Analysis
- max time kernel
142s - max time network
144s - platform
windows10-2004_x64 - resource
win10v2004-20240226-en - resource tags
- submitted
19/03/2024, 02:42
General
- Target a841a1fe8b81516cb7d07d1bf57d663a26ce360e61f2f90c9dc046e9280bd318.exe
- Size 3.1MB
- Sample240319-c7debafc99
- SHA256 a841a1fe8b81516cb7d07d1bf57d663a26ce360e61f2f90c9dc046e9280bd318
Malware Config
Extracted
-
quasar
-
1.4.1
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Office04
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gjhfhgdg.insane.wang:3634
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5943d26f-e34d-4af2-bb6f-9aa3b1840ec8
-
encryption_key
997411AC284CD97048B61F90B41B906864F1171B
-
install_name
dfsdff.exe
-
log_directory
Logs
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reconnect_delay
3000
-
startup_key
windows defender process
-
subdirectory
fsfsf
Signatures
- Quasar RAT
Quasar is an open source Remote Access Tool.
- Quasar payload 2 IoCs
- Detects Windows executables referencing non-Windows User-Agents 2 IoCs
- Detects binaries (Windows and macOS) referencing many web browsers. Observed in information stealers. 2 IoCs
- Detects executables containing common artifacts observed in infostealers 2 IoCs
- Executes dropped EXE 1 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 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\a841a1fe8b81516cb7d07d1bf57d663a26ce360e61f2f90c9dc046e9280bd318.exe"C:\Users\Admin\AppData\Local\Temp\a841a1fe8b81516cb7d07d1bf57d663a26ce360e61f2f90c9dc046e9280bd318.exe"1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "windows defender process" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\fsfsf\dfsdff.exe" /rl HIGHEST /f2⤵
- Creates scheduled task(s)
-
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C:\Users\Admin\AppData\Roaming\fsfsf\dfsdff.exe"C:\Users\Admin\AppData\Roaming\fsfsf\dfsdff.exe"2⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
-
C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "windows defender process" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\fsfsf\dfsdff.exe" /rl HIGHEST /f3⤵
- Creates scheduled task(s)
-
-
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
dfsdff.exe
memory/1796-10-0x00007FFA4D9D0000-0x00007FFA4E491000-memory.dmp
memory/1796-11-0x000000001B870000-0x000000001B880000-memory.dmp
memory/1796-12-0x000000001B7C0000-0x000000001B810000-memory.dmp
memory/1796-13-0x000000001C030000-0x000000001C0E2000-memory.dmp
memory/1796-16-0x000000001B790000-0x000000001B7A2000-memory.dmp
memory/1796-17-0x000000001BF70000-0x000000001BFAC000-memory.dmp
memory/1796-18-0x00007FFA4D9D0000-0x00007FFA4E491000-memory.dmp
memory/4344-0-0x00000000001B0000-0x00000000004D4000-memory.dmp
memory/4344-1-0x00007FFA4D9D0000-0x00007FFA4E491000-memory.dmp
memory/4344-2-0x000000001B260000-0x000000001B270000-memory.dmp
memory/4344-9-0x00007FFA4D9D0000-0x00007FFA4E491000-memory.dmp