Analysis
- max time kernel
158s - max time network
156s - platform
windows10-2004_x64 - resource
win10v2004-20240226-en - resource tags
- submitted
27/03/2024, 04:31
General
- Target d9559beb6f4c2e8c37259b064f919035.exe
- Size 3.1MB
- Sample240327-e5nhlscg92
- SHA256 75e4fbbdf8b9454be057726463185b22ccf2fa7bdc579bf04118cd9de2731bb2
Malware Config
Extracted
-
quasar
-
1.4.1
-
Office04
-
127.0.0.1:4782
-
92d2697f-e562-4239-8439-98ac649844c6
-
encryption_key
4905BD0CABD5F31A0095C945FE6F6B7DDB11C96D
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install_name
svchost.exe
-
log_directory
Logs
-
reconnect_delay
3000
-
startup_key
svchost
-
subdirectory
svchost
Signatures
- Quasar RAT
Quasar is an open source Remote Access Tool.
- Quasar payload 3 IoCs
- Executes dropped EXE 1 IoCs
- Drops file in System32 directory 2 IoCs
- Creates scheduled task(s) 1 TTPs 2 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
- Suspicious use of AdjustPrivilegeToken 2 IoCs
- Suspicious use of SetWindowsHookEx 1 IoCs
- Suspicious use of WriteProcessMemory 6 IoCs
- 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
-
C:\Users\Admin\AppData\Local\Temp\d9559beb6f4c2e8c37259b064f919035.exe"C:\Users\Admin\AppData\Local\Temp\d9559beb6f4c2e8c37259b064f919035.exe"1⤵
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
-
C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "svchost" /sc ONLOGON /tr "C:\Windows\system32\svchost\svchost.exe" /rl HIGHEST /f2⤵
- Creates scheduled task(s)
-
-
C:\Windows\system32\svchost\svchost.exe"C:\Windows\system32\svchost\svchost.exe"2⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
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C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "svchost" /sc ONLOGON /tr "C:\Windows\system32\svchost\svchost.exe" /rl HIGHEST /f3⤵
- Creates scheduled task(s)
-
-
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
svchost.exe
svchost.exe
memory/1428-0-0x0000000000EE0000-0x0000000001204000-memory.dmp
memory/1428-2-0x0000000003420000-0x0000000003430000-memory.dmp
memory/1428-1-0x00007FFDF91D0000-0x00007FFDF9C91000-memory.dmp
memory/1428-8-0x00007FFDF91D0000-0x00007FFDF9C91000-memory.dmp
memory/3928-9-0x00007FFDF91D0000-0x00007FFDF9C91000-memory.dmp
memory/3928-10-0x000000001D250000-0x000000001D2A0000-memory.dmp
memory/3928-11-0x000000001D360000-0x000000001D412000-memory.dmp
memory/3928-12-0x00007FFDF91D0000-0x00007FFDF9C91000-memory.dmp