Analysis
- max time kernel
149s - max time network
152s - platform
windows10-2004_x64 - resource
win10v2004-20260513-en - resource tags
- submitted
27/07/2026, 01:22
General
- Target 2026-07-27_8dfdbf247add372440a36485f3fb5fab_akira_cobalt-strike.exe
- Size 2.3MB
- Sample260727-brmsdatfmg
- SHA256 bd3ab56f2d56032d7ed9665bc42eac365943e80cb70ae2d7a1a1e2f32cb4c284
Malware Config
Extracted
-
quasar
-
key_salt
5a23f8394640cb9e40658446a04c0bbae82dc93d0470e1b2a406a90fd2520382
-
reconnect_delay
2997
Signatures
- Family: Quasar RAT
Quasar is an open source Remote Access Tool.
- Quasar payload 1 IoCs
- Detects Windows executables referencing non-Windows User-Agents 1 IoCs
- Detects binaries and memory artifacts referencing sandbox DLLs typically observed in sandbox evasion 1 IoCs
- Detects executables manipulated with Fody 1 IoCs
- Executes dropped EXE 2 IoCs
- Suspicious use of NtSetInformationThreadHideFromDebugger 3 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\2026-07-27_8dfdbf247add372440a36485f3fb5fab_akira_cobalt-strike.exe"C:\Users\Admin\AppData\Local\Temp\2026-07-27_8dfdbf247add372440a36485f3fb5fab_akira_cobalt-strike.exe"1⤵
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
-
C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "Microsoft Updater" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\MicrosoftOffice\OfficeUpdater.exe" /rl HIGHEST /f2⤵
- Scheduled Task/Job: Scheduled Task
-
-
C:\Users\Admin\AppData\Roaming\MicrosoftOffice\OfficeUpdater.exe"C:\Users\Admin\AppData\Roaming\MicrosoftOffice\OfficeUpdater.exe"2⤵
- Executes dropped EXE
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
-
C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "Microsoft Updater" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\MicrosoftOffice\OfficeUpdater.exe" /rl HIGHEST /f3⤵
- Scheduled Task/Job: Scheduled Task
-
-
-
C:\Users\Admin\AppData\Roaming\MicrosoftOffice\OfficeUpdater.exeC:\Users\Admin\AppData\Roaming\MicrosoftOffice\OfficeUpdater.exe1⤵
- Executes dropped EXE
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of AdjustPrivilegeToken
Network
MITRE ATT&CK Enterprise v16
Replay Monitor
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Downloads
OfficeUpdater.exe
memory/3244-0-0x00000186F7B70000-0x00000186F7B80000-memory.dmp
memory/3244-1-0x00000186F8560000-0x00000186F8656000-memory.dmp
memory/3244-2-0x00000186F7B70000-0x00000186F7B80000-memory.dmp
memory/3244-3-0x00000186F6080000-0x00000186F609A000-memory.dmp
memory/3244-4-0x00000186F7B70000-0x00000186F7B80000-memory.dmp
memory/3244-11-0x00007FF7CEF30000-0x00007FF7CF116000-memory.dmp
memory/4676-20-0x00007FF7F6700000-0x00007FF7F68E6000-memory.dmp
memory/5008-13-0x000001FB60D20000-0x000001FB60D30000-memory.dmp
memory/5008-12-0x000001FB60D20000-0x000001FB60D30000-memory.dmp
memory/5008-16-0x000001FB610C0000-0x000001FB61110000-memory.dmp
memory/5008-17-0x000001FB61250000-0x000001FB61302000-memory.dmp
memory/5008-18-0x000001FB61070000-0x000001FB610BE000-memory.dmp
memory/5008-14-0x000001FB60D20000-0x000001FB60D30000-memory.dmp
memory/5008-21-0x000001FB60D20000-0x000001FB60D30000-memory.dmp
memory/5008-22-0x000001FB60D20000-0x000001FB60D30000-memory.dmp
memory/5008-23-0x000001FB60D20000-0x000001FB60D30000-memory.dmp
memory/5008-24-0x00007FF7F6700000-0x00007FF7F68E6000-memory.dmp