FFDC16DC000-memory.dmpFilesize
9.9MB
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memory/1084-29-0x00007FFDC0CF0000-0x00007FFDC16DC000-memory.dmpFilesize
9.9MB
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memory/4700-2-0x00007FFDC0CF0000-0x00007FFDC16DC000-memory.dmpFilesize
9.9MB
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memory/4700-9-0x00007FFDC0CF0000-0x00007FFDC16DC000-memory.dmpFilesize
9.9MB
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memory/4700-0-0x00007FFDC0CF3000-0x00007FFDC0CF4000-memory.dmpFilesize
4KB
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memory/4700-1-0x0000000000290000-0x00000000005B4000-memory.dmpFilesize
3.1MB