Analysis
- max time kernel
149s - max time network
149s - platform
windows11-21h2_x64 - resource
win11-20260130-en - resource tags
- submitted
31/03/2026, 16:17
General
- Target putty.exe
- Size 1.6MB
- Sample260331-trbzzsbz2q
- SHA256 633d568ed65792c9252c83de73de6195451e9fa5a48f6ada0b3ba3dff080365f
Malware Config
Extracted
-
quasar
-
1.6.4
-
ROOT
-
147.185.221.31:38645
-
513b529d-c54d-4f9c-8468-22c3cef04b83
-
encryption_key
40D7753C8CCA8C897418CC08E3F9D66E79E90566
-
install_name
putty-64bit-0.81-installer.exe
-
key_salt
5a23f8394640cb9e40658446a04c0bbae82dc93d0470e1b2a406a90fd2520382
-
log_directory
ClashBot_PatchNotes
-
reconnect_delay
3000
-
startup_key
Update
-
subdirectory
SubDir
Signatures
- Quasar RAT
Quasar is an open source Remote Access Tool.
- Quasar family
- Quasar payload 2 IoCs
- Executes dropped EXE 2 IoCs
- Scheduled Task/Job: Scheduled Task 1 TTPs 2 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
- Suspicious behavior: AddClipboardFormatListener 1 IoCs
- Suspicious use of AdjustPrivilegeToken 3 IoCs
- Suspicious use of WriteProcessMemory 3 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\putty.exe"C:\Users\Admin\AppData\Local\Temp\putty.exe"1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
-
C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "Update" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\putty-64bit-0.81-installer.exe" /rl HIGHEST /f2⤵
- Scheduled Task/Job: Scheduled Task
-
-
C:\Users\Admin\AppData\Roaming\SubDir\putty-64bit-0.81-installer.exe"C:\Users\Admin\AppData\Roaming\SubDir\putty-64bit-0.81-installer.exe"2⤵
- Executes dropped EXE
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
-
C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "Update" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\putty-64bit-0.81-installer.exe" /rl HIGHEST /f3⤵
- Scheduled Task/Job: Scheduled Task
-
-
-
C:\Users\Admin\AppData\Roaming\SubDir\putty-64bit-0.81-installer.exeC:\Users\Admin\AppData\Roaming\SubDir\putty-64bit-0.81-installer.exe1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
Network
MITRE ATT&CK Enterprise v16
Replay Monitor
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Downloads
putty-64bit-0.81-installer.exe
memory/704-17-0x0000020C7B770000-0x0000020C7B782000-memory.dmp
memory/1536-19-0x0000020F1B4E0000-0x0000020F1B52A000-memory.dmp
memory/1536-15-0x0000020F1B3F0000-0x0000020F1B43E000-memory.dmp
memory/1536-21-0x0000020F02690000-0x0000020F026A2000-memory.dmp
memory/1536-10-0x0000020F1B1E0000-0x0000020F1B1F0000-memory.dmp
memory/1536-12-0x0000020F1B180000-0x0000020F1B1BA000-memory.dmp
memory/1536-13-0x0000020F1B440000-0x0000020F1B490000-memory.dmp
memory/1536-14-0x0000020F1B550000-0x0000020F1B602000-memory.dmp
memory/1536-22-0x0000020F1B1E0000-0x0000020F1B1F0000-memory.dmp
memory/1536-20-0x0000020F1B000000-0x0000020F1B02A000-memory.dmp
memory/1536-18-0x0000020F1B490000-0x0000020F1B4DC000-memory.dmp
memory/3048-0-0x00000218DA630000-0x00000218DA7CC000-memory.dmp
memory/3048-1-0x00000218F4DC0000-0x00000218F4DD0000-memory.dmp
memory/3048-2-0x00000218DAC10000-0x00000218DAC2C000-memory.dmp
memory/3048-9-0x00000218F50D0000-0x00000218F50E2000-memory.dmp