Analysis
- max time kernel
149s - max time network
152s - platform
windows10-2004_x64 - resource
win10v2004-20240508-en - resource tags
- submitted
30/05/2024, 01:32
General
- Target c509ea51e44a654f104ab9fb8e5d681a871159c73fcf3f666245e303387329b2.exe
- Size 3.1MB
- Sample240530-byfbwaaf49
- SHA256 c509ea51e44a654f104ab9fb8e5d681a871159c73fcf3f666245e303387329b2
Malware Config
Extracted
-
quasar
-
1.4.1
-
Office04
-
31.177.108.29:4782
-
553dcf2c-4c70-4c0c-935a-2e078a46f03e
-
encryption_key
DAFF70D249B4EC619D5A052FDD3418E3549FF268
-
install_name
KR6nDu9fLhop1bFe.exe
-
log_directory
Logs
-
reconnect_delay
3000
-
startup_key
Defender.Process
-
subdirectory
SubDir
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 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\c509ea51e44a654f104ab9fb8e5d681a871159c73fcf3f666245e303387329b2.exe"C:\Users\Admin\AppData\Local\Temp\c509ea51e44a654f104ab9fb8e5d681a871159c73fcf3f666245e303387329b2.exe"1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
-
C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "Defender.Process" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\KR6nDu9fLhop1bFe.exe" /rl HIGHEST /f2⤵
- Creates scheduled task(s)
-
-
C:\Users\Admin\AppData\Roaming\SubDir\KR6nDu9fLhop1bFe.exe"C:\Users\Admin\AppData\Roaming\SubDir\KR6nDu9fLhop1bFe.exe"2⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
-
C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "Defender.Process" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\KR6nDu9fLhop1bFe.exe" /rl HIGHEST /f3⤵
- Creates scheduled task(s)
-
-
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
Loading Replay Monitor...
Downloads
KR6nDu9fLhop1bFe.exe
memory/2328-10-0x00007FF85B420000-0x00007FF85BEE1000-memory.dmp
memory/2328-11-0x00007FF85B420000-0x00007FF85BEE1000-memory.dmp
memory/2328-12-0x000000001BEE0000-0x000000001BF30000-memory.dmp
memory/2328-13-0x000000001BFF0000-0x000000001C0A2000-memory.dmp
memory/2328-14-0x00007FF85B420000-0x00007FF85BEE1000-memory.dmp
memory/3264-0-0x00007FF85B423000-0x00007FF85B425000-memory.dmp
memory/3264-1-0x00000000002A0000-0x00000000005C4000-memory.dmp
memory/3264-2-0x00007FF85B420000-0x00007FF85BEE1000-memory.dmp
memory/3264-9-0x00007FF85B420000-0x00007FF85BEE1000-memory.dmp