Resubmissions
17/05/2026, 10:18
260517-mb5tssax6m1017/05/2026, 09:21
260517-lbj2naas4m1017/05/2026, 09:17
260517-k9drvsas3r10Analysis
- max time kernel
149s - max time network
142s - platform
windows11-21h2_x64 - resource
win11-20260513-es - resource tags
- submitted
17/05/2026, 09:21
General
- Target f5f0e52163104f81b6897b23284e625d9ddcab36751c1552b64a73004f824cf2.exe
- Size 2.6MB
- Sample260517-lbj2naas4m
- SHA256 f5f0e52163104f81b6897b23284e625d9ddcab36751c1552b64a73004f824cf2
Malware Config
Extracted
-
quasar
-
1.6.6
-
Office04
-
16.16.126.52:6385
-
31757616-807a-40f9-b0a3-7062b1df8d7f
-
encryption_key
7799F230382DEC15CFC54F1D560B5A8B875621D2
-
install_name
Runtime Broker.exe
-
key_salt
5a23f8394640cb9e40658446a04c0bbae82dc93d0470e1b2a406a90fd2520382
-
log_directory
logs
-
reconnect_delay
3000
-
startup_key
RuntimeBroker
-
subdirectory
system32
Signatures
- Family: Quasar RAT
Quasar is an open source Remote Access Tool.
- Quasar payload 2 IoCs
- Executes dropped EXE 1 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 2 IoCs
- Suspicious use of SetWindowsHookEx 1 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\f5f0e52163104f81b6897b23284e625d9ddcab36751c1552b64a73004f824cf2.exe"C:\Users\Admin\AppData\Local\Temp\f5f0e52163104f81b6897b23284e625d9ddcab36751c1552b64a73004f824cf2.exe"1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
-
C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "RuntimeBroker" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\system32\Runtime Broker.exe" /rl HIGHEST /f2⤵
- Scheduled Task/Job: Scheduled Task
-
-
C:\Users\Admin\AppData\Roaming\system32\Runtime Broker.exe"C:\Users\Admin\AppData\Roaming\system32\Runtime Broker.exe"2⤵
- Executes dropped EXE
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
-
C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "RuntimeBroker" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\system32\Runtime Broker.exe" /rl HIGHEST /f3⤵
- Scheduled Task/Job: Scheduled Task
-
-
Network
MITRE ATT&CK Enterprise v16
Replay Monitor
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Downloads
Runtime Broker.exe
memory/3932-13-0x000002895C510000-0x000002895C5C2000-memory.dmp
memory/3932-15-0x000002895C450000-0x000002895C49E000-memory.dmp
memory/3932-22-0x000002895C920000-0x000002895CA22000-memory.dmp
memory/3932-9-0x000002895C080000-0x000002895C090000-memory.dmp
memory/3932-10-0x00000289408C0000-0x00000289408D2000-memory.dmp
memory/3932-11-0x0000028942150000-0x000002894218A000-memory.dmp
memory/3932-12-0x000002895C0E0000-0x000002895C130000-memory.dmp
memory/3932-21-0x000002895C080000-0x000002895C090000-memory.dmp
memory/3932-20-0x000002895C670000-0x000002895C69A000-memory.dmp
memory/3932-14-0x000002895C090000-0x000002895C0DA000-memory.dmp
memory/3932-16-0x000002895C4A0000-0x000002895C4C6000-memory.dmp
memory/3932-17-0x000002895C4D0000-0x000002895C504000-memory.dmp
memory/3932-18-0x000002895C5D0000-0x000002895C61C000-memory.dmp
memory/3932-19-0x000002895C620000-0x000002895C66A000-memory.dmp
memory/4940-2-0x000001E390440000-0x000001E39045E000-memory.dmp
memory/4940-0-0x000001E38E5C0000-0x000001E38E85E000-memory.dmp
memory/4940-1-0x000001E390460000-0x000001E390470000-memory.dmp